[LTP] [PATCH] security/dirtyc0w: Get and set umask in setup

[Zou Wei]

The case is only successful when system default umask is 0022.
When umask is 0077, should change the value to 0022 in setup.

Signed-off-by: Zou Wei <zou_wei@huawei.com>
---
 testcases/kernel/security/dirtyc0w/dirtyc0w.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/testcases/kernel/security/dirtyc0w/dirtyc0w.c b/testcases/kernel/security/dirtyc0w/dirtyc0w.c
index a0a81b6..7abb5a2 100644
--- a/testcases/kernel/security/dirtyc0w/dirtyc0w.c
+++ b/testcases/kernel/security/dirtyc0w/dirtyc0w.c
@@ -45,6 +45,10 @@ static void setup(void)
 {
 	struct passwd *pw;

+	if ((umask(0))==63){
+		umask(18);
+	}
+
 	pw = SAFE_GETPWNAM("nobody");

 	nobody_uid = pw->pw_uid;
--
2.6.2