4.18-stable review patch. If anyone has any objections, please let me know.
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From: Eric Biggers ebiggers@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 ebiggers@google.com Signed-off-by: James Morris james.morris@microsoft.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- security/security.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/security/security.c +++ b/security/security.c @@ -118,6 +118,8 @@ static int lsm_append(char *new, char **
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))