From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=209.85.167.198 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1792595983; b=f+IMagCJOer3cvhxNzcUJwI0lX8+f5qUgdOSSf/NugSNYLux3gdmsbl/nH4Dh3PX84UM fXarUPNRiW3gF9PpPTPa8PicR7RDu9AGZv7irPWcc8HtNguNhADA3jB1baLOCd1J8JWrU e30HlcIutJrKPO/AakbeqsDrI6qG+c5jpZiVf6E+cwas4I9vGcjGx2LXnk16Crfjz8bAW g/gZg5oY5dJTkUJ96udxNZya0U1eFMry4bO4U/4hKHD81OPbPt19FOvsrX78jmWTuvTc1 DBPuMh2GaVz0rAJ8DKnam5fGLm8bnzmYplehnNNQUeX6wd9xu3ZsWQcb1IgoBz1xmqg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792595983; h=DMARC-Filter:Received:X-Google-DKIM-Signature:X-Forwarded-Encrypted: X-Gm-Message-State:MIME-Version:X-Received:Date: X-Google-Appengine-App-Id:X-Google-Appengine-App-Id-Alias:Message-ID: Subject:From:To:Content-Type; bh=d6dYEZiRYfGwCqAqnaEdKoo/lnjbYlfq/+kGQXWT0XY=; b=1PpCJu4HEV+4RzchbB8ztoPawKRYbQtw/+HRaH4H6RtymZECt906pOIn0cK8N8PIwYmi WpuX1Yq0qjUJegwMDMQWwSKMd1beGu/HzcWLkYGHho+zykGzGFSGLAEKzf5nGiBpXgmiB 7jmzDj6ktGN5tpKjNGDDvnB4FPoCqjl+L4FAiEmK1bTsOQXrs96v++LC7Dpbg9Kre8bZ8 efk3fWESPi+H6Hnbb+d+yPsph8nnAdjlbxYX7r2458jeuUvxbSh8DEpSD7WEeJ6oMfuXA AkXmeREuO2xiGKuL2Y5jhRNYiQFoRqPOSp8pk0mWWfIk/vB+ljgWzjzr5/2/7GmVO5Q== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=fail header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.remote-ip=209.85.167.198 Received: from mail-oi1-f198.google.com (mail-oi1-f198.google.com [209.85.167.198]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 85F78606A31B for ; Wed, 21 Oct 2026 15:19:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 85F78606A31B 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-oi1-f198.google.com with SMTP id 5614622812f47-4a7de733fa9so1014628b6e.3 for ; Wed, 21 Oct 2026 08:19:43 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1792595982; x=1793200782; h=content-type:to:from:subject:message-id:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=d6dYEZiRYfGwCqAqnaEdKoo/lnjbYlfq/+kGQXWT0XY=; b=hNqlii8M31icWtQo7yGsb0ASZLLnq5rQxnDh4zAiGju+GA+oEua6bChVW8MhhbA1F6 75AntfSa8jLFBBrUKeD8HP7ko96C8pDM9Io/wbm9/cvkE/2NHMzHLWLVGW1HNWs4PcOc Wnz26KDgUc7gb8FKw27Hahm+7q0U00qpyJaZSIVU9FMjglIM7Vra0lf0nyoqk40sjsmx xECE+oLlzILwwVPmMDoo0E160j1I2D8guEYV+E4dBBx47bl1Wbu2dzGPKKnExeO7LGQK ELH5A2AeO85OLWF+AwmdxYJQEkeF1C9vt5Ue5AVKWOPsYqZbHaz+MO+ooPmskGxjHCqS iVGA== X-Forwarded-Encrypted: i=1; AKwUvBzMcKCpVS4k4w2ikDp3L+xv5b9itO7jrutu7cBqzLSr1KYSS7WWcN+AcullFZC6HYg/TGsZReiFQCQEA1M=@vger.kernel.org X-Gm-Message-State: AFq9FYJsO5eClX2OV5HrbYAkBicoO5XVm45VsIeyBoXrSIOZ64F7UNny oQPW0DPFrTpP8/A4kA35WUpvNJvZABHKQg5m6ZmtmFN41oyCWMuq9DhH21pVLkORUn3g3LPp0uc MW3Eob14ts6IfWiFt08rpTwTScjZXuwF9ATl7iiYyhXIU4kI3O4Jl51O8y1g= X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 X-Received: by 2002:a05:6808:f03:b0:54c:d3dc:b544 with SMTP id 5614622812f47-5535af1ce64mr1308186b6e.32.1792595982507; Wed, 21 Oct 2026 08:19:42 -0700 (PDT) Date: Wed, 21 Oct 2026 08:19:42 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6ad8d80e.d1c214cc.659fa.0028.GAE@google.com> Subject: [syzbot] [btrfs?] WARNING in btrfs_put_transaction (6) From: syzbot To: clm@fb.com, dsterba@suse.com, linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org, mason@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 58161ead29e5 Merge tag 'drm-fixes-2026-10-17' of https://g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12d89621580000 kernel config: https://syzkaller.appspot.com/x/.config?x=4ccb65e03706547e dashboard link: https://syzkaller.appspot.com/bug?extid=08b7cbf4e9ac1f9139bf compiler: Debian clang version 22.1.8 (1~deb13u4), Debian LLD 22.1.8 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-58161ead.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/b76eb31da21c/vmlinux-58161ead.xz kernel image: https://storage.googleapis.com/syzbot-assets/fca526cf319c/bzImage-58161ead.