linux-kernel - Re: [4.10, panic, regression] iscsi: null pointer deref at iscsi_tcp_segment

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Date:   Thu, 22 Dec 2016 07:36:56 +0100
From:   Christoph Hellwig <hch@....de>
To:     Dave Chinner <david@...morbit.com>
Cc:     Christoph Hellwig <hch@....de>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Chris Leech <cleech@...hat.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Lee Duncan <lduncan@...e.com>, open-iscsi@...glegroups.com,
        Linux SCSI List <linux-scsi@...r.kernel.org>,
        linux-block@...r.kernel.org
Subject: Re: [4.10, panic, regression] iscsi: null pointer deref at
        iscsi_tcp_segment_done+0x20d/0x2e0

On Thu, Dec 22, 2016 at 05:30:46PM +1100, Dave Chinner wrote:
> > For "normal" bios the for_each_segment loop iterates over bi_vcnt,
> > so it will be ignored anyway.  That being said both I and the lists
> > got CCed halfway through the thread and I haven't seen the original
> > report, so I'm not really sure what's going on here anyway.
> 
> http://www.gossamer-threads.com/lists/linux/kernel/2587485

This doesn't look like the discard changes, but if Chris wants to test
without them f9d03f96b988 reverts cleanly.