general protection fault, probably for non-canonical address 0xdffffc0000000068: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000340-0x0000000000000347]
CPU: 1 PID: 32234 Comm: kworker/1:3 Not tainted 6.4.0-rc7-syzkaller-00202-g6f68fc395f49 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Workqueue: ipv6_addrconf addrconf_dad_work
RIP: 0010:__mkroute_output net/ipv4/route.c:2512 [inline]
RIP: 0010:ip_route_output_key_hash_rcu+0x37f/0x2bc0 net/ipv4/route.c:2812
Code: 80 66 44 89 54 24 2c 49 8d ac 24 40 03 00 00 48 89 44 24 30 e8 a2 1e f8 f8 48 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 0f 23 00 00 49 8b 84 24 40 03 00 00 48 89 04 24
RSP: 0018:ffffc9001c5e7160 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffffc9001c5e74e8 RCX: 0000000000000000
RDX: 0000000000000068 RSI: ffffffff888c2abe RDI: ffffc9001c5e7220
RBP: 0000000000000340 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000094001 R12: 0000000000000000
R13: ffff888031331cc0 R14: 0000000000000000 R15: ffffc9001c5e7208
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000562fe87a4848 CR3: 000000008cd14000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ip_route_output_key_hash+0x18f/0x340 net/ipv4/route.c:2641
 __ip_route_output_key include/net/route.h:134 [inline]
 ip_route_output_flow+0x27/0x150 net/ipv4/route.c:2869
 ip_route_output_key include/net/route.h:150 [inline]
 geneve_get_v4_rt+0x497/0xc30 drivers/net/geneve.c:828
 geneve_xmit_skb drivers/net/geneve.c:918 [inline]
 geneve_xmit+0xd20/0x4990 drivers/net/geneve.c:1103
 __netdev_start_xmit include/linux/netdevice.h:4918 [inline]
 netdev_start_xmit include/linux/netdevice.h:4932 [inline]
 xmit_one net/core/dev.c:3578 [inline]
 dev_hard_start_xmit+0x187/0x700 net/core/dev.c:3594
 __dev_queue_xmit+0x2be2/0x3b10 net/core/dev.c:4244
 dev_queue_xmit include/linux/netdevice.h:3088 [inline]
 neigh_resolve_output net/core/neighbour.c:1552 [inline]
 neigh_resolve_output+0x51b/0x870 net/core/neighbour.c:1532
 neigh_output include/net/neighbour.h:544 [inline]
 ip6_finish_output2+0x55a/0x1560 net/ipv6/ip6_output.c:134
 __ip6_finish_output net/ipv6/ip6_output.c:195 [inline]
 ip6_finish_output+0x69a/0x1170 net/ipv6/ip6_output.c:206
 NF_HOOK_COND include/linux/netfilter.h:292 [inline]
 ip6_output+0x1f1/0x540 net/ipv6/ip6_output.c:227
 dst_output include/net/dst.h:458 [inline]
 NF_HOOK include/linux/netfilter.h:303 [inline]
 ndisc_send_skb+0xa63/0x1850 net/ipv6/ndisc.c:508
 ndisc_send_ns+0xaa/0x130 net/ipv6/ndisc.c:666
 addrconf_dad_work+0xbf4/0x1390 net/ipv6/addrconf.c:4176
 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405
 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552
 kthread+0x344/0x440 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__mkroute_output net/ipv4/route.c:2512 [inline]
RIP: 0010:ip_route_output_key_hash_rcu+0x37f/0x2bc0 net/ipv4/route.c:2812
Code: 80 66 44 89 54 24 2c 49 8d ac 24 40 03 00 00 48 89 44 24 30 e8 a2 1e f8 f8 48 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 0f 23 00 00 49 8b 84 24 40 03 00 00 48 89 04 24
RSP: 0018:ffffc9001c5e7160 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffffc9001c5e74e8 RCX: 0000000000000000
RDX: 0000000000000068 RSI: ffffffff888c2abe RDI: ffffc9001c5e7220
RBP: 0000000000000340 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000094001 R12: 0000000000000000
R13: ffff888031331cc0 R14: 0000000000000000 R15: ffffc9001c5e7208
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000562fe87a4848 CR3: 000000008cd14000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	80 66 44 89          	andb   $0x89,0x44(%rsi)
   4:	54                   	push   %rsp
   5:	24 2c                	and    $0x2c,%al
   7:	49 8d ac 24 40 03 00 	lea    0x340(%r12),%rbp
   e:	00
   f:	48 89 44 24 30       	mov    %rax,0x30(%rsp)
  14:	e8 a2 1e f8 f8       	callq  0xf8f81ebb
  19:	48 89 ea             	mov    %rbp,%rdx
  1c:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  23:	fc ff df
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 0f 23 00 00    	jne    0x2343
  34:	49 8b 84 24 40 03 00 	mov    0x340(%r12),%rax
  3b:	00
  3c:	48 89 04 24          	mov    %rax,(%rsp)