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-rw-r--r--security/keys/gc.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/security/keys/gc.c b/security/keys/gc.c
index bf4d8da5a79..a42b45531aa 100644
--- a/security/keys/gc.c
+++ b/security/keys/gc.c
@@ -145,7 +145,9 @@ static void key_gc_keyring(struct key *keyring, time_t limit)
if (!klist)
goto unlock_dont_gc;
- for (loop = klist->nkeys - 1; loop >= 0; loop--) {
+ loop = klist->nkeys;
+ smp_rmb();
+ for (loop--; loop >= 0; loop--) {
key = klist->keys[loop];
if (test_bit(KEY_FLAG_DEAD, &key->flags) ||
(key->expiry > 0 && key->expiry <= limit))