[PATCH AUTOSEL 4.14 11/57] security: check for kstrdup() failure in lsm_append()

[Sasha Levin]

From: Eric Biggers <ebigg...@google.com>

[ Upstream commit 87ea58433208d17295e200d56be5e2a4fe4ce7d6 ]

lsm_append() should return -ENOMEM if memory allocation failed.

Fixes: d69dece5f5b6 ("LSM: Add /sys/kernel/security/lsm")
Signed-off-by: Eric Biggers <ebigg...@google.com>
Signed-off-by: James Morris <james.mor...@microsoft.com>
Signed-off-by: Sasha Levin <alexander.le...@microsoft.com>
---
 security/security.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/security/security.c b/security/security.c
index 4bf0f571b4ef..95a1a0f52880 100644
--- a/security/security.c
+++ b/security/security.c
@@ -111,6 +111,8 @@ static int lsm_append(char *new, char **result)
 
        if (*result == NULL) {
                *result = kstrdup(new, GFP_KERNEL);
+               if (*result == NULL)
+                       return -ENOMEM;
        } else {
                /* Check if it is the last registered name */
                if (match_last_lsm(*result, new))
-- 
2.17.1