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authorDavid Howells <dhowells@redhat.com>2010-08-06 11:08:27 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2010-08-06 12:17:02 -0400
commit1e456a124353a753e9d1fadfbf5cd459c2f197ae (patch)
tree4977d4fa275faafc0ba99a635d4c853a1f0df2a1 /security
parentfc1caf6eafb30ea185720e29f7f5eccca61ecd60 (diff)
KEYS: request_key() should return -ENOKEY if the constructed key is negative
request_key() should return -ENOKEY if the key it constructs has been negatively instantiated. Without this, request_key() can return an unusable key to its caller, and if the caller then does key_validate() that won't catch the problem. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'security')
-rw-r--r--security/keys/request_key.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/security/keys/request_key.c b/security/keys/request_key.c
index 0d26f689bd77..0088dd8bf68a 100644
--- a/security/keys/request_key.c
+++ b/security/keys/request_key.c
@@ -537,6 +537,8 @@ int wait_for_key_construction(struct key *key, bool intr)
537 intr ? TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE); 537 intr ? TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE);
538 if (ret < 0) 538 if (ret < 0)
539 return ret; 539 return ret;
540 if (test_bit(KEY_FLAG_NEGATIVE, &key->flags))
541 return -ENOKEY;
540 return key_validate(key); 542 return key_validate(key);
541} 543}
542EXPORT_SYMBOL(wait_for_key_construction); 544EXPORT_SYMBOL(wait_for_key_construction);