kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 17478 Comm: syz-executor.0 Not tainted 5.2.0-rc2+ #17
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:ip6_route_get_saddr include/net/ip6_route.h:120 [inline]
RIP: 0010:ip6_dst_lookup_tail+0xf0e/0x1b30 net/ipv6/ip6_output.c:1032
Code: e6 07 e8 65 66 55 fb 48 85 db 0f 84 83 08 00 00 e8 57 66 55 fb 48 8d 7b 7c 48 b8 00 00 00 00 00 fc ff df 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 07
RSP: 0018:ffff8880a77f7440 EFLAGS: 00010a07
RAX: dffffc0000000000 RBX: ff8880601c000000 RCX: ffffc90005a53000
RDX: 1ff1100c0380000f RSI: ffffffff861b3f69 RDI: ff8880601c00007c
RBP: ffff8880a77f7598 R08: ffff888091a2e600 R09: ffffed1015d06be8
R10: ffffed1015d06be7 R11: ffff8880ae835f3b R12: ffff88808ad2c4f0
R13: 0000000000000000 R14: 0000000000000000 R15: ffff88808ad2c518
FS:  00007ff621af1700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000070e158 CR3: 000000009fde2000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ip6_dst_lookup_flow+0xa8/0x220 net/ipv6/ip6_output.c:1155
 sctp_v6_get_dst+0x785/0x1d80 net/sctp/ipv6.c:278
 sctp_transport_route+0x12d/0x360 net/sctp/transport.c:297
 sctp_assoc_add_peer+0x53e/0xfc0 net/sctp/associola.c:663
 sctp_sendmsg_new_asoc+0x5d5/0xfd0 net/sctp/socket.c:1742
 sctp_sendmsg+0x125a/0x17d0 net/sctp/socket.c:2075
 inet_sendmsg+0x141/0x5d0 net/ipv4/af_inet.c:802
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xd7/0x130 net/socket.c:671
 ___sys_sendmsg+0x803/0x920 net/socket.c:2292
 __sys_sendmsg+0x105/0x1d0 net/socket.c:2330
 __do_sys_sendmsg net/socket.c:2339 [inline]
 __se_sys_sendmsg net/socket.c:2337 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2337
 do_syscall_64+0xfd/0x680 arch/x86/entry/common.c:301
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459279
Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ff621af0c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459279
RDX: 00000000000000fc RSI: 00000000200006c0 RDI: 0000000000000004
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff621af16d4
R13: 00000000004c68b2 R14: 00000000004db880 R15: 00000000ffffffff
Modules linked in:
---[ end trace d32951d209762f14 ]---
RIP: 0010:ip6_route_get_saddr include/net/ip6_route.h:120 [inline]
RIP: 0010:ip6_dst_lookup_tail+0xf0e/0x1b30 net/ipv6/ip6_output.c:1032
Code: e6 07 e8 65 66 55 fb 48 85 db 0f 84 83 08 00 00 e8 57 66 55 fb 48 8d 7b 7c 48 b8 00 00 00 00 00 fc ff df 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 07
RSP: 0018:ffff8880a77f7440 EFLAGS: 00010a07
RAX: dffffc0000000000 RBX: ff8880601c000000 RCX: ffffc90005a53000
RDX: 1ff1100c0380000f RSI: ffffffff861b3f69 RDI: ff8880601c00007c
RBP: ffff8880a77f7598 R08: ffff888091a2e600 R09: ffffed1015d06be8
R10: ffffed1015d06be7 R11: ffff8880ae835f3b R12: ffff88808ad2c4f0
R13: 0000000000000000 R14: 0000000000000000 R15: ffff88808ad2c518
FS:  00007ff621af1700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffdd9826e5c CR3: 000000009fde2000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400