From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f78.google.com (mail-ot1-f78.google.com [209.85.210.78]) (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 131A11B6D1A for ; Sun, 7 Dec 2025 09:53:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.78 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765101204; cv=none; b=m+BGcRe2b4Bg9B9LQhRp93i1jfad0uaSbzYveqbB6/u4cCXS8aAAHXrZ1yhWvdEBnFvL7EowH28QFCI6HvsnVmPi7yPC5w4nQ/tlYwCGeUcI1m/W4mRUevscyHB3kIiKwkSrfRjfB2+k3y8eeIM0TyWeMctq6GxfqzrvYRDA+7M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765101204; c=relaxed/simple; bh=92twfPPGt9hxgyNadQAHzPbf7VSSRMNTFSLNnfzSSH0=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=CVobmBOTbYHngRcUtnekOdsrRc3lqZzf6WcLrtvA2wibp5Br+5Y8KbXswA0hLKVUeUgkk53QfC7t4ze3sIMdn+O6OfHxqEa1Ow3b5pxn5JGqmMb4KXildLLRm5sxF+p+sXhiH5W62M8Rg7SLUb5e4ssIBj7Uc4/FlFNCQ4ZF54E= 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=209.85.210.78 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-ot1-f78.google.com with SMTP id 46e09a7af769-7c765a491bdso3423010a34.2 for ; Sun, 07 Dec 2025 01:53:22 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1765101202; x=1765706002; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=Z+lsl8Y/lpJKn5lZjxwPmVx4Ol41hCKi49alrntCicI=; b=bPCYKJr3I2Xax4KmmaY83H4AI6M85VcFTDzSJaeq6GXONpwqfwBZN+akcQUXPE+snF ek3n3la0XKdVq7kEBkvdygU1teYEthyNhqqiUbB/ywMUQq1y2dieLy8j2jcjlmLorRLx JzMEoW6wmtrUfB7GP9XjbNQqjkZfshLrdkDZTulE7N9SbYO4YNuDJiKq1vZjcIJwSKCj VwBrGNaZDWMBVVnDisZX2MVJaoIDUk2LTmdFEmmej7vemLwvtJKQn0IDcWOH5nRlxuet EbDFpc+lPZOIWf1V/x4tp3oCZeBj48v2FJEgGOGadBGDhlDw2LhZpYqYg4IWhO9FCLYi 3hrw== X-Forwarded-Encrypted: i=1; AJvYcCW0UCzFD01PK/N7gkzs319TtZVhKGQtnft0Kfo6xKApf7kssMn0czBl93ZL0XhtVb3H7/vGi4jMgGFDWw==@vger.kernel.org X-Gm-Message-State: AOJu0YwJweVdrjjMjHAYrN7trLf9SVJ/B727MJOOQMkROGsPzqOJwHVj ynVH88Og3rvhKvk+XCstleDIRERy6d57YmmfJcxG+4eLWyjKd2wvP/ZOV8dA3eNmEyaDhBX+ai9 +gyo9kDa1B/VuTI7OLcHLMWNBLIrUPIObEhYGxWRvibwHz8dnFfgjQHF7bCs= X-Google-Smtp-Source: AGHT+IEXTXqnXGKSrZBY/2mJudEfDMiMEKOMScWF2hk2wCHBUv6q2EJ68TgsmcW4xfs1oMOJNAVgLA3brDkvGroasfxCVZ1OFg6o Precedence: bulk X-Mailing-List: linux-btrfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:2207:b0:659:9a49:8ddd with SMTP id 006d021491bc7-6599a8eb393mr2119323eaf.31.1765101202015; Sun, 07 Dec 2025 01:53:22 -0800 (PST) Date: Sun, 07 Dec 2025 01:53:21 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69354e91.a70a0220.38f243.004e.GAE@google.com> Subject: [syzbot] [btrfs?] WARNING in __btrfs_run_delayed_items (2) From: syzbot To: clm@fb.com, dsterba@suse.com, josef@toxicpanda.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: 44fc84337b6e Merge tag 'arm64-upstream' of git://git.kerne.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=113b1192580000 kernel config: https://syzkaller.appspot.com/x/.config?x=e613d5a6bd72b912 dashboard link: https://syzkaller.appspot.com/bug?extid=64c9efba06e7ad505aef compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 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-44fc8433.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/62d35c4f6e28/vmlinux-44fc8433.xz kernel image: https://storage.googleapis.com/syzbot-assets/b8d61aa183d4/bzImage-44fc8433.