kworker/u4:0: attempt to access beyond end of device
loop0: rw=67108865, sector=10536, nr_sectors = 8 limit=64
BTRFS error (device loop0 state EA): bdev /dev/loop0 errs: wr 7, rd 0, flush 0, corrupt 0, gen 0
------------[ cut here ]------------
WARNING: CPU: 0 PID: 12 at fs/btrfs/inode.c:3450 btrfs_add_delayed_iput+0x2f8/0x370 fs/btrfs/inode.c:3450
Modules linked in:
CPU: 0 UID: 0 PID: 12 Comm: kworker/u4:0 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: blkcg_punt_bio blkg_async_bio_workfn
RIP: 0010:btrfs_add_delayed_iput+0x2f8/0x370 fs/btrfs/inode.c:3450
Code: 3e ec 57 fe 48 8b 3b 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d e9 68 a3 c0 fd e8 33 ad f0 fd e9 e6 fd ff ff e8 29 ad f0 fd 90 <0f> 0b 90 e9 41 fe ff ff 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 72
RSP: 0018:ffffc900001e78e0 EFLAGS: 00010293
RAX: ffffffff83cf6907 RBX: ffff88804dee0000 RCX: ffff88801ab0c900
RDX: 0000000000000000 RSI: 0000000000000200 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffff88804dee1b77 R09: 1ffff11009bdc36e
R10: dffffc0000000000 R11: ffffed1009bdc36f R12: 0000000000000001
R13: dffffc0000000000 R14: ffff8880409019e0 R15: 0000000000000200
FS:  0000000000000000(0000) GS:ffff88808d732000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff68216b80 CR3: 000000004d0d8000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 btrfs_put_ordered_extent+0x19f/0x470 fs/btrfs/ordered-data.c:635
 blkg_async_bio_workfn+0x139/0x1a0 block/blk-cgroup.c:224
 process_one_work kernel/workqueue.c:3263 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>