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: 5693 Comm: kworker/u8:2 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
Workqueue: krdsd rds_connect_worker
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 fb 2a 1b 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 dc 2a 1b f8 4d 8b 24 24 e8 33 b5
RSP: 0018:ffffc90002d6eeb0 EFLAGS: 00010202
RAX: 0000000000000083 RBX: ffff8880414bc120 RCX: 0000000000000000
RDX: ffff888106a81cc0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8880414bc137 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000000 R12: 0000000000000418
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff11008297826
FS:  0000000000000000(0000) GS:ffff8880b861b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557da705c8 CR3: 000000010704e000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 nexthop_get_nhc_lookup+0x1af/0x400
 fib_table_lookup+0xf26/0x16e0
 fib4_rule_action+0x1fb/0x330
 fib_rules_lookup+0x8a6/0xe90
 __fib_lookup+0xf9/0x200
 ip_route_output_key_hash_rcu+0x31b/0x23d0
 ip_route_output_key_hash+0x1b9/0x2e0
 ip_route_output_flow+0x2a/0x150
 tcp_v4_connect+0x846/0x1a00
 __inet_stream_connect+0x2ae/0xe80
 inet_stream_connect+0x66/0xa0
 kernel_connect+0x116/0x180
 rds_tcp_conn_path_connect+0x512/0x680
 rds_connect_worker+0x1d8/0x290
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </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 fb 2a 1b 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 dc 2a 1b f8 4d 8b 24 24 e8 33 b5
RSP: 0018:ffffc90002d6eeb0 EFLAGS: 00010202
RAX: 0000000000000083 RBX: ffff8880414bc120 RCX: 0000000000000000
RDX: ffff888106a81cc0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8880414bc137 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000000 R12: 0000000000000418
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff11008297826
FS:  0000000000000000(0000) GS:ffff8881a3c1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557da705c8 CR3: 000000010704e000 CR4: 00000000000006f0
