Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 0 UID: 0 PID: 558 Comm: syz.2.65 Not tainted syzkaller #0 0043dfd2fbaf315da186ee57f2b2b1c8bfff300f
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:traverse_mounts fs/namei.c:1459 [inline]
RIP: 0010:handle_mounts fs/namei.c:1571 [inline]
RIP: 0010:step_into+0x121/0xf50 fs/namei.c:1891
Code: 74 24 08 c6 44 24 7f 00 43 0f b6 04 3c 84 c0 4d 89 fd 0f 85 10 0c 00 00 45 8b 36 4c 8b bc 24 a8 00 00 00 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 0f 0c 00 00 45 8b 3f 44 89 fe 81 e6 00
RSP: 0018:ffffc9000e037a40 EFLAGS: 00010203
RAX: 0000000000000001 RBX: ffffc9000e037c80 RCX: 0000000000080000
RDX: ffffc90002274000 RSI: 000000000000018e RDI: 000000000000018f
RBP: ffffc9000e037b58 R08: ffff888110e2ce1f R09: 1ffff110221c59c3
R10: dffffc0000000000 R11: ffffed10221c59c4 R12: 1ffff92001c06f97
R13: dffffc0000000000 R14: 0000000000004000 R15: 000000000000000d
FS:  00007f229747b6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001000 CR3: 00000001175f4000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 walk_component+0x255/0x440 fs/namei.c:2059
 lookup_last fs/namei.c:2556 [inline]
 path_lookupat+0x180/0x4a0 fs/namei.c:2580
 filename_lookup+0x1f5/0x520 fs/namei.c:2609
 do_readlinkat+0xda/0x510 fs/stat.c:537
 __do_sys_readlink fs/stat.c:574 [inline]
 __se_sys_readlink fs/stat.c:571 [inline]
 __x64_sys_readlink+0x83/0xa0 fs/stat.c:571
 x64_sys_call+0x155b/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:90
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f229658ebe9
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:00007f229747b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000059
RAX: ffffffffffffffda RBX: 00007f22967b5fa0 RCX: 00007f229658ebe9
RDX: 0000000000000097 RSI: 00002000000021c0 RDI: 0000200000002000
RBP: 00007f2296611e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f22967b6038 R14: 00007f22967b5fa0 R15: 00007fff0f8357a8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:traverse_mounts fs/namei.c:1459 [inline]
RIP: 0010:handle_mounts fs/namei.c:1571 [inline]
RIP: 0010:step_into+0x121/0xf50 fs/namei.c:1891
Code: 74 24 08 c6 44 24 7f 00 43 0f b6 04 3c 84 c0 4d 89 fd 0f 85 10 0c 00 00 45 8b 36 4c 8b bc 24 a8 00 00 00 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 0f 0c 00 00 45 8b 3f 44 89 fe 81 e6 00
RSP: 0018:ffffc9000e037a40 EFLAGS: 00010203
RAX: 0000000000000001 RBX: ffffc9000e037c80 RCX: 0000000000080000
RDX: ffffc90002274000 RSI: 000000000000018e RDI: 000000000000018f
RBP: ffffc9000e037b58 R08: ffff888110e2ce1f R09: 1ffff110221c59c3
R10: dffffc0000000000 R11: ffffed10221c59c4 R12: 1ffff92001c06f97
R13: dffffc0000000000 R14: 0000000000004000 R15: 000000000000000d
FS:  00007f229747b6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc917b84198 CR3: 00000001175f4000 CR4: 00000000003526b0
----------------
Code disassembly (best guess):
   0:	74 24                	je     0x26
   2:	08 c6                	or     %al,%dh
   4:	44 24 7f             	rex.R and $0x7f,%al
   7:	00 43 0f             	add    %al,0xf(%rbx)
   a:	b6 04                	mov    $0x4,%dh
   c:	3c 84                	cmp    $0x84,%al
   e:	c0 4d 89 fd          	rorb   $0xfd,-0x77(%rbp)
  12:	0f 85 10 0c 00 00    	jne    0xc28
  18:	45 8b 36             	mov    (%r14),%r14d
  1b:	4c 8b bc 24 a8 00 00 	mov    0xa8(%rsp),%r15
  22:	00
  23:	4c 89 f8             	mov    %r15,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 0f b6 04 28       	movzbl (%rax,%r13,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 0f 0c 00 00    	jne    0xc46
  37:	45 8b 3f             	mov    (%r15),%r15d
  3a:	44 89 fe             	mov    %r15d,%esi
  3d:	81                   	.byte 0x81
  3e:	e6 00                	out    %al,$0x0