syzbot

------------[ cut here ]------------
kernel BUG at fs/bcachefs/quota.c:319!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5314 Comm: syz.0.0 Not tainted 6.15.0-rc5-syzkaller-00043-gd76bb1ebb558 #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
RIP: 0010:__bch2_quota_transfer fs/bcachefs/quota.c:319 [inline]
RIP: 0010:bch2_quota_transfer+0xa29/0xa50 fs/bcachefs/quota.c:367
Code: ff ff 89 f9 80 e1 07 38 c1 0f 8c 72 f7 ff ff 48 89 d3 e8 3a f2 dd fd 48 89 da e9 62 f7 ff ff e8 3d 54 12 07 e8 28 fe 7b fd 90 <0f> 0b e8 20 fe 7b fd 90 0f 0b e8 18 fe 7b fd 90 0f 0b e8 10 fe 7b
RSP: 0018:ffffc9000e5ef720 EFLAGS: 00010293
RAX: ffffffff8443d228 RBX: 0000000000000000 RCX: ffff88801f8da440
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000e5ef8d0 R08: 0000000000000001 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff1efdb2f R12: 0000000000000001
R13: ffff888037906c28 R14: 1ffff1100ac300a8 R15: dffffc0000000000
FS:  00007f8cb59736c0(0000) GS:ffff88808d6cb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8cb5972fc8 CR3: 0000000042d6b000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bch2_fs_quota_transfer+0x27d/0x4f0 fs/bcachefs/fs.c:179
 bch2_setattr_nonsize+0x3a6/0x10e0 fs/bcachefs/fs.c:1126
 notify_change+0xb33/0xe40 fs/attr.c:552
 chown_common+0x3f9/0x5a0 fs/open.c:782
 vfs_fchown fs/open.c:850 [inline]
 ksys_fchown+0xea/0x160 fs/open.c:862
 __do_sys_fchown fs/open.c:867 [inline]
 __se_sys_fchown fs/open.c:865 [inline]
 __x64_sys_fchown+0x7a/0x90 fs/open.c:865
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8cb4b8e969
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8cb5973038 EFLAGS: 00000246 ORIG_RAX: 000000000000005d
RAX: ffffffffffffffda RBX: 00007f8cb4db6080 RCX: 00007f8cb4b8e969
RDX: 000000000000000a RSI: 000000003a736e6f RDI: 0000000000000006
RBP: 00007f8cb4c10ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f8cb4db6080 R15: 00007ffc1efc2a68
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__bch2_quota_transfer fs/bcachefs/quota.c:319 [inline]
RIP: 0010:bch2_quota_transfer+0xa29/0xa50 fs/bcachefs/quota.c:367
Code: ff ff 89 f9 80 e1 07 38 c1 0f 8c 72 f7 ff ff 48 89 d3 e8 3a f2 dd fd 48 89 da e9 62 f7 ff ff e8 3d 54 12 07 e8 28 fe 7b fd 90 <0f> 0b e8 20 fe 7b fd 90 0f 0b e8 18 fe 7b fd 90 0f 0b e8 10 fe 7b
RSP: 0018:ffffc9000e5ef720 EFLAGS: 00010293
RAX: ffffffff8443d228 RBX: 0000000000000000 RCX: ffff88801f8da440
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000e5ef8d0 R08: 0000000000000001 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff1efdb2f R12: 0000000000000001
R13: ffff888037906c28 R14: 1ffff1100ac300a8 R15: dffffc0000000000
FS:  00007f8cb59736c0(0000) GS:ffff88808d6cb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc1efc1ec0 CR3: 0000000042d6b000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400