[LTP] [PATCH 2/2] syscalls/utimensat01: add exception for Ubuntu 4.4 kernel

[Po-Hsu Lin]

Ubuntu 4.4 kernel got this patch (b3b4283) since 4.4.0-48.69,
therefore it will return EPERM instead of EACCES.

Without this fix, the test will fail on Ubuntu 4.4 kernel with:
  FAIL: 18: utimensat() failed with incorrect error, expected EACCES: EPERM (1)
  FAIL: 19: utimensat() failed with incorrect error, expected EACCES: EPERM (1)

Signed-off-by: Po-Hsu Lin <po-hsu.lin@canonical.com>
---
 testcases/kernel/syscalls/utimensat/utimensat01.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/testcases/kernel/syscalls/utimensat/utimensat01.c b/testcases/kernel/syscalls/utimensat/utimensat01.c
index 7dabfed6d..469cb61c5 100644
--- a/testcases/kernel/syscalls/utimensat/utimensat01.c
+++ b/testcases/kernel/syscalls/utimensat/utimensat01.c
@@ -158,6 +158,10 @@ static void tst_multi_set_time(enum tst_ts_type type, struct mytime *mytime)
 
 static void update_error(struct test_case *tc)
 {
+	static struct tst_kern_exv kvers[] = {
+		{ "UBUNTU", "4.4.0-48.69" },
+	};
+
 	if (tc->exp_err != -1)
 		return;
 
@@ -167,9 +171,12 @@ static void update_error(struct test_case *tc)
 	 * This patch has also been merged to stable 4.4 with
 	 * b3b4283 ("vfs: move permission checking into notify_change() for utimes(NULL)")
 	 */
-	if (tst_kvercmp(4, 4, 27) < 0)
+	if (tst_kvercmp(4, 4, 27) < 0) {
 		tc->exp_err = EACCES;
-	else
+		// Special case for Ubuntu kernel, which got this patch since 4.4.0-48.69
+		if (tst_kvercmp2(4, 4, 0, kvers))
+			tc->exp_err = EPERM;
+	} else
 		tc->exp_err = EPERM;
 }
 
-- 
2.17.1