linux-kernel - Re: [PATCH] bonding: Fix use after free in unregister path

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Message-ID: <4679B476.9060503@garzik.org>
Date:	Wed, 20 Jun 2007 19:12:54 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	Jay Vosburgh <fubar@...ibm.com>
CC:	Stephen Hemminger <shemminger@...ux-foundation.org>,
	"David S. Miller" <davem@...emloft.net>,
	Dan Aloni <da-x@...atomic.org>,
	Chad Tindel <ctindel@...rs.sourceforge.net>,
	Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>,
	netdev@...r.kernel.org,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	bonding-devel@...ts.sourceforge.net
Subject: Re: [PATCH] bonding: Fix use after free in unregister path

Jay Vosburgh wrote:
> 	The following patch (based on a patch from Stephen Hemminger
> <shemminger@...ux-foundation.org>) removes use after free conditions in
> the unregister path for the bonding master.  Without this patch, an
> operation of the form "echo -bond0 > /sys/class/net/bonding_masters"
> would trigger a NULL pointer dereference in sysfs.  I was not able to
> induce the failure with the non-sysfs code path, but for consistency I
> updated that code as well.
> 
> 	I also did some testing of the bonding /proc file being open
> while the bond is being deleted, and didn't see any problems there.
> 
> Signed-off-by: Jay Vosburgh <fubar@...ibm.com>

applied to #upstream-fixes


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