[ath9k-devel] [PATCH] mac80211: debugfs var for the default aggregation timeout.

On Fri, 2016-04-08 at 08:56 +0200, Johannes Berg wrote:
> On Thu, 2016-04-07 at 21:32 -0400, Avery Pennarun wrote:
> 
> > 
> > Yes.??Here it is:
> > http://apenwarr.ca/tmp/mac80211-agg-status-crash.ko
> > 
> Unfortunately there are no debug symbols in this file, so it doesn't
> help me much. I can't even seem to get objdump to disassemble it
> correctly: looks like the file is in thumb, going from things
> like?R_ARM_THM_CALL relocations, but even -Mforce-thumb doesn't seem
> to DRT; sta_agg_status_read+0xeb isn't even a valid instruction
> offset in regular ARM mode.
> 

It *seems* that it most likely crashes on the first access to tid_tx,
which is consistent with the story of disabling TX aggregation timeouts
reducing the chances.

So I guess we have to look for some TX aggregation teardown RCU pointer
problem?

johannes