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+64c9efba06e7ad505aef@syzkaller.appspotmail.com BTRFS error (device loop0): allocation failed flags 4, wanted 4096 tree-log 0, relocation: 0 BTRFS info (device loop0): space_info DATA+METADATA (sub-group id 0) has -1544192 free, is full BTRFS info (device loop0): space_info total=11534336, used=3231744, pinned=45056, reserved=8257536, may_use=1544192, readonly=0 zone_unusable=0 BTRFS info (device loop0): global_block_rsv: size 1441792 reserved 1441792 BTRFS info (device loop0): trans_block_rsv: size 0 reserved 0 BTRFS info (device loop0): chunk_block_rsv: size 0 reserved 0 BTRFS info (device loop0): delayed_block_rsv: size 98304 reserved 94208 BTRFS info (device loop0): delayed_refs_rsv: size 0 reserved 0 BTRFS info (device loop0): block group 5242880 has 1638400 bytes, 1593344 used 45056 pinned 0 reserved 0 delalloc 0 super 0 zone_unusable (0 bytes available) BTRFS info (device loop0): block group has cluster?: no BTRFS info (device loop0): 0 free space entries at or bigger than 4096 bytes BTRFS info (device loop0): block group 6881280 has 1638400 bytes, 1638400 used 0 pinned 0 reserved 0 delalloc 0 super 0 zone_unusable (0 bytes available) BTRFS info (device loop0): block group has cluster?: no BTRFS info (device loop0): 0 free space entries at or bigger than 4096 bytes BTRFS info (device loop0): block group 8519680 has 8257536 bytes, 0 used 0 pinned 0 reserved 0 delalloc 0 super 0 zone_unusable (8257536 bytes available) BTRFS critical (device loop0): entry offset 8519680, bytes 8257536, bitmap no BTRFS info (device loop0): block group has cluster?: no BTRFS info (device loop0): 1 free space entries at or bigger than 4096 bytes BTRFS info (device loop0): 8257536 bytes available across all block groups ------------[ cut here ]------------ BTRFS: Transaction aborted (error -28) WARNING: fs/btrfs/delayed-inode.c:1179 at 0x0, CPU#0: kworker/u4:24/4375 Modules linked in: CPU: 0 UID: 0 PID: 4375 Comm: kworker/u4:24 Not tainted syzkaller #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: events_unbound btrfs_async_reclaim_data_space RIP: 0010:__btrfs_run_delayed_items+0x46c/0x540 fs/btrfs/delayed-inode.c:1179 Code: 85 f6 75 07 e8 d5 c4 da fd eb 7a e8 ee b4 c0 fd 84 c0 74 20 e8 c5 c4 da fd eb 6a e8 be c4 da fd 48 8d 3d 97 0f a3 0b 44 89 e6 <67> 48 0f b9 3a e9 da fe ff ff e8 75 1e 62 07 41 89 c6 31 ff 89 c6 RSP: 0018:ffffc9000e887470 EFLAGS: 00010293 RAX: ffffffff83e64972 RBX: ffff888053d72630 RCX: ffff888033358000 RDX: 0000000000000000 RSI: 00000000ffffffe4 RDI: ffffffff8f895910 RBP: 0000000000000000 R08: ffff888033358000 R09: 0000000000000003 R10: 00000000fffffffb R11: 0000000000000000 R12: 00000000ffffffe4 R13: ffff888053c953d0 R14: ffff888052b70001 R15: 1ffff1100a7ae4c6 FS: 0000000000000000(0000) GS:ffff88808d6b7000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000037d000 CR3: 0000000042677000 CR4: 0000000000352ef0 Call Trace: btrfs_commit_transaction+0x865/0x3950 fs/btrfs/transaction.c:2325 flush_space+0x48b/0xcb0 fs/btrfs/space-info.c:888 do_async_reclaim_data_space+0x2a6/0x520 fs/btrfs/space-info.c:1410 btrfs_async_reclaim_data_space+0x41/0x90 fs/btrfs/space-info.c:1458 process_one_work kernel/workqueue.c:3263 [inline] process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3346 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 ---------------- Code disassembly (best guess): 0: 85 f6 test %esi,%esi 2: 75 07 jne 0xb 4: e8 d5 c4 da fd call 0xfddac4de 9: eb 7a jmp 0x85 b: e8 ee b4 c0 fd call 0xfdc0b4fe 10: 84 c0 test %al,%al 12: 74 20 je 0x34 14: e8 c5 c4 da fd call 0xfddac4de 19: eb 6a jmp 0x85 1b: e8 be c4 da fd call 0xfddac4de 20: 48 8d 3d 97 0f a3 0b lea 0xba30f97(%rip),%rdi # 0xba30fbe 27: 44 89 e6 mov %r12d,%esi * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: e9 da fe ff ff jmp 0xffffff0e 34: e8 75 1e 62 07 call 0x7621eae 39: 41 89 c6 mov %eax,%r14d 3c: 31 ff xor %edi,%edi 3e: 89 c6 mov %eax,%esi --- 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