syzbot

general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 0 PID: 308 Comm: syz-executor797 Not tainted 5.10.225-syzkaller-00513-g8d23314f588a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:do_rmdir+0x28e/0x5c0 fs/namei.c:3905
Code: e8 87 94 b6 ff 45 89 e5 48 bb 00 00 00 00 00 fc ff df eb 7c 49 8d 5c 24 30 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 54 2e f4 ff 48 83 3b 00 74 32 e8 49
RSP: 0018:ffffc90000b27de0 EFLAGS: 00010207
RAX: 0000000000000006 RBX: 0000000000000036 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000000
RBP: ffffc90000b27f18 R08: ffffffff81b68a38 R09: ffffed1023a61e2e
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000006
R13: ffff88811d30f140 R14: 1ffff11023a61e28 R15: ffffc90000b27e01
FS:  00007f9b827396c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005583b68c1118 CR3: 000000011a042000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __do_sys_rmdir fs/namei.c:3930 [inline]
 __se_sys_rmdir fs/namei.c:3928 [inline]
 __x64_sys_rmdir+0x49/0x50 fs/namei.c:3928
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f9b8279c6a9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9b82739168 EFLAGS: 00000246 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 00007f9b828263f8 RCX: 00007f9b8279c6a9
RDX: 00007f9b82776fa6 RSI: 6b6d43be9854b1aa RDI: 0000000020000200
RBP: 00007f9b828263f0 R08: 00007ffc94e4f137 R09: 00007f9b828263f8
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9b828263fc
R13: 000000000000006e R14: 00007ffc94e4f050 R15: 00007ffc94e4f138
Modules linked in:
---[ end trace b07fac7764642bd3 ]---
RIP: 0010:do_rmdir+0x28e/0x5c0 fs/namei.c:3905
Code: e8 87 94 b6 ff 45 89 e5 48 bb 00 00 00 00 00 fc ff df eb 7c 49 8d 5c 24 30 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 54 2e f4 ff 48 83 3b 00 74 32 e8 49
RSP: 0018:ffffc90000b27de0 EFLAGS: 00010207
RAX: 0000000000000006 RBX: 0000000000000036 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000000
RBP: ffffc90000b27f18 R08: ffffffff81b68a38 R09: ffffed1023a61e2e
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000006
R13: ffff88811d30f140 R14: 1ffff11023a61e28 R15: ffffc90000b27e01
FS:  00007f9b827396c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005583b68c1118 CR3: 000000011a042000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	e8 87 94 b6 ff       	call   0xffb6948c
   5:	45 89 e5             	mov    %r12d,%r13d
   8:	48 bb 00 00 00 00 00 	movabs $0xdffffc0000000000,%rbx
   f:	fc ff df
  12:	eb 7c                	jmp    0x90
  14:	49 8d 5c 24 30       	lea    0x30(%r12),%rbx
  19:	48 89 d8             	mov    %rbx,%rax
  1c:	48 c1 e8 03          	shr    $0x3,%rax
  20:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
  27:	fc ff df
* 2a:	80 3c 08 00          	cmpb   $0x0,(%rax,%rcx,1) <-- trapping instruction
  2e:	74 08                	je     0x38
  30:	48 89 df             	mov    %rbx,%rdi
  33:	e8 54 2e f4 ff       	call   0xfff42e8c
  38:	48 83 3b 00          	cmpq   $0x0,(%rbx)
  3c:	74 32                	je     0x70
  3e:	e8                   	.byte 0xe8
  3f:	49                   	rex.WB