diff options
Diffstat (limited to 'security')
| -rw-r--r-- | security/keys/gc.c | 4 | ||||
| -rw-r--r-- | security/keys/key.c | 5 |
2 files changed, 5 insertions, 4 deletions
diff --git a/security/keys/gc.c b/security/keys/gc.c index f27223ea4578..748e83818a76 100644 --- a/security/keys/gc.c +++ b/security/keys/gc.c @@ -218,8 +218,8 @@ continue_scanning: key = rb_entry(cursor, struct key, serial_node); cursor = rb_next(cursor); - if (test_bit(KEY_FLAG_FINAL_PUT, &key->flags)) { - smp_mb(); /* Clobber key->user after FINAL_PUT seen. */ + if (!test_bit_acquire(KEY_FLAG_USER_ALIVE, &key->flags)) { + /* Clobber key->user after final put seen. */ goto found_unreferenced_key; } diff --git a/security/keys/key.c b/security/keys/key.c index 7198cd2ac3a3..3bbdde778631 100644 --- a/security/keys/key.c +++ b/security/keys/key.c @@ -298,6 +298,7 @@ struct key *key_alloc(struct key_type *type, const char *desc, key->restrict_link = restrict_link; key->last_used_at = ktime_get_real_seconds(); + key->flags |= 1 << KEY_FLAG_USER_ALIVE; if (!(flags & KEY_ALLOC_NOT_IN_QUOTA)) key->flags |= 1 << KEY_FLAG_IN_QUOTA; if (flags & KEY_ALLOC_BUILT_IN) @@ -658,8 +659,8 @@ void key_put(struct key *key) key->user->qnbytes -= key->quotalen; spin_unlock_irqrestore(&key->user->lock, flags); } - smp_mb(); /* key->user before FINAL_PUT set. */ - set_bit(KEY_FLAG_FINAL_PUT, &key->flags); + /* Mark key as safe for GC after key->user done. */ + clear_bit_unlock(KEY_FLAG_USER_ALIVE, &key->flags); schedule_work(&key_gc_work); } } |