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Message-ID: <CAJqdLrrZ7Q=xjoP-HpdVAwxJxYtA97C3Z=y8ygi0PDQuVFc7aA@mail.gmail.com>
Date: Tue, 4 Nov 2025 10:11:58 +0100
From: Alexander Mikhalitsyn <alexander@...alicyn.com>
To: Christian Brauner <brauner@...nel.org>
Cc: linux-fsdevel@...r.kernel.org, Oleg Nesterov <oleg@...hat.com>,
Amir Goldstein <amir73il@...il.com>, Aleksa Sarai <cyphar@...har.com>,
Yu Watanabe <watanabe.yu+github@...il.com>, Josef Bacik <josef@...icpanda.com>,
Jeff Layton <jlayton@...nel.org>, Jann Horn <jannh@...gle.com>,
Luca Boccassi <luca.boccassi@...il.com>, linux-kernel@...r.kernel.org,
Alexander Viro <viro@...iv.linux.org.uk>, Jan Kara <jack@...e.cz>,
Lennart Poettering <lennart@...ttering.net>, Mike Yuan <me@...dnzj.com>,
Zbigniew Jędrzejewski-Szmek <zbyszek@...waw.pl>
Subject: Re: [PATCH 13/22] selftests/coredump: split out coredump socket tests
Am Di., 28. Okt. 2025 um 09:47 Uhr schrieb Christian Brauner
<brauner@...nel.org>:
>
> Split the coredump socket tests into separate files.
>
> Signed-off-by: Christian Brauner <brauner@...nel.org>
Reviewed-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@...onical.com>
> ---
> tools/testing/selftests/coredump/.gitignore | 4 +
> tools/testing/selftests/coredump/Makefile | 8 +-
> .../coredump/coredump_socket_protocol_test.c | 1315 ++++++++++++++++
> .../selftests/coredump/coredump_socket_test.c | 394 +++++
> tools/testing/selftests/coredump/stackdump_test.c | 1662 +-------------------
> 5 files changed, 1722 insertions(+), 1661 deletions(-)
>
> diff --git a/tools/testing/selftests/coredump/.gitignore b/tools/testing/selftests/coredump/.gitignore
> new file mode 100644
> index 000000000000..097f52db0be9
> --- /dev/null
> +++ b/tools/testing/selftests/coredump/.gitignore
> @@ -0,0 +1,4 @@
> +# SPDX-License-Identifier: GPL-2.0-only
> +stackdump_test
> +coredump_socket_test
> +coredump_socket_protocol_test
> diff --git a/tools/testing/selftests/coredump/Makefile b/tools/testing/selftests/coredump/Makefile
> index 77b3665c73c7..dece1a31d561 100644
> --- a/tools/testing/selftests/coredump/Makefile
> +++ b/tools/testing/selftests/coredump/Makefile
> @@ -1,7 +1,13 @@
> # SPDX-License-Identifier: GPL-2.0-only
> CFLAGS += -Wall -O0 -g $(KHDR_INCLUDES) $(TOOLS_INCLUDES)
>
> -TEST_GEN_PROGS := stackdump_test
> +TEST_GEN_PROGS := stackdump_test \
> + coredump_socket_test \
> + coredump_socket_protocol_test
> TEST_FILES := stackdump
>
> include ../lib.mk
> +
> +$(OUTPUT)/stackdump_test: coredump_test_helpers.c
> +$(OUTPUT)/coredump_socket_test: coredump_test_helpers.c
> +$(OUTPUT)/coredump_socket_protocol_test: coredump_test_helpers.c
> diff --git a/tools/testing/selftests/coredump/coredump_socket_protocol_test.c b/tools/testing/selftests/coredump/coredump_socket_protocol_test.c
> new file mode 100644
> index 000000000000..cc7364499c55
> --- /dev/null
> +++ b/tools/testing/selftests/coredump/coredump_socket_protocol_test.c
> @@ -0,0 +1,1315 @@
> +// SPDX-License-Identifier: GPL-2.0
> +
> +#include <sys/stat.h>
> +#include <sys/epoll.h>
> +#include <sys/socket.h>
> +#include <sys/un.h>
> +
> +#include "coredump_test.h"
> +
> +#define NUM_CRASHING_COREDUMPS 5
> +
> +FIXTURE_SETUP(coredump)
> +{
> + FILE *file;
> + int ret;
> +
> + self->pid_coredump_server = -ESRCH;
> + self->fd_tmpfs_detached = -1;
> + file = fopen("/proc/sys/kernel/core_pattern", "r");
> + ASSERT_NE(NULL, file);
> +
> + ret = fread(self->original_core_pattern, 1, sizeof(self->original_core_pattern), file);
> + ASSERT_TRUE(ret || feof(file));
> + ASSERT_LT(ret, sizeof(self->original_core_pattern));
> +
> + self->original_core_pattern[ret] = '\0';
> + self->fd_tmpfs_detached = create_detached_tmpfs();
> + ASSERT_GE(self->fd_tmpfs_detached, 0);
> +
> + ret = fclose(file);
> + ASSERT_EQ(0, ret);
> +}
> +
> +FIXTURE_TEARDOWN(coredump)
> +{
> + const char *reason;
> + FILE *file;
> + int ret, status;
> +
> + if (self->pid_coredump_server > 0) {
> + kill(self->pid_coredump_server, SIGTERM);
> + waitpid(self->pid_coredump_server, &status, 0);
> + }
> + unlink("/tmp/coredump.file");
> + unlink("/tmp/coredump.socket");
> +
> + file = fopen("/proc/sys/kernel/core_pattern", "w");
> + if (!file) {
> + reason = "Unable to open core_pattern";
> + goto fail;
> + }
> +
> + ret = fprintf(file, "%s", self->original_core_pattern);
> + if (ret < 0) {
> + reason = "Unable to write to core_pattern";
> + goto fail;
> + }
> +
> + ret = fclose(file);
> + if (ret) {
> + reason = "Unable to close core_pattern";
> + goto fail;
> + }
> +
> + if (self->fd_tmpfs_detached >= 0) {
> + ret = close(self->fd_tmpfs_detached);
> + if (ret < 0) {
> + reason = "Unable to close detached tmpfs";
> + goto fail;
> + }
> + self->fd_tmpfs_detached = -1;
> + }
> +
> + return;
> +fail:
> + /* This should never happen */
> + fprintf(stderr, "Failed to cleanup coredump test: %s\n", reason);
> +}
> +
> +TEST_F(coredump, socket_request_kernel)
> +{
> + int pidfd, ret, status;
> + pid_t pid, pid_coredump_server;
> + struct stat st;
> + struct pidfd_info info = {};
> + int ipc_sockets[2];
> + char c;
> +
> + ASSERT_TRUE(set_core_pattern("@@/tmp/coredump.socket"));
> +
> + ret = socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, ipc_sockets);
> + ASSERT_EQ(ret, 0);
> +
> + pid_coredump_server = fork();
> + ASSERT_GE(pid_coredump_server, 0);
> + if (pid_coredump_server == 0) {
> + struct coredump_req req = {};
> + int fd_server = -1, fd_coredump = -1, fd_core_file = -1, fd_peer_pidfd = -1;
> + int exit_code = EXIT_FAILURE;
> +
> + close(ipc_sockets[0]);
> +
> + fd_server = create_and_listen_unix_socket("/tmp/coredump.socket");
> + if (fd_server < 0)
> + goto out;
> +
> + if (write_nointr(ipc_sockets[1], "1", 1) < 0)
> + goto out;
> +
> + close(ipc_sockets[1]);
> +
> + fd_coredump = accept4(fd_server, NULL, NULL, SOCK_CLOEXEC);
> + if (fd_coredump < 0)
> + goto out;
> +
> + fd_peer_pidfd = get_peer_pidfd(fd_coredump);
> + if (fd_peer_pidfd < 0)
> + goto out;
> +
> + if (!get_pidfd_info(fd_peer_pidfd, &info))
> + goto out;
> +
> + if (!(info.mask & PIDFD_INFO_COREDUMP))
> + goto out;
> +
> + if (!(info.coredump_mask & PIDFD_COREDUMPED))
> + goto out;
> +
> + fd_core_file = creat("/tmp/coredump.file", 0644);
> + if (fd_core_file < 0)
> + goto out;
> +
> + if (!read_coredump_req(fd_coredump, &req))
> + goto out;
> +
> + if (!check_coredump_req(&req, COREDUMP_ACK_SIZE_VER0,
> + COREDUMP_KERNEL | COREDUMP_USERSPACE |
> + COREDUMP_REJECT | COREDUMP_WAIT))
> + goto out;
> +
> + if (!send_coredump_ack(fd_coredump, &req,
> + COREDUMP_KERNEL | COREDUMP_WAIT, 0))
> + goto out;
> +
> + if (!read_marker(fd_coredump, COREDUMP_MARK_REQACK))
> + goto out;
> +
> + for (;;) {
> + char buffer[4096];
> + ssize_t bytes_read, bytes_write;
> +
> + bytes_read = read(fd_coredump, buffer, sizeof(buffer));
> + if (bytes_read < 0)
> + goto out;
> +
> + if (bytes_read == 0)
> + break;
> +
> + bytes_write = write(fd_core_file, buffer, bytes_read);
> + if (bytes_read != bytes_write)
> + goto out;
> + }
> +
> + exit_code = EXIT_SUCCESS;
> +out:
> + if (fd_core_file >= 0)
> + close(fd_core_file);
> + if (fd_peer_pidfd >= 0)
> + close(fd_peer_pidfd);
> + if (fd_coredump >= 0)
> + close(fd_coredump);
> + if (fd_server >= 0)
> + close(fd_server);
> + _exit(exit_code);
> + }
> + self->pid_coredump_server = pid_coredump_server;
> +
> + EXPECT_EQ(close(ipc_sockets[1]), 0);
> + ASSERT_EQ(read_nointr(ipc_sockets[0], &c, 1), 1);
> + EXPECT_EQ(close(ipc_sockets[0]), 0);
> +
> + pid = fork();
> + ASSERT_GE(pid, 0);
> + if (pid == 0)
> + crashing_child();
> +
> + pidfd = sys_pidfd_open(pid, 0);
> + ASSERT_GE(pidfd, 0);
> +
> + waitpid(pid, &status, 0);
> + ASSERT_TRUE(WIFSIGNALED(status));
> + ASSERT_TRUE(WCOREDUMP(status));
> +
> + ASSERT_TRUE(get_pidfd_info(pidfd, &info));
> + ASSERT_GT((info.mask & PIDFD_INFO_COREDUMP), 0);
> + ASSERT_GT((info.coredump_mask & PIDFD_COREDUMPED), 0);
> +
> + wait_and_check_coredump_server(pid_coredump_server, _metadata, self);
> +
> + ASSERT_EQ(stat("/tmp/coredump.file", &st), 0);
> + ASSERT_GT(st.st_size, 0);
> + system("file /tmp/coredump.file");
> +}
> +
> +TEST_F(coredump, socket_request_userspace)
> +{
> + int pidfd, ret, status;
> + pid_t pid, pid_coredump_server;
> + struct pidfd_info info = {};
> + int ipc_sockets[2];
> + char c;
> +
> + ASSERT_TRUE(set_core_pattern("@@/tmp/coredump.socket"));
> +
> + ret = socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, ipc_sockets);
> + ASSERT_EQ(ret, 0);
> +
> + pid_coredump_server = fork();
> + ASSERT_GE(pid_coredump_server, 0);
> + if (pid_coredump_server == 0) {
> + struct coredump_req req = {};
> + int fd_server = -1, fd_coredump = -1, fd_peer_pidfd = -1;
> + int exit_code = EXIT_FAILURE;
> +
> + close(ipc_sockets[0]);
> +
> + fd_server = create_and_listen_unix_socket("/tmp/coredump.socket");
> + if (fd_server < 0)
> + goto out;
> +
> + if (write_nointr(ipc_sockets[1], "1", 1) < 0)
> + goto out;
> +
> + close(ipc_sockets[1]);
> +
> + fd_coredump = accept4(fd_server, NULL, NULL, SOCK_CLOEXEC);
> + if (fd_coredump < 0)
> + goto out;
> +
> + fd_peer_pidfd = get_peer_pidfd(fd_coredump);
> + if (fd_peer_pidfd < 0)
> + goto out;
> +
> + if (!get_pidfd_info(fd_peer_pidfd, &info))
> + goto out;
> +
> + if (!(info.mask & PIDFD_INFO_COREDUMP))
> + goto out;
> +
> + if (!(info.coredump_mask & PIDFD_COREDUMPED))
> + goto out;
> +
> + if (!read_coredump_req(fd_coredump, &req))
> + goto out;
> +
> + if (!check_coredump_req(&req, COREDUMP_ACK_SIZE_VER0,
> + COREDUMP_KERNEL | COREDUMP_USERSPACE |
> + COREDUMP_REJECT | COREDUMP_WAIT))
> + goto out;
> +
> + if (!send_coredump_ack(fd_coredump, &req,
> + COREDUMP_USERSPACE | COREDUMP_WAIT, 0))
> + goto out;
> +
> + if (!read_marker(fd_coredump, COREDUMP_MARK_REQACK))
> + goto out;
> +
> + for (;;) {
> + char buffer[4096];
> + ssize_t bytes_read;
> +
> + bytes_read = read(fd_coredump, buffer, sizeof(buffer));
> + if (bytes_read > 0)
> + goto out;
> +
> + if (bytes_read < 0)
> + goto out;
> +
> + if (bytes_read == 0)
> + break;
> + }
> +
> + exit_code = EXIT_SUCCESS;
> +out:
> + if (fd_peer_pidfd >= 0)
> + close(fd_peer_pidfd);
> + if (fd_coredump >= 0)
> + close(fd_coredump);
> + if (fd_server >= 0)
> + close(fd_server);
> + _exit(exit_code);
> + }
> + self->pid_coredump_server = pid_coredump_server;
> +
> + EXPECT_EQ(close(ipc_sockets[1]), 0);
> + ASSERT_EQ(read_nointr(ipc_sockets[0], &c, 1), 1);
> + EXPECT_EQ(close(ipc_sockets[0]), 0);
> +
> + pid = fork();
> + ASSERT_GE(pid, 0);
> + if (pid == 0)
> + crashing_child();
> +
> + pidfd = sys_pidfd_open(pid, 0);
> + ASSERT_GE(pidfd, 0);
> +
> + waitpid(pid, &status, 0);
> + ASSERT_TRUE(WIFSIGNALED(status));
> + ASSERT_TRUE(WCOREDUMP(status));
> +
> + ASSERT_TRUE(get_pidfd_info(pidfd, &info));
> + ASSERT_GT((info.mask & PIDFD_INFO_COREDUMP), 0);
> + ASSERT_GT((info.coredump_mask & PIDFD_COREDUMPED), 0);
> +
> + wait_and_check_coredump_server(pid_coredump_server, _metadata, self);
> +}
> +
> +TEST_F(coredump, socket_request_reject)
> +{
> + int pidfd, ret, status;
> + pid_t pid, pid_coredump_server;
> + struct pidfd_info info = {};
> + int ipc_sockets[2];
> + char c;
> +
> + ASSERT_TRUE(set_core_pattern("@@/tmp/coredump.socket"));
> +
> + ret = socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, ipc_sockets);
> + ASSERT_EQ(ret, 0);
> +
> + pid_coredump_server = fork();
> + ASSERT_GE(pid_coredump_server, 0);
> + if (pid_coredump_server == 0) {
> + struct coredump_req req = {};
> + int fd_server = -1, fd_coredump = -1, fd_peer_pidfd = -1;
> + int exit_code = EXIT_FAILURE;
> +
> + close(ipc_sockets[0]);
> +
> + fd_server = create_and_listen_unix_socket("/tmp/coredump.socket");
> + if (fd_server < 0)
> + goto out;
> +
> + if (write_nointr(ipc_sockets[1], "1", 1) < 0)
> + goto out;
> +
> + close(ipc_sockets[1]);
> +
> + fd_coredump = accept4(fd_server, NULL, NULL, SOCK_CLOEXEC);
> + if (fd_coredump < 0)
> + goto out;
> +
> + fd_peer_pidfd = get_peer_pidfd(fd_coredump);
> + if (fd_peer_pidfd < 0)
> + goto out;
> +
> + if (!get_pidfd_info(fd_peer_pidfd, &info))
> + goto out;
> +
> + if (!(info.mask & PIDFD_INFO_COREDUMP))
> + goto out;
> +
> + if (!(info.coredump_mask & PIDFD_COREDUMPED))
> + goto out;
> +
