BTRFS critical (device loop0 state E): emergency shutdown
BTRFS info (device loop0 state E): last unmount of filesystem c9fe44da-de57-406a-8241-57ec7d4412cf
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1
WARNING: fs/btrfs/space-info.h:286 at btrfs_space_info_update_bytes_may_use+0x318/0x650 fs/btrfs/space-info.h:286, CPU#0: syz.0.0/5330
Modules linked in:
CPU: 0 UID: 0 PID: 5330 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_space_info_update_bytes_may_use+0x318/0x650 fs/btrfs/space-info.h:286
Code: 00 00 74 08 4c 89 ff e8 76 1f 18 fe 4d 8b 27 4c 89 e7 48 8b 6c 24 18 48 89 ee e8 43 fc a8 fd 49 39 ec 73 1c e8 d9 f9 a8 fd 90 <0f> 0b 90 31 db 43 80 7c 35 00 00 0f 85 48 ff ff ff e9 4b ff ff ff
RSP: 0018:ffffc9000373f678 EFLAGS: 00010293
RAX: ffffffff841d4717 RBX: fffffffffff00000 RCX: ffff88800027a540
RDX: 0000000000000000 RSI: 0000000000100000 RDI: 00000000000ff000
RBP: 0000000000100000 R08: ffffffff9032f6f7 R09: 1ffffffff2065ede
R10: dffffc0000000000 R11: fffffbfff2065edf R12: 00000000000ff000
R13: 1ffff11002359010 R14: dffffc0000000000 R15: ffff888011ac8080
FS:  0000000000000000(0000) GS:ffff88808c81c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbf4a31d120 CR3: 0000000012488000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 btrfs_space_info_free_bytes_may_use fs/btrfs/space-info.h:323 [inline]
 block_rsv_release_bytes fs/btrfs/block-rsv.c:153 [inline]
 btrfs_block_rsv_release+0x47b/0x590 fs/btrfs/block-rsv.c:291
 btrfs_release_global_block_rsv+0x33/0x300 fs/btrfs/block-rsv.c:462
 btrfs_free_block_groups+0xdf1/0x1090 fs/btrfs/block-group.c:4777
 close_ctree+0x788/0x11b0 fs/btrfs/disk-io.c:4542
 generic_shutdown_super+0x13d/0x2d0 fs/super.c:647
 kill_anon_super+0x3b/0x70 fs/super.c:1232
 btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2154
 deactivate_locked_super+0xbc/0x130 fs/super.c:477
 cleanup_mnt+0x3d3/0x460 fs/namespace.c:1317
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x73a/0x2360 kernel/exit.c:1004
 do_group_exit+0x22d/0x2f0 kernel/exit.c:1147
 get_signal+0x121b/0x12c0 kernel/signal.c:3038
 arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
 exit_to_user_mode_loop+0x104/0x730 kernel/entry/common.c:101
 __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:230 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline]
 do_syscall_64+0x353/0x580 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f94e759ce59
Code: Unable to access opcode bytes at 0x7f94e759ce2f.
RSP: 002b:00007f94e84a20a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007f94e7816098 RCX: 00007f94e759ce59
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f94e781609c
RBP: 00007f94e7816090 R08: 3fffffffffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f94e7816128 R14: 00007ffd439b46d0 R15: 00007ffd439b47b8
 </TASK>