From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f72.google.com (mail-io1-f72.google.com [209.85.166.72]) (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 3E1F11397 for ; Tue, 16 Sep 2025 18:18:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.72 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758046685; cv=none; b=KrtsrVKk5FetukPyKxWIahuoVpFRaYvrFd8+rf6XFzks92Vj5ObsY05JVPe4bo7i0EN+zrjPRvaIx/Tw1tvlKOWNNwwTFe+drVhCrkz5O4onNlUt5NX8M8USC/VXn03+j7HzKLXwJlPHeBxHtjHJwIaLiOhHuhkEj7JxQ0EPvZc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758046685; c=relaxed/simple; bh=1RAPhH4ssAlkZF8L2GU4Z2iMnCjOWlqH4PSc3IELGmA=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=aURlwQIFI6OmhEeXWTM15/VnMsITjtjXZlIVBc/9Tl6xiVX7ZOsiDE05IfI6bGMbNwAAQ55lrK8zs2MaYEVNVMxzN6XR5i15cw93FhW96It673jbO0U61lk3KM1VIVOzgdi46M/SS6PwMSfOoKsZldOrRlxma7OAdridJCwTvJo= 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=209.85.166.72 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-f72.google.com with SMTP id ca18e2360f4ac-88c2ff21d59so1444401939f.1 for ; Tue, 16 Sep 2025 11:18:04 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1758046683; x=1758651483; h=content-transfer-encoding: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=2rU37PJG/RwAlClhGWIfSNoA2jBYu7p5oZH2qtNCwBE=; b=lpQ0BmcvL7BChz0vwGYXT/hiL3pv2EQWVZJ72Wi0UasU2TlxHa+lJJaIoQTnD1t2eu HjEKY9/Gs59b6cRkSyoaO9cYtsL+NtVz8jGElt5c5PXLoVKJMeq8pGuUxxYaqpGGOJN+ AFlAD43yqZuMl0a2WrwGzRe5zAdjfpboRMCkq80szRa4ikcyxKQD/t5PBa7+lDJUFn1g /J79PwIKM/1QW/PqSP6mrjm28FoVBrrgq6JLJjcPw28q1rUjq/3pDJLbEjRmH4+q/g3F CWpm1mSSL4H27fm7KHC8lAuHc6ocY+9r9zHjDG6cQGI5RXSvcQcH1GhBdyXYbSfYFS+q Z+hA== X-Forwarded-Encrypted: i=1; AJvYcCWN0ZrTdmsOX4nRdy6kHm+S6qUiwt6eL1Zr4a29yR8DRbfGxRj/vBFIDHfoHF64X3fjbZ7y8A25s6CIiU4=@vger.kernel.org X-Gm-Message-State: AOJu0Yy9ZIF3OJx8I4qfLc9FS/DNGnXLc5yYDo4G/JPzit7+gZUN8vYm qmMyRBmPdTNxmxlRayt8mNz6YunuJbSxXNOt1xGh4dZCdA0udAKH4bsNyYd8RXUsTJ2lrWcJwZr bRCkrz4TrfpRqx1kPD6IV8oNfaJ6hiLHf+edZqQTBslZoc2lTTRiU82KK/Uc= X-Google-Smtp-Source: AGHT+IEE0JCQta35npizPSVTe6sFCWoRUEX9n1n3GCeKWgrL2bjN/I2LJfLEexYuxkFPCyOkGkU33NMtalVInu1mss5FMlOrx++e Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1568:b0:406:7c54:9f6c with SMTP id e9e14a558f8ab-4209d31bb8emr150067625ab.7.1758046683445; Tue, 16 Sep 2025 11:18:03 -0700 (PDT) Date: Tue, 16 Sep 2025 11:18:03 -0700 In-Reply-To: <686aa557.a00a0220.c7b3.005d.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68c9a9db.050a0220.2ff435.040b.GAE@google.com> Subject: Re: [syzbot] [nbd?] possible deadlock in nbd_queue_rq From: syzbot To: axboe@kernel.dk, bvanassche@acm.org, hdanton@sina.com, josef@toxicpanda.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, ming.lei@redhat.com, nbd@other.debian.org, penguin-kernel@i-love.sakura.ne.jp, syzkaller-bugs@googlegroups.com, thomas.hellstrom@linux.intel.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable syzbot has bisected this issue to: commit ffa1e7ada456087c2402b37cd6b2863ced29aff0 Author: Thomas Hellstr=C3=B6m Date: Tue Mar 18 09:55:48 2025 +0000 block: Make request_queue lockdep splats show up earlier bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=3D11eef7625800= 00 start commit: f83ec76bf285 Linux 6.17-rc6 git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=3D13eef7625800= 00 console output: https://syzkaller.appspot.com/x/log.txt?x=3D15eef762580000 kernel config: https://syzkaller.appspot.com/x/.config?x=3D8f01d8629880e62= 0 dashboard link: https://syzkaller.appspot.com/bug?extid=3D3dbc6142c85cc77ea= f04 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=3D1009bb6258000= 0 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=3D14833b12580000 Reported-by: syzbot+3dbc6142c85cc77eaf04@syzkaller.appspotmail.com Fixes: ffa1e7ada456 ("block: Make request_queue lockdep splats show up earl= ier") For information about bisection process see: https://goo.gl/tpsmEJ#bisectio= n