> + if (!read_coredump_req(fd_coredump, &req))
> + goto out;
> +
> + if (!check_coredump_req(&req, COREDUMP_ACK_SIZE_VER0,
> + COREDUMP_KERNEL | COREDUMP_USERSPACE |
> + COREDUMP_REJECT | COREDUMP_WAIT))
> + goto out;
> +
> + if (!send_coredump_ack(fd_coredump, &req,
> + COREDUMP_REJECT | COREDUMP_WAIT, 0))
> + goto out;
> +
> + if (!read_marker(fd_coredump, COREDUMP_MARK_REQACK))
> + goto out;
> +
> + for (;;) {
> + char buffer[4096];
> + ssize_t bytes_read;
> +
> + bytes_read = read(fd_coredump, buffer, sizeof(buffer));
> + if (bytes_read > 0)
> + goto out;
> +
> + if (bytes_read < 0)
> + goto out;
> +
> + if (bytes_read == 0)
> + break;
> + }
> +
> + exit_code = EXIT_SUCCESS;
> +out:
> + if (fd_peer_pidfd >= 0)
> + close(fd_peer_pidfd);
> + if (fd_coredump >= 0)
> + close(fd_coredump);
> + if (fd_server >= 0)
> + close(fd_server);
> + _exit(exit_code);
> + }
> + self->pid_coredump_server = pid_coredump_server;
> +
> + EXPECT_EQ(close(ipc_sockets[1]), 0);
> + ASSERT_EQ(read_nointr(ipc_sockets[0], &c, 1), 1);
> + EXPECT_EQ(close(ipc_sockets[0]), 0);
> +
> + pid = fork();
> + ASSERT_GE(pid, 0);
> + if (pid == 0)
> + crashing_child();
> +
> + pidfd = sys_pidfd_open(pid, 0);
> + ASSERT_GE(pidfd, 0);
> +
> + waitpid(pid, &status, 0);
> + ASSERT_TRUE(WIFSIGNALED(status));
> + ASSERT_FALSE(WCOREDUMP(status));
> +
> + ASSERT_TRUE(get_pidfd_info(pidfd, &info));
> + ASSERT_GT((info.mask & PIDFD_INFO_COREDUMP), 0);
> + ASSERT_GT((info.coredump_mask & PIDFD_COREDUMPED), 0);
> +
> + wait_and_check_coredump_server(pid_coredump_server, _metadata, self);
> +}
> +
> +TEST_F(coredump, socket_request_invalid_flag_combination)
> +{
> + int pidfd, ret, status;
> + pid_t pid, pid_coredump_server;
> + struct pidfd_info info = {};
> + int ipc_sockets[2];
> + char c;
> +
> + ASSERT_TRUE(set_core_pattern("@@/tmp/coredump.socket"));
> +
> + ret = socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, ipc_sockets);
> + ASSERT_EQ(ret, 0);
> +
> + pid_coredump_server = fork();
> + ASSERT_GE(pid_coredump_server, 0);
> + if (pid_coredump_server == 0) {
> + struct coredump_req req = {};
> + int fd_server = -1, fd_coredump = -1, fd_peer_pidfd = -1;
> + int exit_code = EXIT_FAILURE;
> +
> + close(ipc_sockets[0]);
> +
> + fd_server = create_and_listen_unix_socket("/tmp/coredump.socket");
> + if (fd_server < 0)
> + goto out;
> +
> + if (write_nointr(ipc_sockets[1], "1", 1) < 0)
> + goto out;
> +
> + close(ipc_sockets[1]);
> +
> + fd_coredump = accept4(fd_server, NULL, NULL, SOCK_CLOEXEC);
> + if (fd_coredump < 0)
> + goto out;
> +
> + fd_peer_pidfd = get_peer_pidfd(fd_coredump);
> + if (fd_peer_pidfd < 0)
> + goto out;
> +
> + if (!get_pidfd_info(fd_peer_pidfd, &info))
> + goto out;
> +
> + if (!(info.mask & PIDFD_INFO_COREDUMP))
> + goto out;
> +
> + if (!(info.coredump_mask & PIDFD_COREDUMPED))
> + goto out;
> +
> + if (!read_coredump_req(fd_coredump, &req))
> + goto out;
> +
> + if (!check_coredump_req(&req, COREDUMP_ACK_SIZE_VER0,
> + COREDUMP_KERNEL | COREDUMP_USERSPACE |
> + COREDUMP_REJECT | COREDUMP_WAIT))
> + goto out;
> +
> + if (!send_coredump_ack(fd_coredump, &req,
> + COREDUMP_KERNEL | COREDUMP_REJECT | COREDUMP_WAIT, 0))
> + goto out;
> +
> + if (!read_marker(fd_coredump, COREDUMP_MARK_CONFLICTING))
> + goto out;
> +
> + exit_code = EXIT_SUCCESS;
> +out:
> + if (fd_peer_pidfd >= 0)
> + close(fd_peer_pidfd);
> + if (fd_coredump >= 0)
> + close(fd_coredump);
> + if (fd_server >= 0)
> + close(fd_server);
> + _exit(exit_code);
> + }
> + self->pid_coredump_server = pid_coredump_server;
> +
> + EXPECT_EQ(close(ipc_sockets[1]), 0);
> + ASSERT_EQ(read_nointr(ipc_sockets[0], &c, 1), 1);
> + EXPECT_EQ(close(ipc_sockets[0]), 0);
> +
> + pid = fork();
> + ASSERT_GE(pid, 0);
> + if (pid == 0)
> + crashing_child();
> +
> + pidfd = sys_pidfd_open(pid, 0);
> + ASSERT_GE(pidfd, 0);
> +
> + waitpid(pid, &status, 0);
> + ASSERT_TRUE(WIFSIGNALED(status));
> + ASSERT_FALSE(WCOREDUMP(status));
> +
> + ASSERT_TRUE(get_pidfd_info(pidfd, &info));
> + ASSERT_GT((info.mask & PIDFD_INFO_COREDUMP), 0);
> + ASSERT_GT((info.coredump_mask & PIDFD_COREDUMPED), 0);
> +
> + wait_and_check_coredump_server(pid_coredump_server, _metadata, self);
> +}
> +
> +TEST_F(coredump, socket_request_unknown_flag)
> +{
> + int pidfd, ret, status;
> + pid_t pid, pid_coredump_server;
> + struct pidfd_info info = {};
> + int ipc_sockets[2];
> + char c;
> +
> + ASSERT_TRUE(set_core_pattern("@@/tmp/coredump.socket"));
> +
> + ret = socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, ipc_sockets);
> + ASSERT_EQ(ret, 0);
> +
> + pid_coredump_server = fork();
> + ASSERT_GE(pid_coredump_server, 0);
> + if (pid_coredump_server == 0) {
> + struct coredump_req req = {};
> + int fd_server = -1, fd_coredump = -1, fd_peer_pidfd = -1;
> + int exit_code = EXIT_FAILURE;
> +
> + close(ipc_sockets[0]);
> +
> + fd_server = create_and_listen_unix_socket("/tmp/coredump.socket");
> + if (fd_server < 0)
> + goto out;
> +
> + if (write_nointr(ipc_sockets[1], "1", 1) < 0)
> + goto out;
> +
> + close(ipc_sockets[1]);
> +
> + fd_coredump = accept4(fd_server, NULL, NULL, SOCK_CLOEXEC);
> + if (fd_coredump < 0)
> + goto out;
> +
> + fd_peer_pidfd = get_peer_pidfd(fd_coredump);
> + if (fd_peer_pidfd < 0)
> + goto out;
> +
> + if (!get_pidfd_info(fd_peer_pidfd, &info))
> + goto out;
> +
> + if (!(info.mask & PIDFD_INFO_COREDUMP))
> + goto out;
> +
> + if (!(info.coredump_mask & PIDFD_COREDUMPED))
> + goto out;
> +
> + if (!read_coredump_req(fd_coredump, &req))
> + goto out;
> +
> + if (!check_coredump_req(&req, COREDUMP_ACK_SIZE_VER0,
> + COREDUMP_KERNEL | COREDUMP_USERSPACE |
> + COREDUMP_REJECT | COREDUMP_WAIT))
> + goto out;
> +
> + if (!send_coredump_ack(fd_coredump, &req, (1ULL << 63), 0))
> + goto out;
> +
> + if (!read_marker(fd_coredump, COREDUMP_MARK_UNSUPPORTED))
> + goto out;
> +
> + exit_code = EXIT_SUCCESS;
> +out:
> + if (fd_peer_pidfd >= 0)
> + close(fd_peer_pidfd);
> + if (fd_coredump >= 0)
> + close(fd_coredump);
> + if (fd_server >= 0)
> + close(fd_server);
> + _exit(exit_code);
> + }
> + self->pid_coredump_server = pid_coredump_server;
> +
> + EXPECT_EQ(close(ipc_sockets[1]), 0);
> + ASSERT_EQ(read_nointr(ipc_sockets[0], &c, 1), 1);
> + EXPECT_EQ(close(ipc_sockets[0]), 0);
> +
> + pid = fork();
> + ASSERT_GE(pid, 0);
> + if (pid == 0)
> + crashing_child();
> +
> + pidfd = sys_pidfd_open(pid, 0);
> + ASSERT_GE(pidfd, 0);
> +
> + waitpid(pid, &status, 0);
> + ASSERT_TRUE(WIFSIGNALED(status));
> + ASSERT_FALSE(WCOREDUMP(status));
> +
> + ASSERT_TRUE(get_pidfd_info(pidfd, &info));
> + ASSERT_GT((info.mask & PIDFD_INFO_COREDUMP), 0);
> + ASSERT_GT((info.coredump_mask & PIDFD_COREDUMPED), 0);
> +
> + wait_and_check_coredump_server(pid_coredump_server, _metadata, self);
> +}
> +
> +TEST_F(coredump, socket_request_invalid_size_small)
> +{
> + int pidfd, ret, status;
> + pid_t pid, pid_coredump_server;
> + struct pidfd_info info = {};
> + int ipc_sockets[2];
> + char c;
> +
> + ASSERT_TRUE(set_core_pattern("@@/tmp/coredump.socket"));
> +
> + ret = socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, ipc_sockets);
> + ASSERT_EQ(ret, 0);
> +
> + pid_coredump_server = fork();
> + ASSERT_GE(pid_coredump_server, 0);
> + if (pid_coredump_server == 0) {
> + struct coredump_req req = {};
> + int fd_server = -1, fd_coredump = -1, fd_peer_pidfd = -1;
> + int exit_code = EXIT_FAILURE;
> +
> + close(ipc_sockets[0]);
> +
> + fd_server = create_and_listen_unix_socket("/tmp/coredump.socket");
> + if (fd_server < 0)
> + goto out;
> +
> + if (write_nointr(ipc_sockets[1], "1", 1) < 0)
> + goto out;
> +
> + close(ipc_sockets[1]);
> +
> + fd_coredump = accept4(fd_server, NULL, NULL, SOCK_CLOEXEC);
> + if (fd_coredump < 0)
> + goto out;
> +
> + fd_peer_pidfd = get_peer_pidfd(fd_coredump);
> + if (fd_peer_pidfd < 0)
> + goto out;
> +
> + if (!get_pidfd_info(fd_peer_pidfd, &info))
> + goto out;
> +
> + if (!(info.mask & PIDFD_INFO_COREDUMP))
> + goto out;
> +
> + if (!(info.coredump_mask & PIDFD_COREDUMPED))
> + goto out;
> +
> + if (!read_coredump_req(fd_coredump, &req))
> + goto out;
> +
> + if (!check_coredump_req(&req, COREDUMP_ACK_SIZE_VER0,
> + COREDUMP_KERNEL | COREDUMP_USERSPACE |
> + COREDUMP_REJECT | COREDUMP_WAIT))
> + goto out;
> +
> + if (!send_coredump_ack(fd_coredump, &req,
> + COREDUMP_REJECT | COREDUMP_WAIT,
> + COREDUMP_ACK_SIZE_VER0 / 2))
> + goto out;
> +
> + if (!read_marker(fd_coredump, COREDUMP_MARK_MINSIZE))
> + goto out;
> +
> + exit_code = EXIT_SUCCESS;
> +out:
> + if (fd_peer_pidfd >= 0)
> + close(fd_peer_pidfd);
> + if (fd_coredump >= 0)
> + close(fd_coredump);
> + if (fd_server >= 0)
> + close(fd_server);
> + _exit(exit_code);
> + }
> + self->pid_coredump_server = pid_coredump_server;
> +
> + EXPECT_EQ(close(ipc_sockets[1]), 0);
> + ASSERT_EQ(read_nointr(ipc_sockets[0], &c, 1), 1);
> + EXPECT_EQ(close(ipc_sockets[0]), 0);
> +
> + pid = fork();
> + ASSERT_GE(pid, 0);
> + if (pid == 0)
> + crashing_child();
> +
> + pidfd = sys_pidfd_open(pid, 0);
> + ASSERT_GE(pidfd, 0);
> +
> + waitpid(pid, &status, 0);
> + ASSERT_TRUE(WIFSIGNALED(status));
> + ASSERT_FALSE(WCOREDUMP(status));
> +
> + ASSERT_TRUE(get_pidfd_info(pidfd, &info));
> + ASSERT_GT((info.mask & PIDFD_INFO_COREDUMP), 0);
> + ASSERT_GT((info.coredump_mask & PIDFD_COREDUMPED), 0);
> +
> + wait_and_check_coredump_server(pid_coredump_server, _metadata, self);
> +}
> +
> +TEST_F(coredump, socket_request_invalid_size_large)
> +{
> + int pidfd, ret, status;
> + pid_t pid, pid_coredump_server;
> + struct pidfd_info info = {};
> + int ipc_sockets[2];
> + char c;
> +
> + ASSERT_TRUE(set_core_pattern("@@/tmp/coredump.socket"));
> +
> + ret = socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, ipc_sockets);
> + ASSERT_EQ(ret, 0);
> +
> + pid_coredump_server = fork();
> + ASSERT_GE(pid_coredump_server, 0);
> + if (pid_coredump_server == 0) {
> + struct coredump_req req = {};
> + int fd_server = -1, fd_coredump = -1, fd_peer_pidfd = -1;
> + int exit_code = EXIT_FAILURE;
> +
> + close(ipc_sockets[0]);
> +
> + fd_server = create_and_listen_unix_socket("/tmp/coredump.socket");
> + if (fd_server < 0)
> + goto out;
> +
> + if (write_nointr(ipc_sockets[1], "1", 1) < 0)
> + goto out;
> +
> + close(ipc_sockets[1]);
> +
> + fd_coredump = accept4(fd_server, NULL, NULL, SOCK_CLOEXEC);
> + if (fd_coredump < 0)
> + goto out;
> +
> + fd_peer_pidfd = get_peer_pidfd(fd_coredump);
> + if (fd_peer_pidfd < 0)
> + goto out;
> +
> + if (!get_pidfd_info(fd_peer_pidfd, &info))
> + goto out;
> +
> + if (!(info.mask & PIDFD_INFO_COREDUMP))
> + goto out;
> +
> + if (!(info.coredump_mask & PIDFD_COREDUMPED))
> + goto out;
> +
> + if (!read_coredump_req(fd_coredump, &req))
> + goto out;
> +
> + if (!check_coredump_req(&req, COREDUMP_ACK_SIZE_VER0,
> + COREDUMP_KERNEL | COREDUMP_USERSPACE |
> + COREDUMP_REJECT | COREDUMP_WAIT))
> + goto out;
> +
> + if (!send_coredump_ack(fd_coredump, &req,
> + COREDUMP_REJECT | COREDUMP_WAIT,
> + COREDUMP_ACK_SIZE_VER0 + PAGE_SIZE))
> + goto out;
> +
> + if (!read_marker(fd_coredump, COREDUMP_MARK_MAXSIZE))
> + goto out;
> +
> + exit_code = EXIT_SUCCESS;
> +out:
> + if (fd_peer_pidfd >= 0)
> + close(fd_peer_pidfd);
> + if (fd_coredump >= 0)
> + close(fd_coredump);
> + if (fd_server >= 0)
> + close(fd_server);
> + _exit(exit_code);
> + }
> + self->pid_coredump_server = pid_coredump_server;
> +
> + EXPECT_EQ(close(ipc_sockets[1]), 0);
> + ASSERT_EQ(read_nointr(ipc_sockets[0], &c, 1), 1);
> + EXPECT_EQ(close(ipc_sockets[0]), 0);
> +
> + pid = fork();
> + ASSERT_GE(pid, 0);
> + if (pid == 0)
> + crashing_child();
> +
> + pidfd = sys_pidfd_open(pid, 0);
> + ASSERT_GE(pidfd, 0);
> +
> + waitpid(pid, &status, 0);
> + ASSERT_TRUE(WIFSIGNALED(status));
> + ASSERT_FALSE(WCOREDUMP(status));
> +
> + ASSERT_TRUE(get_pidfd_info(pidfd, &info));
> + ASSERT_GT((info.mask & PIDFD_INFO_COREDUMP), 0);
> + ASSERT_GT((info.coredump_mask & PIDFD_COREDUMPED), 0);
> +
> + wait_and_check_coredump_server(pid_coredump_server, _metadata, self);
> +}
> +
> +/*
> + * Test: PIDFD_INFO_COREDUMP_SIGNAL via socket coredump with SIGSEGV
> + *
> + * Verify that when using socket-based coredump protocol,
> + * the coredump_signal field is correctly exposed as SIGSEGV.
