general protection fault, probably for non-canonical address 0xdffffc0000000092: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000490-0x0000000000000497]
CPU: 0 PID: 5394 Comm: syz-executor.0 Not tainted 6.1.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:ovl_dentry_upper+0x40/0x60
Code: fe 49 83 c6 68 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 0f 59 ee fe bb 90 04 00 00 49 03 1e 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 f1 58 ee fe 48 8b 03 5b 41 5e 41
RSP: 0018:ffffc90004c5fa40 EFLAGS: 00010202
RAX: 0000000000000092 RBX: 0000000000000490 RCX: ffff888067963a80
RDX: 0000000000000000 RSI: 0000000000000040 RDI: ffff88806841d608
RBP: ffffffff8b02e000 R08: ffffffff81ed31d3 R09: ffffed100d083ad0
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000040
R13: dffffc0000000000 R14: ffff88806841d670 R15: dffffc0000000000
FS:  00007fa16abc26c0(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa16aba1d58 CR3: 0000000012fec000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ovl_dentry_revalidate+0x4c/0x340
 lookup_fast+0x273/0x490
 walk_component+0x57/0x400
 path_lookupat+0x16f/0x450
 filename_lookup+0x278/0x650
 user_path_at_empty+0x40/0x180
 __se_sys_name_to_handle_at+0xf8/0x610
 do_syscall_64+0x3d/0xb0
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fa169e7be39
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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa16abc20c8 EFLAGS: 00000246 ORIG_RAX: 000000000000012f
RAX: ffffffffffffffda RBX: 00007fa169f9bf80 RCX: 00007fa169e7be39
RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003
RBP: 00007fa169ed8ad0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fa169f9bf80 R15: 00007ffe37883168
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ovl_dentry_upper+0x40/0x60
Code: fe 49 83 c6 68 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 0f 59 ee fe bb 90 04 00 00 49 03 1e 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 f1 58 ee fe 48 8b 03 5b 41 5e 41
RSP: 0018:ffffc90004c5fa40 EFLAGS: 00010202
RAX: 0000000000000092 RBX: 0000000000000490 RCX: ffff888067963a80
RDX: 0000000000000000 RSI: 0000000000000040 RDI: ffff88806841d608
RBP: ffffffff8b02e000 R08: ffffffff81ed31d3 R09: ffffed100d083ad0
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000040
R13: dffffc0000000000 R14: ffff88806841d670 R15: dffffc0000000000
FS:  00007fa16abc26c0(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffbe787d18 CR3: 0000000012fec000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	49 83 c6 68          	add    $0x68,%r14
   4:	4c 89 f0             	mov    %r14,%rax
   7:	48 c1 e8 03          	shr    $0x3,%rax
   b:	42 80 3c 38 00       	cmpb   $0x0,(%rax,%r15,1)
  10:	74 08                	je     0x1a
  12:	4c 89 f7             	mov    %r14,%rdi
  15:	e8 0f 59 ee fe       	call   0xfeee5929
  1a:	bb 90 04 00 00       	mov    $0x490,%ebx
  1f:	49 03 1e             	add    (%r14),%rbx
  22:	48 89 d8             	mov    %rbx,%rax
  25:	48 c1 e8 03          	shr    $0x3,%rax
* 29:	42 80 3c 38 00       	cmpb   $0x0,(%rax,%r15,1) <-- trapping instruction
  2e:	74 08                	je     0x38
  30:	48 89 df             	mov    %rbx,%rdi
  33:	e8 f1 58 ee fe       	call   0xfeee5929
  38:	48 8b 03             	mov    (%rbx),%rax
  3b:	5b                   	pop    %rbx
  3c:	41 5e                	pop    %r14
  3e:	41                   	rex.B
