RBP: 00007f31a3baea20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000040 R11: 0000000000000212 R12: 00000000004b757e
R13: 00007f31a3baeb58 R14: 00000000004b758e R15: 0000000000000000
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: 14592 Comm: syz-executor1 Not tainted 4.14.0-rc8+ #123
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801c1406440 task.stack: ffff8801c37f0000
RIP: 0010:sctp_stream_free+0xc3/0x1b0 net/sctp/stream.c:209
RSP: 0018:ffff8801c37f6d20 EFLAGS: 00010202
RAX: 0000000000000000 RBX: ffff8801d2d10bb0 RCX: ffffc90002a63000
RDX: 0000000000000001 RSI: ffffffff849585b8 RDI: 0000000000000008
RBP: ffff8801c37f6d60 R08: 0000000000000000 R09: 1ffff100386fed2c
R10: ffff8801c37f6928 R11: ffffffff85edd738 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: ffffed003a5a2176
FS:  00007f31a3baf700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004d4ac4 CR3: 00000001d4d34000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 sctp_association_free+0x301/0x930 net/sctp/associola.c:367
 sctp_sf_do_unexpected_init.isra.28+0x67e/0x13b0 net/sctp/sm_statefuns.c:1589
 sctp_sf_do_5_2_1_siminit+0x35/0x40 net/sctp/sm_statefuns.c:1645
 sctp_do_sm+0x18a/0x6a30 net/sctp/sm_sideeffect.c:1190
 sctp_assoc_bh_rcv+0x283/0x4b0 net/sctp/associola.c:1065
 sctp_inq_push+0x23b/0x300 net/sctp/inqueue.c:95
 sctp_backlog_rcv+0x177/0xaa0 net/sctp/input.c:350
 sk_backlog_rcv include/net/sock.h:914 [inline]
 __release_sock+0x124/0x360 net/core/sock.c:2266
 release_sock+0xa4/0x2a0 net/core/sock.c:2781
 sctp_sendmsg+0x18d1/0x32b0 net/sctp/socket.c:2051
 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
 ___sys_sendmsg+0x31c/0x890 net/socket.c:2049
 __sys_sendmmsg+0x1e6/0x5f0 net/socket.c:2139
 SYSC_sendmmsg net/socket.c:2170 [inline]
 SyS_sendmmsg+0x35/0x60 net/socket.c:2165
 entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x452879
RSP: 002b:00007f31a3baebe8 EFLAGS: 00000212 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452879
RDX: 0000000000000002 RSI: 000000002093eee8 RDI: 0000000000000013
RBP: 00007f31a3baea20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000040 R11: 0000000000000212 R12: 00000000004b757e
R13: 00007f31a3baeb58 R14: 00000000004b758e R15: 0000000000000000
Code: 48 c1 e8 03 4c 01 f0 48 89 45 d0 e8 88 7c d8 fc 41 80 3f 00 0f 85 f1 00 00 00 48 8b 03 4c 01 e8 48 8d 78 08 48 89 fa 48 c1 ea 03 <42> 80 3c 32 00 0f 85 c3 00 00 00 48 8b 78 08 41 83 c4 01 e8 e5 
RIP: sctp_stream_free+0xc3/0x1b0 net/sctp/stream.c:209 RSP: ffff8801c37f6d20
---[ end trace 11216b5fe780386e ]---