> + */
> +TEST_F(coredump, socket_coredump_signal_sigsegv)
> +{
> + int pidfd, ret, status;
> + pid_t pid, pid_coredump_server;
> + struct pidfd_info info = {};
> + int ipc_sockets[2];
> + char c;
> +
> + ASSERT_TRUE(set_core_pattern("@@/tmp/coredump.socket"));
> +
> + ret = socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, ipc_sockets);
> + ASSERT_EQ(ret, 0);
> +
> + pid_coredump_server = fork();
> + ASSERT_GE(pid_coredump_server, 0);
> + if (pid_coredump_server == 0) {
> + struct coredump_req req = {};
> + int fd_server = -1, fd_coredump = -1, fd_peer_pidfd = -1;
> + int exit_code = EXIT_FAILURE;
> +
> + close(ipc_sockets[0]);
> +
> + fd_server = create_and_listen_unix_socket("/tmp/coredump.socket");
> + if (fd_server < 0)
> + goto out;
> +
> + if (write_nointr(ipc_sockets[1], "1", 1) < 0)
> + goto out;
> +
> + close(ipc_sockets[1]);
> +
> + fd_coredump = accept4(fd_server, NULL, NULL, SOCK_CLOEXEC);
> + if (fd_coredump < 0)
> + goto out;
> +
> + fd_peer_pidfd = get_peer_pidfd(fd_coredump);
> + if (fd_peer_pidfd < 0)
> + goto out;
> +
> + if (!get_pidfd_info(fd_peer_pidfd, &info))
> + goto out;
> +
> + if (!(info.mask & PIDFD_INFO_COREDUMP))
> + goto out;
> +
> + if (!(info.coredump_mask & PIDFD_COREDUMPED))
> + goto out;
> +
> + /* Verify coredump_signal is available and correct */
> + if (!(info.mask & PIDFD_INFO_COREDUMP_SIGNAL))
> + goto out;
> +
> + if (info.coredump_signal != SIGSEGV)
> + goto out;
> +
> + if (!read_coredump_req(fd_coredump, &req))
> + goto out;
> +
> + if (!send_coredump_ack(fd_coredump, &req,
> + COREDUMP_REJECT | COREDUMP_WAIT, 0))
> + goto out;
> +
> + if (!read_marker(fd_coredump, COREDUMP_MARK_REQACK))
> + goto out;
> +
> + exit_code = EXIT_SUCCESS;
> +out:
> + if (fd_peer_pidfd >= 0)
> + close(fd_peer_pidfd);
> + if (fd_coredump >= 0)
> + close(fd_coredump);
> + if (fd_server >= 0)
> + close(fd_server);
> + _exit(exit_code);
> + }
> + self->pid_coredump_server = pid_coredump_server;
> +
> + EXPECT_EQ(close(ipc_sockets[1]), 0);
> + ASSERT_EQ(read_nointr(ipc_sockets[0], &c, 1), 1);
> + EXPECT_EQ(close(ipc_sockets[0]), 0);
> +
> + pid = fork();
> + ASSERT_GE(pid, 0);
> + if (pid == 0)
> + crashing_child();
> +
> + pidfd = sys_pidfd_open(pid, 0);
> + ASSERT_GE(pidfd, 0);
> +
> + waitpid(pid, &status, 0);
> + ASSERT_TRUE(WIFSIGNALED(status));
> + ASSERT_EQ(WTERMSIG(status), SIGSEGV);
> +
> + ASSERT_TRUE(get_pidfd_info(pidfd, &info));
> + ASSERT_TRUE(!!(info.mask & PIDFD_INFO_COREDUMP));
> + ASSERT_TRUE(!!(info.mask & PIDFD_INFO_COREDUMP_SIGNAL));
> + ASSERT_EQ(info.coredump_signal, SIGSEGV);
> +
> + wait_and_check_coredump_server(pid_coredump_server, _metadata, self);
> +}
> +
> +/*
> + * Test: PIDFD_INFO_COREDUMP_SIGNAL via socket coredump with SIGABRT
> + *
> + * Verify that when using socket-based coredump protocol,
> + * the coredump_signal field is correctly exposed as SIGABRT.
> + */
> +TEST_F(coredump, socket_coredump_signal_sigabrt)
> +{
> + int pidfd, ret, status;
> + pid_t pid, pid_coredump_server;
> + struct pidfd_info info = {};
> + int ipc_sockets[2];
> + char c;
> +
> + ASSERT_TRUE(set_core_pattern("@@/tmp/coredump.socket"));
> +
> + ret = socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, ipc_sockets);
> + ASSERT_EQ(ret, 0);
> +
> + pid_coredump_server = fork();
> + ASSERT_GE(pid_coredump_server, 0);
> + if (pid_coredump_server == 0) {
> + struct coredump_req req = {};
> + int fd_server = -1, fd_coredump = -1, fd_peer_pidfd = -1;
> + int exit_code = EXIT_FAILURE;
> +
> + close(ipc_sockets[0]);
> +
> + fd_server = create_and_listen_unix_socket("/tmp/coredump.socket");
> + if (fd_server < 0)
> + goto out;
> +
> + if (write_nointr(ipc_sockets[1], "1", 1) < 0)
> + goto out;
> +
> + close(ipc_sockets[1]);
> +
> + fd_coredump = accept4(fd_server, NULL, NULL, SOCK_CLOEXEC);
> + if (fd_coredump < 0)
> + goto out;
> +
> + fd_peer_pidfd = get_peer_pidfd(fd_coredump);
> + if (fd_peer_pidfd < 0)
> + goto out;
> +
> + if (!get_pidfd_info(fd_peer_pidfd, &info))
> + goto out;
> +
> + if (!(info.mask & PIDFD_INFO_COREDUMP))
> + goto out;
> +
> + if (!(info.coredump_mask & PIDFD_COREDUMPED))
> + goto out;
> +
> + /* Verify coredump_signal is available and correct */
> + if (!(info.mask & PIDFD_INFO_COREDUMP_SIGNAL))
> + goto out;
> +
> + if (info.coredump_signal != SIGABRT)
> + goto out;
> +
> + if (!read_coredump_req(fd_coredump, &req))
> + goto out;
> +
> + if (!send_coredump_ack(fd_coredump, &req,
> + COREDUMP_REJECT | COREDUMP_WAIT, 0))
> + goto out;
> +
> + if (!read_marker(fd_coredump, COREDUMP_MARK_REQACK))
> + goto out;
> +
> + exit_code = EXIT_SUCCESS;
> +out:
> + if (fd_peer_pidfd >= 0)
> + close(fd_peer_pidfd);
> + if (fd_coredump >= 0)
> + close(fd_coredump);
> + if (fd_server >= 0)
> + close(fd_server);
> + _exit(exit_code);
> + }
> + self->pid_coredump_server = pid_coredump_server;
> +
> + EXPECT_EQ(close(ipc_sockets[1]), 0);
> + ASSERT_EQ(read_nointr(ipc_sockets[0], &c, 1), 1);
> + EXPECT_EQ(close(ipc_sockets[0]), 0);
> +
> + pid = fork();
> + ASSERT_GE(pid, 0);
> + if (pid == 0)
> + abort();
> +
> + pidfd = sys_pidfd_open(pid, 0);
> + ASSERT_GE(pidfd, 0);
> +
> + waitpid(pid, &status, 0);
> + ASSERT_TRUE(WIFSIGNALED(status));
> + ASSERT_EQ(WTERMSIG(status), SIGABRT);
> +
> + ASSERT_TRUE(get_pidfd_info(pidfd, &info));
> + ASSERT_TRUE(!!(info.mask & PIDFD_INFO_COREDUMP));
> + ASSERT_TRUE(!!(info.mask & PIDFD_INFO_COREDUMP_SIGNAL));
> + ASSERT_EQ(info.coredump_signal, SIGABRT);
> +
> + wait_and_check_coredump_server(pid_coredump_server, _metadata, self);
> +}
> +
> +TEST_F_TIMEOUT(coredump, socket_multiple_crashing_coredumps, 500)
> +{
> + int pidfd[NUM_CRASHING_COREDUMPS], status[NUM_CRASHING_COREDUMPS];
> + pid_t pid[NUM_CRASHING_COREDUMPS], pid_coredump_server;
> + struct pidfd_info info = {};
> + int ipc_sockets[2];
> + char c;
> +
> + ASSERT_TRUE(set_core_pattern("@@/tmp/coredump.socket"));
> +
> + ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, ipc_sockets), 0);
> +
> + pid_coredump_server = fork();
> + ASSERT_GE(pid_coredump_server, 0);
> + if (pid_coredump_server == 0) {
> + int fd_server = -1, fd_coredump = -1, fd_peer_pidfd = -1, fd_core_file = -1;
> + int exit_code = EXIT_FAILURE;
> + struct coredump_req req = {};
> +
> + close(ipc_sockets[0]);
> + fd_server = create_and_listen_unix_socket("/tmp/coredump.socket");
> + if (fd_server < 0) {
> + fprintf(stderr, "Failed to create and listen on unix socket\n");
> + goto out;
> + }
> +
> + if (write_nointr(ipc_sockets[1], "1", 1) < 0) {
> + fprintf(stderr, "Failed to notify parent via ipc socket\n");
> + goto out;
> + }
> + close(ipc_sockets[1]);
> +
> + for (int i = 0; i < NUM_CRASHING_COREDUMPS; i++) {
> + fd_coredump = accept4(fd_server, NULL, NULL, SOCK_CLOEXEC);
> + if (fd_coredump < 0) {
> + fprintf(stderr, "accept4 failed: %m\n");
> + goto out;
> + }
> +
> + fd_peer_pidfd = get_peer_pidfd(fd_coredump);
> + if (fd_peer_pidfd < 0) {
> + fprintf(stderr, "get_peer_pidfd failed for fd %d: %m\n", fd_coredump);
> + goto out;
> + }
> +
> + if (!get_pidfd_info(fd_peer_pidfd, &info)) {
> + fprintf(stderr, "get_pidfd_info failed for fd %d\n", fd_peer_pidfd);
> + goto out;
> + }
> +
> + if (!(info.mask & PIDFD_INFO_COREDUMP)) {
> + fprintf(stderr, "pidfd info missing PIDFD_INFO_COREDUMP for fd %d\n", fd_peer_pidfd);
> + goto out;
> + }
> + if (!(info.coredump_mask & PIDFD_COREDUMPED)) {
> + fprintf(stderr, "pidfd info missing PIDFD_COREDUMPED for fd %d\n", fd_peer_pidfd);
> + goto out;
> + }
> +
> + if (!read_coredump_req(fd_coredump, &req)) {
> + fprintf(stderr, "read_coredump_req failed for fd %d\n", fd_coredump);
> + goto out;
> + }
> +
> + if (!check_coredump_req(&req, COREDUMP_ACK_SIZE_VER0,
> + COREDUMP_KERNEL | COREDUMP_USERSPACE |
> + COREDUMP_REJECT | COREDUMP_WAIT)) {
> + fprintf(stderr, "check_coredump_req failed for fd %d\n", fd_coredump);
> + goto out;
> + }
> +
> + if (!send_coredump_ack(fd_coredump, &req,
> + COREDUMP_KERNEL | COREDUMP_WAIT, 0)) {
> + fprintf(stderr, "send_coredump_ack failed for fd %d\n", fd_coredump);
> + goto out;
> + }
> +
> + if (!read_marker(fd_coredump, COREDUMP_MARK_REQACK)) {
> + fprintf(stderr, "read_marker failed for fd %d\n", fd_coredump);
> + goto out;
> + }
> +
> + fd_core_file = open_coredump_tmpfile(self->fd_tmpfs_detached);
> + if (fd_core_file < 0) {
> + fprintf(stderr, "%m - open_coredump_tmpfile failed for fd %d\n", fd_coredump);
> + goto out;
> + }
> +
> + for (;;) {
> + char buffer[4096];
> + ssize_t bytes_read, bytes_write;
> +
> + bytes_read = read(fd_coredump, buffer, sizeof(buffer));
> + if (bytes_read < 0) {
> + fprintf(stderr, "read failed for fd %d: %m\n", fd_coredump);
> + goto out;
> + }
> +
> + if (bytes_read == 0)
> + break;
> +
> + bytes_write = write(fd_core_file, buffer, bytes_read);
> + if (bytes_read != bytes_write) {
> + fprintf(stderr, "write failed for fd %d: %m\n", fd_core_file);
> + goto out;
> + }
> + }
> +
> + close(fd_core_file);
> + close(fd_peer_pidfd);
> + close(fd_coredump);
> + fd_peer_pidfd = -1;
> + fd_coredump = -1;
> + }
> +
> + exit_code = EXIT_SUCCESS;
> +out:
> + if (fd_core_file >= 0)
> + close(fd_core_file);
> + if (fd_peer_pidfd >= 0)
> + close(fd_peer_pidfd);
> + if (fd_coredump >= 0)
> + close(fd_coredump);
> + if (fd_server >= 0)
> + close(fd_server);
> + _exit(exit_code);
> + }
> + self->pid_coredump_server = pid_coredump_server;
> +
> + EXPECT_EQ(close(ipc_sockets[1]), 0);
> + ASSERT_EQ(read_nointr(ipc_sockets[0], &c, 1), 1);
> + EXPECT_EQ(close(ipc_sockets[0]), 0);
> +
> + for (int i = 0; i < NUM_CRASHING_COREDUMPS; i++) {
> + pid[i] = fork();
> + ASSERT_GE(pid[i], 0);
> + if (pid[i] == 0)
> + crashing_child();
> + pidfd[i] = sys_pidfd_open(pid[i], 0);
> + ASSERT_GE(pidfd[i], 0);
> + }
> +
> + for (int i = 0; i < NUM_CRASHING_COREDUMPS; i++) {
> + waitpid(pid[i], &status[i], 0);
> + ASSERT_TRUE(WIFSIGNALED(status[i]));
> + ASSERT_TRUE(WCOREDUMP(status[i]));
> + }
> +
> + for (int i = 0; i < NUM_CRASHING_COREDUMPS; i++) {
> + info.mask = PIDFD_INFO_EXIT | PIDFD_INFO_COREDUMP;
> + ASSERT_EQ(ioctl(pidfd[i], PIDFD_GET_INFO, &info), 0);
> + ASSERT_GT((info.mask & PIDFD_INFO_COREDUMP), 0);
> + ASSERT_GT((info.coredump_mask & PIDFD_COREDUMPED), 0);
> + }
> +
> + wait_and_check_coredump_server(pid_coredump_server, _metadata, self);
> +}
> +
> +TEST_F_TIMEOUT(coredump, socket_multiple_crashing_coredumps_epoll_workers, 500)
> +{
> + int pidfd[NUM_CRASHING_COREDUMPS], status[NUM_CRASHING_COREDUMPS];
> + pid_t pid[NUM_CRASHING_COREDUMPS], pid_coredump_server, worker_pids[NUM_CRASHING_COREDUMPS];
> + struct pidfd_info info = {};
> + int ipc_sockets[2];
> + char c;
> +
> + ASSERT_TRUE(set_core_pattern("@@/tmp/coredump.socket"));
> + ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, ipc_sockets), 0);
> +
> + pid_coredump_server = fork();
> + ASSERT_GE(pid_coredump_server, 0);
> + if (pid_coredump_server == 0) {
> + int fd_server = -1, exit_code = EXIT_FAILURE, n_conns = 0;
> + fd_server = -1;
> + exit_code = EXIT_FAILURE;
> + n_conns = 0;
> + close(ipc_sockets[0]);
> + fd_server = create_and_listen_unix_socket("/tmp/coredump.socket");
> + if (fd_server < 0)
> + goto out;
> +
> + if (write_nointr(ipc_sockets[1], "1", 1) < 0)
> + goto out;
> + close(ipc_sockets[1]);
> +
> + while (n_conns < NUM_CRASHING_COREDUMPS) {
> + int fd_coredump = -1, fd_peer_pidfd = -1, fd_core_file = -1;
> + struct coredump_req req = {};
> + fd_coredump = accept4(fd_server, NULL, NULL, SOCK_CLOEXEC);
> + if (fd_coredump < 0) {
> + if (errno == EAGAIN || errno == EWOULDBLOCK)
> + continue;
> + goto out;
> + }
> + fd_peer_pidfd = get_peer_pidfd(fd_coredump);
> + if (fd_peer_pidfd < 0)
> + goto out;
> + if (!get_pidfd_info(fd_peer_pidfd, &info))
> + goto out;
> + if (!(info.mask & PIDFD_INFO_COREDUMP) || !(info.coredump_mask & PIDFD_COREDUMPED))
> + goto out;
> + if (!read_coredump_req(fd_coredump, &req))
> + goto out;
> + if (!check_coredump_req(&req, COREDUMP_ACK_SIZE_VER0,
> + COREDUMP_KERNEL | COREDUMP_USERSPACE |
> + COREDUMP_REJECT | COREDUMP_WAIT))
> + goto out;
> + if (!send_coredump_ack(fd_coredump, &req, COREDUMP_KERNEL | COREDUMP_WAIT, 0))
> + goto out;
> + if (!read_marker(fd_coredump, COREDUMP_MARK_REQACK))
> + goto out;
> + fd_core_file = open_coredump_tmpfile(self->fd_tmpfs_detached);
> + if (fd_core_file < 0)
> + goto out;
> + pid_t worker = fork();
> + if (worker == 0) {
> + close(fd_server);
> + process_coredump_worker(fd_coredump, fd_peer_pidfd, fd_core_file);
> + }
> + worker_pids[n_conns] = worker;
> + if (fd_coredump >= 0)
> + close(fd_coredump);
> + if (fd_peer_pidfd >= 0)
> + close(fd_peer_pidfd);
> + if (fd_core_file >= 0)
> + close(fd_core_file);
> + n_conns++;
> + }
> + exit_code = EXIT_SUCCESS;
> +out:
> + if (fd_server >= 0)
> + close(fd_server);
> +
> + // Reap all worker processes
> + for (int i = 0; i < n_conns; i++) {
> + int wstatus;
> + if (waitpid(worker_pids[i], &wstatus, 0) < 0) {
