------------[ cut here ]------------
skb_is_nonlinear(skb)
WARNING: ./include/linux/skbuff.h:3354 at skb_trim+0x112/0x1a0, CPU#1: kworker/u10:5/1106
Modules linked in:
CPU: 1 UID: 0 PID: 1106 Comm: kworker/u10:5 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
Workqueue: events_unbound nsim_dev_trap_report_work
RIP: 0010:skb_trim+0x112/0x1a0
Code: 04 28 84 c0 0f 85 81 00 00 00 41 89 1e eb 05 e8 04 86 1d f8 5b 41 5c 41 5d 41 5e 41 5f 5d e9 05 5a 3d 02 cc e8 ef 85 1d 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:ffffc90000a180b8 EFLAGS: 00010246
RAX: ffffffff89aa3f61 RBX: 00000000000003b8 RCX: ffff88816b0d9e00
RDX: 0000000000000100 RSI: 0000000000000100 RDI: 0000000000000000
RBP: 00000000000001a2 R08: 0000000000000100 R09: 1ffff1102dd54ddc
R10: dffffc0000000000 R11: ffffed102dd54ddd R12: ffff8881a93e3e74
R13: dffffc0000000000 R14: ffff8881a93e3e00 R15: 1ffff1103527c7ce
FS:  0000000000000000(0000) GS:ffff8882a8cd6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000087b000 CR3: 00000001072fa000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 sctp_ulpevent_make_rcvmsg+0x3bd/0x970
 sctp_ulpq_tail_data+0xd1/0xed0
 sctp_do_sm+0x1afc/0x5dd0
 sctp_assoc_bh_rcv+0x401/0x6f0
 sctp_rcv+0x11e5/0x18b0
 sctp6_rcv+0x39/0x70
 ip6_protocol_deliver_rcu+0xe8c/0x1680
 ip6_input_finish+0x191/0x370
 NF_HOOK+0x336/0x3c0
 ip6_input+0x16a/0x270
 NF_HOOK+0x336/0x3c0
 process_backlog+0x795/0x18b0
 __napi_poll+0xaa/0x330
 net_rx_action+0x61d/0xf50
 handle_softirqs+0x226/0x860
 __irq_exit_rcu+0xcb/0x220
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:lock_acquire+0x232/0x350
Code: ff ff ff e8 70 6e 41 0a f7 44 24 10 00 02 00 00 0f 84 38 ff ff ff 65 48 8b 05 c2 79 f1 11 48 3b 44 24 50 75 33 fb 48 83 c4 58 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d 87 34 da
RSP: 0018:ffffc90006f274c8 EFLAGS: 00000282
RAX: e1472c81cd90b600 RBX: 0000000000000000 RCX: 8000000000000001
RDX: 000000006e7d2319 RSI: ffffffff8e6fd748 RDI: ffffffff8c6d9480
RBP: ffff88816b0d9e00 R08: ffffffff8177f1df R09: 0000000000000000
R10: ffffc90006f27608 R11: fffff52000de4ecd R12: ffffffff8ed5c760
R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000246
 unwind_next_frame+0xac/0x2550
 __unwind_start+0x514/0x660
 arch_stack_walk+0xe3/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x40/0x50
 __kasan_slab_free+0x5c/0x80
 kmem_cache_free+0x182/0x650
 nsim_dev_trap_report_work+0x7ac/0xb40
 process_scheduled_works+0xc3d/0x1630
 worker_thread+0xa47/0xfb0
 kthread+0x38b/0x480
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
