linux-kernel - Re: can't boot with reiserfs on linux-4.6.0+

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Message-ID: <20160524183703.GZ14480@ZenIV.linux.org.uk>
Date:	Tue, 24 May 2016 19:37:03 +0100
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Jeff Chua <jeff.chua.linux@...il.com>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: can't boot with reiserfs on linux-4.6.0+

On Tue, May 24, 2016 at 04:59:02PM +0100, Al Viro wrote:

> Umm...  Any chance of getting the function names to go with the addresses?
> I'll try to reproduce it here, but the things would be easier with that
> information...

See if this fixes your reproducer.

diff --git a/fs/xattr.c b/fs/xattr.c
index b11945e..49b8eab 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -667,6 +667,9 @@ xattr_resolve_name(const struct xattr_handler **handlers, const char **name)
 {
 	const struct xattr_handler *handler;
 
+	if (!handlers)
+		return NULL;
+
 	if (!*name)
 		return NULL;