> + fprintf(stderr, "Failed to wait for worker %d: %m\n", worker_pids[i]);
> + } else if (WIFEXITED(wstatus) && WEXITSTATUS(wstatus) != EXIT_SUCCESS) {
> + fprintf(stderr, "Worker %d exited with error code %d\n", worker_pids[i], WEXITSTATUS(wstatus));
> + exit_code = EXIT_FAILURE;
> + }
> + }
> +
> + _exit(exit_code);
> + }
> + self->pid_coredump_server = pid_coredump_server;
> +
> + EXPECT_EQ(close(ipc_sockets[1]), 0);
> + ASSERT_EQ(read_nointr(ipc_sockets[0], &c, 1), 1);
> + EXPECT_EQ(close(ipc_sockets[0]), 0);
> +
> + for (int i = 0; i < NUM_CRASHING_COREDUMPS; i++) {
> + pid[i] = fork();
> + ASSERT_GE(pid[i], 0);
> + if (pid[i] == 0)
> + crashing_child();
> + pidfd[i] = sys_pidfd_open(pid[i], 0);
> + ASSERT_GE(pidfd[i], 0);
> + }
> +
> + for (int i = 0; i < NUM_CRASHING_COREDUMPS; i++) {
> + ASSERT_GE(waitpid(pid[i], &status[i], 0), 0);
> + ASSERT_TRUE(WIFSIGNALED(status[i]));
> + ASSERT_TRUE(WCOREDUMP(status[i]));
> + }
> +
> + for (int i = 0; i < NUM_CRASHING_COREDUMPS; i++) {
> + info.mask = PIDFD_INFO_EXIT | PIDFD_INFO_COREDUMP;
> + ASSERT_EQ(ioctl(pidfd[i], PIDFD_GET_INFO, &info), 0);
> + ASSERT_GT((info.mask & PIDFD_INFO_COREDUMP), 0);
> + ASSERT_GT((info.coredump_mask & PIDFD_COREDUMPED), 0);
> + }
> +
> + wait_and_check_coredump_server(pid_coredump_server, _metadata, self);
> +}
> +
> +TEST_HARNESS_MAIN
> diff --git a/tools/testing/selftests/coredump/coredump_socket_test.c b/tools/testing/selftests/coredump/coredump_socket_test.c
> new file mode 100644
> index 000000000000..d5ad0e696ab3
> --- /dev/null
> +++ b/tools/testing/selftests/coredump/coredump_socket_test.c
> @@ -0,0 +1,394 @@
> +// SPDX-License-Identifier: GPL-2.0
> +
> +#include <sys/stat.h>
> +#include <sys/epoll.h>
> +#include <sys/socket.h>
> +#include <sys/un.h>
> +
> +#include "coredump_test.h"
> +
> +FIXTURE_SETUP(coredump)
> +{
> + FILE *file;
> + int ret;
> +
> + self->pid_coredump_server = -ESRCH;
> + self->fd_tmpfs_detached = -1;
> + file = fopen("/proc/sys/kernel/core_pattern", "r");
> + ASSERT_NE(NULL, file);
> +
> + ret = fread(self->original_core_pattern, 1, sizeof(self->original_core_pattern), file);
> + ASSERT_TRUE(ret || feof(file));
> + ASSERT_LT(ret, sizeof(self->original_core_pattern));
> +
> + self->original_core_pattern[ret] = '\0';
> + self->fd_tmpfs_detached = create_detached_tmpfs();
> + ASSERT_GE(self->fd_tmpfs_detached, 0);
> +
> + ret = fclose(file);
> + ASSERT_EQ(0, ret);
> +}
> +
> +FIXTURE_TEARDOWN(coredump)
> +{
> + const char *reason;
> + FILE *file;
> + int ret, status;
> +
> + if (self->pid_coredump_server > 0) {
> + kill(self->pid_coredump_server, SIGTERM);
> + waitpid(self->pid_coredump_server, &status, 0);
> + }
> + unlink("/tmp/coredump.file");
> + unlink("/tmp/coredump.socket");
> +
> + file = fopen("/proc/sys/kernel/core_pattern", "w");
> + if (!file) {
> + reason = "Unable to open core_pattern";
> + goto fail;
> + }
> +
> + ret = fprintf(file, "%s", self->original_core_pattern);
> + if (ret < 0) {
> + reason = "Unable to write to core_pattern";
> + goto fail;
> + }
> +
> + ret = fclose(file);
> + if (ret) {
> + reason = "Unable to close core_pattern";
> + goto fail;
> + }
> +
> + if (self->fd_tmpfs_detached >= 0) {
> + ret = close(self->fd_tmpfs_detached);
> + if (ret < 0) {
> + reason = "Unable to close detached tmpfs";
> + goto fail;
> + }
> + self->fd_tmpfs_detached = -1;
> + }
> +
> + return;
> +fail:
> + /* This should never happen */
> + fprintf(stderr, "Failed to cleanup coredump test: %s\n", reason);
> +}
> +
> +TEST_F(coredump, socket)
> +{
> + int pidfd, ret, status;
> + pid_t pid, pid_coredump_server;
> + struct stat st;
> + struct pidfd_info info = {};
> + int ipc_sockets[2];
> + char c;
> +
> + ASSERT_TRUE(set_core_pattern("@/tmp/coredump.socket"));
> +
> + ret = socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, ipc_sockets);
> + ASSERT_EQ(ret, 0);
> +
> + pid_coredump_server = fork();
> + ASSERT_GE(pid_coredump_server, 0);
> + if (pid_coredump_server == 0) {
> + int fd_server = -1, fd_coredump = -1, fd_peer_pidfd = -1, fd_core_file = -1;
> + int exit_code = EXIT_FAILURE;
> +
> + close(ipc_sockets[0]);
> +
> + fd_server = create_and_listen_unix_socket("/tmp/coredump.socket");
> + if (fd_server < 0)
> + goto out;
> +
> + if (write_nointr(ipc_sockets[1], "1", 1) < 0)
> + goto out;
> +
> + close(ipc_sockets[1]);
> +
> + fd_coredump = accept4(fd_server, NULL, NULL, SOCK_CLOEXEC);
> + if (fd_coredump < 0)
> + goto out;
> +
> + fd_peer_pidfd = get_peer_pidfd(fd_coredump);
> + if (fd_peer_pidfd < 0)
> + goto out;
> +
> + if (!get_pidfd_info(fd_peer_pidfd, &info))
> + goto out;
> +
> + if (!(info.mask & PIDFD_INFO_COREDUMP))
> + goto out;
> +
> + if (!(info.coredump_mask & PIDFD_COREDUMPED))
> + goto out;
> +
> + fd_core_file = creat("/tmp/coredump.file", 0644);
> + if (fd_core_file < 0)
> + goto out;
> +
> + for (;;) {
> + char buffer[4096];
> + ssize_t bytes_read, bytes_write;
> +
> + bytes_read = read(fd_coredump, buffer, sizeof(buffer));
> + if (bytes_read < 0)
> + goto out;
> +
> + if (bytes_read == 0)
> + break;
> +
> + bytes_write = write(fd_core_file, buffer, bytes_read);
> + if (bytes_read != bytes_write)
> + goto out;
> + }
> +
> + exit_code = EXIT_SUCCESS;
> +out:
> + if (fd_core_file >= 0)
> + close(fd_core_file);
> + if (fd_peer_pidfd >= 0)
> + close(fd_peer_pidfd);
> + if (fd_coredump >= 0)
> + close(fd_coredump);
> + if (fd_server >= 0)
> + close(fd_server);
> + _exit(exit_code);
> + }
> + self->pid_coredump_server = pid_coredump_server;
> +
> + EXPECT_EQ(close(ipc_sockets[1]), 0);
> + ASSERT_EQ(read_nointr(ipc_sockets[0], &c, 1), 1);
> + EXPECT_EQ(close(ipc_sockets[0]), 0);
> +
> + pid = fork();
> + ASSERT_GE(pid, 0);
> + if (pid == 0)
> + crashing_child();
> +
> + pidfd = sys_pidfd_open(pid, 0);
> + ASSERT_GE(pidfd, 0);
> +
> + waitpid(pid, &status, 0);
> + ASSERT_TRUE(WIFSIGNALED(status));
> + ASSERT_TRUE(WCOREDUMP(status));
> +
> + ASSERT_TRUE(get_pidfd_info(pidfd, &info));
> + ASSERT_GT((info.mask & PIDFD_INFO_COREDUMP), 0);
> + ASSERT_GT((info.coredump_mask & PIDFD_COREDUMPED), 0);
> +
> + wait_and_check_coredump_server(pid_coredump_server, _metadata, self);
> +
> + ASSERT_EQ(stat("/tmp/coredump.file", &st), 0);
> + ASSERT_GT(st.st_size, 0);
> +}
> +
> +TEST_F(coredump, socket_detect_userspace_client)
> +{
> + int pidfd, ret, status;
> + pid_t pid, pid_coredump_server;
> + struct stat st;
> + struct pidfd_info info = {};
> + int ipc_sockets[2];
> + char c;
> +
> + ASSERT_TRUE(set_core_pattern("@/tmp/coredump.socket"));
> +
> + ret = socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, ipc_sockets);
> + ASSERT_EQ(ret, 0);
> +
> + pid_coredump_server = fork();
> + ASSERT_GE(pid_coredump_server, 0);
> + if (pid_coredump_server == 0) {
> + int fd_server = -1, fd_coredump = -1, fd_peer_pidfd = -1;
> + int exit_code = EXIT_FAILURE;
> +
> + close(ipc_sockets[0]);
> +
> + fd_server = create_and_listen_unix_socket("/tmp/coredump.socket");
> + if (fd_server < 0)
> + goto out;
> +
> + if (write_nointr(ipc_sockets[1], "1", 1) < 0)
> + goto out;
> +
> + close(ipc_sockets[1]);
> +
> + fd_coredump = accept4(fd_server, NULL, NULL, SOCK_CLOEXEC);
> + if (fd_coredump < 0)
> + goto out;
> +
> + fd_peer_pidfd = get_peer_pidfd(fd_coredump);
> + if (fd_peer_pidfd < 0)
> + goto out;
> +
> + if (!get_pidfd_info(fd_peer_pidfd, &info))
> + goto out;
> +
> + if (!(info.mask & PIDFD_INFO_COREDUMP))
> + goto out;
> +
> + if (info.coredump_mask & PIDFD_COREDUMPED)
> + goto out;
> +
> + exit_code = EXIT_SUCCESS;
> +out:
> + if (fd_peer_pidfd >= 0)
> + close(fd_peer_pidfd);
> + if (fd_coredump >= 0)
> + close(fd_coredump);
> + if (fd_server >= 0)
> + close(fd_server);
> + _exit(exit_code);
> + }
> + self->pid_coredump_server = pid_coredump_server;
> +
> + EXPECT_EQ(close(ipc_sockets[1]), 0);
> + ASSERT_EQ(read_nointr(ipc_sockets[0], &c, 1), 1);
> + EXPECT_EQ(close(ipc_sockets[0]), 0);
> +
> + pid = fork();
> + ASSERT_GE(pid, 0);
> + if (pid == 0) {
> + int fd_socket;
> + ssize_t ret;
> + const struct sockaddr_un coredump_sk = {
> + .sun_family = AF_UNIX,
> + .sun_path = "/tmp/coredump.socket",
> + };
> + size_t coredump_sk_len =
> + offsetof(struct sockaddr_un, sun_path) +
> + sizeof("/tmp/coredump.socket");
> +
> + fd_socket = socket(AF_UNIX, SOCK_STREAM, 0);
> + if (fd_socket < 0)
> + _exit(EXIT_FAILURE);
> +
> + ret = connect(fd_socket, (const struct sockaddr *)&coredump_sk, coredump_sk_len);
> + if (ret < 0)
> + _exit(EXIT_FAILURE);
> +
> + close(fd_socket);
> + _exit(EXIT_SUCCESS);
> + }
> +
> + pidfd = sys_pidfd_open(pid, 0);
> + ASSERT_GE(pidfd, 0);
> +
> + waitpid(pid, &status, 0);
> + ASSERT_TRUE(WIFEXITED(status));
> + ASSERT_EQ(WEXITSTATUS(status), 0);
> +
> + ASSERT_TRUE(get_pidfd_info(pidfd, &info));
> + ASSERT_GT((info.mask & PIDFD_INFO_COREDUMP), 0);
> + ASSERT_EQ((info.coredump_mask & PIDFD_COREDUMPED), 0);
> +
> + wait_and_check_coredump_server(pid_coredump_server, _metadata, self);
> +
> + ASSERT_NE(stat("/tmp/coredump.file", &st), 0);
> + ASSERT_EQ(errno, ENOENT);
> +}
> +
> +TEST_F(coredump, socket_enoent)
> +{
> + int pidfd, status;
> + pid_t pid;
> +
> + ASSERT_TRUE(set_core_pattern("@/tmp/coredump.socket"));
> +
> + pid = fork();
> + ASSERT_GE(pid, 0);
> + if (pid == 0)
> + crashing_child();
> +
> + pidfd = sys_pidfd_open(pid, 0);
> + ASSERT_GE(pidfd, 0);
> +
> + waitpid(pid, &status, 0);
> + ASSERT_TRUE(WIFSIGNALED(status));
> + ASSERT_FALSE(WCOREDUMP(status));
> +}
> +
> +TEST_F(coredump, socket_no_listener)
> +{
> + int pidfd, ret, status;
> + pid_t pid, pid_coredump_server;
> + int ipc_sockets[2];
> + char c;
> + const struct sockaddr_un coredump_sk = {
> + .sun_family = AF_UNIX,
> + .sun_path = "/tmp/coredump.socket",
> + };
> + size_t coredump_sk_len = offsetof(struct sockaddr_un, sun_path) +
> + sizeof("/tmp/coredump.socket");
> +
> + ASSERT_TRUE(set_core_pattern("@/tmp/coredump.socket"));
> +
> + ret = socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, ipc_sockets);
> + ASSERT_EQ(ret, 0);
> +
> + pid_coredump_server = fork();
> + ASSERT_GE(pid_coredump_server, 0);
> + if (pid_coredump_server == 0) {
> + int fd_server = -1;
> + int exit_code = EXIT_FAILURE;
> +
> + close(ipc_sockets[0]);
> +
> + fd_server = socket(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0);
> + if (fd_server < 0)
> + goto out;
> +
> + ret = bind(fd_server, (const struct sockaddr *)&coredump_sk, coredump_sk_len);
> + if (ret < 0)
> + goto out;
> +
> + if (write_nointr(ipc_sockets[1], "1", 1) < 0)
> + goto out;
> +
> + exit_code = EXIT_SUCCESS;
> +out:
> + if (fd_server >= 0)
> + close(fd_server);
> + close(ipc_sockets[1]);
> + _exit(exit_code);
> + }
> + self->pid_coredump_server = pid_coredump_server;
> +
> + EXPECT_EQ(close(ipc_sockets[1]), 0);
> + ASSERT_EQ(read_nointr(ipc_sockets[0], &c, 1), 1);
> + EXPECT_EQ(close(ipc_sockets[0]), 0);
> +
> + pid = fork();
> + ASSERT_GE(pid, 0);
> + if (pid == 0)
> + crashing_child();
> +
> + pidfd = sys_pidfd_open(pid, 0);
> + ASSERT_GE(pidfd, 0);
> +
> + waitpid(pid, &status, 0);
> + ASSERT_TRUE(WIFSIGNALED(status));
> + ASSERT_FALSE(WCOREDUMP(status));
> +
> + wait_and_check_coredump_server(pid_coredump_server, _metadata, self);
> +}
> +
> +TEST_F(coredump, socket_invalid_paths)
> +{
> + ASSERT_FALSE(set_core_pattern("@ /tmp/coredump.socket"));
> + ASSERT_FALSE(set_core_pattern("@/tmp/../coredump.socket"));
> + ASSERT_FALSE(set_core_pattern("@../coredump.socket"));
> + ASSERT_FALSE(set_core_pattern("@/tmp/coredump.socket/.."));
> + ASSERT_FALSE(set_core_pattern("@.."));
> +
> + ASSERT_FALSE(set_core_pattern("@@ /tmp/coredump.socket"));
> + ASSERT_FALSE(set_core_pattern("@@/tmp/../coredump.socket"));
> + ASSERT_FALSE(set_core_pattern("@@../coredump.socket"));
> + ASSERT_FALSE(set_core_pattern("@@/tmp/coredump.socket/.."));
> + ASSERT_FALSE(set_core_pattern("@@.."));
> +
> + ASSERT_FALSE(set_core_pattern("@@@/tmp/coredump.socket"));
> +}
> +
> +TEST_HARNESS_MAIN
> diff --git a/tools/testing/selftests/coredump/stackdump_test.c b/tools/testing/selftests/coredump/stackdump_test.c
> index a4ac80bb1003..c2e895bcc160 100644
> --- a/tools/testing/selftests/coredump/stackdump_test.c
> +++ b/tools/testing/selftests/coredump/stackdump_test.c
> @@ -23,57 +23,15 @@
> #include "../filesystems/wrappers.h"
> #include "../pidfd/pidfd.h"
>
> +#include "coredump_test.h"
> +
> #define STACKDUMP_FILE "stack_values"
> #define STACKDUMP_SCRIPT "stackdump"
> -#define NUM_THREAD_SPAWN 128
>
> #ifndef PAGE_SIZE
> #define PAGE_SIZE 4096
> #endif
>
> -static void *do_nothing(void *)
> -{
> - while (1)
> - pause();
> -
> - return NULL;
> -}
> -
> -static void crashing_child(void)
> -{
> - pthread_t thread;
> - int i;
> -
> - for (i = 0; i < NUM_THREAD_SPAWN; ++i)
> - pthread_create(&thread, NULL, do_nothing, NULL);
> -
> - /* crash on purpose */
> - i = *(int *)NULL;
> -}
> -
> -FIXTURE(coredump)
