From: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
To: syzbot <syzbot+ece2915262061d6e0ac1@syzkaller.appspotmail.com>,
syzkaller-bugs@googlegroups.com,
Mel Gorman <mgorman@techsingularity.net>,
"Huang, Ying" <ying.huang@intel.com>,
Vlastimil Babka <vbabka@suse.cz>,
Andrew Morton <akpm@linux-foundation.org>,
Alexander Potapenko <glider@google.com>,
Andrey Konovalov <andreyknvl@gmail.com>,
Dmitry Vyukov <dvyukov@google.com>
Cc: kasan-dev <kasan-dev@googlegroups.com>, linux-mm <linux-mm@kvack.org>
Subject: Re: [syzbot] [kernel?] possible deadlock in scheduler_tick (2)
Date: Sat, 20 May 2023 20:02:25 +0900 [thread overview]
Message-ID: <ecba318b-7452-92d0-4a2f-2f6c9255f771@I-love.SAKURA.ne.jp> (raw)
In-Reply-To: <000000000000cef3a005fc1bcc80@google.com>
This looks same pattern with https://lkml.kernel.org/r/6577e1fa-b6ee-f2be-2414-a2b51b1c5e30@I-love.SAKURA.ne.jp .
I think stackdepot needs to drop __GFP_KSWAPD_RECLAIM as well as debugobject did.
Like I wrote at https://lore.kernel.org/linux-mm/d642e597-cf7d-b410-16ce-22dff483fd8e@I-love.SAKURA.ne.jp/ ,
I wish that GFP_ATOMIC / GFP_NOWAIT do not imply __GFP_KSWAPD_RECLAIM...
On 2023/05/20 17:26, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: f1fcbaa18b28 Linux 6.4-rc2
> git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
> console output: https://syzkaller.appspot.com/x/log.txt?x=1332a029280000
> kernel config: https://syzkaller.appspot.com/x/.config?x=3dc1cdd68141cdc3
> dashboard link: https://syzkaller.appspot.com/bug?extid=ece2915262061d6e0ac1
> compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
> userspace arch: arm64
>
> Unfortunately, I don't have any reproducer for this issue yet.
>
> Downloadable assets:
> disk image: https://storage.googleapis.com/syzbot-assets/f9e1748cceea/disk-f1fcbaa1.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/6dea99343621/vmlinux-f1fcbaa1.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/f5a93f86012d/Image-f1fcbaa1.gz.xz
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+ece2915262061d6e0ac1@syzkaller.appspotmail.com
next parent reply other threads:[~2023-05-20 11:02 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <000000000000cef3a005fc1bcc80@google.com>
2023-05-20 11:02 ` Tetsuo Handa [this message]
2023-05-20 11:33 ` [PATCH] lib/stackdepot: stackdepot: don't use __GFP_KSWAPD_RECLAIM from __stack_depot_save() if atomic context Tetsuo Handa
2023-05-20 13:14 ` Tetsuo Handa
2023-05-20 22:44 ` Tetsuo Handa
2023-05-22 2:13 ` Huang, Ying
2023-05-22 2:47 ` Tetsuo Handa
2023-05-22 3:07 ` Huang, Ying
2023-05-22 11:33 ` Tetsuo Handa
2023-05-23 0:07 ` Huang, Ying
2023-05-23 0:45 ` Tetsuo Handa
2023-05-23 1:10 ` Huang, Ying
2023-05-24 12:09 ` Michal Hocko
2023-05-27 15:25 ` [PATCH] kasan,kmsan: remove __GFP_KSWAPD_RECLAIM usage from kasan/kmsan Tetsuo Handa
2023-05-29 1:07 ` Huang, Ying
2023-05-31 13:31 ` Alexander Potapenko
2023-06-09 22:31 ` Andrew Morton
[not found] ` <19d6c965-a9cf-16a5-6537-a02823d67c0a@I-love.SAKURA.ne.jp>
2023-06-12 1:30 ` [PATCH v3] lib/stackdepot: fix gfp flags manipulation in __stack_depot_save() Huang, Ying
2023-06-21 12:56 ` Alexander Potapenko
2023-06-21 14:07 ` Tetsuo Handa
2023-06-21 14:42 ` Alexander Potapenko
2023-06-21 14:54 ` Tetsuo Handa
2023-06-21 15:37 ` [PATCH] kasan,kmsan: remove __GFP_KSWAPD_RECLAIM usage from kasan/kmsan Alexander Potapenko
2023-05-27 21:01 ` [syzbot] [ntfs3?] possible deadlock in scheduler_tick (2) syzbot
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