From: Dan Carpenter Date: Tue, 19 Jan 2010 09:34:32 +0000 (+0300) Subject: ecryptfs: use after free X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ece550f51ba175c14ec3ec047815927d7386ea1f;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git ecryptfs: use after free The "full_alg_name" variable is used on a couple error paths, so we shouldn't free it until the end. Signed-off-by: Dan Carpenter Cc: stable@kernel.org Signed-off-by: Tyler Hicks --- diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c index fbb6e5eed697..7cb0a59f4b9d 100644 --- a/fs/ecryptfs/crypto.c +++ b/fs/ecryptfs/crypto.c @@ -1748,7 +1748,7 @@ ecryptfs_process_key_cipher(struct crypto_blkcipher **key_tfm, char *cipher_name, size_t *key_size) { char dummy_key[ECRYPTFS_MAX_KEY_BYTES]; - char *full_alg_name; + char *full_alg_name = NULL; int rc; *key_tfm = NULL; @@ -1763,7 +1763,6 @@ ecryptfs_process_key_cipher(struct crypto_blkcipher **key_tfm, if (rc) goto out; *key_tfm = crypto_alloc_blkcipher(full_alg_name, 0, CRYPTO_ALG_ASYNC); - kfree(full_alg_name); if (IS_ERR(*key_tfm)) { rc = PTR_ERR(*key_tfm); printk(KERN_ERR "Unable to allocate crypto cipher with name " @@ -1786,6 +1785,7 @@ ecryptfs_process_key_cipher(struct crypto_blkcipher **key_tfm, goto out; } out: + kfree(full_alg_name); return rc; }