linux-kernel - [PATCH 4.3 155/200] ext4: fix an endianness bug in ext4_encrypted_follow

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Message-Id: <20160214222223.002015058@linuxfoundation.org>
Date:	Sun, 14 Feb 2016 14:22:42 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Al Viro <viro@...iv.linux.org.uk>,
	Theodore Tso <tytso@....edu>
Subject: [PATCH 4.3 155/200] ext4: fix an endianness bug in ext4_encrypted_follow_link()

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

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

From: Al Viro <viro@...IV.linux.org.uk>

commit 5a1c7f47da9b32d0671e776b0f388095b7f91e2e upstream.

applying le32_to_cpu() to 16bit value is a bad idea...

Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
Signed-off-by: Theodore Ts'o <tytso@....edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

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

--- a/fs/ext4/symlink.c
+++ b/fs/ext4/symlink.c
@@ -52,7 +52,7 @@ static const char *ext4_encrypted_follow
 	/* Symlink is encrypted */
 	sd = (struct ext4_encrypted_symlink_data *)caddr;
 	cstr.name = sd->encrypted_path;
-	cstr.len  = le32_to_cpu(sd->len);
+	cstr.len  = le16_to_cpu(sd->len);
 	if ((cstr.len +
 	     sizeof(struct ext4_encrypted_symlink_data) - 1) >
 	    max_size) {