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-rw-r--r--security/keys/gc.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/security/keys/gc.c b/security/keys/gc.c
index 19902319d097..a46e825cbf02 100644
--- a/security/keys/gc.c
+++ b/security/keys/gc.c
@@ -77,10 +77,10 @@ static bool key_gc_keyring(struct key *keyring, time_t limit)
77 goto dont_gc; 77 goto dont_gc;
78 78
79 /* scan the keyring looking for dead keys */ 79 /* scan the keyring looking for dead keys */
80 klist = rcu_dereference_check(keyring->payload.subscriptions, 80 rcu_read_lock();
81 lockdep_is_held(&key_serial_lock)); 81 klist = rcu_dereference(keyring->payload.subscriptions);
82 if (!klist) 82 if (!klist)
83 goto dont_gc; 83 goto unlock_dont_gc;
84 84
85 for (loop = klist->nkeys - 1; loop >= 0; loop--) { 85 for (loop = klist->nkeys - 1; loop >= 0; loop--) {
86 key = klist->keys[loop]; 86 key = klist->keys[loop];
@@ -89,11 +89,14 @@ static bool key_gc_keyring(struct key *keyring, time_t limit)
89 goto do_gc; 89 goto do_gc;
90 } 90 }
91 91
92unlock_dont_gc:
93 rcu_read_unlock();
92dont_gc: 94dont_gc:
93 kleave(" = false"); 95 kleave(" = false");
94 return false; 96 return false;
95 97
96do_gc: 98do_gc:
99 rcu_read_unlock();
97 key_gc_cursor = keyring->serial; 100 key_gc_cursor = keyring->serial;
98 key_get(keyring); 101 key_get(keyring);
99 spin_unlock(&key_serial_lock); 102 spin_unlock(&key_serial_lock);