From: Eric Biggers <ebiggers@google.com>
Date: Thu, 15 Sep 2016 17:13:13 +0000 (-0400)
Subject: ext4: fix memory leak when symlink decryption fails
X-Git-Tag: v4.14-rc1~2333^2~19
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=dcce7a46c6f28f41447272fb44348ead8f584573;p=platform%2Fkernel%2Flinux-rpi.git

ext4: fix memory leak when symlink decryption fails

This bug was introduced in v4.8-rc1.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@vger.kernel.org
---

diff --git a/fs/ext4/symlink.c b/fs/ext4/symlink.c
index 4d83d9e..04a7850 100644
--- a/fs/ext4/symlink.c
+++ b/fs/ext4/symlink.c
@@ -65,13 +65,12 @@ static const char *ext4_encrypted_get_link(struct dentry *dentry,
 	res = fscrypt_fname_alloc_buffer(inode, cstr.len, &pstr);
 	if (res)
 		goto errout;
+	paddr = pstr.name;
 
 	res = fscrypt_fname_disk_to_usr(inode, 0, 0, &cstr, &pstr);
 	if (res < 0)
 		goto errout;
 
-	paddr = pstr.name;
-
 	/* Null-terminate the name */
 	if (res <= pstr.len)
 		paddr[res] = '\0';