general protection fault, probably for non-canonical address 0xdffffc000000005e: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000002f0-0x00000000000002f7]
CPU: 0 PID: 7252 Comm: kworker/u4:496 Tainted: G        W         5.15.185-syzkaller-00071-g79bd7c447241 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: wg-kex-wg2 wg_packet_handshake_send_worker
RIP: 0010:__in6_dev_get include/net/addrconf.h:341 [inline]
RIP: 0010:ip6_ignore_linkdown include/net/addrconf.h:432 [inline]
RIP: 0010:find_match+0xb7/0xf20 net/ipv6/route.c:744
Code: 7c 05 00 00 74 08 48 89 df e8 65 36 87 fd 48 89 d8 bb f0 02 00 00 48 03 18 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 3b 36 87 fd 48 8b 1b 48 85 db 0f 84
RSP: 0000:ffffc900069d7000 EFLAGS: 00010202
RAX: 000000000000005e RBX: 00000000000002f0 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900069d70b8 R08: ffffc900069d73e0 R09: ffffc900069d73f0
R10: fffff52000d3ae9e R11: 1ffff92000d3ae9a R12: 0000000000000201
R13: 1ffff110258a7f24 R14: 0000000000000000 R15: 0000000000000003
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d70fff8 CR3: 000000011cf8c000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 rt6_nh_find_match+0xd9/0x140 net/ipv6/route.c:784
 nexthop_for_each_fib6_nh+0xf6/0x1e0 net/ipv4/nexthop.c:1242
 __find_rr_leaf+0x50f/0x900 net/ipv6/route.c:825
 find_rr_leaf net/ipv6/route.c:853 [inline]
 rt6_select net/ipv6/route.c:897 [inline]
 fib6_table_lookup+0x2f4/0x9f0 net/ipv6/route.c:2189
 ip6_pol_route+0x145/0x1110 net/ipv6/route.c:2225
 ip6_pol_route_output+0x51/0x80 net/ipv6/route.c:2601
 pol_lookup_func include/net/ip6_fib.h:592 [inline]
 fib6_rule_lookup+0x2ef/0x560 net/ipv6/fib6_rules.c:120
 ip6_route_output_flags_noref+0x283/0x340 net/ipv6/route.c:2633
 ip6_route_output_flags+0x3c/0x200 net/ipv6/route.c:2646
 ip6_route_output include/net/ip6_route.h:98 [inline]
 ip6_dst_lookup_tail+0x139/0x1370 net/ipv6/ip6_output.c:1102
 ip6_dst_lookup_flow+0x49/0xc0 net/ipv6/ip6_output.c:1232
 send6+0x3a0/0x640 drivers/net/wireguard/socket.c:139
 wg_socket_send_skb_to_peer+0x114/0x1d0 drivers/net/wireguard/socket.c:178
 wg_socket_send_buffer_to_peer+0x118/0x170 drivers/net/wireguard/socket.c:200
 wg_packet_send_handshake_initiation drivers/net/wireguard/send.c:40 [inline]
 wg_packet_handshake_send_worker+0x1d4/0x240 drivers/net/wireguard/send.c:51
 process_one_work+0x6be/0xba0 kernel/workqueue.c:2325
 worker_thread+0xa59/0x1200 kernel/workqueue.c:2472
 kthread+0x411/0x500 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
Modules linked in:
---[ end trace 0be8d4842d8c826f ]---
RIP: 0010:__in6_dev_get include/net/addrconf.h:341 [inline]
RIP: 0010:ip6_ignore_linkdown include/net/addrconf.h:432 [inline]
RIP: 0010:find_match+0xb7/0xf20 net/ipv6/route.c:744
Code: 7c 05 00 00 74 08 48 89 df e8 65 36 87 fd 48 89 d8 bb f0 02 00 00 48 03 18 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 3b 36 87 fd 48 8b 1b 48 85 db 0f 84
RSP: 0000:ffffc900069d7000 EFLAGS: 00010202
RAX: 000000000000005e RBX: 00000000000002f0 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900069d70b8 R08: ffffc900069d73e0 R09: ffffc900069d73f0
R10: fffff52000d3ae9e R11: 1ffff92000d3ae9a R12: 0000000000000201
R13: 1ffff110258a7f24 R14: 0000000000000000 R15: 0000000000000003
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d70fff8 CR3: 000000000660f000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	7c 05                	jl     0x7
   2:	00 00                	add    %al,(%rax)
   4:	74 08                	je     0xe
   6:	48 89 df             	mov    %rbx,%rdi
   9:	e8 65 36 87 fd       	call   0xfd873673
   e:	48 89 d8             	mov    %rbx,%rax
  11:	bb f0 02 00 00       	mov    $0x2f0,%ebx
  16:	48 03 18             	add    (%rax),%rbx
  19:	48 89 d8             	mov    %rbx,%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:	80 3c 08 00          	cmpb   $0x0,(%rax,%rcx,1) <-- trapping instruction
  2e:	74 08                	je     0x38
  30:	48 89 df             	mov    %rbx,%rdi
  33:	e8 3b 36 87 fd       	call   0xfd873673
  38:	48 8b 1b             	mov    (%rbx),%rbx
  3b:	48 85 db             	test   %rbx,%rbx
  3e:	0f                   	.byte 0xf
  3f:	84                   	.byte 0x84