From 8a29f2b0288ba2a8fb302f9a639521ac9ff302e5 Mon Sep 17 00:00:00 2001 From: Michael Halcrow Date: Mon, 5 Nov 2007 14:51:04 -0800 Subject: 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 Reported-by: Kazuki Ohta Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/ecryptfs/crypto.c | 26 ++++++++++++++++++++++---- 1 file changed, 22 insertions(+), 4 deletions(-) diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c index 9ea4769fbb6..bbed2fd40fd 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; } -- cgit v1.2.3-70-g09d2