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b=0+AbjJaNR9Nb0ukXElz0mhePua1yo1/hxyVdNKbOTxRlNl2D4qP3Rrj5o82VDaiHk 8jVg7W4LU+/BnvRfkGhOGOs7rOu0eqKUsK58FNGUUmGYDIkl7ow/wef+gJqF8h7ps9 Zgvp+7Yv5K01RyyQI7XVMgp1vqRSN1kxSnScUw1g= Date: Tue, 15 Oct 2024 15:39:58 -0700 From: Andrew Morton To: syzbot Cc: linmiaohe@huawei.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com, vitaly.wool@konsulko.com Subject: Re: [syzbot] [mm?] BUG: corrupted list in add_to_unbuddied Message-Id: <20241015153958.df4e735274e389999de60d2e@linux-foundation.org> In-Reply-To: <670e81a9.050a0220.d9b66.0153.GAE@google.com> References: <000000000000c6b91e0621a312f4@google.com> <670e81a9.050a0220.d9b66.0153.GAE@google.com> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 77C63140018 X-Stat-Signature: jcnpujycg595osc3esutypndqrbieq3n X-Rspam-User: X-HE-Tag: 1729031995-502222 X-HE-Meta: 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 QfOrQ8dC 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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: List-Subscribe: List-Unsubscribe: On Tue, 15 Oct 2024 07:52:25 -0700 syzbot wrote: > syzbot has found a reproducer for the following issue on: > > HEAD commit: eca631b8fe80 Merge tag 'f2fs-6.12-rc4' of git://git.kernel.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=14d0845f980000 > kernel config: https://syzkaller.appspot.com/x/.config?x=cfbd94c114a3d407 > dashboard link: https://syzkaller.appspot.com/bug?extid=30eac43568e2b3d65728 > compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16df4c40580000 Something seems rather wrong with the "syz repro" page. # https://syzkaller.appspot.com/bug?id=6b5f76b3a3783e6b1876d25b2d7a981ac0e0131f # See https://goo.gl/kgGztJ for information about syzkaller reproducers. #{"threaded":true,"repeat":true,"procs":6,"slowdown":1,"sandbox":"none","sandbox_arg":0,"tun":true,"netdev":true,"resetnet":true,"cgroups":true,"binfmt_misc":true,"close_fds":true,"usb":true,"vhci":true,"wifi":true,"ieee802154":true,"sysctl":true,"swap":true,"tmpdir":true,"segv":true} syz_mount_image$ntfs3(&(0x7f0000000000), &(0x7f0000000140)='./bus\x00', 0x19c6038, &(0x7f0000000180)=ANY=[], 0x1, 0x1f231, &(0x7f000003e780)="$eJzs3QmYTeUfB/D37Pu+XLvBWEO2RLLvsm+pZAvZyRalGhJRSSWpFElCQqhUEklEsi8JSZKQVEIS/2fu3JlmufOvadf7/TyPOfeee877nnu+94z5ne0ebz25edsGbRISEhKIzZAU50gGSSSJXIq9xsfGXYoNmdi/EZ3nV9ttftQreZxZcOVtoxYUXjVUa7/MfEsim+xOx09VOLwp3JT7+MW2vXoPSeg9JGHAwKEJXRO6DRw4tGu3fj0Suvce0rdsQst+PboO6ZHQe8CQHoMzvNyz38BBg0YmdB3Q3VAHDe4xZEhC1wEjE/r2GJkwdGDC0MEjE7re2rX3gISyZcsmGCqB36jd/H96CQAAAAAAAAAAAAAAAAAA4M9x6VLaoX0AAAAAAAAAAAAAAAAAAAC4TDVo3LR+OaKkPWcIQxoRhsxlCCH2L9OlXvfPZdNO8qRdoo9yRX82Sn10um/5fuf