linux-kernel - Re: block, bfq: NULL pointer dereference in bfq_rq_pos_tree

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Message-ID: <e0ece2e6349e92adc3da6d8c2ae6ff8a4172e4ad.camel@gmx.de>
Date:   Mon, 03 May 2021 14:41:54 +0200
From:   Mike Galbraith <efault@....de>
To:     Paolo Valente <paolo.valente@...aro.org>
Cc:     lkml <linux-kernel@...r.kernel.org>,
        linux-block <linux-block@...r.kernel.org>
Subject: Re: block, bfq: NULL pointer dereference in bfq_rq_pos_tree_lookup()

On Mon, 2021-05-03 at 11:52 +0200, Paolo Valente wrote:
> Hi Mike,
> I've waited a little bit before replying, because I've worked on a dev
> patch series, for debugging another crash. I'd like to use
> this series for your failure too, as the OOPS you report
> unfortunately does not ring any bell :(
>
> So, could you please try to apply this patch series?  If it doesn't
> apply, I'll rebase it.

This bug isn't deterministic, but I can wedge your set into my devel
trees, and see if anything falls out.

	-Mike