Segmentation Faults in hostapd with NetBSD

tn2h tn2h at free.fr
Tue Jun 17 16:04:02 EDT 2008


Hi,

I get the same problem on netbsd current 4.99.64 build this WE and 
hostapd 0.6.2

here the backtrace

Program terminated with signal 11, Segmentation fault.
#0  eapol_sm_step_run (sm=0xbb94f040)
    at 
/home/thom/nbsdcurr/src/usr.sbin/wpa/hostapd/../../../dist/wpa/src/utils/wpabuf.h:58
58              return buf->used;
(gdb) bt
#0  eapol_sm_step_run (sm=0xbb94f040)
    at 
/home/thom/nbsdcurr/src/usr.sbin/wpa/hostapd/../../../dist/wpa/src/utils/wpabuf.h:58
#1  0x08055694 in eapol_port_timers_tick (eloop_ctx=0x0, 
timeout_ctx=0xbb94f040)
    at 
/home/thom/nbsdcurr/src/usr.sbin/wpa/hostapd/../../../dist/wpa/hostapd/eapol_sm.c:170
#2  0x08055f90 in eloop_run ()
    at 
/home/thom/nbsdcurr/src/usr.sbin/wpa/hostapd/../../../dist/wpa/src/utils/eloop.c:474
#3  0x08057a8a in main (argc=Cannot access memory at address 0x0
)
    at 
/home/thom/nbsdcurr/src/usr.sbin/wpa/hostapd/../../../dist/wpa/hostapd/hostapd.c:1931


You can find the binary and the core here :
http://tn2h.free.fr/ml/

Thomas


Jouni Malinen a écrit :
> On Fri, Jun 13, 2008 at 10:18:41AM -0500, David Dudley wrote:
>
>   
>> About every couple of hours or so, the program segfaults.  When I
>> restart it, it will segfault 2 or 3 times upon restarting (first
>> quickly, in a second or two, next more slowly, maybe in 10 seconds, then
>> perhaps again, perhaps not), before assuming a stable operation for
>> another period of time.
>>
>> This is on NetBSD 4, on a Soekris net5501, with an Atheros network
>> card.
>>     
>
> Do you have possibility of running a debugger on that board or getting a
> core dump for remote analysis? I would like to get bit more detailed
> information on what exactly is crashing the program and getting a
> backtrace or even the current function at the time of the segfault would
> be quite helpful.
>
>   
>> Would updating to the latest version possibly cure the problem?  I know
>> that 0.6.2 is not the latest, so would be glad to take that route if it
>> might be an improvement.
>>     
>
> Well, it is of course possible that a bug that is causing this has been
> fixed in 0.6.3, but since I do not have any idea what exactly is
> triggering the crash, I don't know how likely it would be for this to be
> the case.
>
>   
>> PS: My next question is going to be on how to authorize Windows XP
>> clients to use the system.  Whenever I try to authenticate one, it says
>> something about needing a certificate?
>>     
>
> If you are using PEAP with Windows XP, you would need to configure a
> trusted CA certificate on the client to allow it to authenticate the
> authentication server. For a quick, but not really secure, test, you
> could temporarily disable the server certificate validation in the
> client and see whether that removes this message about the certificate.
>
>   



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