* bug: NULL pointer access?
@ 2012-01-05 14:59 Daniel Wagner
2012-01-05 15:40 ` Denis Kenzior
0 siblings, 1 reply; 3+ messages in thread
From: Daniel Wagner @ 2012-01-05 14:59 UTC (permalink / raw)
To: ofono
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Hi,
I just managed to get this backtrace:
ofonod[1808]: ++++++++ backtrace ++++++++
ofonod[1808]: #0 0x3366c0f500 in /lib64/libpthread.so.0
ofonod[1808]: #1 0x3366836285 in /lib64/libc.so.6
ofonod[1808]: #2 0x3366837b9b in /lib64/libc.so.6
ofonod[1808]: #3 0x336982fd85 in /lib64/libdbus-1.so.3
ofonod[1808]: #4 0x3369826e31 in /lib64/libdbus-1.so.3
ofonod[1808]: #5 0x336981b806 in /lib64/libdbus-1.so.3
ofonod[1808]: #6 0x4db083 in pri_activate_callback() at src/gprs.c:871
ofonod[1808]: #7 0x4611cf in ppp_connect() at drivers/atmodem/gprs-context.c:101
ofonod[1808]: #8 0x447fdd in ppp_ipcp_up_notify() at gatchat/gatppp.c:415
ofonod[1808]: #9 0x44bdbc in ipcp_up() at gatchat/ppp_ipcp.c:173
ofonod[1808]: #10 0x44911d in pppcp_this_layer_up() at gatchat/ppp_cp.c:322
ofonod[1808]: #11 0x449e5e in pppcp_generate_event() at gatchat/ppp_cp.c:690
ofonod[1808]: #12 0x44a68b in pppcp_process_packet() at gatchat/ppp_cp.c:967
ofonod[1808]: #13 0x447905 in ppp_receive() at gatchat/gatppp.c:224
ofonod[1808]: #14 0x446994 in new_bytes() at gatchat/gathdlc.c:301
ofonod[1808]: #15 0x43edf3 in received_data() at gatchat/gatio.c:124
ofonod[1808]: #16 0x3368844a7d in /lib64/libglib-2.0.so.0
ofonod[1808]: #17 0x3368845278 in /lib64/libglib-2.0.so.0
ofonod[1808]: #18 0x33688457c5 in /lib64/libglib-2.0.so.0
ofonod[1808]: #19 0x496c4e in main() at src/main.c:262
ofonod[1808]: #20 0x336682169d in /lib64/libc.so.6
ofonod[1808]: +++++++++++++++++++++++++++
static void pri_activate_callback(const struct ofono_error *error, void *data)
{
[...]
__ofono_dbus_pending_reply(&ctx->pending,
dbus_message_new_method_return(ctx->pending));
[...]
}
I guess ctx->pending is NULL.
cheers,
daniel
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: bug: NULL pointer access?
2012-01-05 14:59 bug: NULL pointer access? Daniel Wagner
@ 2012-01-05 15:40 ` Denis Kenzior
2012-01-16 8:37 ` Daniel Wagner
0 siblings, 1 reply; 3+ messages in thread
From: Denis Kenzior @ 2012-01-05 15:40 UTC (permalink / raw)
To: ofono
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Hi Daniel,
On 01/05/2012 08:59 AM, Daniel Wagner wrote:
> Hi,
>
> I just managed to get this backtrace:
>
> ofonod[1808]: ++++++++ backtrace ++++++++
> ofonod[1808]: #0 0x3366c0f500 in /lib64/libpthread.so.0
> ofonod[1808]: #1 0x3366836285 in /lib64/libc.so.6
> ofonod[1808]: #2 0x3366837b9b in /lib64/libc.so.6
> ofonod[1808]: #3 0x336982fd85 in /lib64/libdbus-1.so.3
> ofonod[1808]: #4 0x3369826e31 in /lib64/libdbus-1.so.3
> ofonod[1808]: #5 0x336981b806 in /lib64/libdbus-1.so.3
> ofonod[1808]: #6 0x4db083 in pri_activate_callback() at src/gprs.c:871
> ofonod[1808]: #7 0x4611cf in ppp_connect() at drivers/atmodem/gprs-context.c:101
> ofonod[1808]: #8 0x447fdd in ppp_ipcp_up_notify() at gatchat/gatppp.c:415
> ofonod[1808]: #9 0x44bdbc in ipcp_up() at gatchat/ppp_ipcp.c:173
> ofonod[1808]: #10 0x44911d in pppcp_this_layer_up() at gatchat/ppp_cp.c:322
> ofonod[1808]: #11 0x449e5e in pppcp_generate_event() at gatchat/ppp_cp.c:690
> ofonod[1808]: #12 0x44a68b in pppcp_process_packet() at gatchat/ppp_cp.c:967
> ofonod[1808]: #13 0x447905 in ppp_receive() at gatchat/gatppp.c:224
> ofonod[1808]: #14 0x446994 in new_bytes() at gatchat/gathdlc.c:301
> ofonod[1808]: #15 0x43edf3 in received_data() at gatchat/gatio.c:124
> ofonod[1808]: #16 0x3368844a7d in /lib64/libglib-2.0.so.0
> ofonod[1808]: #17 0x3368845278 in /lib64/libglib-2.0.so.0
> ofonod[1808]: #18 0x33688457c5 in /lib64/libglib-2.0.so.0
> ofonod[1808]: #19 0x496c4e in main() at src/main.c:262
> ofonod[1808]: #20 0x336682169d in /lib64/libc.so.6
> ofonod[1808]: +++++++++++++++++++++++++++
>
>
> static void pri_activate_callback(const struct ofono_error *error, void *data)
> {
> [...]
