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Tue, 24 Oct 2023 17:07:32 -0700 (PDT) Date: Tue, 24 Oct 2023 17:07:32 -0700 In-Reply-To: <000000000000985ef90607610b0a@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000e6dbc706087f3df8@google.com> Subject: Re: [syzbot] [mm?] WARNING: suspicious RCU usage in mas_walk (3) From: syzbot To: akpm@linux-foundation.org, hughd@google.com, liam.howlett@oracle.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, postmaster@duagon.onmicrosoft.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: 725A920014 X-Rspam-User: X-Rspamd-Server: rspam02 X-Stat-Signature: ramjm83wzfanm5z9y49n176zbqcqq554 X-HE-Tag: 1698192453-838791 X-HE-Meta: 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 RERKO4gK 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 x7IyRNmb DOEnJ2BLgTAsFYXxRXxwTn4B+oz7mgvnCcaHPPKXBrWH5u8tfgiuhR/2FtqdRFOi0c0MY5rppJ8ULWMEyVyCcZ+pRWXuBRe2HJTC19AanCMZ/AmyluY27Q== 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: List-Subscribe: List-Unsubscribe: syzbot has bisected this issue to: commit edd33b8807a1fa6268a71758bf38de0b4adf2e70 Author: Hugh Dickins Date: Tue Oct 3 09:29:00 2023 +0000 mempolicy: migration attempt to match interleave nodes bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=13d353cb680000 start commit: e8361b005d7c Add linux-next specific files for 20231023 git tree: linux-next final oops: https://syzkaller.appspot.com/x/report.txt?x=103353cb680000 console output: https://syzkaller.appspot.com/x/log.txt?x=17d353cb680000 kernel config: https://syzkaller.appspot.com/x/.config?x=39bda8753f457952 dashboard link: https://syzkaller.appspot.com/bug?extid=79fcba037b6df73756d3 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13714705680000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1236430b680000 Reported-by: syzbot+79fcba037b6df73756d3@syzkaller.appspotmail.com Fixes: edd33b8807a1 ("mempolicy: migration attempt to match interleave nodes") For information about bisection process see: https://goo.gl/tpsmEJ#bisection