BTRFS info (device loop3): last unmount of filesystem aefc7358-489c-4ff1-9c66-a45c4d4abe76 assertion failed: list_empty(&fs_info->delalloc_roots) :: 0, in fs/btrfs/disk-io.c:4374 ------------[ cut here ]------------ kernel BUG at fs/btrfs/disk-io.c:4374! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 1 UID: 0 PID: 5835 Comm: syz-executor Not tainted 6.15.0-next-20250606-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:close_ctree+0xa00/0xd60 fs/btrfs/disk-io.c:4374 Code: 03 31 d2 48 39 d8 0f 94 c2 48 c7 c7 60 3f cd 8b 48 c7 c6 c0 6e cd 8b 48 c7 c1 e0 3f cd 8b 41 b8 16 11 00 00 e8 61 d7 fd ff 90 <0f> 0b e8 e9 a6 96 00 48 8b 7c 24 18 be 08 00 00 00 e8 2a 21 fa 00 RSP: 0018:ffffc900043d7b60 EFLAGS: 00010246 RAX: 0000000000000057 RBX: ffff8880333b0f98 RCX: 48ff5f9ec1d26e00 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffffc900043d7d00 R08: ffffc900043d7887 R09: 1ffff9200087af10 R10: dffffc0000000000 R11: fffff5200087af11 R12: ffff8880333b0000 R13: 1ffff11006676202 R14: 1ffff110066761f3 R15: ffff8880333b1010 FS: 000055557fe39500(0000) GS:ffff888125d4d000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000036b030 CR3: 000000007aea2000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: generic_shutdown_super+0x135/0x2c0 fs/super.c:643 kill_anon_super+0x3b/0x70 fs/super.c:1280 btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2095 deactivate_locked_super+0xb9/0x130 fs/super.c:474 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1417 task_work_run+0x1d1/0x260 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:114 exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline] do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0d5478fc57 Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 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 a8 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007ffc98909308 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 00007f0d54810925 RCX: 00007f0d5478fc57 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc989093c0 RBP: 00007ffc989093c0 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc9890a450 R13: 00007f0d54810925 R14: 000000000003046c R15: 00007ffc9890a490 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:close_ctree+0xa00/0xd60 fs/btrfs/disk-io.c:4374 Code: 03 31 d2 48 39 d8 0f 94 c2 48 c7 c7 60 3f cd 8b 48 c7 c6 c0 6e cd 8b 48 c7 c1 e0 3f cd 8b 41 b8 16 11 00 00 e8 61 d7 fd ff 90 <0f> 0b e8 e9 a6 96 00 48 8b 7c 24 18 be 08 00 00 00 e8 2a 21 fa 00 RSP: 0018:ffffc900043d7b60 EFLAGS: 00010246 RAX: 0000000000000057 RBX: ffff8880333b0f98 RCX: 48ff5f9ec1d26e00 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffffc900043d7d00 R08: ffffc900043d7887 R09: 1ffff9200087af10 R10: dffffc0000000000 R11: fffff5200087af11 R12: ffff8880333b0000 R13: 1ffff11006676202 R14: 1ffff110066761f3 R15: ffff8880333b1010 FS: 000055557fe39500(0000) GS:ffff888125d4d000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6831890368 CR3: 000000007aea2000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400