------------[ cut here ]------------
btrfs_abort_should_print_stack(__error)
WARNING: fs/btrfs/qgroup.c:1077 at btrfs_quota_enable+0x1acf/0x1e20 fs/btrfs/qgroup.c:1077, CPU#0: syz.0.0/5316
Modules linked in:
CPU: 0 UID: 0 PID: 5316 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_quota_enable+0x1acf/0x1e20 fs/btrfs/qgroup.c:1077
Code: 08 00 00 00 4c 89 e7 e8 4f fe 04 fe e9 3c e7 ff ff e8 65 53 aa 07 e8 90 b4 93 fd eb 10 e8 89 b4 93 fd eb 09 e8 82 b4 93 fd 90 <0f> 0b 90 4c 8b 64 24 20 44 89 e1 f7 d9 e9 eb f9 ff ff 44 89 f7 48
RSP: 0018:ffffc9000de77c80 EFLAGS: 00010283
RAX: ffffffff8433803e RBX: ffffffffffffffe4 RCX: 0000000000100000
RDX: ffffc9000f4b9000 RSI: 00000000000020b8 RDI: 00000000000020b9
RBP: ffffc9000de77e70 R08: ffff88800029cb00 R09: 0000000000000003
R10: 00000000fffffffb R11: 0000000000000002 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888052295a00 R15: ffffc9000de77d90
FS:  00007f86714146c0(0000) GS:ffff88808c30a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f86713f2fe8 CR3: 0000000039d60000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 btrfs_ioctl_quota_ctl+0x186/0x1f0 fs/btrfs/ioctl.c:3566
 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: 0033:0x7f867059e0d9
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:00007f8671413fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f8670826090 RCX: 00007f867059e0d9
RDX: 00002000000000c0 RSI: 00000000c0109428 RDI: 0000000000000003
RBP: 00007f8670635024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8670826128 R14: 00007f8670826090 R15: 00007ffd6c070158
 </TASK>