------------[ cut here ]------------
kernel BUG at fs/bcachefs/btree_trans_commit.c:348!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5358 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~bpo12+1 04/01/2014
RIP: 0010:btree_insert_entry_checks fs/bcachefs/btree_trans_commit.c:343 [inline]
RIP: 0010:bch2_trans_commit_write_locked fs/bcachefs/btree_trans_commit.c:725 [inline]
RIP: 0010:do_bch2_trans_commit fs/bcachefs/btree_trans_commit.c:854 [inline]
RIP: 0010:__bch2_trans_commit+0x86e5/0x8870 fs/bcachefs/btree_trans_commit.c:1085
Code: 90 fd eb 0c e8 bc a1 90 fd eb 05 e8 b5 a1 90 fd 49 bd 00 00 00 00 00 fc ff df 4c 8b 64 24 48 e9 e1 af ff ff e8 9c a1 90 fd 90 <0f> 0b e8 94 a1 90 fd 90 0f 0b e8 8c a1 90 fd 90 0f 0b e8 84 a1 90
RSP: 0018:ffffc9000fe17540 EFLAGS: 00010287
RAX: ffffffff842f19a4 RBX: ffffffff842edb75 RCX: 0000000000100000
RDX: ffffc9000e53b000 RSI: 00000000000035a2 RDI: 00000000000035a3
RBP: ffffc9000fe17830 R08: 0000000000000000 R09: ffffffff842edb75
R10: dffffc0000000000 R11: ffffed100a5d9309 R12: ffff88805610c020
R13: dffffc0000000000 R14: ffff88805610e4d8 R15: 0000000000000001
FS:  00007f6a5d85c6c0(0000) GS:ffff88808d20f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000006540 CR3: 0000000042e0e000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 bch2_trans_commit fs/bcachefs/btree_update.h:241 [inline]
 bch2_setattr_nonsize+0xcf5/0x10e0 fs/bcachefs/fs.c:1148
 notify_change+0xb36/0xe40 fs/attr.c:552
 vfs_utimes+0x3fb/0x570 fs/utimes.c:66
 do_utimes_path fs/utimes.c:99 [inline]
 do_utimes+0x1bd/0x2a0 fs/utimes.c:140
 __do_sys_utimensat fs/utimes.c:159 [inline]
 __se_sys_utimensat fs/utimes.c:143 [inline]
 __x64_sys_utimensat+0x14f/0x230 fs/utimes.c:143
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6a5c98ebe9
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:00007f6a5d85c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000118
RAX: ffffffffffffffda RBX: 00007f6a5cbb6090 RCX: 00007f6a5c98ebe9
RDX: 0000200000000040 RSI: 0000200000000080 RDI: ffffffffffffff9c
RBP: 00007f6a5ca11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6a5cbb6128 R14: 00007f6a5cbb6090 R15: 00007ffeb0650658
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:btree_insert_entry_checks fs/bcachefs/btree_trans_commit.c:343 [inline]
RIP: 0010:bch2_trans_commit_write_locked fs/bcachefs/btree_trans_commit.c:725 [inline]
RIP: 0010:do_bch2_trans_commit fs/bcachefs/btree_trans_commit.c:854 [inline]
RIP: 0010:__bch2_trans_commit+0x86e5/0x8870 fs/bcachefs/btree_trans_commit.c:1085
Code: 90 fd eb 0c e8 bc a1 90 fd eb 05 e8 b5 a1 90 fd 49 bd 00 00 00 00 00 fc ff df 4c 8b 64 24 48 e9 e1 af ff ff e8 9c a1 90 fd 90 <0f> 0b e8 94 a1 90 fd 90 0f 0b e8 8c a1 90 fd 90 0f 0b e8 84 a1 90
RSP: 0018:ffffc9000fe17540 EFLAGS: 00010287
RAX: ffffffff842f19a4 RBX: ffffffff842edb75 RCX: 0000000000100000
RDX: ffffc9000e53b000 RSI: 00000000000035a2 RDI: 00000000000035a3
RBP: ffffc9000fe17830 R08: 0000000000000000 R09: ffffffff842edb75
R10: dffffc0000000000 R11: ffffed100a5d9309 R12: ffff88805610c020
R13: dffffc0000000000 R14: ffff88805610e4d8 R15: 0000000000000001
FS:  00007f6a5d85c6c0(0000) GS:ffff88808d20f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6a5d83afc8 CR3: 0000000042e0e000 CR4: 0000000000352ef0