The user_notification_wait_killable_after_reply test fails due to an unhandled error when a traced syscall is interrupted by a signal.
When a signal arrives after the tracer has received a seccomp notification but before it has replied, the notification can become stale. Any subsequent reply (like with SECCOMP_IOCTL_NOTIF_ADDFD) will fail with -ENOENT. This patch fixes the test by handling the -ENOENT return value from SECCOMP_IOCTL_NOTIF_ADDFD, preventing the test from failing incorrectly. The loop counter is decremented to re-run the iteration for the restarted syscall. Signed-off-by: Wake Liu <[email protected]> --- tools/testing/selftests/seccomp/seccomp_bpf.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/seccomp/seccomp_bpf.c b/tools/testing/selftests/seccomp/seccomp_bpf.c index 574fdd102eb5..c3e598c9c4ee 100644 --- a/tools/testing/selftests/seccomp/seccomp_bpf.c +++ b/tools/testing/selftests/seccomp/seccomp_bpf.c @@ -5048,8 +5048,12 @@ TEST(user_notification_wait_killable_after_reply) addfd.id = req.id; addfd.flags = SECCOMP_ADDFD_FLAG_SEND; addfd.srcfd = 0; - ASSERT_GE(ioctl(listener, SECCOMP_IOCTL_NOTIF_ADDFD, &addfd), 0) - kill(pid, SIGKILL); + ret = ioctl(listener, SECCOMP_IOCTL_NOTIF_ADDFD, &addfd); + if (ret < 0 && errno == ENOENT) { + i--; + continue; + } + ASSERT_GE(ret, 0); } /* -- 2.52.0.rc1.455.g30608eb744-goog
