Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
CPU: 0 UID: 0 PID: 2593 Comm: syz.3.789 Not tainted syzkaller #0 68e3201df5fdad0ba521b4874bccf43aba0ac9cd
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026
RIP: 0010:__d_entry_type include/linux/dcache.h:414 [inline]
RIP: 0010:d_is_miss include/linux/dcache.h:419 [inline]
RIP: 0010:d_is_negative include/linux/dcache.h:465 [inline]
RIP: 0010:d_is_positive include/linux/dcache.h:475 [inline]
RIP: 0010:filename_create+0x25a/0x450 fs/namei.c:4041
Code: 33 45 09 fe 48 8d 7c 24 60 44 89 f2 e8 6f 5f ff ff 48 3d 01 f0 ff ff 49 89 c7 72 07 e8 3f db 98 ff eb 62 48 89 c1 48 c1 e9 03 <42> 0f b6 0c 21 84 c9 0f 85 c1 01 00 00 be 00 00 70 00 23 30 41 0f
RSP: 0018:ffffc9000e45fd40 EFLAGS: 00010202
RAX: 0000000000000010 RBX: ffffc9000e45fe68 RCX: 0000000000000002
RDX: ffffc900032e8000 RSI: 000000000000019a RDI: 000000000000019b
RBP: ffffc9000e45fe10 R08: ffff8881f6e50c07 R09: 1ffff1103edca180
R10: dffffc0000000000 R11: ffffed103edca181 R12: dffffc0000000000
R13: 1ffff92001c8bfcd R14: 0000000000000600 R15: 0000000000000010
FS:  00007f9c189ea6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2e60b1 CR3: 00000001156be000 CR4: 00000000003526b0
DR0: 000000000000000c DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_mkdirat+0xa9/0x530 fs/namei.c:4280
 __do_sys_mkdirat fs/namei.c:4303 [inline]
 __se_sys_mkdirat fs/namei.c:4301 [inline]
 __x64_sys_mkdirat+0x8b/0xa0 fs/namei.c:4301
 x64_sys_call+0x2ba8/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:259
 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: 0033:0x7f9c17b9de99
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:00007f9c189ea028 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f9c17e26090 RCX: 00007f9c17b9de99
RDX: 0000000000000062 RSI: 0000200000000900 RDI: ffffffffffffff9c
RBP: 00007f9c17c33eaf R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9c17e26128 R14: 00007f9c17e26090 R15: 00007ffc24a47988
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__d_entry_type include/linux/dcache.h:414 [inline]
RIP: 0010:d_is_miss include/linux/dcache.h:419 [inline]
RIP: 0010:d_is_negative include/linux/dcache.h:465 [inline]
RIP: 0010:d_is_positive include/linux/dcache.h:475 [inline]
RIP: 0010:filename_create+0x25a/0x450 fs/namei.c:4041
Code: 33 45 09 fe 48 8d 7c 24 60 44 89 f2 e8 6f 5f ff ff 48 3d 01 f0 ff ff 49 89 c7 72 07 e8 3f db 98 ff eb 62 48 89 c1 48 c1 e9 03 <42> 0f b6 0c 21 84 c9 0f 85 c1 01 00 00 be 00 00 70 00 23 30 41 0f
RSP: 0018:ffffc9000e45fd40 EFLAGS: 00010202
RAX: 0000000000000010 RBX: ffffc9000e45fe68 RCX: 0000000000000002
RDX: ffffc900032e8000 RSI: 000000000000019a RDI: 000000000000019b
RBP: ffffc9000e45fe10 R08: ffff8881f6e50c07 R09: 1ffff1103edca180
R10: dffffc0000000000 R11: ffffed103edca181 R12: dffffc0000000000
R13: 1ffff92001c8bfcd R14: 0000000000000600 R15: 0000000000000010
FS:  00007f9c189ea6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd29c7f7e9c CR3: 00000001156be000 CR4: 00000000003526b0
DR0: 000000000000000c DR1: 0000000000000000 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 6f 5f ff ff       	call   0xffff5f7f
  10:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax
  16:	49 89 c7             	mov    %rax,%r15
  19:	72 07                	jb     0x22
  1b:	e8 3f db 98 ff       	call   0xff98db5f
  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 c1 01 00 00    	jne    0x1f7
  36:	be 00 00 70 00       	mov    $0x700000,%esi
  3b:	23 30                	and    (%rax),%esi
  3d:	41                   	rex.B
  3e:	0f                   	.byte 0xf