# \[PATCH v2\] LSM: add NULL check for kcalloc()

- From: Austin Kim \<hidden\>
- Date: 2021-07-14 21:51:34 
- List: linux-security-module
- Page: https://ratatoskr.run/linux-security-module/2021/07/1445045
- Thread: https://ratatoskr.run/linux-security-module/2021/07/1445045/t.md

```text
From: Austin Kim <redacted>

kcalloc() may return NULL when memory allocation fails.
So it is necessary to add NULL check after the call to kcalloc() is made.

Signed-off-by: Austin Kim <redacted>
---
 security/security.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/security/security.c b/security/security.c
index 09533cbb7221..f885c9e9bc35 100644
--- a/security/security.c
+++ b/security/security.c
@@ -321,6 +321,8 @@ static void __init ordered_lsm_init(void)
 
 	ordered_lsms = kcalloc(LSM_COUNT + 1, sizeof(*ordered_lsms),
 				GFP_KERNEL);
+	if (!ordered_lsms)
+		return;
 
 	if (chosen_lsm_order) {
 		if (chosen_major_lsm) {
-- 
2.20.1

```