general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 1 PID: 1824 Comm: syz.0.318 Not tainted 5.10.222-syzkaller-01494-gfd58936f3c1f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:d_really_is_positive include/linux/dcache.h:499 [inline]
RIP: 0010:fuse_atomic_open+0x27f/0x34e0 fs/fuse/dir.c:853
Code: e0 40 4c 8b 64 24 20 75 07 e8 ed 80 6c ff eb 37 48 8b 44 24 60 48 8d 58 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 93 18 aa ff 48 83 3b 00 0f 84 a9 00
RSP: 0018:ffffc90000e97300 EFLAGS: 00010206
RAX: 0000000000000006 RBX: 0000000000000033 RCX: dffffc0000000000
RDX: ffff88810aaccf00 RSI: 0000000000000040 RDI: 0000000000000000
RBP: ffffc90000e97930 R08: ffffffff81fe2802 R09: ffffed10256974ec
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88812b4ba428
R13: ffff888118763000 R14: 1ffff920001d2e78 R15: 0000000000000003
FS:  00007f22c53336c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020347000 CR3: 000000010f460000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 atomic_open fs/namei.c:3114 [inline]
 lookup_open fs/namei.c:3219 [inline]
 open_last_lookups fs/namei.c:3317 [inline]
 path_openat+0xff0/0x3000 fs/namei.c:3506
 do_filp_open+0x21c/0x460 fs/namei.c:3536
 do_sys_openat2+0x13f/0x710 fs/open.c:1217
 do_sys_open fs/open.c:1233 [inline]
 __do_sys_openat fs/open.c:1249 [inline]
 __se_sys_openat fs/open.c:1244 [inline]
 __x64_sys_openat+0x243/0x290 fs/open.c:1244
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f22c66f59f9
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:00007f22c5333048 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f22c6884130 RCX: 00007f22c66f59f9
RDX: 0000000000080041 RSI: 00000000200006c0 RDI: ffffffffffffff9c
RBP: 00007f22c67638ee R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f22c6884130 R15: 00007ffde03bbf68
Modules linked in:
---[ end trace c45cdc110ee580ff ]---
RIP: 0010:d_really_is_positive include/linux/dcache.h:499 [inline]
RIP: 0010:fuse_atomic_open+0x27f/0x34e0 fs/fuse/dir.c:853
Code: e0 40 4c 8b 64 24 20 75 07 e8 ed 80 6c ff eb 37 48 8b 44 24 60 48 8d 58 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 93 18 aa ff 48 83 3b 00 0f 84 a9 00
RSP: 0018:ffffc90000e97300 EFLAGS: 00010206
RAX: 0000000000000006 RBX: 0000000000000033 RCX: dffffc0000000000
RDX: ffff88810aaccf00 RSI: 0000000000000040 RDI: 0000000000000000
RBP: ffffc90000e97930 R08: ffffffff81fe2802 R09: ffffed10256974ec
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88812b4ba428
R13: ffff888118763000 R14: 1ffff920001d2e78 R15: 0000000000000003
FS:  00007f22c53336c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efe43c70ab8 CR3: 000000010f460000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	e0 40                	loopne 0x42
   2:	4c 8b 64 24 20       	mov    0x20(%rsp),%r12
   7:	75 07                	jne    0x10
   9:	e8 ed 80 6c ff       	call   0xff6c80fb
   e:	eb 37                	jmp    0x47
  10:	48 8b 44 24 60       	mov    0x60(%rsp),%rax
  15:	48 8d 58 30          	lea    0x30(%rax),%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 93 18 aa ff       	call   0xffaa18cb
  38:	48 83 3b 00          	cmpq   $0x0,(%rbx)
  3c:	0f                   	.byte 0xf
  3d:	84                   	.byte 0x84
  3e:	a9                   	.byte 0xa9