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: 4726 Comm: udevd Not tainted 6.14.0-rc4-syzkaller-00282-g1973160c90d7 #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 81 25 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 63 25 c2 ff 49 8b 6f 30 48 85 ed
RSP: 0018:ffffc9000223fa78 EFLAGS: 00010206
RAX: 1ffff11008b21090 RBX: 0000000000000006 RCX: ffff88803f05a440
RDX: ffff88803f05a440 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff888045908480 R08: ffffffff8266d498 R09: 1ffffffff2079dee
R10: dffffc0000000000 R11: ffffffff8266d470 R12: 0000000000000030
R13: ffff88804587b490 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007fdda1bbc280(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055a5732cc028 CR3: 00000000120ba000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 lookup_fast+0x237/0x590
 walk_component+0x57/0x410 fs/namei.c:2110
 lookup_last fs/namei.c:2612 [inline]
 path_lookupat+0x16f/0x450 fs/namei.c:2636
 filename_lookup+0x2a3/0x670 fs/namei.c:2665
 do_readlinkat+0xf0/0x3a0 fs/stat.c:564
 __do_sys_readlink fs/stat.c:601 [inline]
 __se_sys_readlink fs/stat.c:598 [inline]
 __x64_sys_readlink+0x7f/0x90 fs/stat.c:598
 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: 0033:0x7fdda1717d47
Code: 73 01 c3 48 8b 0d e1 90 0d 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 59 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d b1 90 0d 00 f7 d8 64 89 01 48
RSP: 002b:00007ffc09c58518 EFLAGS: 00000246 ORIG_RAX: 0000000000000059
RAX: ffffffffffffffda RBX: 00007ffc09c58528 RCX: 00007fdda1717d47
RDX: 0000000000000400 RSI: 00007ffc09c58528 RDI: 00007ffc09c58a08
RBP: 0000000000000400 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000812 R11: 0000000000000246 R12: 00007ffc09c58a08
R13: 00007ffc09c58978 R14: 0000559c390ea910 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
----------------
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 81 25 c2 ff       	call   0xffc2259b
  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 63 25 c2 ff       	call   0xffc2259b
  38:	49 8b 6f 30          	mov    0x30(%r15),%rbp
  3c:	48 85 ed             	test   %rbp,%rbp