Oops: general protection fault, probably for non-canonical address 0xdffffc000000000c: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000060-0x0000000000000067]
CPU: 2 UID: 0 PID: 7749 Comm: syz.1.492 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:fib6_nh_get_excptn_bucket+0x11f/0x1e0 net/ipv6/route.c:1662
Code: 05 3f 58 60 06 01 e8 a0 47 8e f7 e9 2e ff ff ff e8 86 b6 b2 f7 48 8d 7b 60 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 a7 00 00 00 48 8b 5b 60 e8 be 95 56 01 31 ff 89
RSP: 0018:ffffc90005e97370 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff8a0a9d23
RDX: 000000000000000c RSI: ffffffff8a0a315a RDI: 0000000000000060
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: fffff52000bd2e9c R14: 1ffff92000bd2e9d R15: dffffc0000000000
FS:  00007f3392d7c6c0(0000) GS:ffff8880d6c05000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000140 CR3: 000000004aec9000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 rt6_find_cached_rt+0x151/0x280 net/ipv6/route.c:1860
 ip6_pol_route+0x238/0x1230 net/ipv6/route.c:2276
 pol_lookup_func include/net/ip6_fib.h:617 [inline]
 fib6_rule_lookup+0x386/0x720 net/ipv6/fib6_rules.c:125
 ip6_route_output_flags_noref net/ipv6/route.c:2684 [inline]
 ip6_route_output_flags+0x1d0/0x640 net/ipv6/route.c:2696
 ip6_route_output include/net/ip6_route.h:93 [inline]
 ip6_dst_lookup_tail.constprop.0+0xa52/0x2140 net/ipv6/ip6_output.c:1141
 ip6_dst_lookup_flow+0x99/0x1d0 net/ipv6/ip6_output.c:1272
 sctp_v6_get_dst+0x6a2/0x2050 net/sctp/ipv6.c:327
 sctp_transport_route+0x132/0x350 net/sctp/transport.c:448
 sctp_assoc_add_peer+0x741/0x1550 net/sctp/associola.c:663
 sctp_connect_new_asoc+0x1f8/0x770 net/sctp/socket.c:1099
 __sctp_connect+0x3f3/0xc60 net/sctp/socket.c:1197
 sctp_connect net/sctp/socket.c:4819 [inline]
 sctp_inet_connect+0x15f/0x200 net/sctp/socket.c:4834
 __sys_connect_file+0x141/0x1a0 net/socket.c:2102
 __sys_connect+0x13b/0x160 net/socket.c:2121
 __do_sys_connect net/socket.c:2127 [inline]
 __se_sys_connect net/socket.c:2124 [inline]
 __x64_sys_connect+0x72/0xb0 net/socket.c:2124
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3391f8f749
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:00007f3392d7c038 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 00007f33921e5fa0 RCX: 00007f3391f8f749
RDX: 000000000000001c RSI: 0000200000000300 RDI: 0000000000000003
RBP: 00007f3392013f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f33921e6038 R14: 00007f33921e5fa0 R15: 00007fffac99b538
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:fib6_nh_get_excptn_bucket+0x11f/0x1e0 net/ipv6/route.c:1662
Code: 05 3f 58 60 06 01 e8 a0 47 8e f7 e9 2e ff ff ff e8 86 b6 b2 f7 48 8d 7b 60 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 a7 00 00 00 48 8b 5b 60 e8 be 95 56 01 31 ff 89
RSP: 0018:ffffc90005e97370 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff8a0a9d23
RDX: 000000000000000c RSI: ffffffff8a0a315a RDI: 0000000000000060
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: fffff52000bd2e9c R14: 1ffff92000bd2e9d R15: dffffc0000000000
FS:  00007f3392d7c6c0(0000) GS:ffff8880d6c05000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000564d4b6cead8 CR3: 000000004aec9000 CR4: 0000000000352ef0
----------------
Code disassembly (best guess):
   0:	05 3f 58 60 06       	add    $0x660583f,%eax
   5:	01 e8                	add    %ebp,%eax
   7:	a0 47 8e f7 e9 2e ff 	movabs 0xffffff2ee9f78e47,%al
   e:	ff ff
  10:	e8 86 b6 b2 f7       	call   0xf7b2b69b
  15:	48 8d 7b 60          	lea    0x60(%rbx),%rdi
  19:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  20:	fc ff df
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 a7 00 00 00    	jne    0xdb
  34:	48 8b 5b 60          	mov    0x60(%rbx),%rbx
  38:	e8 be 95 56 01       	call   0x15695fb
  3d:	31 ff                	xor    %edi,%edi
  3f:	89                   	.byte 0x89