Oops: general protection fault, probably for non-canonical address 0xdffffc000000000c: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000060-0x0000000000000067]
CPU: 0 UID: 0 PID: 587 Comm: syz.3.7785 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:fib6_nh_get_excptn_bucket net/ipv6/route.c:1662 [inline]
RIP: 0010:rt6_find_cached_rt+0xb9/0x270 net/ipv6/route.c:1860
Code: 48 c1 e8 03 48 89 44 24 08 48 8b 44 24 08 80 3c 18 00 74 08 4c 89 f7 e8 c5 4a 2c f8 49 8b 2e 48 83 c5 60 48 89 e8 48 c1 e8 03 <80> 3c 18 00 74 08 48 89 ef e8 a9 4a 2c f8 4c 8b 6d 00 e8 e0 3b 4d
RSP: 0018:ffffc90003d27620 EFLAGS: 00010206
RAX: 000000000000000c RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff888056e6dac0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000060 R08: ffff88805f4c1533 R09: 1ffff1100be982a6
R10: dffffc0000000000 R11: ffffed100be982a7 R12: ffffc90003d276f8
R13: 0000000000000000 R14: ffffc90003d276f0 R15: 0000000000000000
FS:  00007ff0074296c0(0000) GS:ffff888126138000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000000c0 CR3: 000000005e650000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 ip6_pol_route+0x28d/0x1180 net/ipv6/route.c:2276
 pol_lookup_func include/net/ip6_fib.h:617 [inline]
 fib6_rule_lookup+0x348/0x6f0 net/ipv6/fib6_rules.c:125
 ip6_route_output_flags_noref net/ipv6/route.c:2684 [inline]
 ip6_route_output_flags+0x364/0x5d0 net/ipv6/route.c:2696
 ip6_route_output include/net/ip6_route.h:93 [inline]
 ip6_dst_lookup_tail+0x1ae/0x1510 net/ipv6/ip6_output.c:1141
 ip6_dst_lookup_flow+0x47/0xe0 net/ipv6/ip6_output.c:1272
 ip6_datagram_dst_update+0x75c/0xcb0 net/ipv6/datagram.c:96
 __ip6_datagram_connect+0xbd1/0x1150 net/ipv6/datagram.c:255
 ip6_datagram_connect net/ipv6/datagram.c:279 [inline]
 ip6_datagram_connect_v6_only+0x63/0xa0 net/ipv6/datagram.c:291
 __sys_connect_file net/socket.c:2102 [inline]
 __sys_connect+0x316/0x440 net/socket.c:2121
 __do_sys_connect net/socket.c:2127 [inline]
 __se_sys_connect net/socket.c:2124 [inline]
 __x64_sys_connect+0x7a/0x90 net/socket.c:2124
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff00658f749
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:00007ff007429038 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 00007ff0067e5fa0 RCX: 00007ff00658f749
RDX: 000000000000001c RSI: 0000200000000000 RDI: 0000000000000003
RBP: 00007ff006613f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff0067e6038 R14: 00007ff0067e5fa0 R15: 00007ffd5672c4c8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:fib6_nh_get_excptn_bucket net/ipv6/route.c:1662 [inline]
RIP: 0010:rt6_find_cached_rt+0xb9/0x270 net/ipv6/route.c:1860
Code: 48 c1 e8 03 48 89 44 24 08 48 8b 44 24 08 80 3c 18 00 74 08 4c 89 f7 e8 c5 4a 2c f8 49 8b 2e 48 83 c5 60 48 89 e8 48 c1 e8 03 <80> 3c 18 00 74 08 48 89 ef e8 a9 4a 2c f8 4c 8b 6d 00 e8 e0 3b 4d
RSP: 0018:ffffc90003d27620 EFLAGS: 00010206
RAX: 000000000000000c RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff888056e6dac0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000060 R08: ffff88805f4c1533 R09: 1ffff1100be982a6
R10: dffffc0000000000 R11: ffffed100be982a7 R12: ffffc90003d276f8
R13: 0000000000000000 R14: ffffc90003d276f0 R15: 0000000000000000
FS:  00007ff0074296c0(0000) GS:ffff888126138000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff0073e6f98 CR3: 000000005e650000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	48 c1 e8 03          	shr    $0x3,%rax
   4:	48 89 44 24 08       	mov    %rax,0x8(%rsp)
   9:	48 8b 44 24 08       	mov    0x8(%rsp),%rax
   e:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1)
  12:	74 08                	je     0x1c
  14:	4c 89 f7             	mov    %r14,%rdi
  17:	e8 c5 4a 2c f8       	call   0xf82c4ae1
  1c:	49 8b 2e             	mov    (%r14),%rbp
  1f:	48 83 c5 60          	add    $0x60,%rbp
  23:	48 89 e8             	mov    %rbp,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1) <-- trapping instruction
  2e:	74 08                	je     0x38
  30:	48 89 ef             	mov    %rbp,%rdi
  33:	e8 a9 4a 2c f8       	call   0xf82c4ae1
  38:	4c 8b 6d 00          	mov    0x0(%rbp),%r13
  3c:	e8                   	.byte 0xe8
  3d:	e0 3b                	loopne 0x7a
  3f:	4d                   	rex.WRB