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| author | Takashi Iwai <tiwai@suse.de> | 2014-12-04 18:25:19 +0100 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2015-01-07 17:55:06 +0100 |
| commit | d9135d9e6aa11beb51b98342efb1a87987269622 (patch) | |
| tree | b77340ca3fafe88e0d8e5c4c2a48b462c696d0da | |
| parent | 2329c797a9dc66982946026cbc1783e072ab8e33 (diff) | |
| download | lwn-d9135d9e6aa11beb51b98342efb1a87987269622.tar.gz lwn-d9135d9e6aa11beb51b98342efb1a87987269622.zip | |
KEYS: Fix stale key registration at error path
commit b26bdde5bb27f3f900e25a95e33a0c476c8c2c48 upstream.
When loading encrypted-keys module, if the last check of
aes_get_sizes() in init_encrypted() fails, the driver just returns an
error without unregistering its key type. This results in the stale
entry in the list. In addition to memory leaks, this leads to a kernel
crash when registering a new key type later.
This patch fixes the problem by swapping the calls of aes_get_sizes()
and register_key_type(), and releasing resources properly at the error
paths.
Bugzilla: https://bugzilla.opensuse.org/show_bug.cgi?id=908163
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
| -rw-r--r-- | security/keys/encrypted-keys/encrypted.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/security/keys/encrypted-keys/encrypted.c b/security/keys/encrypted-keys/encrypted.c index 9e1e005c7596..c4c8df4b214d 100644 --- a/security/keys/encrypted-keys/encrypted.c +++ b/security/keys/encrypted-keys/encrypted.c @@ -1018,10 +1018,13 @@ static int __init init_encrypted(void) ret = encrypted_shash_alloc(); if (ret < 0) return ret; + ret = aes_get_sizes(); + if (ret < 0) + goto out; ret = register_key_type(&key_type_encrypted); if (ret < 0) goto out; - return aes_get_sizes(); + return 0; out: encrypted_shash_release(); return ret; |