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Error #41

tancat

The bmxd crashes when the link_window_size parameter is set to 1.

Afegit per Simó Albert i Beltran fa casi 13 anys. Actualitzat fa casi 13 anys.

Estat:
Tancat
Prioritat:
Normal
Assignat a:
Simó Albert i Beltran
Versió prevista:
-
Inici:
24-05-2011
Data de venciment:
% realitzat:

100%

Temps previst:
Temps invertit:
5:00 h

Descripció


# bmxd -d3 &  sleep 5 && bmxd -c --link_window_size 1

[...]

[19751     5017] INFO  bmx_save_config(): link_window_size p:1 c:1
[19751     5017] INFO  uci_save_option(): bmx.general.link_window_size=1
[19751     5017] INFO  --link_window_size        1                             
[19751     5192] INFO  get_lndev(): creating new lndev       172.22.0.14   ath0:bmx 172.22.0.16
[1]+  Floating point exception   bmxd -d3
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 #1

Actualitzat per Simó Albert i Beltran fa casi 13 anys

  • Estat ha canviat de En progrés a Resolt
  • % realitzat ha canviat de 0 a 100
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 #2

Actualitzat per Simó Albert i Beltran fa casi 13 anys

  • Estat ha canviat de Resolt a Tancat

The link_window_size parameter is specified in the ARG_LWS constant (line 40 of originator.h).

The link_window_size parameter is saved to local_lws variable (line 2046 of originator.c).

The value of local_lws variable is passed to update_lounged_metric function (line 803 of originator.c).

The update_lounged_metric funtion gets this value as ws variable (line 39 of mectrics.c).

In update_lounged_metric funtion this value is divided by 2 and saved as a integer on m_weight variable (line 53 of metrics.c).

If link_window_size is 1, the value of m_weight is 0.

This value is used to divide in line 63 of metrics.c.

This divison by zero causes a floating point exception.

To solve this problem, the patch added in 4c69c998322fcd3e896c4718b5a3e632efffbd84 increase the minium value of the link_window_size parameter to 2.

Reported bug to upstream with `this ticket`:http://www.bmx6.net/issues/2.

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