linux-kernel - Re: [PATCH 1/1] fs-sysfs bugfix of sysfs_hash_and_remove dereferencing before checking for NULL

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Date:	Mon, 25 Jun 2007 14:25:43 -0700
From:	Greg KH <greg@...ah.com>
To:	dougthompson@...ssion.com
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] fs-sysfs bugfix of sysfs_hash_and_remove
	dereferencing before checking for NULL

On Fri, Jun 22, 2007 at 10:13:24AM -0700, Doug Thompson wrote:
> From:	Douglas Thompson <dougthompson@...ssion.com>
> 
> In tracking down one of my bugs in using sysfs, I found the kernel doing a NULL de-reference
> in function fs/sysfs/inode.c:sysfs_hash_and_remove(), when I (incorrectly) passed
> in a dentry value of NULL.
> 
> The check for NULL should occur BEFORE the dereference of 'dir'. 
> This patch modifies the sequence and does the check FIRST
> 
> 
> Signed-off-by:	Douglas Thompson <dougthompson@...ssion.com>
> ---
> 
> Index: linux-2.6.22-rc4-mm2/fs/sysfs/inode.c

There's been a lot of churn and change in this area and this patch
doens't apply anymore.  Can you try respinning it against the next -mm
release and resending it if it is still needed?

thanks,

greg k-h

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