> -{
> - char original_core_pattern[256];
> - pid_t pid_coredump_server;
> - int fd_tmpfs_detached;
> -};
> -
> -static int create_detached_tmpfs(void)
> -{
> - int fd_context, fd_tmpfs;
> -
> - fd_context = sys_fsopen("tmpfs", 0);
> - if (fd_context < 0)
> - return -1;
> -
> - if (sys_fsconfig(fd_context, FSCONFIG_CMD_CREATE, NULL, NULL, 0) < 0)
> - return -1;
> -
> - fd_tmpfs = sys_fsmount(fd_context, 0, 0);
> - close(fd_context);
> - return fd_tmpfs;
> -}
> -
> FIXTURE_SETUP(coredump)
> {
> FILE *file;
> @@ -208,1620 +166,4 @@ TEST_F_TIMEOUT(coredump, stackdump, 120)
> fclose(file);
> }
>
> -static int create_and_listen_unix_socket(const char *path)
> -{
> - struct sockaddr_un addr = {
> - .sun_family = AF_UNIX,
> - };
> - assert(strlen(path) < sizeof(addr.sun_path) - 1);
> - strncpy(addr.sun_path, path, sizeof(addr.sun_path) - 1);
> - size_t addr_len =
> - offsetof(struct sockaddr_un, sun_path) + strlen(path) + 1;
> - int fd, ret;
> -
> - fd = socket(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0);
> - if (fd < 0)
> - goto out;
> -
> - ret = bind(fd, (const struct sockaddr *)&addr, addr_len);
> - if (ret < 0)
> - goto out;
> -
> - ret = listen(fd, 128);
> - if (ret < 0)
> - goto out;
> -
> - return fd;
> -
> -out:
> - if (fd >= 0)
> - close(fd);
> - return -1;
> -}
> -
> -static bool set_core_pattern(const char *pattern)
> -{
> - int fd;
> - ssize_t ret;
> -
> - fd = open("/proc/sys/kernel/core_pattern", O_WRONLY | O_CLOEXEC);
> - if (fd < 0)
> - return false;
> -
> - ret = write(fd, pattern, strlen(pattern));
> - close(fd);
> - if (ret < 0)
> - return false;
> -
> - fprintf(stderr, "Set core_pattern to '%s' | %zu == %zu\n", pattern, ret, strlen(pattern));
> - return ret == strlen(pattern);
> -}
> -
> -static int get_peer_pidfd(int fd)
> -{
> - int fd_peer_pidfd;
> - socklen_t fd_peer_pidfd_len = sizeof(fd_peer_pidfd);
> - int ret = getsockopt(fd, SOL_SOCKET, SO_PEERPIDFD, &fd_peer_pidfd,
> - &fd_peer_pidfd_len);
> - if (ret < 0) {
> - fprintf(stderr, "%m - Failed to retrieve peer pidfd for coredump socket connection\n");
> - return -1;
> - }
> - return fd_peer_pidfd;
> -}
> -
> -static bool get_pidfd_info(int fd_peer_pidfd, struct pidfd_info *info)
> -{
> - memset(info, 0, sizeof(*info));
> - info->mask = PIDFD_INFO_EXIT | PIDFD_INFO_COREDUMP;
> - return ioctl(fd_peer_pidfd, PIDFD_GET_INFO, info) == 0;
> -}
> -
> -static void
> -wait_and_check_coredump_server(pid_t pid_coredump_server,
> - struct __test_metadata *const _metadata,
> - FIXTURE_DATA(coredump)* self)
> -{
> - int status;
> - waitpid(pid_coredump_server, &status, 0);
> - self->pid_coredump_server = -ESRCH;
> - ASSERT_TRUE(WIFEXITED(status));
> - ASSERT_EQ(WEXITSTATUS(status), 0);
> -}
> -
> -TEST_F(coredump, socket)
> -{
> - int pidfd, ret, status;
> - pid_t pid, pid_coredump_server;
> - struct stat st;
> - struct pidfd_info info = {};
> - int ipc_sockets[2];
> - char c;
> -
> - ASSERT_TRUE(set_core_pattern("@/tmp/coredump.socket"));
> -
> - ret = socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, ipc_sockets);
> - ASSERT_EQ(ret, 0);
> -
> - pid_coredump_server = fork();
> - ASSERT_GE(pid_coredump_server, 0);
> - if (pid_coredump_server == 0) {
> - int fd_server = -1, fd_coredump = -1, fd_peer_pidfd = -1, fd_core_file = -1;
> - int exit_code = EXIT_FAILURE;
> -
> - close(ipc_sockets[0]);
> -
> - fd_server = create_and_listen_unix_socket("/tmp/coredump.socket");
> - if (fd_server < 0)
> - goto out;
> -
> - if (write_nointr(ipc_sockets[1], "1", 1) < 0)
> - goto out;
> -
> - close(ipc_sockets[1]);
> -
> - fd_coredump = accept4(fd_server, NULL, NULL, SOCK_CLOEXEC);
> - if (fd_coredump < 0)
> - goto out;
> -
> - fd_peer_pidfd = get_peer_pidfd(fd_coredump);
> - if (fd_peer_pidfd < 0)
> - goto out;
> -
> - if (!get_pidfd_info(fd_peer_pidfd, &info))
> - goto out;
> -
> - if (!(info.mask & PIDFD_INFO_COREDUMP))
> - goto out;
> -
> - if (!(info.coredump_mask & PIDFD_COREDUMPED))
> - goto out;
> -
> - fd_core_file = creat("/tmp/coredump.file", 0644);
> - if (fd_core_file < 0)
> - goto out;
> -
> - for (;;) {
> - char buffer[4096];
> - ssize_t bytes_read, bytes_write;
> -
> - bytes_read = read(fd_coredump, buffer, sizeof(buffer));
> - if (bytes_read < 0)
> - goto out;
> -
> - if (bytes_read == 0)
> - break;
> -
> - bytes_write = write(fd_core_file, buffer, bytes_read);
> - if (bytes_read != bytes_write)
> - goto out;
> - }
> -
> - exit_code = EXIT_SUCCESS;
> -out:
> - if (fd_core_file >= 0)
> - close(fd_core_file);
> - if (fd_peer_pidfd >= 0)
> - close(fd_peer_pidfd);
> - if (fd_coredump >= 0)
> - close(fd_coredump);
> - if (fd_server >= 0)
> - close(fd_server);
> - _exit(exit_code);
> - }
> - self->pid_coredump_server = pid_coredump_server;
> -
> - EXPECT_EQ(close(ipc_sockets[1]), 0);
> - ASSERT_EQ(read_nointr(ipc_sockets[0], &c, 1), 1);
> - EXPECT_EQ(close(ipc_sockets[0]), 0);
> -
> - pid = fork();
> - ASSERT_GE(pid, 0);
> - if (pid == 0)
> - crashing_child();
> -
> - pidfd = sys_pidfd_open(pid, 0);
> - ASSERT_GE(pidfd, 0);
> -
> - waitpid(pid, &status, 0);
> - ASSERT_TRUE(WIFSIGNALED(status));
> - ASSERT_TRUE(WCOREDUMP(status));
> -
> - ASSERT_TRUE(get_pidfd_info(pidfd, &info));
> - ASSERT_GT((info.mask & PIDFD_INFO_COREDUMP), 0);
> - ASSERT_GT((info.coredump_mask & PIDFD_COREDUMPED), 0);
> -
> - wait_and_check_coredump_server(pid_coredump_server, _metadata, self);
> -
> - ASSERT_EQ(stat("/tmp/coredump.file", &st), 0);
> - ASSERT_GT(st.st_size, 0);
> - system("file /tmp/coredump.file");
> -}
> -
> -TEST_F(coredump, socket_detect_userspace_client)
> -{
> - int pidfd, ret, status;
> - pid_t pid, pid_coredump_server;
> - struct stat st;
> - struct pidfd_info info = {};
> - int ipc_sockets[2];
> - char c;
> -
> - ASSERT_TRUE(set_core_pattern("@/tmp/coredump.socket"));
> -
> - ret = socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, ipc_sockets);
> - ASSERT_EQ(ret, 0);
> -
> - pid_coredump_server = fork();
> - ASSERT_GE(pid_coredump_server, 0);
> - if (pid_coredump_server == 0) {
> - int fd_server = -1, fd_coredump = -1, fd_peer_pidfd = -1;
> - int exit_code = EXIT_FAILURE;
> -
> - close(ipc_sockets[0]);
> -
> - fd_server = create_and_listen_unix_socket("/tmp/coredump.socket");
> - if (fd_server < 0)
> - goto out;
> -
> - if (write_nointr(ipc_sockets[1], "1", 1) < 0)
> - goto out;
> -
> - close(ipc_sockets[1]);
> -
> - fd_coredump = accept4(fd_server, NULL, NULL, SOCK_CLOEXEC);
> - if (fd_coredump < 0)
> - goto out;
> -
> - fd_peer_pidfd = get_peer_pidfd(fd_coredump);
> - if (fd_peer_pidfd < 0)
> - goto out;
> -
> - if (!get_pidfd_info(fd_peer_pidfd, &info))
> - goto out;
> -
> - if (!(info.mask & PIDFD_INFO_COREDUMP))
> - goto out;
> -
> - if (info.coredump_mask & PIDFD_COREDUMPED)
> - goto out;
> -
> - exit_code = EXIT_SUCCESS;
> -out:
> - if (fd_peer_pidfd >= 0)
> - close(fd_peer_pidfd);
> - if (fd_coredump >= 0)
> - close(fd_coredump);
> - if (fd_server >= 0)
> - close(fd_server);
> - _exit(exit_code);
> - }
> - self->pid_coredump_server = pid_coredump_server;
> -
> - EXPECT_EQ(close(ipc_sockets[1]), 0);
> - ASSERT_EQ(read_nointr(ipc_sockets[0], &c, 1), 1);
> - EXPECT_EQ(close(ipc_sockets[0]), 0);
> -
> - pid = fork();
> - ASSERT_GE(pid, 0);
> - if (pid == 0) {
> - int fd_socket;
> - ssize_t ret;
> - const struct sockaddr_un coredump_sk = {
> - .sun_family = AF_UNIX,
> - .sun_path = "/tmp/coredump.socket",
> - };
> - size_t coredump_sk_len =
> - offsetof(struct sockaddr_un, sun_path) +
> - sizeof("/tmp/coredump.socket");
> -
> - fd_socket = socket(AF_UNIX, SOCK_STREAM, 0);
> - if (fd_socket < 0)
> - _exit(EXIT_FAILURE);
> -
> - ret = connect(fd_socket, (const struct sockaddr *)&coredump_sk, coredump_sk_len);
> - if (ret < 0)
> - _exit(EXIT_FAILURE);
> -
> - close(fd_socket);
> - _exit(EXIT_SUCCESS);
> - }
> -
> - pidfd = sys_pidfd_open(pid, 0);
> - ASSERT_GE(pidfd, 0);
> -
> - waitpid(pid, &status, 0);
> - ASSERT_TRUE(WIFEXITED(status));
> - ASSERT_EQ(WEXITSTATUS(status), 0);
> -
> - ASSERT_TRUE(get_pidfd_info(pidfd, &info));
> - ASSERT_GT((info.mask & PIDFD_INFO_COREDUMP), 0);
> - ASSERT_EQ((info.coredump_mask & PIDFD_COREDUMPED), 0);
> -
> - wait_and_check_coredump_server(pid_coredump_server, _metadata, self);
> -
> - ASSERT_NE(stat("/tmp/coredump.file", &st), 0);
> - ASSERT_EQ(errno, ENOENT);
> -}
> -
> -TEST_F(coredump, socket_enoent)
> -{
> - int pidfd, status;
> - pid_t pid;
> -
> - ASSERT_TRUE(set_core_pattern("@/tmp/coredump.socket"));
> -
> - pid = fork();
> - ASSERT_GE(pid, 0);
> - if (pid == 0)
> - crashing_child();
> -
> - pidfd = sys_pidfd_open(pid, 0);
> - ASSERT_GE(pidfd, 0);
> -
> - waitpid(pid, &status, 0);
> - ASSERT_TRUE(WIFSIGNALED(status));
> - ASSERT_FALSE(WCOREDUMP(status));
> -}
> -
> -TEST_F(coredump, socket_no_listener)
> -{
> - int pidfd, ret, status;
> - pid_t pid, pid_coredump_server;
> - int ipc_sockets[2];
> - char c;
> - const struct sockaddr_un coredump_sk = {
> - .sun_family = AF_UNIX,
> - .sun_path = "/tmp/coredump.socket",
> - };
> - size_t coredump_sk_len = offsetof(struct sockaddr_un, sun_path) +
> - sizeof("/tmp/coredump.socket");
> -
> - ASSERT_TRUE(set_core_pattern("@/tmp/coredump.socket"));
> -
> - ret = socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, ipc_sockets);
> - ASSERT_EQ(ret, 0);
> -
> - pid_coredump_server = fork();
> - ASSERT_GE(pid_coredump_server, 0);
> - if (pid_coredump_server == 0) {
> - int fd_server = -1;
> - int exit_code = EXIT_FAILURE;
> -
> - close(ipc_sockets[0]);
> -
> - fd_server = socket(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0);
> - if (fd_server < 0)
> - goto out;
> -
> - ret = bind(fd_server, (const struct sockaddr *)&coredump_sk, coredump_sk_len);
> - if (ret < 0)
> - goto out;
> -
> - if (write_nointr(ipc_sockets[1], "1", 1) < 0)
> - goto out;
> -
> - exit_code = EXIT_SUCCESS;
> -out:
> - if (fd_server >= 0)
> - close(fd_server);
> - close(ipc_sockets[1]);
> - _exit(exit_code);
> - }
> - self->pid_coredump_server = pid_coredump_server;
> -
> - EXPECT_EQ(close(ipc_sockets[1]), 0);
> - ASSERT_EQ(read_nointr(ipc_sockets[0], &c, 1), 1);
> - EXPECT_EQ(close(ipc_sockets[0]), 0);
> -
> - pid = fork();
> - ASSERT_GE(pid, 0);
> - if (pid == 0)
> - crashing_child();
> -
> - pidfd = sys_pidfd_open(pid, 0);
> - ASSERT_GE(pidfd, 0);
> -
> - waitpid(pid, &status, 0);
> - ASSERT_TRUE(WIFSIGNALED(status));
> - ASSERT_FALSE(WCOREDUMP(status));
> -
> - wait_and_check_coredump_server(pid_coredump_server, _metadata, self);
> -}
> -
> -static ssize_t recv_marker(int fd)
> -{
> - enum coredump_mark mark = COREDUMP_MARK_REQACK;
> - ssize_t ret;
> -
> - ret = recv(fd, &mark, sizeof(mark), MSG_WAITALL);
> - if (ret != sizeof(mark))
> - return -1;
> -
> - switch (mark) {
> - case COREDUMP_MARK_REQACK:
> - fprintf(stderr, "Received marker: ReqAck\n");
> - return COREDUMP_MARK_REQACK;
> - case COREDUMP_MARK_MINSIZE:
> - fprintf(stderr, "Received marker: MinSize\n");
> - return COREDUMP_MARK_MINSIZE;
> - case COREDUMP_MARK_MAXSIZE:
> - fprintf(stderr, "Received marker: MaxSize\n");
> - return COREDUMP_MARK_MAXSIZE;
> - case COREDUMP_MARK_UNSUPPORTED:
> - fprintf(stderr, "Received marker: Unsupported\n");
> - return COREDUMP_MARK_UNSUPPORTED;
> - case COREDUMP_MARK_CONFLICTING:
> - fprintf(stderr, "Received marker: Conflicting\n");
> - return COREDUMP_MARK_CONFLICTING;
> - default:
> - fprintf(stderr, "Received unknown marker: %u\n", mark);
> - break;
> - }
> - return -1;
> -}
> -
> -static bool read_marker(int fd, enum coredump_mark mark)
> -{
> - ssize_t ret;
> -
> - ret = recv_marker(fd);
> - if (ret < 0)
> - return false;
> - return ret == mark;
> -}
> -
> -static bool read_coredump_req(int fd, struct coredump_req *req)
> -{
> - ssize_t ret;
> - size_t field_size, user_size, ack_size, kernel_size, remaining_size;
> -
> - memset(req, 0, sizeof(*req));
> - field_size = sizeof(req->size);
> -
> - /* Peek the size of the coredump request. */
> - ret = recv(fd, req, field_size, MSG_PEEK | MSG_WAITALL);
> - if (ret != field_size)
> - return false;
> - kernel_size = req->size;
> -
> - if (kernel_size < COREDUMP_ACK_SIZE_VER0)
> - return false;
> - if (kernel_size >= PAGE_SIZE)
> - return false;
> -
> - /* Use the minimum of user and kernel size to read the full request. */
> - user_size = sizeof(struct coredump_req);
> - ack_size = user_size < kernel_size ? user_size : kernel_size;
> - ret = recv(fd, req, ack_size, MSG_WAITALL);
> - if (ret != ack_size)
> - return false;
> -
> - fprintf(stderr, "Read coredump request with size %u and mask 0x%llx\n",
> - req->size, (unsigned long long)req->mask);
> -
> - if (user_size > kernel_size)
> - remaining_size = user_size - kernel_size;
> - else
> - remaining_size = kernel_size - user_size;
> -
> - if (PAGE_SIZE <= remaining_size)
> - return false;
> -
> - /*
> - * Discard any additional data if the kernel's request was larger than
> - * what we knew about or cared about.
