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| author | Tyler Hicks <tyhicks@linux.vnet.ibm.com> | 2009-08-11 00:36:32 -0500 |
|---|---|---|
| committer | Tyler Hicks <tyhicks@linux.vnet.ibm.com> | 2009-09-23 09:10:31 -0500 |
| commit | b0105eaefa7cce8f4a941d0fc6354b250d30e745 (patch) | |
| tree | 60bed48ff88aa22d9ee36b64d23421cf9e50d2a8 | |
| parent | 382684984e93039a3bbd83b04d341b0ceb831519 (diff) | |
| download | linux-b0105eaefa7cce8f4a941d0fc6354b250d30e745.tar.gz | |
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>
| -rw-r--r-- | fs/ecryptfs/crypto.c | 1 | ||||
| -rw-r--r-- | fs/ecryptfs/keystore.c | 10 |
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; |