From f7b48cf08fa63a68b59c2894806ee478216d7f91 Mon Sep 17 00:00:00 2001 From: Eric Biggers Date: Thu, 21 Sep 2017 13:57:41 -0700 Subject: KEYS: don't revoke uninstantiated key in request_key_auth_new() If key_instantiate_and_link() were to fail (which fortunately isn't possible currently), the call to key_revoke(authkey) would crash with a NULL pointer dereference in request_key_auth_revoke() because the key has not yet been instantiated. Fix this by removing the call to key_revoke(). key_put() is sufficient, as it's not possible for an uninstantiated authkey to have been used for anything yet. Fixes: b5f545c880a2 ("[PATCH] keys: Permit running process to instantiate keys") Signed-off-by: Eric Biggers Signed-off-by: David Howells --- security/keys/request_key_auth.c | 1 - 1 file changed, 1 deletion(-) (limited to 'security/keys') diff --git a/security/keys/request_key_auth.c b/security/keys/request_key_auth.c index 69d6b3b35470..e356075ed2f8 100644 --- a/security/keys/request_key_auth.c +++ b/security/keys/request_key_auth.c @@ -220,7 +220,6 @@ struct key *request_key_auth_new(struct key *target, const void *callout_info, return authkey; error_put_authkey: - key_revoke(authkey); key_put(authkey); error_free_rka: free_request_key_auth(rka); -- cgit