[LTP] [PATCH] Disable io_uring fd in ioctl_pidfd01 for selinux

[Andrea Cervesato]

From: Andrea Cervesato <andrea.cervesato@suse.com>

Disable io_uring bad file descriptor in ioctl_pidfd01 when SELinux is
enabled with enforcing mode. The reason is that SELinux inhibits usage
of the io_uring file descriptor with EACCESS, causing test to fail
without a real underlying bug.

Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.com>
---
ioctl_pidfd01.c:37: TINFO: io uring -> ...
ioctl_pidfd01.c:28: TFAIL: ioctl(io uring, PIDFD_GET_INFO, info) expected EINVAL, EBADF, ENOTTY: EACCES (13)
---
 testcases/kernel/syscalls/ioctl/ioctl_pidfd01.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/testcases/kernel/syscalls/ioctl/ioctl_pidfd01.c b/testcases/kernel/syscalls/ioctl/ioctl_pidfd01.c
index 92c51c6c0d0dcbb2308c1a8d82b2a92650f3a6b3..1ccb4bcd8a5d4283d29e0a005aef57fbb6753759 100644
--- a/testcases/kernel/syscalls/ioctl/ioctl_pidfd01.c
+++ b/testcases/kernel/syscalls/ioctl/ioctl_pidfd01.c
@@ -17,6 +17,7 @@ static int exp_errnos[] = {
 };
 
 static struct pidfd_info *info;
+static int selinux_enforcing;
 
 static void test_bad_pidfd(struct tst_fd *fd_in)
 {
@@ -25,6 +26,11 @@ static void test_bad_pidfd(struct tst_fd *fd_in)
 		return;
 	}
 
+	if (fd_in->type == TST_FD_IO_URING && selinux_enforcing) {
+		tst_res(TINFO, "Skipping io_uring: SELinux enforcing enabled");
+		return;
+	}
+
 	TST_EXP_FAIL_ARR(ioctl(fd_in->fd, PIDFD_GET_INFO, info),
 		  exp_errnos, ARRAY_SIZE(exp_errnos),
 		  "ioctl(%s, PIDFD_GET_INFO, info)",
@@ -44,6 +50,8 @@ static void setup(void)
 	if (!ioctl_pidfd_info_exit_supported())
 		tst_brk(TCONF, "PIDFD_INFO_EXIT is not supported by ioctl()");
 
+	selinux_enforcing = tst_selinux_enforcing();
+
 	info->mask = PIDFD_INFO_EXIT;
 }
 

---
base-commit: 91e6272febf95e19a8300695dfc2089569adf9d8
change-id: 20250729-ioctl_pidfd01_selinux-1479ea457850

Best regards,
-- 
Andrea Cervesato <andrea.cervesato@suse.com>