BTRFS info (device loop0): balance: start -d -m -s
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 1
CPU: 0 UID: 0 PID: 5329 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:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 fail_dump lib/fault-inject.c:73 [inline]
 should_fail_ex+0x412/0x560 lib/fault-inject.c:174
 should_failslab+0xa8/0x100 mm/failslab.c:46
 slab_pre_alloc_hook mm/slub.c:4522 [inline]
 slab_alloc_node mm/slub.c:4875 [inline]
 kmem_cache_alloc_noprof+0x87/0x650 mm/slub.c:4905
 add_delayed_ref+0x118/0x1e70 fs/btrfs/delayed-ref.c:1045
 btrfs_alloc_tree_block+0xd27/0x1280 fs/btrfs/extent-tree.c:5419
 btrfs_force_cow_block+0x562/0x2450 fs/btrfs/ctree.c:504
 btrfs_cow_block+0x3c4/0xa90 fs/btrfs/ctree.c:699
 btrfs_search_slot+0xd13/0x2d20 fs/btrfs/ctree.c:2112
 btrfs_update_device+0x13b/0x4f0 fs/btrfs/volumes.c:3073
 btrfs_chunk_alloc_add_chunk_item+0x2b2/0x1290 fs/btrfs/volumes.c:6157
 do_chunk_alloc fs/btrfs/block-group.c:4128 [inline]
 btrfs_chunk_alloc+0x9ce/0x15e0 fs/btrfs/block-group.c:4423
 btrfs_inc_block_group_ro+0x41e/0x7c0 fs/btrfs/block-group.c:3195
 btrfs_relocate_block_group+0x3bb/0xc40 fs/btrfs/relocation.c:5377
 btrfs_relocate_chunk+0x115/0x820 fs/btrfs/volumes.c:3598
 __btrfs_balance+0x1db0/0x2ae0 fs/btrfs/volumes.c:4509
 btrfs_balance+0xaf3/0x11b0 fs/btrfs/volumes.c:4896
 btrfs_ioctl_balance+0x3d3/0x610 fs/btrfs/ioctl.c:3453
 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:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5ed7d9ce59
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:00007f5ed8c0bfe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f5ed8016090 RCX: 00007f5ed7d9ce59
RDX: 0000200000000180 RSI: 00000000c4009420 RDI: 0000000000000004
RBP: 00007f5ed8c0c050 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007f5ed8016128 R14: 00007f5ed8016090 R15: 00007ffc6c9a9678
 </TASK>
BTRFS error (device loop0 state A): Transaction aborted (error -12)
BTRFS: error (device loop0 state A) in do_chunk_alloc:4198: errno=-12 Out of memory
BTRFS info (device loop0 state EA): forced readonly
------------[ cut here ]------------
1
WARNING: fs/btrfs/space-info.h:275 at btrfs_space_info_update_bytes_may_use+0x318/0x650 fs/btrfs/space-info.h:275, CPU#0: syz.0.0/5329
Modules linked in:
CPU: 0 UID: 0 PID: 5329 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:275
Code: 00 00 74 08 4c 89 ff e8 86 8c 1c fe 4d 8b 27 4c 89 e7 48 8b 6c 24 18 48 89 ee e8 23 c3 af fd 49 39 ec 73 1c e8 b9 c0 af 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:ffffc9000e3677b8 EFLAGS: 00010293
RAX: ffffffff84161087 RBX: fffffffffffe8000 RCX: ffff88801f80ca00
RDX: 0000000000000000 RSI: 0000000000018000 RDI: 0000000000017000
RBP: 0000000000018000 R08: ffffffff9030daf7 R09: 1ffffffff2061b5e
R10: dffffc0000000000 R11: fffffbfff2061b5f R12: 0000000000017000
R13: 1ffff110081d9710 R14: dffffc0000000000 R15: ffff888040ecb880
FS:  00007f5ed8c0c6c0(0000) GS:ffff88808c881000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5ed8bd1fe8 CR3: 000000000e511000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 btrfs_space_info_free_bytes_may_use fs/btrfs/space-info.h:312 [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_trans_release_chunk_metadata+0x7f/0xb0 fs/btrfs/transaction.c:262
 do_chunk_alloc fs/btrfs/block-group.c:4202 [inline]
 btrfs_chunk_alloc+0xf4c/0x15e0 fs/btrfs/block-group.c:4423
 btrfs_inc_block_group_ro+0x41e/0x7c0 fs/btrfs/block-group.c:3195
 btrfs_relocate_block_group+0x3bb/0xc40 fs/btrfs/relocation.c:5377
 btrfs_relocate_chunk+0x115/0x820 fs/btrfs/volumes.c:3598
 __btrfs_balance+0x1db0/0x2ae0 fs/btrfs/volumes.c:4509
 btrfs_balance+0xaf3/0x11b0 fs/btrfs/volumes.c:4896
 btrfs_ioctl_balance+0x3d3/0x610 fs/btrfs/ioctl.c:3453
 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:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5ed7d9ce59
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:00007f5ed8c0bfe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f5ed8016090 RCX: 00007f5ed7d9ce59
RDX: 0000200000000180 RSI: 00000000c4009420 RDI: 0000000000000004
RBP: 00007f5ed8c0c050 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007f5ed8016128 R14: 00007f5ed8016090 R15: 00007ffc6c9a9678
 </TASK>