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Re: Memory leak in mwifiex_cfg80211_scan

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Hi,

On Mon, Apr 22, 2013 at 7:50 PM, Bing Zhao <bzhao@xxxxxxxxxxx> wrote:
> Thanks for reporting this issue.
> Please find attached the patch and try it on your XO4.
>
> I will resend the patch to the list if it works for you.

This does seem to make the kmemleak report go away.

However, strangely, it seems to make a whole bunch of kmemleak reports
*appear*, as if the struct netdev is not being destroyed, and more. I
guess this could just be a kmemleak oddity but it is strange that it
did not appear before this patch.

Trying to look for possible causes (memory corruption?), I can't see
any code that serializes scan_delay_timer_fn with mwifiex_close(), so
mwifiex_close freeing the scan data while scan_delay_timer_fn is using
it could cause badness to happen. However I haven't yet figured out
how to trigger scan_delay_timer_fn to execute even once (any tips?).

The fact that scan_delay_timer_fn isn't executing at all means that
its not related to the kmemleak oddness, which must have another cause
or explanation.

I will investigate more tomorrow.

Thanks
Daniel
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