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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Sat, 08 May 2021 06:49:36 +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 14:41 +0200, Mike Galbraith wrote:
> 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.

What fell out was not the least bit useful.  After days of box working
just fine despite bug being given ample enticement, it didn't take the
bait.  I then build master sans patch set, which exploded on its very
first distro build, after which bug (snickered mightily and) went back
to into hiding.

	-Mike