> - */
> - if (remaining_size) {
> - char buffer[PAGE_SIZE];
> -
> - ret = recv(fd, buffer, sizeof(buffer), MSG_WAITALL);
> - if (ret != remaining_size)
> - return false;
> - fprintf(stderr, "Discarded %zu bytes of data after coredump request\n", remaining_size);
> - }
> -
> - return true;
> -}
> -
> -static bool send_coredump_ack(int fd, const struct coredump_req *req,
> - __u64 mask, size_t size_ack)
> -{
> - ssize_t ret;
> - /*
> - * Wrap struct coredump_ack in a larger struct so we can
> - * simulate sending to much data to the kernel.
> - */
> - struct large_ack_for_size_testing {
> - struct coredump_ack ack;
> - char buffer[PAGE_SIZE];
> - } large_ack = {};
> -
> - if (!size_ack)
> - size_ack = sizeof(struct coredump_ack) < req->size_ack ?
> - sizeof(struct coredump_ack) :
> - req->size_ack;
> - large_ack.ack.mask = mask;
> - large_ack.ack.size = size_ack;
> - ret = send(fd, &large_ack, size_ack, MSG_NOSIGNAL);
> - if (ret != size_ack)
> - return false;
> -
> - fprintf(stderr, "Sent coredump ack with size %zu and mask 0x%llx\n",
> - size_ack, (unsigned long long)mask);
> - return true;
> -}
> -
> -static bool check_coredump_req(const struct coredump_req *req, size_t min_size,
> - __u64 required_mask)
> -{
> - if (req->size < min_size)
> - return false;
> - if ((req->mask & required_mask) != required_mask)
> - return false;
> - if (req->mask & ~required_mask)
> - return false;
> - return true;
> -}
> -
> -TEST_F(coredump, socket_request_kernel)
> -{
> - int pidfd, ret, status;
> - pid_t pid, pid_coredump_server;
> - struct stat st;
> - struct pidfd_info info = {};
> - int ipc_sockets[2];
> - char c;
> -
> - ASSERT_TRUE(set_core_pattern("@@/tmp/coredump.socket"));
> -
> - ret = socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, ipc_sockets);
> - ASSERT_EQ(ret, 0);
> -
> - pid_coredump_server = fork();
> - ASSERT_GE(pid_coredump_server, 0);
> - if (pid_coredump_server == 0) {
> - struct coredump_req req = {};
> - int fd_server = -1, fd_coredump = -1, fd_core_file = -1, fd_peer_pidfd = -1;
> - int exit_code = EXIT_FAILURE;
> -
> - close(ipc_sockets[0]);
> -
> - fd_server = create_and_listen_unix_socket("/tmp/coredump.socket");
> - if (fd_server < 0)
> - goto out;
> -
> - if (write_nointr(ipc_sockets[1], "1", 1) < 0)
> - goto out;
> -
> - close(ipc_sockets[1]);
> -
> - fd_coredump = accept4(fd_server, NULL, NULL, SOCK_CLOEXEC);
> - if (fd_coredump < 0)
> - goto out;
> -
> - fd_peer_pidfd = get_peer_pidfd(fd_coredump);
> - if (fd_peer_pidfd < 0)
> - goto out;
> -
> - if (!get_pidfd_info(fd_peer_pidfd, &info))
> - goto out;
> -
> - if (!(info.mask & PIDFD_INFO_COREDUMP))
> - goto out;
> -
> - if (!(info.coredump_mask & PIDFD_COREDUMPED))
> - goto out;
> -
> - fd_core_file = creat("/tmp/coredump.file", 0644);
> - if (fd_core_file < 0)
> - goto out;
> -
> - if (!read_coredump_req(fd_coredump, &req))
> - goto out;
> -
> - if (!check_coredump_req(&req, COREDUMP_ACK_SIZE_VER0,
> - COREDUMP_KERNEL | COREDUMP_USERSPACE |
> - COREDUMP_REJECT | COREDUMP_WAIT))
> - goto out;
> -
> - if (!send_coredump_ack(fd_coredump, &req,
> - COREDUMP_KERNEL | COREDUMP_WAIT, 0))
> - goto out;
> -
> - if (!read_marker(fd_coredump, COREDUMP_MARK_REQACK))
> - goto out;
> -
> - for (;;) {
> - char buffer[4096];
> - ssize_t bytes_read, bytes_write;
> -
> - bytes_read = read(fd_coredump, buffer, sizeof(buffer));
> - if (bytes_read < 0)
> - goto out;
> -
> - if (bytes_read == 0)
> - break;
> -
> - bytes_write = write(fd_core_file, buffer, bytes_read);
> - if (bytes_read != bytes_write)
> - goto out;
> - }
> -
> - exit_code = EXIT_SUCCESS;
> -out:
> - if (fd_core_file >= 0)
> - close(fd_core_file);
> - if (fd_peer_pidfd >= 0)
> - close(fd_peer_pidfd);
> - if (fd_coredump >= 0)
> - close(fd_coredump);
> - if (fd_server >= 0)
> - close(fd_server);
> - _exit(exit_code);
> - }
> - self->pid_coredump_server = pid_coredump_server;
> -
> - EXPECT_EQ(close(ipc_sockets[1]), 0);
> - ASSERT_EQ(read_nointr(ipc_sockets[0], &c, 1), 1);
> - EXPECT_EQ(close(ipc_sockets[0]), 0);
> -
> - pid = fork();
> - ASSERT_GE(pid, 0);
> - if (pid == 0)
> - crashing_child();
> -
> - pidfd = sys_pidfd_open(pid, 0);
> - ASSERT_GE(pidfd, 0);
> -
> - waitpid(pid, &status, 0);
> - ASSERT_TRUE(WIFSIGNALED(status));
> - ASSERT_TRUE(WCOREDUMP(status));
> -
> - ASSERT_TRUE(get_pidfd_info(pidfd, &info));
> - ASSERT_GT((info.mask & PIDFD_INFO_COREDUMP), 0);
> - ASSERT_GT((info.coredump_mask & PIDFD_COREDUMPED), 0);
> -
> - wait_and_check_coredump_server(pid_coredump_server, _metadata, self);
> -
> - ASSERT_EQ(stat("/tmp/coredump.file", &st), 0);
> - ASSERT_GT(st.st_size, 0);
> - system("file /tmp/coredump.file");
> -}
> -
> -TEST_F(coredump, socket_request_userspace)
> -{
> - int pidfd, ret, status;
> - pid_t pid, pid_coredump_server;
> - struct pidfd_info info = {};
> - int ipc_sockets[2];
> - char c;
> -
> - ASSERT_TRUE(set_core_pattern("@@/tmp/coredump.socket"));
> -
> - ret = socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, ipc_sockets);
> - ASSERT_EQ(ret, 0);
> -
> - pid_coredump_server = fork();
> - ASSERT_GE(pid_coredump_server, 0);
> - if (pid_coredump_server == 0) {
> - struct coredump_req req = {};
> - int fd_server = -1, fd_coredump = -1, fd_peer_pidfd = -1;
> - int exit_code = EXIT_FAILURE;
> -
> - close(ipc_sockets[0]);
> -
> - fd_server = create_and_listen_unix_socket("/tmp/coredump.socket");
> - if (fd_server < 0)
> - goto out;
> -
> - if (write_nointr(ipc_sockets[1], "1", 1) < 0)
> - goto out;
> -
> - close(ipc_sockets[1]);
> -
> - fd_coredump = accept4(fd_server, NULL, NULL, SOCK_CLOEXEC);
> - if (fd_coredump < 0)
> - goto out;
> -
> - fd_peer_pidfd = get_peer_pidfd(fd_coredump);
> - if (fd_peer_pidfd < 0)
> - goto out;
> -
> - if (!get_pidfd_info(fd_peer_pidfd, &info))
> - goto out;
> -
> - if (!(info.mask & PIDFD_INFO_COREDUMP))
> - goto out;
> -
> - if (!(info.coredump_mask & PIDFD_COREDUMPED))
> - goto out;
> -
> - if (!read_coredump_req(fd_coredump, &req))
> - goto out;
> -
> - if (!check_coredump_req(&req, COREDUMP_ACK_SIZE_VER0,
> - COREDUMP_KERNEL | COREDUMP_USERSPACE |
> - COREDUMP_REJECT | COREDUMP_WAIT))
> - goto out;
> -
> - if (!send_coredump_ack(fd_coredump, &req,
> - COREDUMP_USERSPACE | COREDUMP_WAIT, 0))
> - goto out;
> -
> - if (!read_marker(fd_coredump, COREDUMP_MARK_REQACK))
> - goto out;
> -
> - for (;;) {
> - char buffer[4096];
> - ssize_t bytes_read;
> -
> - bytes_read = read(fd_coredump, buffer, sizeof(buffer));
> - if (bytes_read > 0)
> - goto out;
> -
> - if (bytes_read < 0)
> - goto out;
> -
> - if (bytes_read == 0)
> - break;
> - }
> -
> - exit_code = EXIT_SUCCESS;
> -out:
> - if (fd_peer_pidfd >= 0)
> - close(fd_peer_pidfd);
> - if (fd_coredump >= 0)
> - close(fd_coredump);
> - if (fd_server >= 0)
> - close(fd_server);
> - _exit(exit_code);
> - }
> - self->pid_coredump_server = pid_coredump_server;
> -
> - EXPECT_EQ(close(ipc_sockets[1]), 0);
> - ASSERT_EQ(read_nointr(ipc_sockets[0], &c, 1), 1);
> - EXPECT_EQ(close(ipc_sockets[0]), 0);
> -
> - pid = fork();
> - ASSERT_GE(pid, 0);
> - if (pid == 0)
> - crashing_child();
> -
> - pidfd = sys_pidfd_open(pid, 0);
> - ASSERT_GE(pidfd, 0);
> -
> - waitpid(pid, &status, 0);
> - ASSERT_TRUE(WIFSIGNALED(status));
> - ASSERT_TRUE(WCOREDUMP(status));
> -
> - ASSERT_TRUE(get_pidfd_info(pidfd, &info));
> - ASSERT_GT((info.mask & PIDFD_INFO_COREDUMP), 0);
> - ASSERT_GT((info.coredump_mask & PIDFD_COREDUMPED), 0);
> -
> - wait_and_check_coredump_server(pid_coredump_server, _metadata, self);
> -}
> -
> -TEST_F(coredump, socket_request_reject)
> -{
> - int pidfd, ret, status;
> - pid_t pid, pid_coredump_server;
> - struct pidfd_info info = {};
> - int ipc_sockets[2];
> - char c;
> -
> - ASSERT_TRUE(set_core_pattern("@@/tmp/coredump.socket"));
> -
> - ret = socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, ipc_sockets);
> - ASSERT_EQ(ret, 0);
> -
> - pid_coredump_server = fork();
> - ASSERT_GE(pid_coredump_server, 0);
> - if (pid_coredump_server == 0) {
> - struct coredump_req req = {};
> - int fd_server = -1, fd_coredump = -1, fd_peer_pidfd = -1;
> - int exit_code = EXIT_FAILURE;
> -
> - close(ipc_sockets[0]);
> -
> - fd_server = create_and_listen_unix_socket("/tmp/coredump.socket");
> - if (fd_server < 0)
> - goto out;
> -
> - if (write_nointr(ipc_sockets[1], "1", 1) < 0)
> - goto out;
> -
> - close(ipc_sockets[1]);
> -
> - fd_coredump = accept4(fd_server, NULL, NULL, SOCK_CLOEXEC);
> - if (fd_coredump < 0)
> - goto out;
> -
> - fd_peer_pidfd = get_peer_pidfd(fd_coredump);
> - if (fd_peer_pidfd < 0)
> - goto out;
> -
> - if (!get_pidfd_info(fd_peer_pidfd, &info))
> - goto out;
> -
> - if (!(info.mask & PIDFD_INFO_COREDUMP))
> - goto out;
> -
> - if (!(info.coredump_mask & PIDFD_COREDUMPED))
> - goto out;
> -
> - if (!read_coredump_req(fd_coredump, &req))
> - goto out;
> -
> - if (!check_coredump_req(&req, COREDUMP_ACK_SIZE_VER0,
> - COREDUMP_KERNEL | COREDUMP_USERSPACE |
> - COREDUMP_REJECT | COREDUMP_WAIT))
> - goto out;
> -
> - if (!send_coredump_ack(fd_coredump, &req,
> - COREDUMP_REJECT | COREDUMP_WAIT, 0))
> - goto out;
> -
> - if (!read_marker(fd_coredump, COREDUMP_MARK_REQACK))
> - goto out;
> -
> - for (;;) {
> - char buffer[4096];
> - ssize_t bytes_read;
> -
> - bytes_read = read(fd_coredump, buffer, sizeof(buffer));
> - if (bytes_read > 0)
> - goto out;
> -
> - if (bytes_read < 0)
> - goto out;
> -
> - if (bytes_read == 0)
> - break;
> - }
> -
> - exit_code = EXIT_SUCCESS;
> -out:
> - if (fd_peer_pidfd >= 0)
> - close(fd_peer_pidfd);
> - if (fd_coredump >= 0)
> - close(fd_coredump);
> - if (fd_server >= 0)
> - close(fd_server);
> - _exit(exit_code);
> - }
> - self->pid_coredump_server = pid_coredump_server;
> -
> - EXPECT_EQ(close(ipc_sockets[1]), 0);
> - ASSERT_EQ(read_nointr(ipc_sockets[0], &c, 1), 1);
> - EXPECT_EQ(close(ipc_sockets[0]), 0);
> -
> - pid = fork();
> - ASSERT_GE(pid, 0);
> - if (pid == 0)
> - crashing_child();
> -
> - pidfd = sys_pidfd_open(pid, 0);
> - ASSERT_GE(pidfd, 0);
> -
> - waitpid(pid, &status, 0);
> - ASSERT_TRUE(WIFSIGNALED(status));
> - ASSERT_FALSE(WCOREDUMP(status));
> -
> - ASSERT_TRUE(get_pidfd_info(pidfd, &info));
> - ASSERT_GT((info.mask & PIDFD_INFO_COREDUMP), 0);
> - ASSERT_GT((info.coredump_mask & PIDFD_COREDUMPED), 0);
> -
> - wait_and_check_coredump_server(pid_coredump_server, _metadata, self);
> -}
> -
> -TEST_F(coredump, socket_request_invalid_flag_combination)
> -{
> - int pidfd, ret, status;
> - pid_t pid, pid_coredump_server;
> - struct pidfd_info info = {};
> - int ipc_sockets[2];
> - char c;
> -
> - ASSERT_TRUE(set_core_pattern("@@/tmp/coredump.socket"));
