From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=209.85.167.197 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793060225; b=YJ32/1nV9KVpK4ryJA/guTgz91fUjFopuDIj0xWkgzTzS/Ban33Y+17fXjXen2FbY94I yPTES0OcugWkX6DaphjHvwAcAPh7hqOknrBR9V5E6XWahPspwlGgSPHv+WJtN6aHBG1CR iZA+zsvx1Npk3tLf7lB4TnOUa7cIh/AjJ8r7J0tZ6XwB5a91Qhyv4FcvgHiZVl148ayex sTrKR95iYJq/UR6uI0BLLRqfWSHbLQApmddqtGZ4CuUE7V+YxaM/41INIGqGLsJBiKNsb au7B4oy9t708heShLpqJOVCSWOhmEROcOD0mqZhLmQL9Ke5uDSobmbW0YvERGqr9MfA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793060225; h=DMARC-Filter:Received:X-Google-DKIM-Signature:X-Forwarded-Encrypted: X-Gm-Message-State:MIME-Version:X-Received:Date:In-Reply-To: X-Google-Appengine-App-Id:X-Google-Appengine-App-Id-Alias:Message-ID: Subject:From:To:Content-Type; bh=6x9+N/COr+6pNBpUPwwvKfGBRH2EOtY9PmyW7dZS2UA=; b=ZhwXu6ThyVwCuJOcwHSPkHqsyAc/w/jBk1vmRAJ3aAUhhQ6Yavd6l544x1P7CSjHKSL9 lfHuCMHkSfvFQ/RvaiJ++6fHYQ+W/Ee0Q1u/4XbrkR52IHmB9TKRW39PcPBD4b0xfCapY ZBOaykpBfiEwwp4oOa9ZYoPEQItdQvwcpG57R3IXwhVFPtj7kG5JlUCO0sP3MhPwbR5CX qko5fKch9XfAI2/S95cxypmhjCmtkBaCEBn5fFh7vM9azqdReUFtSoDsP93dBQ7PKWJ2E V7ELWRvn5xhhn4gYI88CCDzuQVUb9Na+ANgHLunLRzW3ZAvkkvDY+ME2SUIP2mbUBCA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=fail header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.remote-ip=209.85.167.197 Received: from mail-oi1-f197.google.com (mail-oi1-f197.google.com [209.85.167.197]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1C5F1606A32C for ; Tue, 27 Oct 2026 00:17:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 1C5F1606A32C 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-oi1-f197.google.com with SMTP id 5614622812f47-4b37620eb73so6278608b6e.1 for ; Mon, 26 Oct 2026 17:17:04 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1793060224; x=1793665024; h=content-type:to:from:subject:message-id:in-reply-to:date :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to:content-type; bh=6x9+N/COr+6pNBpUPwwvKfGBRH2EOtY9PmyW7dZS2UA=; b=lrd0qDVT6jd8afahUVCEQCq44vIjyjKJenCIlGNvM4HjBYA8p9eLALZ8/q7CRavtZH nVI9ofU7iMwp4CsKvvNAYtaSYc5YsQtbJ3mnB0MPq+GWtBSsoLy5chY21p8Ip5bzH0kX 5+1y5IHbo4u3SqT+kL4G5o9kaFkH4JlnsGXwY4+QsOXQTIQimwqFhc9QN7wETKlHqUTY J/UZCXCLJIND1qfvCpdUGqOFO/mot6tqDcWQRbuY2RF87LXdOplJX9kotHBJp1x3ikY4 KjkjVP/Lbmkc/3zsPedXfLPpmAeOhI6kVcAQcXNzZxoGEvaMl5xsDO8TUIG8AaNqIQmH o7HQ== X-Forwarded-Encrypted: i=1; AKwUvBzLIxMkrdnhQDX/UOyxb5hq8GibFu/il3zsEdoBnFzPoqTtUqygIvhs3tJOtOPo06iVYWh02TWj4YIKvTI=@vger.kernel.org X-Gm-Message-State: AFq9FYIFAInZzjiEnaAPEn2MrIvTPZopCsoKq2QAxyCGx2onUgmj4JN6 58hkkl/q9yFlK8buYWbxRcrskQLbSgVux1PKuigCMuVwlyiqGMhfmahtRecgcKYbqP6eF7Tdrsw 9RFakMbAST+/nmCgNxL6RGRwmS8908Udho2UPQAspn+rMvTCcT+7a4yEf0aE= X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 X-Received: by 2002:a05:6808:10ce:b0:4e6:db9c:9a7c with SMTP id 5614622812f47-55c002ec88bmr4875116b6e.63.1793060224091; Mon, 26 Oct 2026 17:17:04 -0700 (PDT) Date: Mon, 26 Oct 2026 17:17:04 -0700 In-Reply-To: <6ad78978.b5bd089a.6b57.008d.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6adfed80.6200f071.51519.0efd.GAE@google.com> Subject: Re: [syzbot] [block?] possible deadlock in blkdev_buffered_write From: syzbot To: axboe@kernel.dk, bvanassche@acm.org, hch@lst.de, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, mzx199711@gmail.com, sunjunchao@bytedance.com, syzkaller-bugs@googlegroups.com, tz2294@columbia.edu Content-Type: text/plain; charset="UTF-8" syzbot has bisected this issue to: commit 1b1be9ea4e34ccede1e7cf9ff2b6317328a5b6ad Author: Julian Sun Date: Thu Oct 15 09:11:05 2026 +0000 block: take the inode lock for buffered write fallback bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=165121e1580000 start commit: 21a7f44fd076 Merge tag 'devicetree-for-7.4' of git://git.k.. git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=155121e1580000 console output: https://syzkaller.appspot.com/x/log.txt?x=115121e1580000 kernel config: https://syzkaller.appspot.com/x/.config?x=cb217ea80b9f9fe dashboard link: https://syzkaller.appspot.com/bug?extid=bd975ef54294bec73f0e syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1634b469580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=108dd695580000 Reported-by: syzbot+bd975ef54294bec73f0e@syzkaller.appspotmail.com Fixes: 1b1be9ea4e34 ("block: take the inode lock for buffered write fallback") For information about bisection process see: https://goo.gl/tpsmEJ#bisection