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Message-Id: <20190311163747.f56cceebd9c2661e4519bdfc@linux-foundation.org>
Date: Mon, 11 Mar 2019 16:37:47 -0700
From: Andrew Morton <akpm@...ux-foundation.org>
To: syzbot <syzbot+fa11f9da42b46cea3b4a@...kaller.appspotmail.com>
Cc: cgroups@...r.kernel.org, hannes@...xchg.org,
linux-kernel@...r.kernel.org, linux-mm@...ck.org,
mhocko@...nel.org, mhocko@...e.com, sfr@...b.auug.org.au,
shakeelb@...gle.com, syzkaller-bugs@...glegroups.com,
vdavydov.dev@...il.com
Subject: Re: KASAN: null-ptr-deref Read in reclaim_high
On Mon, 11 Mar 2019 06:08:01 -0700 syzbot <syzbot+fa11f9da42b46cea3b4a@...kaller.appspotmail.com> wrote:
> syzbot has bisected this bug to:
>
> commit 29a4b8e275d1f10c51c7891362877ef6cffae9e7
> Author: Shakeel Butt <shakeelb@...gle.com>
> Date: Wed Jan 9 22:02:21 2019 +0000
>
> memcg: schedule high reclaim for remote memcgs on high_work
>
> bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=155bf5db200000
> start commit: 29a4b8e2 memcg: schedule high reclaim for remote memcgs on..
> git tree: linux-next
> final crash: https://syzkaller.appspot.com/x/report.txt?x=175bf5db200000
> console output: https://syzkaller.appspot.com/x/log.txt?x=135bf5db200000
> kernel config: https://syzkaller.appspot.com/x/.config?x=611f89e5b6868db
> dashboard link: https://syzkaller.appspot.com/bug?extid=fa11f9da42b46cea3b4a
> userspace arch: amd64
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14259017400000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=141630a0c00000
>
> Reported-by: syzbot+fa11f9da42b46cea3b4a@...kaller.appspotmail.com
> Fixes: 29a4b8e2 ("memcg: schedule high reclaim for remote memcgs on
> high_work")
The following patch
memcg-schedule-high-reclaim-for-remote-memcgs-on-high_work-v3.patch
might have fixed this. Was it applied?
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