[LTP] [PATCH v2 1/1] [STAGING] ioctl_pidfd06: accept EREMOTE/ESRCH for PIDFD_GET_INFO across pidns

[Jan Polensky]

PIDFD_GET_INFO semantics changed for pidfds referring to tasks without a PID
in the caller's current pid namespace (commit ab89060fbc92e ("pidfs: return
-EREMOTE when PIDFD_GET_INFO is called on another ns")).

Accept both errnos to keep the test working on kernels with and without the
change (including backports).

Signed-off-by: Jan Polensky <japo@linux.ibm.com>
---
 testcases/kernel/syscalls/ioctl/ioctl_pidfd06.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/testcases/kernel/syscalls/ioctl/ioctl_pidfd06.c b/testcases/kernel/syscalls/ioctl/ioctl_pidfd06.c
index 751281bacb74..6b4bc3191e37 100644
--- a/testcases/kernel/syscalls/ioctl/ioctl_pidfd06.c
+++ b/testcases/kernel/syscalls/ioctl/ioctl_pidfd06.c
@@ -14,6 +14,7 @@
 
 static struct tst_clone_args *args;
 static struct pidfd_info *info;
+static const int exp_errnos[] = {EREMOTE, ESRCH};
 
 static void run(void)
 {
@@ -41,7 +42,8 @@ static void run(void)
 	args->exit_signal = SIGCHLD;
 
 	if (!SAFE_CLONE(args)) {
-		TST_EXP_FAIL(ioctl(pidfd, PIDFD_GET_INFO, info), ESRCH);
+		TST_EXP_FAIL_ARR(ioctl(pidfd, PIDFD_GET_INFO, info), exp_errnos,
+				ARRAY_SIZE(exp_errnos));
 		exit(0);
 	}
 
-- 
2.53.0