Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 UID: 0 PID: 4700 Comm: syz.2.1315 Not tainted syzkaller #0 0043dfd2fbaf315da186ee57f2b2b1c8bfff300f
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:__d_entry_type include/linux/dcache.h:415 [inline]
RIP: 0010:d_is_miss include/linux/dcache.h:420 [inline]
RIP: 0010:d_is_negative include/linux/dcache.h:466 [inline]
RIP: 0010:do_unlinkat+0x27e/0x5a0 fs/namei.c:4526
Code: e8 57 66 9b ff 31 db 41 81 ff 00 00 20 00 0f 95 c3 83 c3 eb e9 d7 00 00 00 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 37 02 00 00 41 8b 1e be 00 00 70 00 21 de
RSP: 0018:ffffc9000ca2fe00 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: ffff8881402f0000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000ca2fee0 R08: ffff8881f6f50b87 R09: 1ffff1103edea170
R10: dffffc0000000000 R11: ffffed103edea171 R12: 1ffff11022667828
R13: ffff88811333c140 R14: 0000000000000001 R15: 0000000000000000
FS:  00007f0dbab356c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000a000 CR3: 000000012c30e000 CR4: 00000000003526b0
DR0: 0000000000000006 DR1: 0000000000000003 DR2: 0000000000000401
DR3: 0000000000000404 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __do_sys_unlinkat fs/namei.c:4576 [inline]
 __se_sys_unlinkat fs/namei.c:4569 [inline]
 __x64_sys_unlinkat+0xda/0xf0 fs/namei.c:4569
 x64_sys_call+0x2974/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:264
 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: 0033:0x7f0db9d8ebe9
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:00007f0dbab35038 EFLAGS: 00000246 ORIG_RAX: 0000000000000107
RAX: ffffffffffffffda RBX: 00007f0db9fb5fa0 RCX: 00007f0db9d8ebe9
RDX: 0000000000000000 RSI: 0000200000000040 RDI: ffffffffffffff9c
RBP: 00007f0db9e11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0db9fb6038 R14: 00007f0db9fb5fa0 R15: 00007fff371df838
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__d_entry_type include/linux/dcache.h:415 [inline]
RIP: 0010:d_is_miss include/linux/dcache.h:420 [inline]
RIP: 0010:d_is_negative include/linux/dcache.h:466 [inline]
RIP: 0010:do_unlinkat+0x27e/0x5a0 fs/namei.c:4526
Code: e8 57 66 9b ff 31 db 41 81 ff 00 00 20 00 0f 95 c3 83 c3 eb e9 d7 00 00 00 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 37 02 00 00 41 8b 1e be 00 00 70 00 21 de
RSP: 0018:ffffc9000ca2fe00 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: ffff8881402f0000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000ca2fee0 R08: ffff8881f6f50b87 R09: 1ffff1103edea170
R10: dffffc0000000000 R11: ffffed103edea171 R12: 1ffff11022667828
R13: ffff88811333c140 R14: 0000000000000001 R15: 0000000000000000
FS:  00007f0dbab356c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0db87f6f98 CR3: 000000012c30e000 CR4: 00000000003526b0
DR0: 0000000000000006 DR1: 0000000000000003 DR2: 0000000000000401
DR3: 0000000000000404 DR6: 00000000ffff0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	e8 57 66 9b ff       	call   0xff9b665c
   5:	31 db                	xor    %ebx,%ebx
   7:	41 81 ff 00 00 20 00 	cmp    $0x200000,%r15d
   e:	0f 95 c3             	setne  %bl
  11:	83 c3 eb             	add    $0xffffffeb,%ebx
  14:	e9 d7 00 00 00       	jmp    0xf0
  19:	4c 89 f0             	mov    %r14,%rax
  1c:	48 c1 e8 03          	shr    $0x3,%rax
  20:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
  27:	fc ff df
* 2a:	0f b6 04 08          	movzbl (%rax,%rcx,1),%eax <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	0f 85 37 02 00 00    	jne    0x26d
  36:	41 8b 1e             	mov    (%r14),%ebx
  39:	be 00 00 70 00       	mov    $0x700000,%esi
  3e:	21 de                	and    %ebx,%esi