From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f71.google.com (mail-io1-f71.google.com [209.85.166.71]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6571686652 for ; Wed, 8 May 2024 15:13:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.71 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715181185; cv=none; b=sHzrw2eGeu8KZ4RjsO1nPouXk4I2Qy6yyebpMYMYBnwj1bXUctBEnYM09I1EQF+q35o0upU8/V2/4hibapjNy42c3MJ/bUM3tbQML94UapK7ILPN4zXHD9B34L814Gppo+ot1HpZJV2g+4q1587+e43tunZdHvawAvFste0vyUs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715181185; c=relaxed/simple; bh=VTooLKM1UWVTk8gSGQDqgDwStVWBUyMdaRzHq8tOcbs=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=L5oqXMtLDCz/mROLTfwZkJGUJ4KC4uULoPRkw7b5sSOo0pGH/nQqLd1OtSsMhFhy6tTTqzLNb61es/pkGXuU5cTU/ascxwoS43arIpif1vTKtBbpL5IrMOhVT8bcGwETcj8bIDcioTH798s5aK8ljAWqiMDu5zFgKA4lV08KIaM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.71 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-io1-f71.google.com with SMTP id ca18e2360f4ac-7dece1fa472so450507939f.0 for ; Wed, 08 May 2024 08:13:04 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1715181183; x=1715785983; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=AEBdO5/t3gWQndQoUbCFMwd1dlzvgeFuNRoAmahB4YQ=; b=sUafB2fAcTc2NDTqDaP30qz5yETxDTpes/uNmwXn6LqxlO0X+NgBy10ZfWRfJAJD8z zzLgBoMdVkSmp2UI0EiVMU2qxDOwfvW5mZqQoxpYFhKlihgpUmdNMXHEHc3PfZb7p1qB r3FZMpEHkvcz2Z4tZ1uPh7l/PFNxDpypq3NVVb+AuabgtOf6vQN5UzIvDdV/WukGAC1h EdYO117BZXgXjYNsJmNy/dvgLeM6UiK1tILUQ2e/28ICG3eA1f0+xNrMRWbD7Hv+rZZS y5dRRfK22ddU+cFctXLHV3Jbjh+3rkiDeHYyEC9iV/WFUSv71GssapNahQVJaDVe3OpX 7riA== X-Forwarded-Encrypted: i=1; AJvYcCUzf5rYmPCbfTg5dxae7hgkI2+5hrVW6UdaLXL/4ZJJip+5OmVFg8vaSpIAFBktXMOqNymQmat2NnMl2hYjX0KY7q5sh8asKkEhgo30eA== X-Gm-Message-State: AOJu0Yw7GmQlCtE5TE9ch+fd+CipOVOEQGVHH1UG/nTT56qUQ6Dhv0fF 38Fq1NoN9V4Vb+A1bOtGtQy1Ckq7x5uk550hAmBPuvR0p4Kuz6GfN0C1beB+3VaozLoEEFp9oFJ /HUo3ds+6e/kNcYGOtIMp+qhM+2zG9FTQWK+Ck7oH7+gcgI2jgw72DA0= X-Google-Smtp-Source: AGHT+IEgJOu5ZVCCFED8YRbF5GZ6UCcgUorZLjp//7D8s5IUYcamXViyuOmXvu9So1WH93R5xeRN4nyaq37WLksFXyCFnIm9g7Cb Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6638:8325:b0:488:ac5a:7fe9 with SMTP id 8926c6da1cb9f-488fdd777e4mr155178173.4.1715181183643; Wed, 08 May 2024 08:13:03 -0700 (PDT) Date: Wed, 08 May 2024 08:13:03 -0700 In-Reply-To: <0000000000006399c80617120daa@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000002d41840617f2bd39@google.com> Subject: Re: [syzbot] [kernfs?] possible deadlock in kernfs_seq_start From: syzbot To: axboe@kernel.dk, gregkh@linuxfoundation.org, hch@lst.de, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu, rafael@kernel.org, syzkaller-bugs@googlegroups.com, tj@kernel.org Content-Type: text/plain; charset="UTF-8" syzbot has bisected this issue to: commit 1e8c813b083c4122dfeaa5c3b11028331026e85d Author: Christoph Hellwig Date: Wed May 31 12:55:32 2023 +0000 PM: hibernate: don't use early_lookup_bdev in resume_store bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1380072f180000 start commit: dccb07f2914c Merge tag 'for-6.9-rc7-tag' of git://git.kern.. git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=1040072f180000 console output: https://syzkaller.appspot.com/x/log.txt?x=1780072f180000 kernel config: https://syzkaller.appspot.com/x/.config?x=9d7ea7de0cb32587 dashboard link: https://syzkaller.appspot.com/bug?extid=4c493dcd5a68168a94b2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1134f3c0980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1367a504980000 Reported-by: syzbot+4c493dcd5a68168a94b2@syzkaller.appspotmail.com Fixes: 1e8c813b083c ("PM: hibernate: don't use early_lookup_bdev in resume_store") For information about bisection process see: https://goo.gl/tpsmEJ#bisection