>
> __ofono_dbus_pending_reply(&ctx->pending,
> dbus_message_new_method_return(ctx->pending));
>
> [...]
> }
>
> I guess ctx->pending is NULL.
>
Sounds like it, but this makes no sense; pending is set right above the
single instance of the driver operation with pri_activate_callback as
the callback. The only way for this to happen is if the callback is
being called twice or some other interesting circumstance...
Can you duplicate this reliably?
Regards,
-Denis
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: bug: NULL pointer access?
2012-01-05 15:40 ` Denis Kenzior
@ 2012-01-16 8:37 ` Daniel Wagner
0 siblings, 0 replies; 3+ messages in thread
From: Daniel Wagner @ 2012-01-16 8:37 UTC (permalink / raw)
To: ofono
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Hi Denis,
On 05.01.2012 16:40, Denis Kenzior wrote:
> Hi Daniel,
>
> On 01/05/2012 08:59 AM, Daniel Wagner wrote:
>> Hi,
>>
>> I just managed to get this backtrace:
>>
>> ofonod[1808]: ++++++++ backtrace ++++++++
>> ofonod[1808]: #0 0x3366c0f500 in /lib64/libpthread.so.0
>> ofonod[1808]: #1 0x3366836285 in /lib64/libc.so.6
>> ofonod[1808]: #2 0x3366837b9b in /lib64/libc.so.6
>> ofonod[1808]: #3 0x336982fd85 in /lib64/libdbus-1.so.3
>> ofonod[1808]: #4 0x3369826e31 in /lib64/libdbus-1.so.3
>> ofonod[1808]: #5 0x336981b806 in /lib64/libdbus-1.so.3
>> ofonod[1808]: #6 0x4db083 in pri_activate_callback() at src/gprs.c:871
>> ofonod[1808]: #7 0x4611cf in ppp_connect() at drivers/atmodem/gprs-context.c:101
>> ofonod[1808]: #8 0x447fdd in ppp_ipcp_up_notify() at gatchat/gatppp.c:415
>> ofonod[1808]: #9 0x44bdbc in ipcp_up() at gatchat/ppp_ipcp.c:173
>> ofonod[1808]: #10 0x44911d in pppcp_this_layer_up() at gatchat/ppp_cp.c:322
>> ofonod[1808]: #11 0x449e5e in pppcp_generate_event() at gatchat/ppp_cp.c:690
>> ofonod[1808]: #12 0x44a68b in pppcp_process_packet() at gatchat/ppp_cp.c:967
>> ofonod[1808]: #13 0x447905 in ppp_receive() at gatchat/gatppp.c:224
>> ofonod[1808]: #14 0x446994 in new_bytes() at gatchat/gathdlc.c:301
>> ofonod[1808]: #15 0x43edf3 in received_data() at gatchat/gatio.c:124
>> ofonod[1808]: #16 0x3368844a7d in /lib64/libglib-2.0.so.0
>> ofonod[1808]: #17 0x3368845278 in /lib64/libglib-2.0.so.0
>> ofonod[1808]: #18 0x33688457c5 in /lib64/libglib-2.0.so.0
>> ofonod[1808]: #19 0x496c4e in main() at src/main.c:262
>> ofonod[1808]: #20 0x336682169d in /lib64/libc.so.6
>> ofonod[1808]: +++++++++++++++++++++++++++
>>
>>
>> static void pri_activate_callback(const struct ofono_error *error, void *data)
>> {
>> [...]
>>
>> __ofono_dbus_pending_reply(&ctx->pending,
>> dbus_message_new_method_return(ctx->pending));
>>
>> [...]
>> }
>>
>> I guess ctx->pending is NULL.
>>
>
> Sounds like it, but this makes no sense; pending is set right above the
> single instance of the driver operation with pri_activate_callback as
> the callback. The only way for this to happen is if the callback is
> being called twice or some other interesting circumstance...
>
> Can you duplicate this reliably?
No, not really. I was playing around with a new USB stick and I somehow
managed to trigger this one. Unfortunately, I can't remember what I did.
The only thing I remember was I restarted both daemon a few times.
I guess we can't much about this one then.
cheers,
daniel
^ permalink raw reply [flat|nested] 3+ messages in thread
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2012-01-05 14:59 bug: NULL pointer access? Daniel Wagner
2012-01-05 15:40 ` Denis Kenzior
2012-01-16 8:37 ` Daniel Wagner
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