The coredump.socket_detect_userspace_client test occasionally fails: # RUN coredump.socket_detect_userspace_client ... # stackdump_test.c:500:socket_detect_userspace_client:Expected 0 (0) != WIFEXITED(status) (0) # socket_detect_userspace_client: Test terminated by assertion # FAIL coredump.socket_detect_userspace_client not ok 3 coredump.socket_detect_userspace_client

because there is no guarantee that client's write() happens before server's close(). The client gets terminated SIGPIPE, and thus the test fails.

Add a read() to server to make sure server's close() doesn't happen before client's write().

Fixes: 7b6724fe9a6b ("selftests/coredump: add tests for AF_UNIX coredumps") Signed-off-by: Nam Cao namcao@linutronix.de --- tools/testing/selftests/coredump/stackdump_test.c | 5 +++++ 1 file changed, 5 insertions(+)

diff --git a/tools/testing/selftests/coredump/stackdump_test.c b/tools/testing/selftests/coredump/stackdump_test.c index 9984413be9f06..68f8e479ac368 100644 --- a/tools/testing/selftests/coredump/stackdump_test.c +++ b/tools/testing/selftests/coredump/stackdump_test.c @@ -461,10 +461,15 @@ TEST_F(coredump, socket_detect_userspace_client) _exit(EXIT_FAILURE); }

+ ret = read(fd_coredump, &c, 1); + close(fd_coredump); close(fd_server); close(fd_peer_pidfd); close(fd_core_file); + + if (ret < 1) + _exit(EXIT_FAILURE); _exit(EXIT_SUCCESS); } self->pid_coredump_server = pid_coredump_server;