loop0: detected capacity change from 0 to 32768
BTRFS: device fsid 395ef67a-297e-477c-816d-cd80a5b93e5d devid 1 transid 8 /dev/loop0 (7:0) scanned by syz.0.0 (5322)
BTRFS info (device loop0): first mount of filesystem 395ef67a-297e-477c-816d-cd80a5b93e5d
BTRFS info (device loop0): using sha256 checksum algorithm
BTRFS info (device loop0): enabling ssd optimizations
BTRFS info (device loop0): disabling tree log
BTRFS info (device loop0): turning on async discard
BTRFS info (device loop0): enabling free space tree
comedi comedi3: 8255: I/O base address not correctly aligned
BTRFS info (device loop0): balance: start -d -m
BTRFS info (device loop0): relocating block group 6881280 flags data|metadata
BTRFS info (device loop0): relocating block group 5242880 flags data|metadata
BTRFS error (device loop0): error while writing out transaction: -EIO
BTRFS error (device loop0 state A): Transaction 14 aborted (-EIO)
BTRFS: error (device loop0 state A) in btrfs_commit_transaction:2602: errno=-5 IO failure
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:2073: errno=-5 IO failure
------------[ cut here ]------------
inode->block_rsv.reserved
WARNING: fs/btrfs/inode.c:8138 at btrfs_destroy_inode+0x7ca/0x910 fs/btrfs/inode.c:8138, CPU#0: syz.0.0/5322
Modules linked in:
CPU: 0 UID: 0 PID: 5322 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_destroy_inode+0x7ca/0x910 fs/btrfs/inode.c:8138
Code: 41 5f 5d e9 88 49 fb ff e8 93 8a ab fd 90 0f 0b 90 e9 c3 f8 ff ff e8 85 8a ab fd 90 0f 0b 90 e9 ed f8 ff ff e8 77 8a ab fd 90 <0f> 0b 90 e9 22 f9 ff ff e8 69 8a ab fd 90 0f 0b 90 e9 46 f9 ff ff
RSP: 0018:ffffc9000ece78c0 EFLAGS: 00010287
RAX: ffffffff841c5149 RBX: 0000000000018000 RCX: 0000000000100000
RDX: ffffc9000f4d9000 RSI: 000000000004db4a RDI: 000000000004db4b
RBP: ffff88801af7b1e0 R08: ffff88801205e7af R09: 1ffff1100240bcf5
R10: dffffc0000000000 R11: ffffffff841c4980 R12: ffff88801af7b448
R13: 1ffff92001d9cf30 R14: ffff88801af7b570 R15: dffffc0000000000
FS:  00007fb6acb486c0(0000) GS:ffff88808c2c7000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000562a8608dda0 CR3: 0000000043987000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 destroy_inode fs/inode.c:387 [inline]
 evict+0x8fe/0xb50 fs/inode.c:846
 btrfs_relocate_block_group+0x7b7/0xaf0 fs/btrfs/relocation.c:5565
 btrfs_relocate_chunk+0x114/0x810 fs/btrfs/volumes.c:3698
 __btrfs_balance+0x1b5f/0x29d0 fs/btrfs/volumes.c:4637
 btrfs_balance+0xaa6/0x1180 fs/btrfs/volumes.c:5024
 btrfs_ioctl_balance+0x3da/0x640 fs/btrfs/ioctl.c:3494
 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: 0033:0x7fb6abb9e159
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:00007fb6acb47fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fb6abe25fa0 RCX: 00007fb6abb9e159
RDX: 0000200000000180 RSI: 00000000c4009420 RDI: 0000000000000008
RBP: 00007fb6abc3503b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb6abe26038 R14: 00007fb6abe25fa0 R15: 00007ffedd5b03b8
 </TASK>