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Sat, 20 May 2023 20:02:25 +0900 (JST) (envelope-from penguin-kernel@I-love.SAKURA.ne.jp) Message-ID: Date: Sat, 20 May 2023 20:02:25 +0900 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Thunderbird/102.11.0 Subject: Re: [syzbot] [kernel?] possible deadlock in scheduler_tick (2) Content-Language: en-US To: syzbot , syzkaller-bugs@googlegroups.com, Mel Gorman , "Huang, Ying" , Vlastimil Babka , Andrew Morton , Alexander Potapenko , Andrey Konovalov , Dmitry Vyukov References: <000000000000cef3a005fc1bcc80@google.com> From: Tetsuo Handa Cc: kasan-dev , linux-mm In-Reply-To: <000000000000cef3a005fc1bcc80@google.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: E40B6160017 X-Rspam-User: X-Rspamd-Server: rspam04 X-Stat-Signature: ir7yig3keen539788aynm7tkz6s9g8tu X-HE-Tag: 1684580574-724053 X-HE-Meta: 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 4tsX+zWX 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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