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: 1 UID: 0 PID: 2656 Comm: syz.3.790 Not tainted syzkaller #0 a506770653dd131ce1f6b755c8f096a645f29717
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026
RIP: 0010:traverse_mounts fs/namei.c:1467 [inline]
RIP: 0010:handle_mounts fs/namei.c:1579 [inline]
RIP: 0010:step_into+0x117/0xf10 fs/namei.c:1899
Code: 8d 73 38 c6 44 24 5f 00 43 0f b6 04 3c 84 c0 4d 89 fd 0f 85 f3 0b 00 00 45 8b 36 4c 8b bc 24 88 00 00 00 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 f2 0b 00 00 45 8b 3f 44 89 fe 81 e6 00
RSP: 0018:ffffc9000d2cfa80 EFLAGS: 00010202
RAX: 0000000000000001 RBX: ffffc9000d2cfc80 RCX: 0000000000080000
RDX: ffffc90002685000 RSI: 00000000000001dd RDI: 00000000000001de
RBP: ffffc9000d2cfb78 R08: ffff888132a98e1f R09: 1ffff110265531c3
R10: dffffc0000000000 R11: ffffed10265531c4 R12: 1ffff92001a59f97
R13: dffffc0000000000 R14: 0000000000004000 R15: 0000000000000009
FS:  00007f90138176c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000006dc0 CR3: 0000000116232000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 walk_component+0x253/0x450 fs/namei.c:2067
 lookup_last fs/namei.c:2564 [inline]
 path_lookupat+0x155/0x440 fs/namei.c:2588
 filename_lookup+0x22d/0x5a0 fs/namei.c:2617
 do_readlinkat+0xe7/0x520 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:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f901299de59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9013817028 EFLAGS: 00000246 ORIG_RAX: 0000000000000059
RAX: ffffffffffffffda RBX: 00007f9012c25fa0 RCX: 00007f901299de59
RDX: 0000000000000097 RSI: 00002000000021c0 RDI: 0000200000002000
RBP: 00007f9012a33e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9012c26038 R14: 00007f9012c25fa0 R15: 00007ffcdf4a8ab8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:traverse_mounts fs/namei.c:1467 [inline]
RIP: 0010:handle_mounts fs/namei.c:1579 [inline]
RIP: 0010:step_into+0x117/0xf10 fs/namei.c:1899
Code: 8d 73 38 c6 44 24 5f 00 43 0f b6 04 3c 84 c0 4d 89 fd 0f 85 f3 0b 00 00 45 8b 36 4c 8b bc 24 88 00 00 00 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 f2 0b 00 00 45 8b 3f 44 89 fe 81 e6 00
RSP: 0018:ffffc9000d2cfa80 EFLAGS: 00010202
RAX: 0000000000000001 RBX: ffffc9000d2cfc80 RCX: 0000000000080000
RDX: ffffc90002685000 RSI: 00000000000001dd RDI: 00000000000001de
RBP: ffffc9000d2cfb78 R08: ffff888132a98e1f R09: 1ffff110265531c3
R10: dffffc0000000000 R11: ffffed10265531c4 R12: 1ffff92001a59f97
R13: dffffc0000000000 R14: 0000000000004000 R15: 0000000000000009
FS:  00007f90138176c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff00d888ff8 CR3: 0000000116232000 CR4: 00000000003526b0
DR0: 000004000002002c DR1: fffeffffff7fff05 DR2: 0000000080000002
DR3: 0000000000000003 DR6: 00000000ffff0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	8d 73 38             	lea    0x38(%rbx),%esi
   3:	c6 44 24 5f 00       	movb   $0x0,0x5f(%rsp)
   8:	43 0f b6 04 3c       	movzbl (%r12,%r15,1),%eax
   d:	84 c0                	test   %al,%al
   f:	4d 89 fd             	mov    %r15,%r13
  12:	0f 85 f3 0b 00 00    	jne    0xc0b
  18:	45 8b 36             	mov    (%r14),%r14d
  1b:	4c 8b bc 24 88 00 00 	mov    0x88(%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 f2 0b 00 00    	jne    0xc29
  37:	45 8b 3f             	mov    (%r15),%r15d
  3a:	44 89 fe             	mov    %r15d,%esi
  3d:	81                   	.byte 0x81
  3e:	e6 00                	out    %al,$0x0