Segmentation Fault

[Andrea Scharfe]

Hi there,

I have already tried sending an email to this list, but I got no reply. As
my problem is really urgent, I try again with a shorter email.

I am doing automated traffic tests with wpa_supplicant and from time to time
(sometimes after two hours, sometimes after 6 hours and sometimes not at
all) I get segmentation faults.
I use a customized driver, maybe there is something wrong with my driver,
but there might be a problem with the wpa_supplicant as well.

Let's have a look at my debug output:

after scanning the following occurs:

 selected non-WPA AP 00:16:9d:7c:b5:e0 ssid='root2006_08_30__15_05_09'
Trying to associate with 00:16:9d:7c:b5:e0 (SSID='root2006_08_30__15_05_09'
freq=2447 MHz)
Cancelling scan request
WPA: clearing own WPA/RSN IE
Automatic auth_alg selection: 0x1
WPA: clearing AP WPA IE
WPA: clearing AP RSN IE
WPA: clearing own WPA/RSN IE
No keys have been configured - skip key clearing
State: SCANNING -> ASSOCIATING
ioctl error HEOCDRIVPRIV!: Machine is not on the network
Association request to the driver failed
Setting authentication timeout: 5 sec 0 usec
EAPOL: External notification - portControl=ForceAuthorized
Wireless event: cmd=0x8c02 len=37
Custom wireless event: 'EVENT-DISASSOC.indication'
Added BSSID 00:00:00:00:00:00 into blacklist
State: ASSOCIATING -> DISCONNECTED
EAPOL: External notification - portEnabled=0
EAPOL: External notification - portValid=0
CTRL-EVENT-DISCONNECTED - Disconnect event - remove keys
RX ctrl_iface - hexdump_ascii(len=16):
     52 45 4d 4f 56 45 5f 4e 45 54 57 4f 52 4b 20 30   REMOVE_NETWORK 0
CTRL_IFACE: REMOVE_NETWORK id=0
State: DISCONNECTED -> DISCONNECTED
No keys have been configured - skip key clearing
EAPOL: External notification - portEnabled=0
EAPOL: External notification - portValid=0
RX global ctrl_iface - hexdump_ascii(len=21):
     49 4e 54 45 52 46 41 43 45 5f 52 45 4d 4f 56 45   INTERFACE_REMOVE
     20 65 74 68 31                                     eth1
CTRL_IFACE GLOBAL INTERFACE_REMOVE 'eth1'
Removing interface eth1
State: DISCONNECTED -> DISCONNECTED
No keys have been configured - skip key clearing
EAPOL: External notification - portEnabled=0
EAPOL: External notification - portValid=0
No keys have been configured - skip key clearing
Removed BSSID 00:00:00:00:00:00 from blacklist (clear)
Removed BSSID 00:16:9d:7c:b5:e0 from blacklist (clear)
Cancelling scan request
...
wpa_supplicant is trying to scan two more times...
...
No suitable AP found.
Setting scan request: 5 sec 0 usec
Starting AP scan (broadcast SSID)
RX ctrl_iface - hexdump_ascii(len=16):
     52 45 4d 4f 56 45 5f 4e 45 54 57 4f 52 4b 20 30   REMOVE_NETWORK 0
CTRL_IFACE: REMOVE_NETWORK id=0
State: SCANNING -> DISCONNECTED
No keys have been configured - skip key clearing
EAPOL: External notification - portEnabled=0
EAPOL: External notification - portValid=0
RX global ctrl_iface - hexdump_ascii(len=21):
     49 4e 54 45 52 46 41 43 45 5f 52 45 4d 4f 56 45   INTERFACE_REMOVE
     20 65 74 68 31                                     eth1
CTRL_IFACE GLOBAL INTERFACE_REMOVE 'eth1'
Removing interface eth1
State: DISCONNECTED -> DISCONNECTED
No keys have been configured - skip key clearing
EAPOL: External notification - portEnabled=0
EAPOL: External notification - portValid=0
No keys have been configured - skip key clearing
Cancelling scan request
Scan timeout - try to get results
ioctl error HEOCDRIVPRIV!: Bad file descriptor
Scan results: 16915
Not enough room for all APs (16915 < 128)
Segmentation fault (core dumped)
------------------------------------

this comes from my driver:
ioctl error HEOCDRIVPRIV!: Machine is not on the network

But what does this mean? :
Added BSSID 00:00:00:00:00:00 into blacklist
...
Removed BSSID 00:00:00:00:00:00 from blacklist (clear)
Removed BSSID 00:16:9d:7c:b5:e0 from blacklist (clear)

it seems like there are two scan requests at the same time. And this seems
to lead to the segmentation fault.

Any idea where I might start looking for a bug? Is it possible that there is
a bug in wpa_supplicant?

Please help me! I have to write my diploma thesis about this and right now I
am stuck with this :-(

Thank you!
Andrea
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