linux-kernel - [PATCH 4.8 46/57] ext4: fix memory leak when symlink decryption fails

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Message-Id: <20161021091437.551634217@linuxfoundation.org>
Date:   Fri, 21 Oct 2016 11:18:09 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Eric Biggers <ebiggers@...gle.com>,
        Theodore Tso <tytso@....edu>
Subject: [PATCH 4.8 46/57] ext4: fix memory leak when symlink decryption fails

4.8-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Eric Biggers <ebiggers@...gle.com>

commit dcce7a46c6f28f41447272fb44348ead8f584573 upstream.

This bug was introduced in v4.8-rc1.

Signed-off-by: Eric Biggers <ebiggers@...gle.com>
Signed-off-by: Theodore Ts'o <tytso@....edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/ext4/symlink.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/fs/ext4/symlink.c
+++ b/fs/ext4/symlink.c
@@ -65,13 +65,12 @@ static const char *ext4_encrypted_get_li
 	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';