kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 18980 Comm: syz-executor6 Not tainted 4.14.0-rc4+ #81
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801aa06e280 task.stack: ffff8801d0a30000
RIP: 0010:debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline]
RIP: 0010:do_raw_spin_lock+0x23/0x1e0 kernel/locking/spinlock_debug.c:112
RSP: 0018:ffff8801d0a36ab0 EFLAGS: 00010207
RAX: dffffc0000000000 RBX: 0000000000000018 RCX: 0000000000000000
RDX: 0000000000000003 RSI: 0000000000000000 RDI: 000000000000001c
RBP: ffff8801d0a36ad0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8480b129 R12: ffff8801c69b73a0
R13: dffffc0000000000 R14: ffff8801aa007e00 R15: ffff8801c69b70d8
FS:  00007f56e1436700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f29fc653db8 CR3: 00000001c48f8000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline]
 _raw_spin_lock_bh+0x39/0x40 kernel/locking/spinlock.c:175
 spin_lock_bh include/linux/spinlock.h:321 [inline]
 rt6_select net/ipv6/route.c:786 [inline]
 ip6_pol_route+0x1be3/0x3bd0 net/ipv6/route.c:1650
 ip6_pol_route_output+0x4c/0x60 net/ipv6/route.c:1843
 fib6_rule_lookup+0x9e/0x2a0 net/ipv6/ip6_fib.c:309
 ip6_route_output_flags+0x1f1/0x2b0 net/ipv6/route.c:1871
 ip6_route_output include/net/ip6_route.h:80 [inline]
 ip6_dst_lookup_tail+0x4ea/0x970 net/ipv6/ip6_output.c:953
 ip6_dst_lookup_flow+0xc8/0x270 net/ipv6/ip6_output.c:1076
 sctp_v6_get_dst+0x675/0x1c30 net/sctp/ipv6.c:274
 sctp_transport_route+0xa8/0x430 net/sctp/transport.c:287
 sctp_assoc_add_peer+0x4fe/0x1100 net/sctp/associola.c:656
 sctp_sendmsg+0x1f2a/0x32c0 net/sctp/socket.c:1874
 inet_sendmsg+0x11f/0x5e0 net/ipv4/af_inet.c:763
 sock_sendmsg_nosec net/socket.c:633 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:643
 SYSC_sendto+0x358/0x5a0 net/socket.c:1750
 SyS_sendto+0x40/0x50 net/socket.c:1718
 entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x452719
RSP: 002b:00007f56e1435be8 EFLAGS: 00000212 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00000000007580d8 RCX: 0000000000452719
RDX: 0000000000000027 RSI: 0000000020ffd000 RDI: 0000000000000014
RBP: 00000000000003d9 R08: 0000000020ffdfe4 R09: 000000000000001c
R10: 0000000000008040 R11: 0000000000000212 R12: 00000000006f3cf8
R13: 00000000ffffffff R14: 00007f56e14366d4 R15: 000000000000000e
Code: 0f 1f 84 00 00 00 00 00 55 48 b8 00 00 00 00 00 fc ff df 48 89 e5 41 56 41 55 41 54 53 48 89 fb 48 83 c7 04 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 
RIP: debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline] RSP: ffff8801d0a36ab0
RIP: do_raw_spin_lock+0x23/0x1e0 kernel/locking/spinlock_debug.c:112 RSP: ffff8801d0a36ab0
---[ end trace cda05167c3f04012 ]---