general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 0 PID: 2369 Comm: syz.5.487 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/15/2026
RIP: 0010:__d_entry_type include/linux/dcache.h:404 [inline]
RIP: 0010:d_is_miss include/linux/dcache.h:409 [inline]
RIP: 0010:d_is_negative include/linux/dcache.h:455 [inline]
RIP: 0010:d_is_positive include/linux/dcache.h:465 [inline]
RIP: 0010:filename_create+0x256/0x440 fs/namei.c:3850
Code: 33 45 09 fe 48 8d 7c 24 60 44 89 f2 e8 c3 74 ff ff 48 3d 01 f0 ff ff 49 89 c7 72 07 e8 83 af b5 ff eb 62 48 89 c1 48 c1 e9 03 <42> 0f b6 0c 21 84 c9 0f 85 bc 01 00 00 be 00 00 70 00 23 30 41 0f
RSP: 0018:ffffc90000b47d60 EFLAGS: 00010202
RAX: 0000000000000009 RBX: ffffc90000b47e90 RCX: 0000000000000001
RDX: ffffc9000902c000 RSI: 000000000000017c RDI: 000000000000017d
RBP: ffffc90000b47e30 R08: ffff888129bad49f R09: 1ffff11025375a93
R10: dffffc0000000000 R11: ffffed1025375a94 R12: dffffc0000000000
R13: 1ffff92000168fd2 R14: 0000000000000600 R15: 0000000000000009
FS:  00007f7721fa86c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000024000 CR3: 000000010fd7c000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_mknodat+0xdb/0x790 fs/namei.c:3989
 __do_sys_mknodat fs/namei.c:4030 [inline]
 __se_sys_mknodat fs/namei.c:4027 [inline]
 __x64_sys_mknodat+0xa9/0xc0 fs/namei.c:4027
 x64_sys_call+0x194/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:260
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f7723550b19
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:00007f7721fa8028 EFLAGS: 00000246 ORIG_RAX: 0000000000000103
RAX: ffffffffffffffda RBX: 00007f77237d6fa0 RCX: 00007f7723550b19
RDX: 000000000000c000 RSI: 00002000000226c0 RDI: ffffffffffffff9c
RBP: 00007f77235e8b70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000103 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f77237d7038 R14: 00007f77237d6fa0 R15: 00007fffcf1e06c8
 </TASK>
Modules linked in:
---[ end trace 5a7a12a1b718339d ]---
RIP: 0010:__d_entry_type include/linux/dcache.h:404 [inline]
RIP: 0010:d_is_miss include/linux/dcache.h:409 [inline]
RIP: 0010:d_is_negative include/linux/dcache.h:455 [inline]
RIP: 0010:d_is_positive include/linux/dcache.h:465 [inline]
RIP: 0010:filename_create+0x256/0x440 fs/namei.c:3850
Code: 33 45 09 fe 48 8d 7c 24 60 44 89 f2 e8 c3 74 ff ff 48 3d 01 f0 ff ff 49 89 c7 72 07 e8 83 af b5 ff eb 62 48 89 c1 48 c1 e9 03 <42> 0f b6 0c 21 84 c9 0f 85 bc 01 00 00 be 00 00 70 00 23 30 41 0f
RSP: 0018:ffffc90000b47d60 EFLAGS: 00010202
RAX: 0000000000000009 RBX: ffffc90000b47e90 RCX: 0000000000000001
RDX: ffffc9000902c000 RSI: 000000000000017c RDI: 000000000000017d
RBP: ffffc90000b47e30 R08: ffff888129bad49f R09: 1ffff11025375a93
R10: dffffc0000000000 R11: ffffed1025375a94 R12: dffffc0000000000
R13: 1ffff92000168fd2 R14: 0000000000000600 R15: 0000000000000009
FS:  00007f7721fa86c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055556300a908 CR3: 000000010fd7c000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000008000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	45 09 fe             	or     %r15d,%r14d
   3:	48 8d 7c 24 60       	lea    0x60(%rsp),%rdi
   8:	44 89 f2             	mov    %r14d,%edx
   b:	e8 c3 74 ff ff       	call   0xffff74d3
  10:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax
  16:	49 89 c7             	mov    %rax,%r15
  19:	72 07                	jb     0x22
  1b:	e8 83 af b5 ff       	call   0xffb5afa3
  20:	eb 62                	jmp    0x84
  22:	48 89 c1             	mov    %rax,%rcx
  25:	48 c1 e9 03          	shr    $0x3,%rcx
* 29:	42 0f b6 0c 21       	movzbl (%rcx,%r12,1),%ecx <-- trapping instruction
  2e:	84 c9                	test   %cl,%cl
  30:	0f 85 bc 01 00 00    	jne    0x1f2
  36:	be 00 00 70 00       	mov    $0x700000,%esi
  3b:	23 30                	and    (%rax),%esi
  3d:	41                   	rex.B
  3e:	0f                   	.byte 0xf