Oops: divide error: 0000 [#1] SMP KASAN NOPTI
CPU: 3 UID: 0 PID: 16794 Comm: kworker/u32:3 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:mac80211_hwsim_link_info_changed+0xa1e/0xdc0 drivers/net/wireless/virtual/mac80211_hwsim.c:2556
Code: 80 3c 11 00 0f 85 60 03 00 00 48 8b 4c 24 10 4c 89 ef 48 8d 14 89 48 8b 0c 24 48 c1 e2 04 48 8b b4 11 a0 3f 00 00 31 d2 89 f1 <48> f7 f1 b9 05 00 00 00 29 d6 31 d2 48 69 f6 e8 03 00 00 e8 9a 96
RSP: 0018:ffffc900044cf8e8 EFLAGS: 00010246
RAX: 00063df1e4f073a4 RBX: 0000000000000200 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88806c2e7048
RBP: ffff88805fe3ea28 R08: 0000000000000004 R09: 0000000000029060
R10: 0000000000029060 R11: 0000000000000000 R12: ffff88806c2e0e40
R13: ffff88806c2e7048 R14: 1ffff92000899f22 R15: ffff88806c2e7040
FS:  0000000000000000(0000) GS:ffff8880977c0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000f5bb8824 CR3: 00000000503c1000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 drv_link_info_changed+0x3fc/0x870 net/mac80211/driver-ops.c:491
 ieee80211_link_info_change_notify+0x202/0x3f0 net/mac80211/main.c:428
 ieee80211_offchannel_return+0x380/0x570 net/mac80211/offchannel.c:160
 __ieee80211_scan_completed+0x9ab/0xe40 net/mac80211/scan.c:510
 ieee80211_scan_work+0x3f1/0x2030 net/mac80211/scan.c:1184
 cfg80211_wiphy_work+0x2c4/0x580 net/wireless/core.c:435
 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:mac80211_hwsim_link_info_changed+0xa1e/0xdc0 drivers/net/wireless/virtual/mac80211_hwsim.c:2556
Code: 80 3c 11 00 0f 85 60 03 00 00 48 8b 4c 24 10 4c 89 ef 48 8d 14 89 48 8b 0c 24 48 c1 e2 04 48 8b b4 11 a0 3f 00 00 31 d2 89 f1 <48> f7 f1 b9 05 00 00 00 29 d6 31 d2 48 69 f6 e8 03 00 00 e8 9a 96
RSP: 0018:ffffc900044cf8e8 EFLAGS: 00010246
RAX: 00063df1e4f073a4 RBX: 0000000000000200 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88806c2e7048
RBP: ffff88805fe3ea28 R08: 0000000000000004 R09: 0000000000029060
R10: 0000000000029060 R11: 0000000000000000 R12: ffff88806c2e0e40
R13: ffff88806c2e7048 R14: 1ffff92000899f22 R15: ffff88806c2e7040
FS:  0000000000000000(0000) GS:ffff8880977c0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000f5bb8824 CR3: 00000000503c1000 CR4: 0000000000352ef0
----------------
Code disassembly (best guess):
   0:	80 3c 11 00          	cmpb   $0x0,(%rcx,%rdx,1)
   4:	0f 85 60 03 00 00    	jne    0x36a
   a:	48 8b 4c 24 10       	mov    0x10(%rsp),%rcx
   f:	4c 89 ef             	mov    %r13,%rdi
  12:	48 8d 14 89          	lea    (%rcx,%rcx,4),%rdx
  16:	48 8b 0c 24          	mov    (%rsp),%rcx
  1a:	48 c1 e2 04          	shl    $0x4,%rdx
  1e:	48 8b b4 11 a0 3f 00 	mov    0x3fa0(%rcx,%rdx,1),%rsi
  25:	00
  26:	31 d2                	xor    %edx,%edx
  28:	89 f1                	mov    %esi,%ecx
* 2a:	48 f7 f1             	div    %rcx <-- trapping instruction
  2d:	b9 05 00 00 00       	mov    $0x5,%ecx
  32:	29 d6                	sub    %edx,%esi
  34:	31 d2                	xor    %edx,%edx
  36:	48 69 f6 e8 03 00 00 	imul   $0x3e8,%rsi,%rsi
  3d:	e8                   	.byte 0xe8
  3e:	9a                   	(bad)
  3f:	96                   	xchg   %eax,%esi