Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 0 UID: 0 PID: 4727 Comm: udevd Not tainted 6.14.0-rc1-syzkaller-00235-g9946eaf552b1 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:kernfs_root fs/kernfs/kernfs-internal.h:70 [inline]
RIP: 0010:kernfs_dop_revalidate+0x8e/0x560 fs/kernfs/dir.c:1159
Code: c5 80 04 00 00 48 89 e8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 ef e8 11 b1 c2 ff 4c 8b 7d 00 4d 8d 67 30 4c 89 e3 48 c1 eb 03 <42> 80 3c 33 00 74 08 4c 89 e7 e8 f3 b0 c2 ff 49 8b 6f 30 48 85 ed
RSP: 0018:ffffc9000222f798 EFLAGS: 00010206
RAX: 1ffff1100896f1d2 RBX: 0000000000000006 RCX: ffff8880407fc880
RDX: ffff8880407fc880 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff888044b78e90 R08: ffffffff82634758 R09: 1ffffffff2036b8e
R10: dffffc0000000000 R11: ffffffff82634730 R12: 0000000000000030
R13: ffff88804334ca48 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007ff542291280(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005622c3bc0168 CR3: 00000000126fa000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 lookup_fast+0x237/0x590
 walk_component fs/namei.c:2110 [inline]
 link_path_walk+0x672/0xea0 fs/namei.c:2479
 path_openat+0x266/0x3590 fs/namei.c:3985
 do_filp_open+0x27f/0x4e0 fs/namei.c:4016
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1428
 do_sys_open fs/open.c:1443 [inline]
 __do_sys_openat fs/open.c:1459 [inline]
 __se_sys_openat fs/open.c:1454 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1454
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff541f169a4
Code: 24 20 48 8d 44 24 30 48 89 44 24 28 64 8b 04 25 18 00 00 00 85 c0 75 2c 44 89 e2 48 89 ee bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 76 60 48 8b 15 55 a4 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007fff6f4fdf40 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 00007ff541f169a4
RDX: 0000000000080000 RSI: 00007fff6f4fe078 RDI: 00000000ffffff9c
RBP: 00007fff6f4fe078 R08: 0000000000000008 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000080000
R13: 00005651b12efb42 R14: 0000000000000001 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:kernfs_root fs/kernfs/kernfs-internal.h:70 [inline]
RIP: 0010:kernfs_dop_revalidate+0x8e/0x560 fs/kernfs/dir.c:1159
Code: c5 80 04 00 00 48 89 e8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 ef e8 11 b1 c2 ff 4c 8b 7d 00 4d 8d 67 30 4c 89 e3 48 c1 eb 03 <42> 80 3c 33 00 74 08 4c 89 e7 e8 f3 b0 c2 ff 49 8b 6f 30 48 85 ed
RSP: 0018:ffffc9000222f798 EFLAGS: 00010206
RAX: 1ffff1100896f1d2 RBX: 0000000000000006 RCX: ffff8880407fc880
RDX: ffff8880407fc880 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff888044b78e90 R08: ffffffff82634758 R09: 1ffffffff2036b8e
R10: dffffc0000000000 R11: ffffffff82634730 R12: 0000000000000030
R13: ffff88804334ca48 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007ff542291280(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005622c3bc0168 CR3: 00000000126fa000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	80 04 00 00          	addb   $0x0,(%rax,%rax,1)
   4:	48 89 e8             	mov    %rbp,%rax
   7:	48 c1 e8 03          	shr    $0x3,%rax
   b:	42 80 3c 30 00       	cmpb   $0x0,(%rax,%r14,1)
  10:	74 08                	je     0x1a
  12:	48 89 ef             	mov    %rbp,%rdi
  15:	e8 11 b1 c2 ff       	call   0xffc2b12b
  1a:	4c 8b 7d 00          	mov    0x0(%rbp),%r15
  1e:	4d 8d 67 30          	lea    0x30(%r15),%r12
  22:	4c 89 e3             	mov    %r12,%rbx
  25:	48 c1 eb 03          	shr    $0x3,%rbx
* 29:	42 80 3c 33 00       	cmpb   $0x0,(%rbx,%r14,1) <-- trapping instruction
  2e:	74 08                	je     0x38
  30:	4c 89 e7             	mov    %r12,%rdi
  33:	e8 f3 b0 c2 ff       	call   0xffc2b12b
  38:	49 8b 6f 30          	mov    0x30(%r15),%rbp
  3c:	48 85 ed             	test   %rbp,%rbp