From: Larry Finger <Larry.Finger@lwfinger.net>
To: Johannes Berg <johannes@sipsolutions.net>
Cc: mcgrof@do-not-panic.com, linux-wireless <linux-wireless@vger.kernel.org>
Subject: Re: Memory leak in cfg80211
Date: Mon, 04 Feb 2013 11:43:48 -0600 [thread overview]
Message-ID: <510FF354.7000208@lwfinger.net> (raw)
In-Reply-To: <1359998652.17993.9.camel@jlt4.sipsolutions.net>
On 02/04/2013 11:24 AM, Johannes Berg wrote:
Johannes,
>
> Yeah. The more interesting part (I think) is reg_todo(), which seems it
> really is the __regulatory_hint() function, which gets inlined.
>
> Were you able to reproduce this? I don't think I can since my devices
> (Intel) don't use wiphy->regd. If you can, maybe you could try to
> dump_stack() with the pointer every time wiphy->regd gets assigned, and
> also print the old value.
Yes, it is reproducible. I get one for every load of ath9k_htc. Other drivers
may also fail - that happens to be the device I'm using now.
> To me, this looks like wiphy->regd gets overwritten without freeing the
> old value, but I don't see what recent (since 3.7) change should have
> caused this to change behaviour. Luis?
I'll set that up and report back.
Larry
next prev parent reply other threads:[~2013-02-04 17:43 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-02 23:17 Memory leak in cfg80211 Larry Finger
2013-02-04 17:24 ` Johannes Berg
2013-02-04 17:43 ` Larry Finger [this message]
2013-02-04 19:31 ` Larry Finger
2013-02-04 20:56 ` Johannes Berg
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