Re: KASAN: null-ptr-deref Read in reclaim_high

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On Mon, 11 Mar 2019 06:08:01 -0700 syzbot <syzbot+fa11f9da42b46cea3b4a@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

> syzbot has bisected this bug to:
> 
> commit 29a4b8e275d1f10c51c7891362877ef6cffae9e7
> Author: Shakeel Butt <shakeelb@xxxxxxxxxx>
> 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@xxxxxxxxxxxxxxxxxxxxxxxxx
> 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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