linux-kernel - [PATCH 14/22] selftests/coredump: fix userspace client detection

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Message-Id: <20251028-work-coredump-signal-v1-14-ca449b7b7aa0@kernel.org>
Date: Tue, 28 Oct 2025 09:45:59 +0100
From: Christian Brauner <brauner@...nel.org>
To: linux-fsdevel@...r.kernel.org
Cc: 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>, 
 Alexander Mikhalitsyn <alexander@...alicyn.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>, 
 Christian Brauner <brauner@...nel.org>
Subject: [PATCH 14/22] selftests/coredump: fix userspace client detection

We need to request PIDFD_INFO_COREDUMP in the first place.

Signed-off-by: Christian Brauner <brauner@...nel.org>
---
 tools/testing/selftests/coredump/coredump_socket_test.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/coredump/coredump_socket_test.c b/tools/testing/selftests/coredump/coredump_socket_test.c
index d5ad0e696ab3..658f3966064f 100644
--- a/tools/testing/selftests/coredump/coredump_socket_test.c
+++ b/tools/testing/selftests/coredump/coredump_socket_test.c
@@ -188,7 +188,9 @@ TEST_F(coredump, socket_detect_userspace_client)
 	int pidfd, ret, status;
 	pid_t pid, pid_coredump_server;
 	struct stat st;
-	struct pidfd_info info = {};
+	struct pidfd_info info = {
+		.mask = PIDFD_INFO_COREDUMP,
+	};
 	int ipc_sockets[2];
 	char c;
 

-- 
2.47.3