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KEYS: Fix stale key registration at error path

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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: Zefan Li <lizefan@huawei.com>
This commit is contained in:
Takashi Iwai 2014-12-04 18:25:19 +01:00 committed by Zefan Li
parent db84e0afa4
commit 187c38d0b6
1 changed files with 4 additions and 1 deletions
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5
security/keys/encrypted-keys/encrypted.c
View file

@ -1016,10 +1016,13 @@ 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;