From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f77.google.com (mail-io1-f77.google.com [209.85.166.77]) (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 F065D1F3B9E for ; Tue, 15 Apr 2025 14:14:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.77 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744726472; cv=none; b=lxPuA6s9yWET6p82c0/z7HslkL3qk2QRyqlFKR2cbIXrb1cOJGMsQapKMHiOYREQr0Pbq9G9JfW4npV6ZUj6vGcXJtHV94x/Un1LHpxDdnBQrBwl/u2+hqZYU5z+VgunAEXAS0+fgwhnfPzhLxIASbLHOl76JESb6sFPbmzM7yg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744726472; c=relaxed/simple; bh=FBb33nzebKGaKlCOGhqoHMaf199Bj9iqcD/ZSGNhEyk=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=TEpMcGBt54/sjPCtbWDoefgijTARKxD1aJBmB9tvajZC+kDh9n3ZRe56idgYC/5ebBFN/sWOonJFqS1eG8R5MqW0a/AjyXumZMP8mf7T4i5veP4tnnwnBXBPzL3A+frnIU0kjBIEYoak8o6qSQNZH554sJMXLHlVjC+T38wdv38= 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=209.85.166.77 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-f77.google.com with SMTP id ca18e2360f4ac-85db4460f5dso1049751139f.0 for ; Tue, 15 Apr 2025 07:14:30 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1744726470; x=1745331270; 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=jVaI4aNOg3QGg9vdZU/iLIEZ2MJB4ZDSuhHpGVZGFyA=; b=vfNx+W9tgv42aENoiPvjbkzub5try7P6ZnkAgMqTOEAnhTQirOQnBTCk8SehP9OIu9 abRkBVmlvTuGIC1r19iNQSyU2eCGZTqsvAEXqXw7hibb7S6E+hzQ7W8jBO/pA3/2iXiL hmQIFyKRRadARrLPralmCPc2XHekl9vkQQFnJ5JzCSZmDnBPhgiazDwm9wKB5S0U/ZvZ yj2raQQIsod2Aj32u+yFHxj5sLqapPyBHl6kLXPkz1GcwOihccA83VsMnLShQp6Ie+J1 Mhv0a+/RQldCNQSr04GVWEw/X4LFeGHvmSBDtlDta4X6tIzbQHEzZUs2GC385e1Hjrb6 C4kw== X-Forwarded-Encrypted: i=1; AJvYcCUzQz57kfMJW/3qhBUzDbmGmL4UvNIOPE/1FNj2FdSfjcq4jNXn8CkShNdfVlP+KMY3hXLcFOIvZ5CAJaE=@vger.kernel.org X-Gm-Message-State: AOJu0YzWIBs4FmDS/MMzcd2IOmDknqhoQ10aB8lFwLJmXfm+KIrRlaGG cv768cxqTIPFEd3YpWY7o1mV13kCj7QRVJSUAR6Enq4wJOvo8SQmNR/GbKvk8ZBKsOitind5PEO Ng1FmAColhsPSaklDX/EfRwTryjuxPeIvPaMHq8seuVkWh84pcLOR1JU= X-Google-Smtp-Source: AGHT+IGNoWb8mjiEUbic2srKgNWVuuv5apmaiBpWsnnm0lLUReDXk70fxo8jFgHUzEpC2WEyYXBg/8BKwHWSNx0sGfbKJe2kdmCH Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a92:c26a:0:b0:3d4:2306:a875 with SMTP id e9e14a558f8ab-3d7ec1f661fmr172171455ab.8.1744726470017; Tue, 15 Apr 2025 07:14:30 -0700 (PDT) Date: Tue, 15 Apr 2025 07:14:29 -0700 In-Reply-To: <67ec7e14.050a0220.31979b.0031.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67fe69c5.050a0220.186b78.0002.GAE@google.com> Subject: Re: [syzbot] [f2fs?] kernel BUG in f2fs_write_end_io From: syzbot To: chao@kernel.org, jaegeuk@kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: 834a4a689699 Merge tag 'for-linus' of git://git.kernel.org.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10051a3f980000 kernel config: https://syzkaller.appspot.com/x/.config?x=a972ee73c2fcf8ca dashboard link: https://syzkaller.appspot.com/bug?extid=803dd716c4310d16ff3a 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=145a2fe4580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13382470580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-834a4a68.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4454365a3050/vmlinux-834a4a68.xz kernel image: https://storage.googleapis.com/syzbot-assets/2d99dbd9f6f4/bzImage-834a4a68.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/89819a66cafe/mount_0.gz fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=13420b98580000) IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+803dd716c4310d16ff3a@syzkaller.appspotmail.com ------------[ cut here ]------------ kernel BUG at fs/f2fs/data.c:358! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 1033 Comm: kworker/u4:5 Not tainted 6.15.0-rc2-syzkaller-00037-g834a4a689699 #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Workqueue: loop0 loop_rootcg_workfn RIP: 0010:f2fs_write_end_io+0x77a/0x790 fs/f2fs/data.c:357 Code: e8 fb d8 f0 fd e9 a2 fa ff ff 89 d9 80 e1 07 38 c1 0f 8c fe fa ff ff 48 89 df e8 81 d8 f0 fd e9 f1 fa ff ff e8 d7 9e 86 fd 90 <0f> 0b e8 9f 0a f4 07 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 RSP: 0000:ffffc90002597320 EFLAGS: 00010093 RAX: ffffffff843cb659 RBX: 0000000000000000 RCX: ffff888035d74880 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000000a RBP: ffffc90002597430 R08: ffffffff843cb306 R09: 1ffffd4000219d7d R10: dffffc0000000000 R11: fffff94000219d7e R12: 0000000000000001 R13: dffffc0000000000 R14: 000000000000000a R15: ffffea00010cebc0 FS: 0000000000000000(0000) GS:ffff88808c593000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7f3f420000 CR3: 00000000430fc000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: blk_update_request+0x5e5/0x1160 block/blk-mq.c:983 blk_mq_end_request+0x3e/0x70 block/blk-mq.c:1145 blk_flush_complete_seq+0x6bd/0xcf0 block/blk-flush.c:191 flush_end_io+0xab4/0xdc0 block/blk-flush.c:250 __blk_mq_end_request+0x492/0x5d0 block/blk-mq.c:1135 loop_handle_cmd drivers/block/loop.c:1960 [inline] loop_process_work+0x1bdf/0x21d0 drivers/block/loop.c:1978 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xac3/0x18e0 kernel/workqueue.c:3319 worker_thread+0x870/0xd50 kernel/workqueue.c:3400 kthread+0x7b7/0x940 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:f2fs_write_end_io+0x77a/0x790 fs/f2fs/data.c:357 Code: e8 fb d8 f0 fd e9 a2 fa ff ff 89 d9 80 e1 07 38 c1 0f 8c fe fa ff ff 48 89 df e8 81 d8 f0 fd e9 f1 fa ff ff e8 d7 9e 86 fd 90 <0f> 0b e8 9f 0a f4 07 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 RSP: 0000:ffffc90002597320 EFLAGS: 00010093 RAX: ffffffff843cb659 RBX: 0000000000000000 RCX: ffff888035d74880 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000000a RBP: ffffc90002597430 R08: ffffffff843cb306 R09: 1ffffd4000219d7d R10: dffffc0000000000 R11: fffff94000219d7e R12: 0000000000000001 R13: dffffc0000000000 R14: 000000000000000a R15: ffffea00010cebc0 FS: 0000000000000000(0000) GS:ffff88808c593000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7f3f420000 CR3: 00000000430fc000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.