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| author | Michael Halcrow <mhalcrow@us.ibm.com> | 2007-11-05 14:51:04 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-11-05 15:12:33 -0800 |
| commit | 8a29f2b0288ba2a8fb302f9a639521ac9ff302e5 (patch) | |
| tree | 384f27ea6300fe50345b0ab5cd7fdad23d0bdb79 | |
| parent | 778d1a2bd42ae862a6c6d20a1c3af5e45b3c1924 (diff) | |
| download | lwn-8a29f2b0288ba2a8fb302f9a639521ac9ff302e5.tar.gz lwn-8a29f2b0288ba2a8fb302f9a639521ac9ff302e5.zip | |
eCryptfs: release mutex on hash error path
Release the crypt_stat hash mutex on allocation error. Check for error
conditions when doing crypto hash calls.
Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com>
Reported-by: Kazuki Ohta <kazuki.ohta@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | fs/ecryptfs/crypto.c | 26 |
1 files changed, 22 insertions, 4 deletions
diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c index 9ea4769fbb66..bbed2fd40fdc 100644 --- a/fs/ecryptfs/crypto.c +++ b/fs/ecryptfs/crypto.c @@ -115,11 +115,29 @@ static int ecryptfs_calculate_md5(char *dst, } crypt_stat->hash_tfm = desc.tfm; } - crypto_hash_init(&desc); - crypto_hash_update(&desc, &sg, len); - crypto_hash_final(&desc, dst); - mutex_unlock(&crypt_stat->cs_hash_tfm_mutex); + rc = crypto_hash_init(&desc); + if (rc) { + printk(KERN_ERR + "%s: Error initializing crypto hash; rc = [%d]\n", + __FUNCTION__, rc); + goto out; + } + rc = crypto_hash_update(&desc, &sg, len); + if (rc) { + printk(KERN_ERR + "%s: Error updating crypto hash; rc = [%d]\n", + __FUNCTION__, rc); + goto out; + } + rc = crypto_hash_final(&desc, dst); + if (rc) { + printk(KERN_ERR + "%s: Error finalizing crypto hash; rc = [%d]\n", + __FUNCTION__, rc); + goto out; + } out: + mutex_unlock(&crypt_stat->cs_hash_tfm_mutex); return rc; } |