Oops: general protection fault, probably for non-canonical address 0xdffffc0000000083: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000418-0x000000000000041f]
CPU: 0 UID: 0 PID: 10411 Comm: syz.2.1186 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:fib_lookup_good_nhc+0x85/0x3d0
Code: 4c 89 24 24 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 0b 6d 1a f8 41 bc 18 04 00 00 4c 03 23 4c 89 e0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 e7 e8 ec 6c 1a f8 4d 8b 24 24 e8 93 f9
RSP: 0018:ffffc900064575f8 EFLAGS: 00010202
RAX: 0000000000000083 RBX: ffff8880331fb720 RCX: 0000000000000002
RDX: ffff888029e4d640 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8880331fb737 R08: 0000000000000000 R09: ffffffff89e9c0d6
R10: ffffc900064578c0 R11: fffff52000c8af1e R12: 0000000000000418
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff1100663f6e6
FS:  00007f0f1163e6c0(0000) GS:ffff8880b8614000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c332003 CR3: 0000000112618000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 nexthop_get_nhc_lookup+0x1af/0x400
 fib_table_lookup+0xf26/0x16e0
 fib_lookup+0x1c5/0x440
 ip_route_output_key_hash_rcu+0x31b/0x23e0
 ip_route_output_key_hash+0x174/0x280
 ip_route_output_flow+0x2a/0x150
 raw_sendmsg+0x1039/0x18b0
 __sock_sendmsg+0x19c/0x270
 __sys_sendto+0x3bd/0x520
 __x64_sys_sendto+0xde/0x100
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0f1078eba9
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:00007f0f1163e038 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f0f109d5fa0 RCX: 00007f0f1078eba9
RDX: 00000000000000cc RSI: 0000200000000680 RDI: 0000000000000003
RBP: 00007f0f10811e19 R08: 00002000000002c0 R09: 0000000000000010
R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0f109d6038 R14: 00007f0f109d5fa0 R15: 00007ffdac437378
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:fib_lookup_good_nhc+0x85/0x3d0
Code: 4c 89 24 24 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 0b 6d 1a f8 41 bc 18 04 00 00 4c 03 23 4c 89 e0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 e7 e8 ec 6c 1a f8 4d 8b 24 24 e8 93 f9
RSP: 0018:ffffc900064575f8 EFLAGS: 00010202
RAX: 0000000000000083 RBX: ffff8880331fb720 RCX: 0000000000000002
RDX: ffff888029e4d640 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8880331fb737 R08: 0000000000000000 R09: ffffffff89e9c0d6
R10: ffffc900064578c0 R11: fffff52000c8af1e R12: 0000000000000418
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff1100663f6e6
FS:  00007f0f1163e6c0(0000) GS:ffff8880b8614000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0f1161dd58 CR3: 0000000112618000 CR4: 00000000000006f0
