linux-kernel - Re: [irda-users] [PATCH] irlmp_unregister

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Message-ID: <47131A0B.1050000@cetrtapot.si>
Date:	Mon, 15 Oct 2007 09:43:07 +0200
From:	"hinko.kocevar@...rtapot.si" <hinko.kocevar@...rtapot.si>
To:	Samuel Ortiz <samuel@...tiz.org>
Cc:	irda-users@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: [irda-users] [PATCH] irlmp_unregister_link needs to free lsaps
 hashbin

Samuel Ortiz wrote:
> Hi Hinko,
> 
> On Fri, Oct 12, 2007 at 02:56:27PM +0200, hinko.kocevar@...rtapot.si wrote:
>> Hi,
>>
>> While testing the mcs7780 based IrDA USB dongle I've stumbled upon
>> memory leak in irlmp_unregister_link(). Hashbin for lsaps is created in
>> irlmp_register_link and should probably be freed in irlmp_unregister_link().
>>
>> Signed-off-by: Hinko Kocevar <hinko.kocevar@...rtapot.si>
>>
>> Best regards,
>> Hinko
>>
>> ----
>>
>>
> 
>> --- linux-2.6.23/net/irda/irlmp.c.orig	2007-10-12 14:05:17.000000000 +0200
>> +++ linux-2.6.23/net/irda/irlmp.c	2007-10-12 14:05:41.000000000 +0200
>> @@ -353,6 +353,7 @@ void irlmp_unregister_link(__u32 saddr)
>>  		/* Final cleanup */
>>  		del_timer(&link->idle_timer);
>>  		link->magic = 0;
>> +		hashbin_delete(link->lsaps, (FREE_FUNC) kfree);
> Good catch, but I think the right fix sould be:
> +             hashbin_delete(link->lsaps, (FREE_FUNC) __irlmp_close_lsap);
> 

You're probably right since struct lsap_cb get inserted into the hashbin.

Regards,
Hinko

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