[LTP] [PATCH v2 1/3] commands/keyctl01: Fix potential infinite loop

[Guangwen Feng]

End the loop once the max key quota is less than zero, in case
some errors happen and result in endless loop.

We expect the test to trigger key quota excess which breaks the
loop but it may not happen, so add a TWARN message for this.

Signed-off-by: Guangwen Feng <fenggw-fnst@cn.fujitsu.com>
---
 testcases/commands/keyctl/keyctl01.sh | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/testcases/commands/keyctl/keyctl01.sh b/testcases/commands/keyctl/keyctl01.sh
index 690fbbf..238b117 100644
--- a/testcases/commands/keyctl/keyctl01.sh
+++ b/testcases/commands/keyctl/keyctl01.sh
@@ -61,15 +61,17 @@ cleanup()
 
 do_test()
 {
+	local quota_excd=0
 	local maxkeysz=$((ORIG_KEYSZ + 100))
 
-	while true
+	while [ $maxkeysz -ge 0 ]
 	do
 		echo $maxkeysz >$PATH_KEYQUOTA
 
 		keyctl request2 user debug:fred negate @t >temp 2>&1
 		grep -q -E "quota exceeded" temp
 		if [ $? -eq 0 ]; then
+			quota_excd=1
 			break
 		fi
 
@@ -82,6 +84,10 @@ do_test()
 		((maxkeysz -= 4))
 	done
 
+	if [ $quota_excd -eq 0 ]; then
+		tst_res TWARN "Failed to trigger the quota excess"
+	fi
+
 	tst_res TPASS "Bug not reproduced"
 }
 
-- 
2.9.4