From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oa1-f77.google.com (mail-oa1-f77.google.com [209.85.160.77]) (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 88340346ACE for ; Fri, 24 Apr 2026 07:54:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.160.77 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777017275; cv=none; b=tuOPH0EkwX5aOVnPV8hFEf4AF/jkRA/ROImSktRCjDlXJtR0/K5TTaUxUpGoHyaPAnJDdQ8FIk5hMevQSpf/JVBIuHd0xpRr20qXmpWP/XRfOHgfMz3qoiV9lwvJN6k8RDV3+bDXqEb4gpek4mLXblAel0hGuxJchLxNqDiPeLM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777017275; c=relaxed/simple; bh=MaraI430aZsozOsdIp+Rf471L3nAQsLpcrEn6ChTYKk=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=b1687IicwMQE/SgbOJCOe5vIJ630oDoROpEfJwwJugdH0pRVTXjmY0ifmWCbNGNCJbNo4n5ngmBb3MfpmePd6iJU1+GlrQ2Jkd/h9e4fo4uqUtgj3Dtlaqfz2wfSZ7Y8f4ZWgM9mUAGn7FzGEY6cFn0RQz4M66+tQnmb/otVdyA= 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=209.85.160.77 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-oa1-f77.google.com with SMTP id 586e51a60fabf-42394108a90so13879999fac.0 for ; Fri, 24 Apr 2026 00:54:33 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777017272; x=1777622072; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=eFKi649ZkY5D599kqoYXiEqrp7pEoyOSrvNmABzUs8c=; b=PLn0ojo2/mimAwVVYXRQtMYl6AE+MT2ythsKqA0jNsRwCSPAfCo5g8AEh0lcX0aXDe sBKMKwzuxRGfo8yaFMtYUAu0BJKdgxaJq0UTsdkceFwNrlPIFknZUEffDpzsnXRzL2Q2 mAAPzSlX08GD0H/5Q+XyZoke6WigqPfnE/Jl5LFX5wWRIJenSTJJLvojYYMrcemh1BOc w2FTrMjlWwXRMLd2snLzv/mg20Ks8GLaONDVSaSJ+8pQqGEPHUSDwu5g6SJ+XDPaD+an Pemcoe/3JPKRBoOT+xInZluOot30UNWS7Aa2nmXABsrkUwRB/+iSyT+ycVIzMPu43lAS UbpQ== X-Forwarded-Encrypted: i=1; AFNElJ9XFCY42wiIRP5EreDOKK2KVZeJe/Lovl2CtCobUwVL3tRez6s3jRQSyq1MBGEk0CfhbByiUouyP9Tf9oY=@vger.kernel.org X-Gm-Message-State: AOJu0YxVVRGosww7qJ9/NVKJxMTlvLl0PhUOLtl0h0nUsFJqnjxigZjw gQVQVFEHq9NczSr2cNv3abamfMAHl152gijfMKzofW9LSGH4O7/tqzoeJ86lATZquFgBDX6NUGk +L/wfdxJ3y+zbKjG5kO0mu7faPLVZ9KGsBZ7GwREQR1s+6fxIIKn/v184uYo= 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:f005:b0:696:1be1:92d0 with SMTP id 006d021491bc7-6961be1a142mr3331947eaf.30.1777017272621; Fri, 24 Apr 2026 00:54:32 -0700 (PDT) Date: Fri, 24 Apr 2026 00:54:32 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69eb21b8.a00a0220.17a17.0056.GAE@google.com> Subject: [syzbot] [btrfs?] WARNING in __btrfs_update_delayed_inode (4) From: syzbot To: clm@fb.com, dsterba@suse.com, linux-btrfs@vger.kernel.org, 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: bea8d77e45a8 Merge tag 'staging-7.1-rc1' of git://git.kern.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1636202a580000 kernel config: https://syzkaller.appspot.com/x/.config?x=f8c5ce991a39e5d9 dashboard link: https://syzkaller.appspot.com/bug?extid=768687d6d7c96a124e24 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 (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-bea8d77e.