From: Johannes Berg <johannes@sipsolutions.net>
To: Avery Pennarun <apenwarr@gmail.com>
Cc: ath9k-devel <ath9k-devel@lists.ath9k.org>,
linux-wireless <linux-wireless@vger.kernel.org>,
Felix Fietkau <nbd@nbd.name>
Subject: Re: [PATCH] mac80211: debugfs var for the default aggregation timeout.
Date: Fri, 08 Apr 2016 09:01:49 +0200 [thread overview]
Message-ID: <1460098909.30678.2.camel@sipsolutions.net> (raw)
In-Reply-To: <1460098614.30678.1.camel@sipsolutions.net> (sfid-20160408_085710_192124_E4948ED0)
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
next prev parent reply other threads:[~2016-04-08 7:01 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-04 5:03 ath9k(?): AP stops sending traffic to iPhone 4S until another 802.11n-capable STA joins Avery Pennarun
2016-02-16 21:28 ` Avery Pennarun
2016-02-16 21:28 ` [PATCH] mac80211: debugfs var for the default aggregation timeout Avery Pennarun
2016-02-16 21:44 ` Johannes Berg
2016-02-17 2:05 ` Sujith Manoharan
2016-02-23 10:14 ` Johannes Berg
2016-02-23 18:43 ` Avery Pennarun
2016-02-23 20:05 ` Johannes Berg
2016-04-05 23:46 ` Avery Pennarun
2016-04-06 7:40 ` Johannes Berg
2016-04-08 1:32 ` Avery Pennarun
2016-04-08 6:56 ` Johannes Berg
2016-04-08 7:01 ` Johannes Berg [this message]
2016-04-08 7:15 ` Johannes Berg
2016-04-08 8:31 ` Avery Pennarun
2016-04-09 1:27 ` Avery Pennarun
2016-04-09 4:56 ` Johannes Berg
2016-04-10 0:31 ` Adrian Chadd
2016-04-10 1:59 ` bruce m beach
2016-04-19 1:29 ` Avery Pennarun
2016-02-16 22:05 ` ath9k(?): AP stops sending traffic to iPhone 4S until another 802.11n-capable STA joins Johannes Berg
2016-02-17 4:32 ` Avery Pennarun
2016-02-17 6:23 ` Krishna Chaitanya
2016-02-17 7:05 ` Avery Pennarun
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