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(Postfix) with ESMTPSA id 86988C4CEC5; Wed, 16 Oct 2024 21:37:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1729114664; bh=GC31XweGRffDUqbHOabMA23kCtlRwpz279XuOqaDFVw=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=1Ch8fcqS1DE1m975qHMKe6ECoXdyCLsUKuzhRmVZZnZ0j4bxALkD1dRmGn1tdfjrP uNUjjUUoZSqoRtZXgnR2TF6aRAOTs+ZxW3NVDDMqnjp1wmhCp/SMgz5xWvb7YXc6wC ZZjzsPHSW6ZgbHV+hIprW5jDYRXZYHIwEL3Nn7lk= Date: Wed, 16 Oct 2024 14:37:43 -0700 From: Andrew Morton To: Aleksandr Nogikh Cc: syzbot , 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: <20241016143743.675996b564d269419c129d29@linux-foundation.org> In-Reply-To: References: <000000000000c6b91e0621a312f4@google.com> <670e81a9.050a0220.d9b66.0153.GAE@google.com> <20241015153958.df4e735274e389999de60d2e@linux-foundation.org> 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Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, 16 Oct 2024 08:19:25 +0200 Aleksandr Nogikh wrote: > Hi Andrew, > > On Wed, Oct 16, 2024 at 12:40 AM Andrew Morton > wrote: > > > > 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. > > > > > > What exactly looks wrong? :) I click on the link (https://syzkaller.appspot.com/x/repro.syz?x=16df4c40580000) and I get the below garbage: > > > > # 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 > > > >