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authorTakashi Iwai <tiwai@suse.de>2014-12-04 20:25:19 +0300
committerJiri Slaby <jslaby@suse.cz>2015-01-07 19:55:06 +0300
commitd9135d9e6aa11beb51b98342efb1a87987269622 (patch)
treeb77340ca3fafe88e0d8e5c4c2a48b462c696d0da /security
parent2329c797a9dc66982946026cbc1783e072ab8e33 (diff)
downloadlinux-d9135d9e6aa11beb51b98342efb1a87987269622.tar.xz
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>
Diffstat (limited to 'security')
-rw-r--r--security/keys/encrypted-keys/encrypted.c5
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;