general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 1 PID: 7949 Comm: syz.1.1962 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
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:atomic_open fs/namei.c:3138 [inline]
RIP: 0010:lookup_open fs/namei.c:3227 [inline]
RIP: 0010:open_last_lookups fs/namei.c:3325 [inline]
RIP: 0010:path_openat+0x175f/0x31c0 fs/namei.c:3514
Code: f7 6e 02 00 49 63 de 4c 8b 74 24 48 e9 78 fb ff ff e8 05 c6 ba ff 44 8b 6c 24 14 44 8b a4 24 88 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 9b 09 00 00 44 8b 33 be 00 00 70 00 44
RSP: 0018:ffffc900010cf9a0 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000000000000008 RCX: 0000000000080000
RDX: ffffc900029ab000 RSI: 00000000000001c4 RDI: 00000000000001c5
RBP: ffffc900010cfbb0 R08: ffff8881106be16f R09: 1ffff110220d7c2d
R10: dffffc0000000000 R11: ffffed10220d7c2e R12: 0000000000000000
R13: 0000000000000000 R14: ffff888136488798 R15: dffffc0000000000
FS:  00007f7e94f9b6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7e94f9aff8 CR3: 0000000122d11000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_filp_open+0x1e2/0x410 fs/namei.c:3544
 do_sys_openat2+0x19f/0x750 fs/open.c:1219
 do_sys_open fs/open.c:1235 [inline]
 __do_sys_openat fs/open.c:1251 [inline]
 __se_sys_openat fs/open.c:1246 [inline]
 __x64_sys_openat+0x136/0x160 fs/open.c:1246
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f7e96561629
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:00007f7e94f9b028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f7e967db090 RCX: 00007f7e96561629
RDX: 0000000000000000 RSI: 0000200000000040 RDI: ffffffffffffff9c
RBP: 00007f7e965f7b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7e967db128 R14: 00007f7e967db090 R15: 00007fff59a5b8d8
Modules linked in:
---[ end trace 8929b33a4e02461d ]---
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:atomic_open fs/namei.c:3138 [inline]
RIP: 0010:lookup_open fs/namei.c:3227 [inline]
RIP: 0010:open_last_lookups fs/namei.c:3325 [inline]
RIP: 0010:path_openat+0x175f/0x31c0 fs/namei.c:3514
Code: f7 6e 02 00 49 63 de 4c 8b 74 24 48 e9 78 fb ff ff e8 05 c6 ba ff 44 8b 6c 24 14 44 8b a4 24 88 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 9b 09 00 00 44 8b 33 be 00 00 70 00 44
RSP: 0018:ffffc900010cf9a0 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000000000000008 RCX: 0000000000080000
RDX: ffffc900029ab000 RSI: 00000000000001c4 RDI: 00000000000001c5
RBP: ffffc900010cfbb0 R08: ffff8881106be16f R09: 1ffff110220d7c2d
R10: dffffc0000000000 R11: ffffed10220d7c2e R12: 0000000000000000
R13: 0000000000000000 R14: ffff888136488798 R15: dffffc0000000000
FS:  00007f7e94f9b6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000001a000 CR3: 0000000122d11000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	f7 6e 02             	imull  0x2(%rsi)
   3:	00 49 63             	add    %cl,0x63(%rcx)
   6:	de 4c 8b 74          	fimuls 0x74(%rbx,%rcx,4)
   a:	24 48                	and    $0x48,%al
   c:	e9 78 fb ff ff       	jmp    0xfffffb89
  11:	e8 05 c6 ba ff       	call   0xffbac61b
  16:	44 8b 6c 24 14       	mov    0x14(%rsp),%r13d
  1b:	44 8b a4 24 88 00 00 	mov    0x88(%rsp),%r12d
  22:	00
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 0f b6 04 38       	movzbl (%rax,%r15,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 9b 09 00 00    	jne    0x9d2
  37:	44 8b 33             	mov    (%rbx),%r14d
  3a:	be 00 00 70 00       	mov    $0x700000,%esi
  3f:	44                   	rex.R