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Date:      Wed, 4 Sep 2013 00:39:01 +0300
From:      Juris Kaminskis <juris.kaminskis@gmail.com>
To:        freebsd-net@freebsd.org
Subject:   Restart of wireless service creates crash in system
Message-ID:  <CAKJAkzum_tRTg5eHCXRxEBrcuMGsv2TaS5tJToxbr4Qr20heuQ@mail.gmail.com>

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Hello,

I was trying to set up new wireless network. I had sucessful setup in my
home over wireless but when I moved to hotel and wanted to hook up to
wireless network i got some problems.

first I changed /etc/wpa_supplicant.conf to read new network ssid and psk.
then I did:

ifconfig wlan0 destroy

and then after:

service netif start

After I got crash of my freebsd system and reboot. Contents of my
/etc/rc.conf:
wlans_iwi0="wlan0"
ifconfig_wlan0="WPA DHCP"

and details of /var/crash/core.txt.8 (not all):
Unread portion of the kernel message buffer:
wlan0: ieee80211_new_state_locked: pending SCAN -> AUTH transition lost


Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0xc66561d4
fault code              = supervisor read, page not present
instruction pointer     = 0x20:0xc0751582
stack pointer           = 0x28:0xc3bdab58
frame pointer           = 0x28:0xc3bdac08
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1


Even if I did something wrong probably system should not just crash and
reboot. But I also do not know what I did wrong.

What is interesting that after crash and reboot of system my
/etc/wpa_supplicant.conf become empty. And to actually fix my wireless
network I changed once again /etc/wpa_supplicant.conf and just rebooted
computer which did the trick.

regards
Juris



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