> -
> - ret = socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, ipc_sockets);
> - ASSERT_EQ(ret, 0);
> -
> - pid_coredump_server = fork();
> - ASSERT_GE(pid_coredump_server, 0);
> - if (pid_coredump_server == 0) {
> - struct coredump_req req = {};
> - int fd_server = -1, fd_coredump = -1, fd_peer_pidfd = -1;
> - int exit_code = EXIT_FAILURE;
> -
> - close(ipc_sockets[0]);
> -
> - fd_server = create_and_listen_unix_socket("/tmp/coredump.socket");
> - if (fd_server < 0)
> - goto out;
> -
> - if (write_nointr(ipc_sockets[1], "1", 1) < 0)
> - goto out;
> -
> - close(ipc_sockets[1]);
> -
> - fd_coredump = accept4(fd_server, NULL, NULL, SOCK_CLOEXEC);
> - if (fd_coredump < 0)
> - goto out;
> -
> - fd_peer_pidfd = get_peer_pidfd(fd_coredump);
> - if (fd_peer_pidfd < 0)
> - goto out;
> -
> - if (!get_pidfd_info(fd_peer_pidfd, &info))
> - goto out;
> -
> - if (!(info.mask & PIDFD_INFO_COREDUMP))
> - goto out;
> -
> - if (!(info.coredump_mask & PIDFD_COREDUMPED))
> - goto out;
> -
> - if (!read_coredump_req(fd_coredump, &req))
> - goto out;
> -
> - if (!check_coredump_req(&req, COREDUMP_ACK_SIZE_VER0,
> - COREDUMP_KERNEL | COREDUMP_USERSPACE |
> - COREDUMP_REJECT | COREDUMP_WAIT))
> - goto out;
> -
> - if (!send_coredump_ack(fd_coredump, &req,
> - COREDUMP_KERNEL | COREDUMP_REJECT | COREDUMP_WAIT, 0))
> - goto out;
> -
> - if (!read_marker(fd_coredump, COREDUMP_MARK_CONFLICTING))
> - goto out;
> -
> - exit_code = EXIT_SUCCESS;
> -out:
> - if (fd_peer_pidfd >= 0)
> - close(fd_peer_pidfd);
> - if (fd_coredump >= 0)
> - close(fd_coredump);
> - if (fd_server >= 0)
> - close(fd_server);
> - _exit(exit_code);
> - }
> - self->pid_coredump_server = pid_coredump_server;
> -
> - EXPECT_EQ(close(ipc_sockets[1]), 0);
> - ASSERT_EQ(read_nointr(ipc_sockets[0], &c, 1), 1);
> - EXPECT_EQ(close(ipc_sockets[0]), 0);
> -
> - pid = fork();
> - ASSERT_GE(pid, 0);
> - if (pid == 0)
> - crashing_child();
> -
> - pidfd = sys_pidfd_open(pid, 0);
> - ASSERT_GE(pidfd, 0);
> -
> - waitpid(pid, &status, 0);
> - ASSERT_TRUE(WIFSIGNALED(status));
> - ASSERT_FALSE(WCOREDUMP(status));
> -
> - ASSERT_TRUE(get_pidfd_info(pidfd, &info));
> - ASSERT_GT((info.mask & PIDFD_INFO_COREDUMP), 0);
> - ASSERT_GT((info.coredump_mask & PIDFD_COREDUMPED), 0);
> -
> - wait_and_check_coredump_server(pid_coredump_server, _metadata, self);
> -}
> -
> -TEST_F(coredump, socket_request_unknown_flag)
> -{
> - int pidfd, ret, status;
> - pid_t pid, pid_coredump_server;
> - struct pidfd_info info = {};
> - int ipc_sockets[2];
> - char c;
> -
> - ASSERT_TRUE(set_core_pattern("@@/tmp/coredump.socket"));
> -
> - ret = socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, ipc_sockets);
> - ASSERT_EQ(ret, 0);
> -
> - pid_coredump_server = fork();
> - ASSERT_GE(pid_coredump_server, 0);
> - if (pid_coredump_server == 0) {
> - struct coredump_req req = {};
> - int fd_server = -1, fd_coredump = -1, fd_peer_pidfd = -1;
> - int exit_code = EXIT_FAILURE;
> -
> - close(ipc_sockets[0]);
> -
> - fd_server = create_and_listen_unix_socket("/tmp/coredump.socket");
> - if (fd_server < 0)
> - goto out;
> -
> - if (write_nointr(ipc_sockets[1], "1", 1) < 0)
> - goto out;
> -
> - close(ipc_sockets[1]);
> -
> - fd_coredump = accept4(fd_server, NULL, NULL, SOCK_CLOEXEC);
> - if (fd_coredump < 0)
> - goto out;
> -
> - fd_peer_pidfd = get_peer_pidfd(fd_coredump);
> - if (fd_peer_pidfd < 0)
> - goto out;
> -
> - if (!get_pidfd_info(fd_peer_pidfd, &info))
> - goto out;
> -
> - if (!(info.mask & PIDFD_INFO_COREDUMP))
> - goto out;
> -
> - if (!(info.coredump_mask & PIDFD_COREDUMPED))
> - goto out;
> -
> - if (!read_coredump_req(fd_coredump, &req))
> - goto out;
> -
> - if (!check_coredump_req(&req, COREDUMP_ACK_SIZE_VER0,
> - COREDUMP_KERNEL | COREDUMP_USERSPACE |
> - COREDUMP_REJECT | COREDUMP_WAIT))
> - goto out;
> -
> - if (!send_coredump_ack(fd_coredump, &req, (1ULL << 63), 0))
> - goto out;
> -
> - if (!read_marker(fd_coredump, COREDUMP_MARK_UNSUPPORTED))
> - goto out;
> -
> - exit_code = EXIT_SUCCESS;
> -out:
> - if (fd_peer_pidfd >= 0)
> - close(fd_peer_pidfd);
> - if (fd_coredump >= 0)
> - close(fd_coredump);
> - if (fd_server >= 0)
> - close(fd_server);
> - _exit(exit_code);
> - }
> - self->pid_coredump_server = pid_coredump_server;
> -
> - EXPECT_EQ(close(ipc_sockets[1]), 0);
> - ASSERT_EQ(read_nointr(ipc_sockets[0], &c, 1), 1);
> - EXPECT_EQ(close(ipc_sockets[0]), 0);
> -
> - pid = fork();
> - ASSERT_GE(pid, 0);
> - if (pid == 0)
> - crashing_child();
> -
> - pidfd = sys_pidfd_open(pid, 0);
> - ASSERT_GE(pidfd, 0);
> -
> - waitpid(pid, &status, 0);
> - ASSERT_TRUE(WIFSIGNALED(status));
> - ASSERT_FALSE(WCOREDUMP(status));
> -
> - ASSERT_TRUE(get_pidfd_info(pidfd, &info));
> - ASSERT_GT((info.mask & PIDFD_INFO_COREDUMP), 0);
> - ASSERT_GT((info.coredump_mask & PIDFD_COREDUMPED), 0);
> -
> - wait_and_check_coredump_server(pid_coredump_server, _metadata, self);
> -}
> -
> -TEST_F(coredump, socket_request_invalid_size_small)
> -{
> - int pidfd, ret, status;
> - pid_t pid, pid_coredump_server;
> - struct pidfd_info info = {};
> - int ipc_sockets[2];
> - char c;
> -
> - ASSERT_TRUE(set_core_pattern("@@/tmp/coredump.socket"));
> -
> - ret = socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, ipc_sockets);
> - ASSERT_EQ(ret, 0);
> -
> - pid_coredump_server = fork();
> - ASSERT_GE(pid_coredump_server, 0);
> - if (pid_coredump_server == 0) {
> - struct coredump_req req = {};
> - int fd_server = -1, fd_coredump = -1, fd_peer_pidfd = -1;
> - int exit_code = EXIT_FAILURE;
> -
> - close(ipc_sockets[0]);
> -
> - fd_server = create_and_listen_unix_socket("/tmp/coredump.socket");
> - if (fd_server < 0)
> - goto out;
> -
> - if (write_nointr(ipc_sockets[1], "1", 1) < 0)
> - goto out;
> -
> - close(ipc_sockets[1]);
> -
> - fd_coredump = accept4(fd_server, NULL, NULL, SOCK_CLOEXEC);
> - if (fd_coredump < 0)
> - goto out;
> -
> - fd_peer_pidfd = get_peer_pidfd(fd_coredump);
> - if (fd_peer_pidfd < 0)
> - goto out;
> -
> - if (!get_pidfd_info(fd_peer_pidfd, &info))
> - goto out;
> -
> - if (!(info.mask & PIDFD_INFO_COREDUMP))
> - goto out;
> -
> - if (!(info.coredump_mask & PIDFD_COREDUMPED))
> - goto out;
> -
> - if (!read_coredump_req(fd_coredump, &req))
> - goto out;
> -
> - if (!check_coredump_req(&req, COREDUMP_ACK_SIZE_VER0,
> - COREDUMP_KERNEL | COREDUMP_USERSPACE |
> - COREDUMP_REJECT | COREDUMP_WAIT))
> - goto out;
> -
> - if (!send_coredump_ack(fd_coredump, &req,
> - COREDUMP_REJECT | COREDUMP_WAIT,
> - COREDUMP_ACK_SIZE_VER0 / 2))
> - goto out;
> -
> - if (!read_marker(fd_coredump, COREDUMP_MARK_MINSIZE))
> - goto out;
> -
> - exit_code = EXIT_SUCCESS;
> -out:
> - if (fd_peer_pidfd >= 0)
> - close(fd_peer_pidfd);
> - if (fd_coredump >= 0)
> - close(fd_coredump);
> - if (fd_server >= 0)
> - close(fd_server);
> - _exit(exit_code);
> - }
> - self->pid_coredump_server = pid_coredump_server;
> -
> - EXPECT_EQ(close(ipc_sockets[1]), 0);
> - ASSERT_EQ(read_nointr(ipc_sockets[0], &c, 1), 1);
> - EXPECT_EQ(close(ipc_sockets[0]), 0);
> -
> - pid = fork();
> - ASSERT_GE(pid, 0);
> - if (pid == 0)
> - crashing_child();
> -
> - pidfd = sys_pidfd_open(pid, 0);
> - ASSERT_GE(pidfd, 0);
> -
> - waitpid(pid, &status, 0);
> - ASSERT_TRUE(WIFSIGNALED(status));
> - ASSERT_FALSE(WCOREDUMP(status));
> -
> - ASSERT_TRUE(get_pidfd_info(pidfd, &info));
> - ASSERT_GT((info.mask & PIDFD_INFO_COREDUMP), 0);
> - ASSERT_GT((info.coredump_mask & PIDFD_COREDUMPED), 0);
> -
> - wait_and_check_coredump_server(pid_coredump_server, _metadata, self);
> -}
> -
> -TEST_F(coredump, socket_request_invalid_size_large)
> -{
> - int pidfd, ret, status;
> - pid_t pid, pid_coredump_server;
> - struct pidfd_info info = {};
> - int ipc_sockets[2];
> - char c;
> -
> - ASSERT_TRUE(set_core_pattern("@@/tmp/coredump.socket"));
> -
> - ret = socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, ipc_sockets);
> - ASSERT_EQ(ret, 0);
> -
> - pid_coredump_server = fork();
> - ASSERT_GE(pid_coredump_server, 0);
> - if (pid_coredump_server == 0) {
> - struct coredump_req req = {};
> - int fd_server = -1, fd_coredump = -1, fd_peer_pidfd = -1;
> - int exit_code = EXIT_FAILURE;
> -
> - close(ipc_sockets[0]);
> -
> - fd_server = create_and_listen_unix_socket("/tmp/coredump.socket");
> - if (fd_server < 0)
> - goto out;
> -
> - if (write_nointr(ipc_sockets[1], "1", 1) < 0)
> - goto out;
> -
> - close(ipc_sockets[1]);
> -
> - fd_coredump = accept4(fd_server, NULL, NULL, SOCK_CLOEXEC);
> - if (fd_coredump < 0)
> - goto out;
> -
> - fd_peer_pidfd = get_peer_pidfd(fd_coredump);
> - if (fd_peer_pidfd < 0)
> - goto out;
> -
> - if (!get_pidfd_info(fd_peer_pidfd, &info))
> - goto out;
> -
> - if (!(info.mask & PIDFD_INFO_COREDUMP))
> - goto out;
> -
> - if (!(info.coredump_mask & PIDFD_COREDUMPED))
> - goto out;
> -
> - if (!read_coredump_req(fd_coredump, &req))
> - goto out;
> -
> - if (!check_coredump_req(&req, COREDUMP_ACK_SIZE_VER0,
> - COREDUMP_KERNEL | COREDUMP_USERSPACE |
> - COREDUMP_REJECT | COREDUMP_WAIT))
> - goto out;
> -
> - if (!send_coredump_ack(fd_coredump, &req,
> - COREDUMP_REJECT | COREDUMP_WAIT,
> - COREDUMP_ACK_SIZE_VER0 + PAGE_SIZE))
> - goto out;
> -
> - if (!read_marker(fd_coredump, COREDUMP_MARK_MAXSIZE))
> - goto out;
> -
> - exit_code = EXIT_SUCCESS;
> -out:
> - if (fd_peer_pidfd >= 0)
> - close(fd_peer_pidfd);
> - if (fd_coredump >= 0)
> - close(fd_coredump);
> - if (fd_server >= 0)
> - close(fd_server);
> - _exit(exit_code);
> - }
> - self->pid_coredump_server = pid_coredump_server;
> -
> - EXPECT_EQ(close(ipc_sockets[1]), 0);
> - ASSERT_EQ(read_nointr(ipc_sockets[0], &c, 1), 1);
> - EXPECT_EQ(close(ipc_sockets[0]), 0);
> -
> - pid = fork();
> - ASSERT_GE(pid, 0);
> - if (pid == 0)
> - crashing_child();
> -
> - pidfd = sys_pidfd_open(pid, 0);
> - ASSERT_GE(pidfd, 0);
> -
> - waitpid(pid, &status, 0);
> - ASSERT_TRUE(WIFSIGNALED(status));
> - ASSERT_FALSE(WCOREDUMP(status));
> -
> - ASSERT_TRUE(get_pidfd_info(pidfd, &info));
> - ASSERT_GT((info.mask & PIDFD_INFO_COREDUMP), 0);
> - ASSERT_GT((info.coredump_mask & PIDFD_COREDUMPED), 0);
> -
> - wait_and_check_coredump_server(pid_coredump_server, _metadata, self);
> -}
> -
> -static int open_coredump_tmpfile(int fd_tmpfs_detached)
> -{
> - return openat(fd_tmpfs_detached, ".", O_TMPFILE | O_RDWR | O_EXCL, 0600);
> -}
> -
> -#define NUM_CRASHING_COREDUMPS 5
> -
> -TEST_F_TIMEOUT(coredump, socket_multiple_crashing_coredumps, 500)
> -{
> - int pidfd[NUM_CRASHING_COREDUMPS], status[NUM_CRASHING_COREDUMPS];
> - pid_t pid[NUM_CRASHING_COREDUMPS], pid_coredump_server;
