------------[ cut here ]------------
skb_is_nonlinear(skb)
WARNING: ./include/linux/skbuff.h:3346 at skb_trim+0x112/0x1a0, CPU#0: syz.4.28248/6327
Modules linked in:
CPU: 0 UID: 0 PID: 6327 Comm: syz.4.28248 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
RIP: 0010:skb_trim+0x112/0x1a0
Code: 04 28 84 c0 0f 85 81 00 00 00 41 89 1e eb 05 e8 b4 36 03 f8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 9f 36 03 f8 90 <0f> 0b 90 eb e5 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 12 ff ff ff
RSP: 0018:ffffc9000872f058 EFLAGS: 00010293
RAX: ffffffff89c5df31 RBX: 00000000000004bc RCX: ffff8881b4fdbc00
RDX: 0000000000000000 RSI: 00000000000000f6 RDI: 0000000000000000
RBP: 00000000000000f6 R08: ffff888034abfee3 R09: 1ffff11006957fdc
R10: dffffc0000000000 R11: ffffed1006957fdd R12: ffff8880486a3874
R13: dffffc0000000000 R14: ffff8880486a3800 R15: 1ffff110090d470e
FS:  00007f005163b6c0(0000) GS:ffff88818c020000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30621ff8 CR3: 00000001abb7e000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 sctp_ulpevent_make_rcvmsg+0x3bd/0x970
 sctp_ulpq_tail_data+0xd1/0xed0
 sctp_do_sm+0x1afc/0x5dd0
 sctp_assoc_bh_rcv+0x401/0x6f0
 sctp_backlog_rcv+0x15c/0x370
 __release_sock+0x286/0x390
 release_sock+0x190/0x260
 sctp_wait_for_connect+0x442/0x840
 sctp_sendmsg_to_asoc+0x152a/0x1a40
 sctp_sendmsg+0x1bb5/0x2d00
 sock_sendmsg_nosec+0x10f/0x190
 __sys_sendto+0x408/0x5a0
 __x64_sys_sendto+0xde/0x100
 do_syscall_64+0x166/0x520
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f005079f559
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f005163b028 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f0050a25fa0 RCX: 00007f005079f559
RDX: 0000000000034000 RSI: 0000200000000180 RDI: 0000000000000004
RBP: 00007f0050836b20 R08: 00002000000001c0 R09: 000000000000001c
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0050a26038 R14: 00007f0050a25fa0 R15: 00007ffe9ccf8a68
 </TASK>
