AP mode crash

AP mode crash

[Daniel Wagner]

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Hi,

While playing with the AP mode I triggered following crash:


AP Probe Request from 30:4b:07:ee:49:8d
AP Probe Response sent OK
src/netdev.c:netdev_unicast_notify() Unicast notification 59
AP Probe Request from 30:4b:07:ee:49:8d
src/netdev.c:netdev_unicast_notify() Unicast notification 59
AP Probe Request from 30:4b:07:ee:49:8d
src/netdev.c:netdev_link_notify() event 16 on ifindex 8
src/agent.c:agent_unregister() agent unregister
src/agent.c:agent_free() agent free 0xde6820
src/netdev.c:netdev_mlme_notify() MLME notification Stop AP(16)
src/netdev.c:netdev_link_notify() event 16 on ifindex 8
src/netdev.c:netdev_bridge_port_event() netdev: 8 added to bridge: 9
src/netdev.c:netdev_link_notify() event 16 on ifindex 2
src/netdev.c:netdev_link_notify() event 16 on ifindex 9
src/netdev.c:netdev_link_notify() event 16 on ifindex 8
src/netdev.c:netdev_link_notify() event 16 on ifindex 8
src/netdev.c:netdev_bridge_port_event() netdev: 8 added to bridge: 9
src/netdev.c:netdev_link_notify() event 17 on ifindex 8
src/netdev.c:netdev_bridge_port_event() netdev: 8 removed from bridge: 9
src/netdev.c:netdev_link_notify() event 16 on ifindex 8
src/netdev.c:netdev_link_notify() event 17 on ifindex 9
src/netdev.c:netdev_link_notify() event 16 on ifindex 2
src/agent.c:agent_register() agent register called
src/agent.c:agent_register() agent :1.83 path /net/connman/iwd_agent
src/netdev.c:netdev_link_notify() event 16 on ifindex 8
src/netdev.c:netdev_unicast_notify() Unicast notification 59
AP Probe Request from 30:4b:07:ee:49:8d
src/netdev.c:netdev_unicast_notify() Unicast notification 59
AP Probe Request from 30:4b:07:ee:49:8d
src/netdev.c:netdev_unicast_notify() Unicast notification 59
AP Probe Request from 30:4b:07:ee:49:8d
Aborting (signal 11) [/home/wagi/prj/connman/iwd/src/iwd]
++++++++ backtrace ++++++++
#0  0x7fc63e910030 in /lib64/libc.so.6
#1  0x7fc63ea35891 in /lib64/libc.so.6
#2  0x43ad5e in ap_probe_req_cb() at src/ap.c:1100 (discriminator 1)
#3  0x45435a in frame_watch_unicast_notify() at src/frame-xchg.c:184 
(discriminator 6)
#4  0x4818c3 in dispatch_unicast_watches() at ell/genl.c:899
#5  0x48197b in process_unicast() at ell/genl.c:919
#6  0x481d21 in received_data() at ell/genl.c:1035
#7  0x47cfea in io_callback() at ell/io.c:126
#8  0x47baf8 in l_main_iterate() at ell/main.c:473
#9  0x47bbff in l_main_run() at ell/main.c:516
#10 0x47bf17 in l_main_run_with_signal() at ell/main.c:642
#11 0x404a36 in main() at src/main.c:497
#12 0x7fc63e8fae0b in /lib64/libc.so.6
+++++++++++++++++++++++++++

What I did was, enabling WiFi tethering in ConnMan, terminate ConnMan 
(this tells iwd to shutdown the connection) and restart ConnMan again. 
ConnMan then tries to restore the old setup, starting the AP mode.

Haven't really debugged it yet. Maybe someone spots the problem more 
easily than I do :)

Thanks,
Daniel

Re: AP mode crash

[Denis Kenzior]

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Hi Daniel,

> #0  0x7fc63e910030 in /lib64/libc.so.6
> #1  0x7fc63ea35891 in /lib64/libc.so.6
> #2  0x43ad5e in ap_probe_req_cb() at src/ap.c:1100 (discriminator 1)
> #3  0x45435a in frame_watch_unicast_notify() at src/frame-xchg.c:184 
> (discriminator 6)
> #4  0x4818c3 in dispatch_unicast_watches() at ell/genl.c:899
> #5  0x48197b in process_unicast() at ell/genl.c:919
> #6  0x481d21 in received_data() at ell/genl.c:1035
> #7  0x47cfea in io_callback() at ell/io.c:126
> #8  0x47baf8 in l_main_iterate() at ell/main.c:473
> #9  0x47bbff in l_main_run() at ell/main.c:516
> #10 0x47bf17 in l_main_run_with_signal() at ell/main.c:642
> #11 0x404a36 in main() at src/main.c:497
> #12 0x7fc63e8fae0b in /lib64/libc.so.6
> +++++++++++++++++++++++++++
> 
> What I did was, enabling WiFi tethering in ConnMan, terminate ConnMan 
> (this tells iwd to shutdown the connection) and restart ConnMan again. 
> ConnMan then tries to restore the old setup, starting the AP mode.
> 
> Haven't really debugged it yet. Maybe someone spots the problem more 
> easily than I do :)
> 

I'm guessing Andrew's patches (applied upstream) that came in a few 
hours after this report fixed this issue?

Regards,
-Denis

Re: AP mode crash

[Daniel Wagner]

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> I'm guessing Andrew's patches (applied upstream) that came in a few hours
> after this report fixed this issue?

I was testing with 1.4-35-g0508879e2a64 this morning. Now with
1.4-43-gfff6c97e996e the crash is gone.

Thanks for fixing it!
Daniel