general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] CPU: 1 PID: 18465 Comm: syz.0.4275 Tainted: G W 5.10.222-syzkaller-01494-gfd58936f3c1f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 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:3130 [inline] RIP: 0010:lookup_open fs/namei.c:3219 [inline] RIP: 0010:open_last_lookups fs/namei.c:3317 [inline] RIP: 0010:path_openat+0x17ab/0x3000 fs/namei.c:3506 Code: b6 04 30 84 c0 0f 85 d9 07 00 00 48 8b 44 24 30 80 60 01 f8 e9 69 ee ff ff e8 61 e0 b6 ff 4c 8b 64 24 20 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 8f 07 00 00 41 8b 1f be 00 00 70 00 21 RSP: 0018:ffffc90000bb7940 EFLAGS: 00010203 RAX: 0000000000000002 RBX: ffff888115dd2918 RCX: 0000000000040000 RDX: ffffc90003e78000 RSI: 00000000000001d6 RDI: 00000000000001d7 RBP: ffffc90000bb7b70 R08: ffffffff81b68328 R09: ffffed1021f95cfa R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88810fcae7a0 R13: 0000000000008000 R14: dffffc0000000000 R15: 0000000000000017 FS: 00007f7f9ad086c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002100033f CR3: 000000014b0c0000 CR4: 00000000003526a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_filp_open+0x21c/0x460 fs/namei.c:3536 do_sys_openat2+0x13f/0x710 fs/open.c:1217 do_sys_open fs/open.c:1233 [inline] __do_sys_openat fs/open.c:1249 [inline] __se_sys_openat fs/open.c:1244 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1244 do_syscall_64+0x34/0x70 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f7f9c0a9299 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:00007f7f9ad08048 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f7f9c238058 RCX: 00007f7f9c0a9299 RDX: 0000000000000000 RSI: 0000000020000040 RDI: ffffffffffffff9c RBP: 00007f7f9c1168e6 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f7f9c238058 R15: 00007ffde66f5698 Modules linked in: ---[ end trace 24d6b0aeca21f4c2 ]--- 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:3130 [inline] RIP: 0010:lookup_open fs/namei.c:3219 [inline] RIP: 0010:open_last_lookups fs/namei.c:3317 [inline] RIP: 0010:path_openat+0x17ab/0x3000 fs/namei.c:3506 Code: b6 04 30 84 c0 0f 85 d9 07 00 00 48 8b 44 24 30 80 60 01 f8 e9 69 ee ff ff e8 61 e0 b6 ff 4c 8b 64 24 20 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 8f 07 00 00 41 8b 1f be 00 00 70 00 21 RSP: 0018:ffffc90000bb7940 EFLAGS: 00010203 RAX: 0000000000000002 RBX: ffff888115dd2918 RCX: 0000000000040000 RDX: ffffc90003e78000 RSI: 00000000000001d6 RDI: 00000000000001d7 RBP: ffffc90000bb7b70 R08: ffffffff81b68328 R09: ffffed1021f95cfa R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88810fcae7a0 R13: 0000000000008000 R14: dffffc0000000000 R15: 0000000000000017 FS: 00007f7f9ad086c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7f9ace5ff0 CR3: 000000014b0c0000 CR4: 00000000003526b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: b6 04 mov $0x4,%dh 2: 30 84 c0 0f 85 d9 07 xor %al,0x7d9850f(%rax,%rax,8) 9: 00 00 add %al,(%rax) b: 48 8b 44 24 30 mov 0x30(%rsp),%rax 10: 80 60 01 f8 andb $0xf8,0x1(%rax) 14: e9 69 ee ff ff jmp 0xffffee82 19: e8 61 e0 b6 ff call 0xffb6e07f 1e: 4c 8b 64 24 20 mov 0x20(%rsp),%r12 23: 4c 89 f8 mov %r15,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 30 movzbl (%rax,%r14,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 8f 07 00 00 jne 0x7c6 37: 41 8b 1f mov (%r15),%ebx 3a: be 00 00 70 00 mov $0x700000,%esi 3f: 21 .byte 0x21