------------[ cut here ]------------
skb_is_nonlinear(skb)
WARNING: ./include/linux/skbuff.h:3325 at skb_trim+0x112/0x1a0, CPU#1: syz.2.761/8417
Modules linked in:
CPU: 1 UID: 0 PID: 8417 Comm: syz.2.761 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 14 eb 2c f8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 ff ea 2c 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:ffffc90007d96df8 EFLAGS: 00010293
RAX: ffffffff899a1e41 RBX: 00000000000004d0 RCX: ffff8881bd875940
RDX: 0000000000000000 RSI: 000000000000011e RDI: 0000000000000000
RBP: 000000000000011e R08: ffff888171dffee3 R09: 1ffff1102e3bffdc
R10: dffffc0000000000 R11: ffffed102e3bffdd R12: ffff8881baecaaf4
R13: dffffc0000000000 R14: ffff8881baecaa80 R15: 1ffff110375d955e
FS:  00007f7c5b6f76c0(0000) GS:ffff8882a8f21000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000f000 CR3: 00000001a70c0000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 sctp_ulpevent_make_rcvmsg+0x3bd/0x970
 sctp_ulpq_tail_data+0xd1/0xed0
 sctp_do_sm+0x1ac0/0x5d50
 sctp_assoc_bh_rcv+0x401/0x6f0
 sctp_backlog_rcv+0x15c/0x370
 __release_sock+0x28b/0x390
 release_sock+0x190/0x260
 sctp_wait_for_connect+0x37f/0x6e0
 sctp_sendmsg_to_asoc+0x16cd/0x1880
 sctp_sendmsg+0x1bb5/0x2d00
 sock_sendmsg_nosec+0x10e/0x180
 ____sys_sendmsg+0x54e/0x850
 ___sys_sendmsg+0x2a5/0x360
 __x64_sys_sendmsg+0x1b1/0x290
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7c5a79e0d9
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:00007f7c5b6f7028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f7c5aa26090 RCX: 00007f7c5a79e0d9
RDX: 0000000000000001 RSI: 0000200000000700 RDI: 0000000000000005
RBP: 00007f7c5a835024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7c5aa26128 R14: 00007f7c5aa26090 R15: 00007ffcee004508
 </TASK>
