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eCryptfs: ecryptfs_keyring_auth_tok_for_sig() bug fix

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The pointer '(*auth_tok_key)' is set to NULL in case request_key()
fails, in order to prevent its use by functions calling
ecryptfs_keyring_auth_tok_for_sig().

Signed-off-by: Roberto Sassu <roberto.sassu@polito.it>
Cc: <stable@kernel.org>
Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
This commit is contained in:
Roberto Sassu 2011-03-17 12:48:50 +01:00 committed by Tyler Hicks
parent 50f198ae16
commit 1821df040a
1 changed files with 1 additions and 0 deletions
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fs/ecryptfs/keystore.c
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@ -1563,6 +1563,7 @@ int ecryptfs_keyring_auth_tok_for_sig(struct key **auth_tok_key,
printk(KERN_ERR "Could not find key with description: [%s]\n", printk(KERN_ERR "Could not find key with description: [%s]\n",
sig); sig);
rc = process_request_key_err(PTR_ERR(*auth_tok_key)); rc = process_request_key_err(PTR_ERR(*auth_tok_key));
(*auth_tok_key) = NULL;
goto out; goto out;
} }
(*auth_tok) = ecryptfs_get_key_payload_data(*auth_tok_key); (*auth_tok) = ecryptfs_get_key_payload_data(*auth_tok_key);