From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f78.google.com (mail-oo1-f78.google.com [209.85.161.78]) (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 9FCB6381C4 for ; Thu, 14 May 2026 05:28:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.78 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778736505; cv=none; b=ZYdWqc7OS0aS/zXg7uj/GVQsk4RXFBGyNnEIzK0YzxMzBR+BtNeVCrkf88Zw1+T7C8U5eE42eDZe/9OSj8XV/28hymR6KTdUO6N8k2hAQKNUHBZVAiLvVQjJ9braQ/j2maQSs4dkFU9ULAHNmr1r6azPWijjHymg0qFvydhJQSc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778736505; c=relaxed/simple; bh=aku17M/sQev3oaKTNXNJ8STv2pfD1k7HOYMFFLkVdew=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=P1WiT+xQPb4M55Mi4j3TjXw41OhbR3Uy47pAzpxltgTnwFOx5nbFg5bhh83iuuk6FgvLLl0gZMAoivbQbKX/UUvdqRfELPm8mrdfhJ4YRGunyujEKUrwauNa70RRHQ+bEr1Q2WZs+FPGXSNCL1b9Lya6wsIyyu3xeQfv/Whl960= 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=209.85.161.78 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-f78.google.com with SMTP id 006d021491bc7-6963482e03dso2935255eaf.3 for ; Wed, 13 May 2026 22:28:23 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1778736502; x=1779341302; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=rGKLmcXgAz+cHoHGT/zmwSWSQzX/M0B0YH8CUyeHKD0=; b=au1ojv+aPuY7R2smuk3FsEOicSerSQfocyPyGabuzD0d3lFjwPLaEozDeb+XpafxjV D57ooW62xy75CXdjlPgYMswEOtAIzHsikFU22fJjUrn7VsnKSiH9EXJD1zGWo19VJ5HG 9gnWlBDI9v5ygd3Y9HDNCkPdBozqy6awmcSFVEgkx4knE5RmMAWa5kjxwByFffBSqtms G2KamNmzKwAr8uGOp3DJEKkIowAB4H62iLJ9F/fdqAnanHZV9WAqAQ5OYsOTPQU2aKY/ 8aCXbrhHl4Pk6PSqFOwyNkYfP/mcAVRPGLV2Ca6qFqi+i05ixFTya0nb1UOWE9I7fQDn 2iXw== X-Forwarded-Encrypted: i=1; AFNElJ9IWEWhRUwegd3DUX+k6mLeqyQCV0WiX82WVSJtP5ZEHUfZr78y37PW97sy46H8shB6CRwEf5kU6xROAVY=@vger.kernel.org X-Gm-Message-State: AOJu0YzrO7PHkSpwYOHE9LLjQpdO6FAE8/P6RgJbHrkm1DCRlNv34888 4iVYwWEPuFv40JJQahHXd63hENPwk7edYQ2CcbSJ8Y87vv6KKfoKk+TCP4foXNtCTL146ydOLeT iAoWIbU8y4+vW8GbiLJ771+iUSiaMqUNVLzqkJm6uKnpjTIqEhg8jGGpY5dI= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:150f:b0:696:2cb1:a007 with SMTP id 006d021491bc7-69b78d5b3d2mr3548681eaf.24.1778736502502; Wed, 13 May 2026 22:28:22 -0700 (PDT) Date: Wed, 13 May 2026 22:28:22 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a055d76.050a0220.d11c8.0003.GAE@google.com> Subject: [syzbot] [f2fs?] kernel BUG in f2fs_put_super (5) 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: ec8957276674 Merge tag 'hwmon-for-v7.1-rc3' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1030f1ce580000 kernel config: https://syzkaller.appspot.com/x/.config?x=f2e8ebfec4636d32 dashboard link: https://syzkaller.appspot.com/bug?extid=8b8205b83afd5cbdabaf 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/cd85c29cb989/disk-ec895727.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/753d9d274777/vmlinux-ec895727.xz kernel image: https://storage.googleapis.com/syzbot-assets/3f65991d8333/bzImage-ec895727.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+8b8205b83afd5cbdabaf@syzkaller.appspotmail.com F2FS-fs (loop3): Stopped filesystem due to reason: 3 F2FS-fs (loop3): detect filesystem reference count leak during umount, type: 2, count: -1 ------------[ cut here ]------------ kernel BUG at fs/f2fs/super.c:2061! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 1 UID: 0 PID: 5607 Comm: syz-executor Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 RIP: 0010:f2fs_put_super+0x1451/0x1460 fs/f2fs/super.c:2061 Code: fd 41 bf 0d 00 00 00 4c 89 ef 44 89 fe e8 47 3f 00 00 4c 89 ef 31 f6 48 c7 c2 40 04 9b 8b 44 89 f9 49 89 c0 e8 80 4a fd ff 90 <0f> 0b 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 RSP: 0018:ffffc90004f67900 EFLAGS: 00010246 RAX: c02b1e247a139300 RBX: 1ffff11007f8a85a RCX: c02b1e247a139300 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90004f67b58 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: fffff520009ecea9 R12: dffffc0000000000 R13: ffff88803fc54000 R14: 00000000ffffffff R15: 0000000000000002 FS: 000055555e19c500(0000) GS:ffff888126276000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1d7b1dc000 CR3: 000000003f6c6000 CR4: 00000000003526f0 Call Trace: generic_shutdown_super+0x13d/0x2d0 fs/super.c:646 kill_block_super+0x44/0x90 fs/super.c:1725 kill_f2fs_super+0x402/0x730 fs/f2fs/super.c:5534 deactivate_locked_super+0xbc/0x130 fs/super.c:476 cleanup_mnt+0x437/0x4d0 fs/namespace.c:1312 task_work_run+0x1d9/0x270 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:67 [inline] exit_to_user_mode_loop+0xf3/0x4d0 kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:238 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline] do_syscall_64+0x33e/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5dfa74e017 Code: a2 c7 05 dc 06 25 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007ffea8646e48 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 00007f5dfa7e2120 RCX: 00007f5dfa74e017 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffea8646f00 RBP: 00007ffea8646f00 R08: 00007ffea8647f00 R09: 00000000ffffffff R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffea8647f90 R13: 00007f5dfa7e2120 R14: 00000000000438b6 R15: 00007ffea8647fd0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:f2fs_put_super+0x1451/0x1460 fs/f2fs/super.c:2061 Code: fd 41 bf 0d 00 00 00 4c 89 ef 44 89 fe e8 47 3f 00 00 4c 89 ef 31 f6 48 c7 c2 40 04 9b 8b 44 89 f9 49 89 c0 e8 80 4a fd ff 90 <0f> 0b 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 RSP: 0018:ffffc90004f67900 EFLAGS: 00010246 RAX: c02b1e247a139300 RBX: 1ffff11007f8a85a RCX: c02b1e247a139300 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90004f67b58 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: fffff520009ecea9 R12: dffffc0000000000 R13: ffff88803fc54000 R14: 00000000ffffffff R15: 0000000000000002 FS: 000055555e19c500(0000) GS:ffff888126276000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1d7b1dc000 CR3: 000000003f6c6000 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