general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 PID: 1404 Comm: syz.8.283 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:__d_entry_type include/linux/dcache.h:400 [inline]
RIP: 0010:d_is_miss include/linux/dcache.h:405 [inline]
RIP: 0010:d_is_negative include/linux/dcache.h:451 [inline]
RIP: 0010:d_is_positive include/linux/dcache.h:461 [inline]
RIP: 0010:filename_create+0x209/0x680 fs/namei.c:3621
Code: 30 48 89 44 24 18 72 11 e8 c4 a2 ba ff 49 bd 00 00 00 00 00 fc ff df eb 5f 48 89 c2 48 c1 ea 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 14 0a 84 d2 0f 85 e1 03 00 00 8b 18 89 de 81 e6 00 00 70 00
RSP: 0018:ffffc90000c27da0 EFLAGS: 00010246
RAX: 0000000000000003 RBX: 0000000000000600 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 00000000000001f3 RDI: 00000000000001f4
RBP: ffffc90000c27ea0 R08: ffff88811ca6005f R09: 1ffff1102394c00b
R10: dffffc0000000000 R11: ffffed102394c00c R12: ffff888119e74400
R13: 0000000000000002 R14: ffff888119e74400 R15: ffffc90000c27ec8
FS:  00007f1ba493c6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b34e18ff8 CR3: 0000000119d18000 CR4: 00000000003526a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 user_path_create fs/namei.c:3673 [inline]
 do_mkdirat+0x5e/0x340 fs/namei.c:3813
 __do_sys_mkdirat fs/namei.c:3831 [inline]
 __se_sys_mkdirat fs/namei.c:3829 [inline]
 __x64_sys_mkdirat+0x7b/0x90 fs/namei.c:3829
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f1ba5f02629
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:00007f1ba493c028 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f1ba617c090 RCX: 00007f1ba5f02629
RDX: 0000000000000062 RSI: 0000200000000900 RDI: ffffffffffffff9c
RBP: 00007f1ba5f98b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1ba617c128 R14: 00007f1ba617c090 R15: 00007ffe731bffa8
Modules linked in:

---[ end trace bb119c9e8b7d15c8 ]---
RIP: 0010:__d_entry_type include/linux/dcache.h:400 [inline]
RIP: 0010:d_is_miss include/linux/dcache.h:405 [inline]
RIP: 0010:d_is_negative include/linux/dcache.h:451 [inline]
RIP: 0010:d_is_positive include/linux/dcache.h:461 [inline]
RIP: 0010:filename_create+0x209/0x680 fs/namei.c:3621
Code: 30 48 89 44 24 18 72 11 e8 c4 a2 ba ff 49 bd 00 00 00 00 00 fc ff df eb 5f 48 89 c2 48 c1 ea 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 14 0a 84 d2 0f 85 e1 03 00 00 8b 18 89 de 81 e6 00 00 70 00
RSP: 0018:ffffc90000c27da0 EFLAGS: 00010246
RAX: 0000000000000003 RBX: 0000000000000600 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 00000000000001f3 RDI: 00000000000001f4
RBP: ffffc90000c27ea0 R08: ffff88811ca6005f R09: 1ffff1102394c00b
R10: dffffc0000000000 R11: ffffed102394c00c R12: ffff888119e74400
R13: 0000000000000002 R14: ffff888119e74400 R15: ffffc90000c27ec8
FS:  00007f1ba493c6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b34e18ff8 CR3: 0000000119d18000 CR4: 00000000003526a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	30 48 89             	xor    %cl,-0x77(%rax)
   3:	44 24 18             	rex.R and $0x18,%al
   6:	72 11                	jb     0x19
   8:	e8 c4 a2 ba ff       	call   0xffbaa2d1
   d:	49 bd 00 00 00 00 00 	movabs $0xdffffc0000000000,%r13
  14:	fc ff df
  17:	eb 5f                	jmp    0x78
  19:	48 89 c2             	mov    %rax,%rdx
  1c:	48 c1 ea 03          	shr    $0x3,%rdx
  20:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
  27:	fc ff df
* 2a:	0f b6 14 0a          	movzbl (%rdx,%rcx,1),%edx <-- trapping instruction
  2e:	84 d2                	test   %dl,%dl
  30:	0f 85 e1 03 00 00    	jne    0x417
  36:	8b 18                	mov    (%rax),%ebx
  38:	89 de                	mov    %ebx,%esi
  3a:	81 e6 00 00 70 00    	and    $0x700000,%esi