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/fa29d85c34c6/vmlinux-bea8d77e.xz kernel image: https://storage.googleapis.com/syzbot-assets/c65a4276191b/bzImage-bea8d77e.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+768687d6d7c96a124e24@syzkaller.appspotmail.com ------------[ cut here ]------------ BTRFS: Transaction aborted (error -28) WARNING: fs/btrfs/delayed-inode.c:1027 at __btrfs_update_delayed_inode+0xe3d/0x1070 fs/btrfs/delayed-inode.c:1027, CPU#0: kworker/u4:5/70 Modules linked in: CPU: 0 UID: 0 PID: 70 Comm: kworker/u4:5 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Workqueue: events_unbound btrfs_async_reclaim_data_space RIP: 0010:__btrfs_update_delayed_inode+0xe40/0x1070 fs/btrfs/delayed-inode.c:1027 Code: bc bd fd e9 22 01 00 00 e8 7d d1 a2 fd 84 c0 74 23 e8 a4 bc bd fd e9 0f 01 00 00 e8 9a bc bd fd 48 8d 3d 63 e8 34 0c 44 89 ee <67> 48 0f b9 3a e9 31 01 00 00 e8 51 38 b1 07 89 c3 31 ff 89 c6 e8 RSP: 0018:ffffc90000cff140 EFLAGS: 00010293 RAX: ffffffff84082226 RBX: 00000000ffffffe4 RCX: ffff888000bc4a00 RDX: 0000000000000000 RSI: 00000000ffffffe4 RDI: ffffffff903d0a90 RBP: ffffc90000cff270 R08: ffff888000bc4a00 R09: 0000000000000003 R10: 00000000fffffffb R11: 0000000000000000 R12: ffff888011cf9200 R13: 00000000ffffffe4 R14: 0000000000000000 R15: ffff888012ef93c0 FS: 0000000000000000(0000) GS:ffff88808c812000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4b4adeaff8 CR3: 000000001f399000 CR4: 0000000000352ef0 Call Trace: btrfs_update_delayed_inode fs/btrfs/delayed-inode.c:1103 [inline] __btrfs_commit_inode_delayed_items+0x1dfa/0x1f50 fs/btrfs/delayed-inode.c:1127 __btrfs_run_delayed_items+0x1f6/0x510 fs/btrfs/delayed-inode.c:1158 btrfs_commit_transaction+0x836/0x30e0 fs/btrfs/transaction.c:2376 flush_space+0x2a3/0xe20 fs/btrfs/space-info.c:-1 do_async_reclaim_data_space+0x29a/0x520 fs/btrfs/space-info.c:1464 btrfs_async_reclaim_data_space+0x41/0x90 fs/btrfs/space-info.c:1512 process_one_work kernel/workqueue.c:3302 [inline] process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3385 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3466 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 ---------------- Code disassembly (best guess): 0: bc bd fd e9 22 mov $0x22e9fdbd,%esp 5: 01 00 add %eax,(%rax) 7: 00 e8 add %ch,%al 9: 7d d1 jge 0xffffffdc b: a2 fd 84 c0 74 23 e8 movabs %al,0xbca4e82374c084fd 12: a4 bc 14: bd fd e9 0f 01 mov $0x10fe9fd,%ebp 19: 00 00 add %al,(%rax) 1b: e8 9a bc bd fd call 0xfdbdbcba 20: 48 8d 3d 63 e8 34 0c lea 0xc34e863(%rip),%rdi # 0xc34e88a 27: 44 89 ee mov %r13d,%esi * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: e9 31 01 00 00 jmp 0x165 34: e8 51 38 b1 07 call 0x7b1388a 39: 89 c3 mov %eax,%ebx 3b: 31 ff xor %edi,%edi 3d: 89 c6 mov %eax,%esi 3f: e8 .byte 0xe8 --- 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