> - struct pidfd_info info = {};
> - int ipc_sockets[2];
> - char c;
> -
> - ASSERT_TRUE(set_core_pattern("@@/tmp/coredump.socket"));
> -
> - ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, ipc_sockets), 0);
> -
> - pid_coredump_server = fork();
> - ASSERT_GE(pid_coredump_server, 0);
> - if (pid_coredump_server == 0) {
> - int fd_server = -1, fd_coredump = -1, fd_peer_pidfd = -1, fd_core_file = -1;
> - int exit_code = EXIT_FAILURE;
> - struct coredump_req req = {};
> -
> - close(ipc_sockets[0]);
> - fd_server = create_and_listen_unix_socket("/tmp/coredump.socket");
> - if (fd_server < 0) {
> - fprintf(stderr, "Failed to create and listen on unix socket\n");
> - goto out;
> - }
> -
> - if (write_nointr(ipc_sockets[1], "1", 1) < 0) {
> - fprintf(stderr, "Failed to notify parent via ipc socket\n");
> - goto out;
> - }
> - close(ipc_sockets[1]);
> -
> - for (int i = 0; i < NUM_CRASHING_COREDUMPS; i++) {
> - fd_coredump = accept4(fd_server, NULL, NULL, SOCK_CLOEXEC);
> - if (fd_coredump < 0) {
> - fprintf(stderr, "accept4 failed: %m\n");
> - goto out;
> - }
> -
> - fd_peer_pidfd = get_peer_pidfd(fd_coredump);
> - if (fd_peer_pidfd < 0) {
> - fprintf(stderr, "get_peer_pidfd failed for fd %d: %m\n", fd_coredump);
> - goto out;
> - }
> -
> - if (!get_pidfd_info(fd_peer_pidfd, &info)) {
> - fprintf(stderr, "get_pidfd_info failed for fd %d\n", fd_peer_pidfd);
> - goto out;
> - }
> -
> - if (!(info.mask & PIDFD_INFO_COREDUMP)) {
> - fprintf(stderr, "pidfd info missing PIDFD_INFO_COREDUMP for fd %d\n", fd_peer_pidfd);
> - goto out;
> - }
> - if (!(info.coredump_mask & PIDFD_COREDUMPED)) {
> - fprintf(stderr, "pidfd info missing PIDFD_COREDUMPED for fd %d\n", fd_peer_pidfd);
> - goto out;
> - }
> -
> - if (!read_coredump_req(fd_coredump, &req)) {
> - fprintf(stderr, "read_coredump_req failed for fd %d\n", fd_coredump);
> - goto out;
> - }
> -
> - if (!check_coredump_req(&req, COREDUMP_ACK_SIZE_VER0,
> - COREDUMP_KERNEL | COREDUMP_USERSPACE |
> - COREDUMP_REJECT | COREDUMP_WAIT)) {
> - fprintf(stderr, "check_coredump_req failed for fd %d\n", fd_coredump);
> - goto out;
> - }
> -
> - if (!send_coredump_ack(fd_coredump, &req,
> - COREDUMP_KERNEL | COREDUMP_WAIT, 0)) {
> - fprintf(stderr, "send_coredump_ack failed for fd %d\n", fd_coredump);
> - goto out;
> - }
> -
> - if (!read_marker(fd_coredump, COREDUMP_MARK_REQACK)) {
> - fprintf(stderr, "read_marker failed for fd %d\n", fd_coredump);
> - goto out;
> - }
> -
> - fd_core_file = open_coredump_tmpfile(self->fd_tmpfs_detached);
> - if (fd_core_file < 0) {
> - fprintf(stderr, "%m - open_coredump_tmpfile failed for fd %d\n", fd_coredump);
> - goto out;
> - }
> -
> - for (;;) {
> - char buffer[4096];
> - ssize_t bytes_read, bytes_write;
> -
> - bytes_read = read(fd_coredump, buffer, sizeof(buffer));
> - if (bytes_read < 0) {
> - fprintf(stderr, "read failed for fd %d: %m\n", fd_coredump);
> - goto out;
> - }
> -
> - if (bytes_read == 0)
> - break;
> -
> - bytes_write = write(fd_core_file, buffer, bytes_read);
> - if (bytes_read != bytes_write) {
> - fprintf(stderr, "write failed for fd %d: %m\n", fd_core_file);
> - goto out;
> - }
> - }
> -
> - close(fd_core_file);
> - close(fd_peer_pidfd);
> - close(fd_coredump);
> - fd_peer_pidfd = -1;
> - fd_coredump = -1;
> - }
> -
> - exit_code = EXIT_SUCCESS;
> -out:
> - if (fd_core_file >= 0)
> - close(fd_core_file);
> - if (fd_peer_pidfd >= 0)
> - close(fd_peer_pidfd);
> - if (fd_coredump >= 0)
> - close(fd_coredump);
> - if (fd_server >= 0)
> - close(fd_server);
> - _exit(exit_code);
> - }
> - self->pid_coredump_server = pid_coredump_server;
> -
> - EXPECT_EQ(close(ipc_sockets[1]), 0);
> - ASSERT_EQ(read_nointr(ipc_sockets[0], &c, 1), 1);
> - EXPECT_EQ(close(ipc_sockets[0]), 0);
> -
> - for (int i = 0; i < NUM_CRASHING_COREDUMPS; i++) {
> - pid[i] = fork();
> - ASSERT_GE(pid[i], 0);
> - if (pid[i] == 0)
> - crashing_child();
> - pidfd[i] = sys_pidfd_open(pid[i], 0);
> - ASSERT_GE(pidfd[i], 0);
> - }
> -
> - for (int i = 0; i < NUM_CRASHING_COREDUMPS; i++) {
> - waitpid(pid[i], &status[i], 0);
> - ASSERT_TRUE(WIFSIGNALED(status[i]));
> - ASSERT_TRUE(WCOREDUMP(status[i]));
> - }
> -
> - for (int i = 0; i < NUM_CRASHING_COREDUMPS; i++) {
> - info.mask = PIDFD_INFO_EXIT | PIDFD_INFO_COREDUMP;
> - ASSERT_EQ(ioctl(pidfd[i], PIDFD_GET_INFO, &info), 0);
> - ASSERT_GT((info.mask & PIDFD_INFO_COREDUMP), 0);
> - ASSERT_GT((info.coredump_mask & PIDFD_COREDUMPED), 0);
> - }
> -
> - wait_and_check_coredump_server(pid_coredump_server, _metadata, self);
> -}
> -
> -#define MAX_EVENTS 128
> -
> -static void process_coredump_worker(int fd_coredump, int fd_peer_pidfd, int fd_core_file)
> -{
> - int epfd = -1;
> - int exit_code = EXIT_FAILURE;
> -
> - epfd = epoll_create1(0);
> - if (epfd < 0)
> - goto out;
> -
> - struct epoll_event ev;
> - ev.events = EPOLLIN | EPOLLRDHUP | EPOLLET;
> - ev.data.fd = fd_coredump;
> - if (epoll_ctl(epfd, EPOLL_CTL_ADD, fd_coredump, &ev) < 0)
> - goto out;
> -
> - for (;;) {
> - struct epoll_event events[1];
> - int n = epoll_wait(epfd, events, 1, -1);
> - if (n < 0)
> - break;
> -
> - if (events[0].events & (EPOLLIN | EPOLLRDHUP)) {
> - for (;;) {
> - char buffer[4096];
> - ssize_t bytes_read = read(fd_coredump, buffer, sizeof(buffer));
> - if (bytes_read < 0) {
> - if (errno == EAGAIN || errno == EWOULDBLOCK)
> - break;
> - goto out;
> - }
> - if (bytes_read == 0)
> - goto done;
> - ssize_t bytes_write = write(fd_core_file, buffer, bytes_read);
> - if (bytes_write != bytes_read)
> - goto out;
> - }
> - }
> - }
> -
> -done:
> - exit_code = EXIT_SUCCESS;
> -out:
> - if (epfd >= 0)
> - close(epfd);
> - if (fd_core_file >= 0)
> - close(fd_core_file);
> - if (fd_peer_pidfd >= 0)
> - close(fd_peer_pidfd);
> - if (fd_coredump >= 0)
> - close(fd_coredump);
> - _exit(exit_code);
> -}
> -
> -TEST_F_TIMEOUT(coredump, socket_multiple_crashing_coredumps_epoll_workers, 500)
> -{
> - int pidfd[NUM_CRASHING_COREDUMPS], status[NUM_CRASHING_COREDUMPS];
> - pid_t pid[NUM_CRASHING_COREDUMPS], pid_coredump_server, worker_pids[NUM_CRASHING_COREDUMPS];
> - struct pidfd_info info = {};
> - int ipc_sockets[2];
> - char c;
> -
> - ASSERT_TRUE(set_core_pattern("@@/tmp/coredump.socket"));
> - ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, ipc_sockets), 0);
> -
> - pid_coredump_server = fork();
> - ASSERT_GE(pid_coredump_server, 0);
> - if (pid_coredump_server == 0) {
> - int fd_server = -1, exit_code = EXIT_FAILURE, n_conns = 0;
> - fd_server = -1;
> - exit_code = EXIT_FAILURE;
> - n_conns = 0;
> - close(ipc_sockets[0]);
> - fd_server = create_and_listen_unix_socket("/tmp/coredump.socket");
> - if (fd_server < 0)
> - goto out;
> -
> - if (write_nointr(ipc_sockets[1], "1", 1) < 0)
> - goto out;
> - close(ipc_sockets[1]);
> -
> - while (n_conns < NUM_CRASHING_COREDUMPS) {
> - int fd_coredump = -1, fd_peer_pidfd = -1, fd_core_file = -1;
> - struct coredump_req req = {};
> - fd_coredump = accept4(fd_server, NULL, NULL, SOCK_CLOEXEC);
> - if (fd_coredump < 0) {
> - if (errno == EAGAIN || errno == EWOULDBLOCK)
> - continue;
> - goto out;
> - }
> - fd_peer_pidfd = get_peer_pidfd(fd_coredump);
> - if (fd_peer_pidfd < 0)
> - goto out;
> - if (!get_pidfd_info(fd_peer_pidfd, &info))
> - goto out;
> - if (!(info.mask & PIDFD_INFO_COREDUMP) || !(info.coredump_mask & PIDFD_COREDUMPED))
> - goto out;
> - if (!read_coredump_req(fd_coredump, &req))
> - goto out;
> - if (!check_coredump_req(&req, COREDUMP_ACK_SIZE_VER0,
> - COREDUMP_KERNEL | COREDUMP_USERSPACE |
> - COREDUMP_REJECT | COREDUMP_WAIT))
> - goto out;
> - if (!send_coredump_ack(fd_coredump, &req, COREDUMP_KERNEL | COREDUMP_WAIT, 0))
> - goto out;
> - if (!read_marker(fd_coredump, COREDUMP_MARK_REQACK))
> - goto out;
> - fd_core_file = open_coredump_tmpfile(self->fd_tmpfs_detached);
> - if (fd_core_file < 0)
> - goto out;
> - pid_t worker = fork();
> - if (worker == 0) {
> - close(fd_server);
> - process_coredump_worker(fd_coredump, fd_peer_pidfd, fd_core_file);
> - }
> - worker_pids[n_conns] = worker;
> - if (fd_coredump >= 0)
> - close(fd_coredump);
> - if (fd_peer_pidfd >= 0)
> - close(fd_peer_pidfd);
> - if (fd_core_file >= 0)
> - close(fd_core_file);
> - n_conns++;
> - }
> - exit_code = EXIT_SUCCESS;
> -out:
> - if (fd_server >= 0)
> - close(fd_server);
> -
> - // Reap all worker processes
> - for (int i = 0; i < n_conns; i++) {
> - int wstatus;
> - if (waitpid(worker_pids[i], &wstatus, 0) < 0) {
> - fprintf(stderr, "Failed to wait for worker %d: %m\n", worker_pids[i]);
> - } else if (WIFEXITED(wstatus) && WEXITSTATUS(wstatus) != EXIT_SUCCESS) {
> - fprintf(stderr, "Worker %d exited with error code %d\n", worker_pids[i], WEXITSTATUS(wstatus));
> - exit_code = EXIT_FAILURE;
> - }
> - }
> -
> - _exit(exit_code);
> - }
> - self->pid_coredump_server = pid_coredump_server;
> -
> - EXPECT_EQ(close(ipc_sockets[1]), 0);
> - ASSERT_EQ(read_nointr(ipc_sockets[0], &c, 1), 1);
> - EXPECT_EQ(close(ipc_sockets[0]), 0);
> -
> - for (int i = 0; i < NUM_CRASHING_COREDUMPS; i++) {
> - pid[i] = fork();
> - ASSERT_GE(pid[i], 0);
> - if (pid[i] == 0)
> - crashing_child();
> - pidfd[i] = sys_pidfd_open(pid[i], 0);
> - ASSERT_GE(pidfd[i], 0);
> - }
> -
> - for (int i = 0; i < NUM_CRASHING_COREDUMPS; i++) {
> - ASSERT_GE(waitpid(pid[i], &status[i], 0), 0);
> - ASSERT_TRUE(WIFSIGNALED(status[i]));
> - ASSERT_TRUE(WCOREDUMP(status[i]));
> - }
> -
> - for (int i = 0; i < NUM_CRASHING_COREDUMPS; i++) {
> - info.mask = PIDFD_INFO_EXIT | PIDFD_INFO_COREDUMP;
> - ASSERT_EQ(ioctl(pidfd[i], PIDFD_GET_INFO, &info), 0);
> - ASSERT_GT((info.mask & PIDFD_INFO_COREDUMP), 0);
> - ASSERT_GT((info.coredump_mask & PIDFD_COREDUMPED), 0);
> - }
> -
> - wait_and_check_coredump_server(pid_coredump_server, _metadata, self);
> -}
> -
> -TEST_F(coredump, socket_invalid_paths)
> -{
> - ASSERT_FALSE(set_core_pattern("@ /tmp/coredump.socket"));
> - ASSERT_FALSE(set_core_pattern("@/tmp/../coredump.socket"));
> - ASSERT_FALSE(set_core_pattern("@../coredump.socket"));
> - ASSERT_FALSE(set_core_pattern("@/tmp/coredump.socket/.."));
> - ASSERT_FALSE(set_core_pattern("@.."));
> -
> - ASSERT_FALSE(set_core_pattern("@@ /tmp/coredump.socket"));
> - ASSERT_FALSE(set_core_pattern("@@/tmp/../coredump.socket"));
> - ASSERT_FALSE(set_core_pattern("@@../coredump.socket"));
> - ASSERT_FALSE(set_core_pattern("@@/tmp/coredump.socket/.."));
> - ASSERT_FALSE(set_core_pattern("@@.."));
> -
> - ASSERT_FALSE(set_core_pattern("@@@/tmp/coredump.socket"));
> -}
> -
> TEST_HARNESS_MAIN
>
> --
> 2.47.3
>
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