From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f71.google.com (mail-oo1-f71.google.com [209.85.161.71]) (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 2086B28BA95 for ; Tue, 10 Mar 2026 20:22:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.71 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773174142; cv=none; b=H0416yl3EakbG6Gym9vn4FmN5dpz2YE/wepGcSstT+ULcoxlmFe13jiMCIVLesMAdFeMZD5rsZqPPpNnKfJ5y/0rdfKxRKmzdR5GkMSGLp+oRkL0Mc2sAYtrqUi3w+UJINWNN8S4WjaOvA7/o7lKQSsXCisFAVngMzI6yjAvznQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773174142; c=relaxed/simple; bh=RWKP0TLjOYh3LOqBXWJX3fXMknxo511tMxmCe/N85wk=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=qOfTVTZxZrRtFC1+7GcN7+3H7bB0Z9fOIyDLr/iBJhtas67kOwsU0xm5Z2mpNLTcEfdZTGnpk1/HbpnNNVUvCCqIW5LtTUZYTdhgYRIXxVPp/dKAXuAzITrLnP0+mNig5MdE9waBFun3/sThu17chX0VETTm4jSLDkfWe/PIPLw= 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=209.85.161.71 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-oo1-f71.google.com with SMTP id 006d021491bc7-67bb6081a0dso32005791eaf.2 for ; Tue, 10 Mar 2026 13:22:20 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1773174140; x=1773778940; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=bjBF6qoYBijr9UqZ/693jcBIL08PLtrpQB2lTanJAtc=; b=SXkJHX4rsY8N6OI4SO9VIclRop4lXcrGmQeITWhFTPsdtXgMZMcheZmgn2TNurdd+J cNSdtmmOPP3/t1gt6HO4WLqqeZfGX27wumRCoaFIeLZglDTHxaZv+hry2wsXrhYDAp13 NjDilrJFjlon71IojewtZKyqwVBsJFpPVQFGWm5YtHgXZqG9t/+lZnVBN3xfeivSLjtD r6/Ig2e/A3JIrNG18pIdIQ0WW0XC22cq51dcpI6RWwQAz9Ohehswi4/oF/4x0KVolPj8 pKBOgwoBpaEl+i+YrGtlNs/oGfAfx3svuTdwr9j9b+ClA0QkMLKkxY+tCvIX0Yr27YdW WaHw== X-Forwarded-Encrypted: i=1; AJvYcCW14ilcSbpd8otF+upRhpvYO0uLuAbUZsyz0KxNxU1fc6vfgu7OpPQRhnfNGxM4JGtLj+qpz8z3rgtWbT8=@vger.kernel.org X-Gm-Message-State: AOJu0YwwzNJklloisAD977R6ZH/ZXZSbyUD06pHC7g94ZqcFA6Ze1pdj seFC2heW8CmRH0YnBKd/eR6qZ54uobmivxPTpqF0nrFIoXx5NQJ+qu7bebKJCa1uI7+ULrxRDEj JaktM19PO4CDcsc24NqdVqpwWpq1Vifx0Tx0l8xIXtwzpq35fjJE1mab4myM= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:3086:b0:67b:b45c:bd71 with SMTP id 006d021491bc7-67bc8a8a653mr72541eaf.73.1773174140016; Tue, 10 Mar 2026 13:22:20 -0700 (PDT) Date: Tue, 10 Mar 2026 13:22:20 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69b07d7c.050a0220.8df7.09a1.GAE@google.com> Subject: [syzbot] [f2fs?] kernel BUG in f2fs_issue_discard_timeout 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" Hello, syzbot found the following issue on: HEAD commit: 651690480a96 Merge tag 'spi-fix-v7.0-rc2' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=157f58d6580000 kernel config: https://syzkaller.appspot.com/x/.config?x=2a019678b1a3a692 dashboard link: https://syzkaller.appspot.com/bug?extid=62538b67389ee582837a compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/fd03debd6a84/disk-65169048.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/6a72bd6fa116/vmlinux-65169048.xz kernel image: https://storage.googleapis.com/syzbot-assets/251bc9642a29/bzImage-65169048.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+62538b67389ee582837a@syzkaller.appspotmail.com ------------[ cut here ]------------ kernel BUG at fs/f2fs/segment.c:1900! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 1 UID: 0 PID: 6527 Comm: syz.5.110 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:f2fs_issue_discard_timeout+0x59b/0x5a0 fs/f2fs/segment.c:1900 Code: d9 80 e1 07 80 c1 03 38 c1 0f 8c d6 fe ff ff 48 89 df e8 a8 5e fa fd e9 c9 fe ff ff e8 4e 46 94 fd 90 0f 0b e8 46 46 94 fd 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 RSP: 0018:ffffc9000494f940 EFLAGS: 00010283 RAX: ffffffff843009ca RBX: 0000000000000001 RCX: 0000000000080000 RDX: ffffc9001ca78000 RSI: 00000000000029f3 RDI: 00000000000029f4 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed100893a431 R12: 1ffff1100893a430 R13: 1ffff1100c2b702c R14: dffffc0000000000 R15: ffff8880449d2160 FS: 00007ffa35fed6c0(0000) GS:ffff88812643d000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2b68634000 CR3: 0000000039f62000 CR4: 00000000003526f0 Call Trace: __f2fs_remount fs/f2fs/super.c:2960 [inline] f2fs_reconfigure+0x108a/0x1710 fs/f2fs/super.c:5443 reconfigure_super+0x227/0x8a0 fs/super.c:1080 do_remount fs/namespace.c:3391 [inline] path_mount+0xdc5/0x10e0 fs/namespace.c:4151 do_mount fs/namespace.c:4172 [inline] __do_sys_mount fs/namespace.c:4361 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4338 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ffa37dbda0a Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffa35fece58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffa35fecee0 RCX: 00007ffa37dbda0a RDX: 0000200000000180 RSI: 0000200000000000 RDI: 0000000000000000 RBP: 0000200000000180 R08: 00007ffa35fecee0 R09: 00000000018424bc R10: 00000000018424bc R11: 0000000000000246 R12: 0000200000000000 R13: 00007ffa35fecea0 R14: 0000000000000000 R15: 00002000000003c0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:f2fs_issue_discard_timeout+0x59b/0x5a0 fs/f2fs/segment.c:1900 Code: d9 80 e1 07 80 c1 03 38 c1 0f 8c d6 fe ff ff 48 89 df e8 a8 5e fa fd e9 c9 fe ff ff e8 4e 46 94 fd 90 0f 0b e8 46 46 94 fd 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 RSP: 0018:ffffc9000494f940 EFLAGS: 00010283 RAX: ffffffff843009ca RBX: 0000000000000001 RCX: 0000000000080000 RDX: ffffc9001ca78000 RSI: 00000000000029f3 RDI: 00000000000029f4 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed100893a431 R12: 1ffff1100893a430 R13: 1ffff1100c2b702c R14: dffffc0000000000 R15: ffff8880449d2160 FS: 00007ffa35fed6c0(0000) GS:ffff88812643d000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2b68634000 CR3: 0000000039f62000 CR4: 00000000003526f0 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup