syzbot

divide error: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 5.4.125-syzkaller-00028-g73e6d86c30ee #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:genelink_tx_fixup+0x435/0x5f0 drivers/net/usb/gl620a.c:172
Code: 03 42 8a 04 20 84 c0 0f 85 e9 00 00 00 8b 2b 49 83 ed 80 4c 89 e8 48 c1 e8 03 42 8a 04 20 84 c0 0f 85 ed 00 00 00 89 e8 31 d2 <41> f7 75 00 89 d3 31 ff 89 d6 e8 9c 20 a1 fe 85 db 74 07 e8 f3 1c
RSP: 0018:ffff8881f5dcefd0 EFLAGS: 00010246
RAX: 0000000000000062 RBX: ffff8881de33b430 RCX: ffff8881f5dc3f00
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8881de33b430
RBP: 0000000000000062 R08: ffffffff82c43537 R09: 0000000000000003
R10: ffffed103ebb9e2d R11: 0000000000000004 R12: dffffc0000000000
R13: ffff8881de5dc9c0 R14: 000000000000005a R15: ffff8881de33b3c0
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000563baef42368 CR3: 00000001e4a54000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 usbnet_start_xmit+0x107/0x1a10 drivers/net/usb/usbnet.c:1363
 __netdev_start_xmit include/linux/netdevice.h:4506 [inline]
 netdev_start_xmit include/linux/netdevice.h:4520 [inline]
 xmit_one+0xfa/0x470 net/core/dev.c:3203
 dev_hard_start_xmit+0xac/0x1b0 net/core/dev.c:3219
 sch_direct_xmit+0x28c/0x9e0 net/sched/sch_generic.c:336
 qdisc_restart net/sched/sch_generic.c:401 [inline]
 __qdisc_run+0x245/0x420 net/sched/sch_generic.c:409
 qdisc_run include/net/pkt_sched.h:121 [inline]
 __dev_xmit_skb net/core/dev.c:3395 [inline]
 __dev_queue_xmit+0xd2c/0x2e50 net/core/dev.c:3748
 neigh_output include/net/neighbour.h:519 [inline]
 ip6_finish_output2+0xed9/0x15c0 net/ipv6/ip6_output.c:116
 NF_HOOK_COND include/linux/netfilter.h:297 [inline]
 ip6_output+0x1c1/0x420 net/ipv6/ip6_output.c:214
 dst_output include/net/dst.h:444 [inline]
 NF_HOOK include/linux/netfilter.h:308 [inline]
 mld_sendpack+0x606/0xb30 net/ipv6/mcast.c:1679
 mld_send_cr net/ipv6/mcast.c:1975 [inline]
 mld_ifc_timer_expire+0x804/0xb30 net/ipv6/mcast.c:2474
 call_timer_fn+0x30/0x330 kernel/time/timer.c:1416
 expire_timers+0x214/0x410 kernel/time/timer.c:1461
 __run_timers+0x603/0x740 kernel/time/timer.c:1785
 run_timer_softirq+0x46/0x80 kernel/time/timer.c:1798
 __do_softirq+0x23e/0x615 kernel/softirq.c:292
 run_ksoftirqd+0x1f/0x30 kernel/softirq.c:603
 smpboot_thread_fn+0x551/0x930 kernel/smpboot.c:165
 kthread+0x30f/0x330 kernel/kthread.c:268
----------------
Code disassembly (best guess):
   0:	03 42 8a             	add    -0x76(%rdx),%eax
   3:	04 20                	add    $0x20,%al
   5:	84 c0                	test   %al,%al
   7:	0f 85 e9 00 00 00    	jne    0xf6
   d:	8b 2b                	mov    (%rbx),%ebp
   f:	49 83 ed 80          	sub    $0xffffffffffffff80,%r13
  13:	4c 89 e8             	mov    %r13,%rax
  16:	48 c1 e8 03          	shr    $0x3,%rax
  1a:	42 8a 04 20          	mov    (%rax,%r12,1),%al
  1e:	84 c0                	test   %al,%al
  20:	0f 85 ed 00 00 00    	jne    0x113
  26:	89 e8                	mov    %ebp,%eax
  28:	31 d2                	xor    %edx,%edx
* 2a:	41 f7 75 00          	divl   0x0(%r13) <-- trapping instruction
  2e:	89 d3                	mov    %edx,%ebx
  30:	31 ff                	xor    %edi,%edi
  32:	89 d6                	mov    %edx,%esi
  34:	e8 9c 20 a1 fe       	callq  0xfea120d5
  39:	85 db                	test   %ebx,%ebx
  3b:	74 07                	je     0x44
  3d:	e8                   	.byte 0xe8
  3e:	f3                   	repz
  3f:	1c                   	.byte 0x1c