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eCryptfs: Validate global auth tok keys

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When searching through the global authentication tokens for a given key
signature, verify that a matching key has not been revoked and has not
expired.  This allows the `keyctl revoke` command to be properly used on
keys in use by eCryptfs.

Acked-by: Serge Hallyn <serue@us.ibm.com>
Cc: ecryptfs-devel@lists.launchpad.net
Cc: stable <stable@kernel.org>
Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
This commit is contained in:
Tyler Hicks 2009-08-26 01:54:56 -05:00
parent df6ad33ba1
commit 3891959846
1 changed files with 3 additions and 1 deletions
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4
fs/ecryptfs/keystore.c
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@ -416,7 +416,9 @@ ecryptfs_find_global_auth_tok_for_sig(
&mount_crypt_stat->global_auth_tok_list,
mount_crypt_stat_list) {
if (memcmp(walker->sig, sig, ECRYPTFS_SIG_SIZE_HEX) == 0) {
(*global_auth_tok) = walker;
rc = key_validate(walker->global_auth_tok_key);
if (!rc)
(*global_auth_tok) = walker;
goto out;
}
}