From: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
To: Dmitry Vyukov <dvyukov@google.com>,
Michal Hocko <mhocko@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
David Rientjes <rientjes@google.com>
Cc: syzbot <syzbot+f0fc7f62e88b1de99af3@syzkaller.appspotmail.com>,
'Dmitry Vyukov' via syzkaller-upstream-moderation
<syzkaller-upstream-moderation@googlegroups.com>,
linux-mm <linux-mm@kvack.org>
Subject: [PATCH] mm, oom: Introduce time limit for dump_tasks duration.
Date: Thu, 6 Sep 2018 19:58:25 +0900 [thread overview]
Message-ID: <58aa0543-86d0-b2ad-7fb9-9bed7c6a1f6c@i-love.sakura.ne.jp> (raw)
In-Reply-To: <CACT4Y+YKJWJr-5rBQidt6nY7+VF=BAsvHyh+XTaf8spwNy3qPA@mail.gmail.com>
On 2018/09/06 18:54, Dmitry Vyukov wrote:
> On Thu, Sep 6, 2018 at 7:53 AM, Tetsuo Handa
> <penguin-kernel@i-love.sakura.ne.jp> wrote:
>> Dmitry Vyukov wrote:
>>>> Also, another notable thing is that the backtrace for some reason includes
>>>>
>>>> [ 1048.211540] ? oom_killer_disable+0x3a0/0x3a0
>>>>
>>>> line. Was syzbot testing process freezing functionality?
>>>
>>> What's the API for this?
>>>
>>
>> I'm not a user of suspend/hibernation. But it seems that usage of the API
>> is to write one of words listed in /sys/power/state into /sys/power/state .
>>
>> # echo suspend > /sys/power/state
>
> syzkaller should not write to /sys/power/state. The only mention of
> "power" is in some selinux contexts.
>
OK. Then, I have no idea.
Anyway, I think we can apply this patch.
next prev parent reply other threads:[~2018-09-06 11:55 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <0000000000004a6b700575178b5a@google.com>
[not found] ` <CACT4Y+aPRGUqAdJCMDWM=Zcy8ZQcHyrsB1ZuWS4VB_+wvLfeaQ@mail.gmail.com>
2018-09-05 10:53 ` INFO: task hung in ext4_da_get_block_prep Tetsuo Handa
2018-09-05 11:06 ` Dmitry Vyukov
2018-09-06 5:53 ` Tetsuo Handa
2018-09-06 9:54 ` Dmitry Vyukov
2018-09-06 10:58 ` Tetsuo Handa [this message]
2018-09-06 11:07 ` [PATCH] mm, oom: Introduce time limit for dump_tasks duration Dmitry Vyukov
2018-09-06 11:25 ` Tetsuo Handa
2018-09-06 11:23 ` Michal Hocko
2018-09-06 11:40 ` Tetsuo Handa
2018-09-06 11:53 ` Michal Hocko
2018-09-06 12:08 ` Dmitry Vyukov
2018-09-06 12:16 ` Michal Hocko
2018-09-11 16:37 ` Oleg Nesterov
2018-09-12 16:45 ` Oleg Nesterov
2018-09-06 13:45 ` Tetsuo Handa
2018-09-06 14:39 ` Michal Hocko
2018-09-06 20:58 ` Tetsuo Handa
2018-09-07 8:27 ` Michal Hocko
2018-09-07 9:36 ` Dmitry Vyukov
2018-09-07 10:49 ` Tetsuo Handa
2018-09-07 11:08 ` Michal Hocko
2018-09-08 14:00 ` Dmitry Vyukov
2018-09-10 14:36 ` Dmitry Vyukov
2018-09-07 10:20 ` Tetsuo Handa
2019-03-03 11:33 ` INFO: task hung in ext4_da_get_block_prep syzbot
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