Comment 0 for bug 1712746

When it's in AP mode, there's quite a chance to find kernel oops during reboot.

[ 30.701441] BUG: unable to handle kernel NULL pointer dereference at 00000000000000f0
[ 30.709511] IP: [<ffffffffc05781b9>] mwifiex_get_cfp+0x49/0x150 [mwifiex]
[ 30.716494] PGD 0
[ 30.718575] Oops: 0000 [#1] SMP
[ 30.721918] Modules linked in: ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conni
[ 30.836915] CPU: 1 PID: 679 Comm: kworker/u5:0 Not tainted 4.4.0-57-generic #78-Ubuntu
[ 30.845018] Hardware name: Dell Inc. Edge Gateway 5000/ , BIOS 01.05.00 10/18/2016
[ 30.853218] Workqueue: MWIFIEX_WORK_QUEUE mwifiex_main_work_queue [mwifiex]
[ 30.860362] task: ffff880077c11980 ti: ffff880075e48000 task.ti: ffff880075e48000
[ 30.868018] RIP: 0010:[<ffffffffc05781b9>] [<ffffffffc05781b9>] mwifiex_get_cfp+0x49/0x150 [mwifiex]
[ 30.877484] RSP: 0018:ffff880075e4bbf8 EFLAGS: 00010202
[ 30.882920] RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000000004
[ 30.890221] RDX: 0010000000110010 RSI: 0000000000000004 RDI: 0000000000000004
[ 30.897520] RBP: ffff880075e4bc28 R08: 0000000000000003 R09: 0000000000000001
[ 30.904821] R10: 0000000000000001 R11: 00000000000002ff R12: 0000000000000095
[ 30.912123] R13: 0000000000000000 R14: ffff880075e40000 R15: 0000000000000095
[ 30.919425] FS: 0000000000000000(0000) GS:ffff880071300000(0000) knlGS:0000000000000000
[ 30.927701] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 30.933581] CR2: 00000000000000f0 CR3: 0000000001e0a000 CR4: 00000000001006e0
[ 30.940882] Stack:
[ 30.942944] 0000000000000118 ffff880075e40000 ffff8800750c4000 ffff880075e3ed59
[ 30.950592] 0000000000000095 ffff880075e3ee01 ffff880075e4bcd0 ffffffffc05846fc
[ 30.958232] 0000000000000000 ffff880075e4bc50 ffffffff8140bcb5 ffff880075e4bc70
[ 30.965873] Call Trace:
[ 30.968397] [<ffffffffc05846fc>] mwifiex_parse_single_response_buf+0x1fc/0x560 [mwifiex]
[ 30.976772] [<ffffffff8140bcb5>] ? find_next_bit+0x15/0x20
[ 30.982490] [<ffffffffc0584d9c>] mwifiex_handle_event_ext_scan_report+0x15c/0x340 [mwifiex]
[ 30.991139] [<ffffffffc058f4c6>] mwifiex_process_sta_event+0x276/0xb40 [mwifiex]
[ 30.998806] [<ffffffffc0578952>] mwifiex_process_event+0x102/0x1c0 [mwifiex]
[ 31.006120] [<ffffffffc057677e>] mwifiex_main_process+0x5de/0x8d0 [mwifiex]
[ 31.013346] [<ffffffffc0576a8f>] mwifiex_main_work_queue+0x1f/0x30 [mwifiex]
[ 31.020650] [<ffffffff8109a575>] process_one_work+0x165/0x480
[ 31.026624] [<ffffffff8109a8db>] worker_thread+0x4b/0x4c0
[ 31.032240] [<ffffffff8109a890>] ? process_one_work+0x480/0x480
[ 31.038387] [<ffffffff810a0c08>] kthread+0xd8/0xf0
[ 31.043384] [<ffffffff810a0b30>] ? kthread_create_on_node+0x1e0/0x1e0
[ 31.050071] [<ffffffff8183788f>] ret_from_fork+0x3f/0x70
[ 31.055596] [<ffffffff810a0b30>] ? kthread_create_on_node+0x1e0/0x1e0
[ 31.062276] Code: 85 c9 0f 84 ef 00 00 00 40 0f b6 de 49 89 fe 41 89 cd 89 df 41 89 d4 e8 46 f1 00 00 84 c0 49 8b 86 e0 13 00 00 0f 84 98 00
[ 31.082756] RIP [<ffffffffc05781b9>] mwifiex_get_cfp+0x49/0x150 [mwifiex]
[ 31.089820] RSP <ffff880075e4bbf8>
[ 31.093392] CR2: 00000000000000f0
[ 31.096787] ---[ end trace f3a762be5787f138 ]---