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authorTyler Hicks <tyhicks@linux.vnet.ibm.com>2009-08-11 09:36:32 +0400
committerTyler Hicks <tyhicks@linux.vnet.ibm.com>2009-09-23 18:10:31 +0400
commitb0105eaefa7cce8f4a941d0fc6354b250d30e745 (patch)
tree60bed48ff88aa22d9ee36b64d23421cf9e50d2a8 /fs/ecryptfs
parent382684984e93039a3bbd83b04d341b0ceb831519 (diff)
downloadlinux-b0105eaefa7cce8f4a941d0fc6354b250d30e745.tar.xz
eCryptfs: Handle unrecognized tag 3 cipher codes
Returns an error when an unrecognized cipher code is present in a tag 3 packet or an ecryptfs_crypt_stat cannot be initialized. Also sets an crypt_stat->tfm error pointer to NULL to ensure that it will not be incorrectly freed in ecryptfs_destroy_crypt_stat(). 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>
Diffstat (limited to 'fs/ecryptfs')
-rw-r--r--fs/ecryptfs/crypto.c1
-rw-r--r--fs/ecryptfs/keystore.c10
2 files changed, 8 insertions, 3 deletions
diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c
index 931f715827ac..f92370aa5704 100644
--- a/fs/ecryptfs/crypto.c
+++ b/fs/ecryptfs/crypto.c
@@ -795,6 +795,7 @@ int ecryptfs_init_crypt_ctx(struct ecryptfs_crypt_stat *crypt_stat)
kfree(full_alg_name);
if (IS_ERR(crypt_stat->tfm)) {
rc = PTR_ERR(crypt_stat->tfm);
+ crypt_stat->tfm = NULL;
ecryptfs_printk(KERN_ERR, "cryptfs: init_crypt_ctx(): "
"Error initializing cipher [%s]\n",
crypt_stat->cipher);
diff --git a/fs/ecryptfs/keystore.c b/fs/ecryptfs/keystore.c
index f9965139c430..3a61f056acf6 100644
--- a/fs/ecryptfs/keystore.c
+++ b/fs/ecryptfs/keystore.c
@@ -1316,8 +1316,10 @@ parse_tag_3_packet(struct ecryptfs_crypt_stat *crypt_stat,
rc = -EINVAL;
goto out_free;
}
- ecryptfs_cipher_code_to_string(crypt_stat->cipher,
- (u16)data[(*packet_size)]);
+ rc = ecryptfs_cipher_code_to_string(crypt_stat->cipher,
+ (u16)data[(*packet_size)]);
+ if (rc)
+ goto out_free;
/* A little extra work to differentiate among the AES key
* sizes; see RFC2440 */
switch(data[(*packet_size)++]) {
@@ -1328,7 +1330,9 @@ parse_tag_3_packet(struct ecryptfs_crypt_stat *crypt_stat,
crypt_stat->key_size =
(*new_auth_tok)->session_key.encrypted_key_size;
}
- ecryptfs_init_crypt_ctx(crypt_stat);
+ rc = ecryptfs_init_crypt_ctx(crypt_stat);
+ if (rc)
+ goto out_free;
if (unlikely(data[(*packet_size)++] != 0x03)) {
printk(KERN_WARNING "Only S2K ID 3 is currently supported\n");
rc = -ENOSYS;