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Re: Cpu stall caused by hostapd running two interfaces

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dmesg for 4.18.1

https://pastebin.com/uPqRvU0F

2018-08-19 18:09 GMT+02:00 Grzegorz Duszyński <gfduszynski@xxxxxxxxx>:
> Hi,
>
> I've updated the kernel to 4.18.1 and then followed the instructions
> (I've checked and 0x6e did not changed)
> Here is the gdb output:
>
> (gdb) l *(ieee80211_regulatory_limit_wmm_params+0x6e)
> 0x110e is in ieee80211_regulatory_limit_wmm_params (net/mac80211/util.c:1151).
> 1146
> 1147            if (sdata->vif.type == NL80211_IFTYPE_AP)
> 1148                    wmm_ac = &rrule->wmm_rule->ap[ac];
> 1149            else
> 1150                    wmm_ac = &rrule->wmm_rule->client[ac];
> 1151            qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
> 1152            qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
> 1153            qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
> 1154            qparam->txop = !qparam->txop ? wmm_ac->cot / 32 :
> 1155                    min_t(u16, qparam->txop, wmm_ac->cot / 32);
> (gdb)
>
> 2018-08-14 7:14 GMT+02:00 Stanislaw Gruszka <sgruszka@xxxxxxxxxx>:
>> On Mon, Aug 13, 2018 at 08:48:17PM +0200, Grzegorz Duszyński wrote:
>>> Can I help you somehow with this ?
>>
>> Enable CONFIG_DEBUG_INFO=y in .config if not done already.
>> Then do:
>>
>> make net/mac80211/util.o
>> gdb net/mac80211/util.o
>> l *(ieee80211_regulatory_limit_wmm_params+0x6e)
>>
>> and provide output of gdb l command, this should show code
>> line number where oops occurs.
>>
>> Thanks
>> Stanislaw




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