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+08b7cbf4e9ac1f9139bf@syzkaller.appspotmail.com RAX: ffffffffffffffda RBX: 00007fc8df425fa0 RCX: 00007fc8df19e559 RDX: 000020000001e740 RSI: 000000008004587d RDI: 0000000000000008 RBP: 00007fc8df235ab8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc8df426038 R14: 00007fc8df425fa0 R15: 00007ffe864adf08 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 5, space 0, times 9992 CPU: 0 UID: 0 PID: 5325 Comm: syz.0.0 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 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 fail_dump lib/fault-inject.c:73 [inline] should_fail_ex+0x410/0x560 lib/fault-inject.c:174 should_failslab+0xa8/0x100 mm/failslab.c:46 slab_pre_alloc_hook mm/slub.c:4638 [inline] slab_alloc_node mm/slub.c:4974 [inline] kmem_cache_alloc_lru_noprof+0xa7/0x5f0 mm/slub.c:5029 __xas_nomem+0x33d/0x420 lib/xarray.c:341 __xa_cmpxchg_raw lib/xarray.c:1789 [inline] __xa_cmpxchg+0x138/0x1f0 lib/xarray.c:1769 xa_cmpxchg include/linux/xarray.h:699 [inline] xa_reserve include/linux/xarray.h:1088 [inline] add_delayed_ref+0x2ac/0x1ed0 fs/btrfs/delayed-ref.c:1073 btrfs_alloc_tree_block+0xce7/0x1160 fs/btrfs/extent-tree.c:5426 btrfs_force_cow_block+0x562/0x1bf0 fs/btrfs/ctree.c:501 btrfs_cow_block+0x3f1/0xaf0 fs/btrfs/ctree.c:696 btrfs_search_slot+0xd70/0x2d20 fs/btrfs/ctree.c:-1 btrfs_insert_empty_items+0xa3/0x1a0 fs/btrfs/ctree.c:4310 btrfs_insert_delayed_item fs/btrfs/delayed-inode.c:755 [inline] btrfs_insert_delayed_items fs/btrfs/delayed-inode.c:832 [inline] __btrfs_commit_inode_delayed_items+0xb0e/0x1ec0 fs/btrfs/delayed-inode.c:1115 __btrfs_run_delayed_items+0x1d0/0x420 fs/btrfs/delayed-inode.c:1158 btrfs_commit_transaction+0x844/0x3170 fs/btrfs/transaction.c:2384 sync_filesystem+0x1d2/0x240 fs/sync.c:66 freeze_super+0x52e/0x11c0 fs/super.c:2300 btrfs_ioctl_shutdown+0x146/0x1b0 fs/btrfs/ioctl.c:5183 btrfs_ioctl+0xbcd/0xd50 fs/btrfs/ioctl.c:5697 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc8df19e559 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007fc8e012ffe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fc8df425fa0 RCX: 00007fc8df19e559 RDX: 000020000001e740 RSI: 000000008004587d RDI: 0000000000000008 RBP: 00007fc8df235ab8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc8df426038 R14: 00007fc8df425fa0 R15: 00007ffe864adf08 BTRFS error (device loop0 state A): Transaction 9 aborted (-ENOMEM) BTRFS: error (device loop0 state A) in __btrfs_run_delayed_items:1161: errno=-12 Out of memory BTRFS info (device loop0 state EA): forced readonly BTRFS warning (device loop0 state EA): Skipping commit of aborted transaction. BTRFS: error (device loop0 state EA) in cleanup_transaction:2074: errno=-12 Out of memory ------------[ cut here ]------------ !xa_empty(&transaction->delayed_refs.head_refs) WARNING: fs/btrfs/transaction.c:146 at btrfs_put_transaction+0x537/0x570 fs/btrfs/transaction.c:146, CPU#0: syz.0.0/5325 Modules linked in: CPU: 0 UID: 0 PID: 5325 Comm: syz.0.0 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 RIP: 0010:btrfs_put_transaction+0x537/0x570 fs/btrfs/transaction.c:146 Code: fd fb ff ff e8 9a e8 ac fd 4c 89 f7 be 03 00 00 00 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d e9 6f 17 c7 00 e8 7a e8 ac fd 90 <0f> 0b 90 e9 65 fb ff ff e8 6c e8 ac fd 90 0f 0b 90 e9 82 fb ff ff RSP: 0018:ffffc9000f7978b0 EFLAGS: 00010287 RAX: ffffffff841b39b6 RBX: ffff888013966000 RCX: 0000000000100000 RDX: ffffc9000ef1a000 RSI: 000000000002eb87 RDI: 000000000002eb88 RBP: dffffc0000000000 R08: ffff888013966013 R09: 1ffff1100272cc02 R10: dffffc0000000000 R11: ffffed100272cc03 R12: ffff888053ca4758 R13: ffff888054d34d40 R14: ffff888013966350 R15: dffffc0000000000 FS: 00007fc8e01306c0(0000) GS:ffff88808b0b4000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc8d3fff000 CR3: 0000000044c6d000 CR4: 0000000000352ef0 Call Trace: cleanup_transaction+0x5c5/0x7c0 fs/btrfs/transaction.c:2122 btrfs_commit_transaction+0x2627/0x3170 fs/btrfs/transaction.c:2676 sync_filesystem+0x1d2/0x240 fs/sync.c:66 freeze_super+0x52e/0x11c0 fs/super.c:2300 btrfs_ioctl_shutdown+0x146/0x1b0 fs/btrfs/ioctl.c:5183 btrfs_ioctl+0xbcd/0xd50 fs/btrfs/ioctl.c:5697 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc8df19e559 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007fc8e012ffe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fc8df425fa0 RCX: 00007fc8df19e559 RDX: 000020000001e740 RSI: 000000008004587d RDI: 0000000000000008 RBP: 00007fc8df235ab8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc8df426038 R14: 00007fc8df425fa0 R15: 00007ffe864adf08 --- 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