From: David Sterba <dsterba@suse.cz>
Date: Wed, 25 Mar 2015 18:26:41 +0000 (+0100)
Subject: btrfs: don't accept bare namespace as a valid xattr
X-Git-Tag: v3.2.70~146
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=07489bed80696168a3e43212f63832e55e18b4ae;p=pandora-kernel.git

btrfs: don't accept bare namespace as a valid xattr

commit 3c3b04d10ff1811a27f86684ccd2f5ba6983211d upstream.

Due to insufficient check in btrfs_is_valid_xattr, this unexpectedly
works:

 $ touch file
 $ setfattr -n user. -v 1 file
 $ getfattr -d file
user.="1"

ie. the missing attribute name after the namespace.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=94291
Reported-by: William Douglas <william.douglas@intel.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
[bwh: Backported to 3.2: XATTR_BTRFS_PREFIX is not supported]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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