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: 0 UID: 0 PID: 384 Comm: syz.2.17 Not tainted syzkaller #0 a8cf528afde17777b8d0df17d514b1350887467d
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:atomic_open fs/namei.c:3471 [inline]
RIP: 0010:lookup_open fs/namei.c:3566 [inline]
RIP: 0010:open_last_lookups fs/namei.c:3694 [inline]
RIP: 0010:path_openat+0x154c/0x34b0 fs/namei.c:3930
Code: f3 ff ff ff 44 8b 6c 24 28 4c 89 e7 e8 7d a5 02 00 4c 63 e3 e9 97 f5 ff ff e8 70 c3 9b ff 4c 8b 74 24 38 4c 89 e0 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 54 0e 00 00 41 8b 1c 24 be 00 00 70 00
RSP: 0018:ffffc900007cf920 EFLAGS: 00010202
RAX: 0000000000000001 RBX: ffff88810d3c4b88 RCX: ffff8881151f5f00
RDX: 0000000000000000 RSI: 0000000000000003 RDI: ffff888111b093b0
RBP: ffffc900007cfb30 R08: ffff8881f6e50b87 R09: 1ffff1103edca170
R10: dffffc0000000000 R11: ffffed103edca171 R12: 0000000000000008
R13: 0000000000000000 R14: ffff8881151f67f8 R15: dffffc0000000000
FS:  00007fbf88f8f6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000005fe0 CR3: 00000001153e4000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 do_filp_open+0x1c6/0x3e0 fs/namei.c:3960
 do_sys_openat2+0x12c/0x1c0 fs/open.c:1438
 __do_sys_openat2 fs/open.c:1496 [inline]
 __se_sys_openat2+0x229/0x2c0 fs/open.c:1472
 __x64_sys_openat2+0x9f/0xc0 fs/open.c:1472
 x64_sys_call+0x283c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:438
 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: 0033:0x7fbf8818ebe9
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:00007fbf88f8f038 EFLAGS: 00000246 ORIG_RAX: 00000000000001b5
RAX: ffffffffffffffda RBX: 00007fbf883b5fa0 RCX: 00007fbf8818ebe9
RDX: 0000200000000100 RSI: 0000200000000000 RDI: 00000000ffffff9c
RBP: 00007fbf88211e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000018 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbf883b6038 R14: 00007fbf883b5fa0 R15: 00007ffd0a5d26a8
 </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:atomic_open fs/namei.c:3471 [inline]
RIP: 0010:lookup_open fs/namei.c:3566 [inline]
RIP: 0010:open_last_lookups fs/namei.c:3694 [inline]
RIP: 0010:path_openat+0x154c/0x34b0 fs/namei.c:3930
Code: f3 ff ff ff 44 8b 6c 24 28 4c 89 e7 e8 7d a5 02 00 4c 63 e3 e9 97 f5 ff ff e8 70 c3 9b ff 4c 8b 74 24 38 4c 89 e0 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 54 0e 00 00 41 8b 1c 24 be 00 00 70 00
RSP: 0018:ffffc900007cf920 EFLAGS: 00010202
RAX: 0000000000000001 RBX: ffff88810d3c4b88 RCX: ffff8881151f5f00
RDX: 0000000000000000 RSI: 0000000000000003 RDI: ffff888111b093b0
RBP: ffffc900007cfb30 R08: ffff8881f6e50b87 R09: 1ffff1103edca170
R10: dffffc0000000000 R11: ffffed103edca171 R12: 0000000000000008
R13: 0000000000000000 R14: ffff8881151f67f8 R15: dffffc0000000000
FS:  00007fbf88f8f6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbf88f6df98 CR3: 00000001153e4000 CR4: 00000000003526b0
----------------
Code disassembly (best guess), 3 bytes skipped:
   0:	ff 44 8b 6c          	incl   0x6c(%rbx,%rcx,4)
   4:	24 28                	and    $0x28,%al
   6:	4c 89 e7             	mov    %r12,%rdi
   9:	e8 7d a5 02 00       	call   0x2a58b
   e:	4c 63 e3             	movslq %ebx,%r12
  11:	e9 97 f5 ff ff       	jmp    0xfffff5ad
  16:	e8 70 c3 9b ff       	call   0xff9bc38b
  1b:	4c 8b 74 24 38       	mov    0x38(%rsp),%r14
  20:	4c 89 e0             	mov    %r12,%rax
  23:	48 c1 e8 03          	shr    $0x3,%rax
* 27:	42 0f b6 04 38       	movzbl (%rax,%r15,1),%eax <-- trapping instruction
  2c:	84 c0                	test   %al,%al
  2e:	0f 85 54 0e 00 00    	jne    0xe88
  34:	41 8b 1c 24          	mov    (%r12),%ebx
  38:	be 00 00 70 00       	mov    $0x700000,%esi