lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Sat, 17 Dec 2022 19:47:50 +0000 From: Arseniy Krasnov <AVKrasnov@...rdevices.ru> To: Stefano Garzarella <sgarzare@...hat.com>, Stefan Hajnoczi <stefanha@...hat.com>, "edumazet@...gle.com" <edumazet@...gle.com>, "David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com> CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "netdev@...r.kernel.org" <netdev@...r.kernel.org>, "virtualization@...ts.linux-foundation.org" <virtualization@...ts.linux-foundation.org>, "kvm@...r.kernel.org" <kvm@...r.kernel.org>, kernel <kernel@...rdevices.ru>, Krasnov Arseniy <oxffffaa@...il.com>, Arseniy Krasnov <AVKrasnov@...rdevices.ru> Subject: [RFC PATCH v1 2/2] vsock_test: mutual hungup reproducer This is not for merge, just demo. Signed-off-by: Arseniy Krasnov <AVKrasnov@...rdevices.ru> --- tools/testing/vsock/vsock_test.c | 78 ++++++++++++++++++++++++++++++++ 1 file changed, 78 insertions(+) diff --git a/tools/testing/vsock/vsock_test.c b/tools/testing/vsock/vsock_test.c index bb6d691cb30d..320ecf4db74b 100644 --- a/tools/testing/vsock/vsock_test.c +++ b/tools/testing/vsock/vsock_test.c @@ -699,7 +699,85 @@ static void test_stream_poll_rcvlowat_client(const struct test_opts *opts) close(fd); } +static void test_stall_client(const struct test_opts *opts) +{ + int fd; + unsigned long lowat_val = 128*1024; + size_t data_size = 64 * 1024; + void *data; + + + fd = vsock_stream_connect(opts->peer_cid, 1234); + assert(fd != -1); + + assert(!setsockopt(fd, SOL_SOCKET, SO_RCVLOWAT, + &lowat_val, sizeof(lowat_val))); + + data = malloc(data_size); + assert(data); + + /* Wait for tx to send data. */ + sleep(3); + + while (1) { + struct pollfd fds = {0}; + + fds.fd = fd; + fds.events = POLLIN | POLLRDNORM | POLLERR | POLLRDHUP | POLLHUP; + + /* Try to wait for 1 sec. */ + printf("[RX] ENTER POLL\n"); + assert(poll(&fds, 1, -1) >= 0); + printf("[RX] LEAVE POLL\n"); + + if (fds.revents & (POLLIN | POLLRDNORM)) { + read(fd, data, data_size); + } + + if (fds.revents & POLLERR) { + printf("[RX] POLL ERR\n"); + break; + } + + if (fds.revents & (POLLRDHUP | POLLHUP)) { + printf("[RX] POLL DONE\n"); + break; + } + } + + close(fd); + exit(0); +} + +static void test_stall_server(const struct test_opts *opts) +{ + size_t data_size = (256 * 1024) + 1; + void *data; + int fd; + + fd = vsock_stream_accept(VMADDR_CID_ANY, 1234, NULL); + assert(fd != -1); + + data = malloc(data_size); + assert(data); + + printf("[TX] ENTER WRITE\n"); + assert(write(fd, data, data_size) == data_size); + + /* Never get here without kernel patch. */ + printf("[TX] LEAVE WRITE\n"); + + close(fd); + exit(0); +} + + static struct test_case test_cases[] = { + { + .name = "Test stall", + .run_client = test_stall_client, + .run_server = test_stall_server, + }, { .name = "SOCK_STREAM connection reset", .run_client = test_stream_connection_reset, -- 2.25.1
Powered by blists - more mailing lists