linux-kernel - Re: [PATCH] rsi: Fix failure to load firmware after memory leak fix and fix the leak

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <55B718D1.2030803@topic.nl>
Date:	Tue, 28 Jul 2015 07:53:21 +0200
From:	Mike Looijmans <mike.looijmans@...ic.nl>
To:	Kalle Valo <kvalo@...eaurora.org>
CC:	<linux-wireless@...r.kernel.org>, <khoroshilov@...ras.ru>,
	<netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<stable@...r.kernel.org>
Subject: Re: [PATCH] rsi: Fix failure to load firmware after memory leak fix
 and fix the leak

On 27-07-15 12:28, Kalle Valo wrote:
> Mike Looijmans <mike.looijmans@...ic.nl> writes:
>
>> Fixes commit eae79b4f3e82ca63a53478a161b190a0d38fe526 ("rsi: fix memory leak
>> in rsi_load_ta_instructions()") which stopped the driver from functioning.
>
> You can abbreviate the commit id:
>
> Fixes commit eae79b4f3e82 ("rsi: fix memory leak in
> rsi_load_ta_instructions()") which stopped the driver from functioning.
>
>> Firmware data has been allocated using vmalloc(), resulting in memory
>> that cannot be used for DMA. Hence the firmware was first copied to a
>> buffer allocated with kmalloc() in the original code. This patch reverts
>> the commit and only calls "kfree()" to release the buffer after sending
>> the data. This fixes the memory leak without breaking the driver.
>>
>> Add a comment to the kmemdup() calls to explain why this is done.
>>
>> Tested on a Topic Miami-Florida board which contains the rsi SDIO chip.
>>
>> Also added the same kfree() call to the USB glue driver. This was not
>> tested on actual hardware though, as I only have the SDIO version.
>>
>> Signed-off-by: Mike Looijmans <mike.looijmans@...ic.nl>
>
> Add this before Signed-off-by line:
>
> Fixes: eae79b4f3e82 ("rsi: fix memory leak in rsi_load_ta_instructions()")
>
>> Cc: stable@...r.kernel.org
>
> Also no need to send email to stable@...r.kernel.org list, this line is
> enough and the stable team will pick the commit automatically.

I wondered why that happened, and just noticed that git send-email 
automatically added this to the recipients. So it happened for v2 as well, 
sorry for that.



Kind regards,

Mike Looijmans
System Expert

TOPIC Embedded Products
Eindhovenseweg 32-C, NL-5683 KH Best
Postbus 440, NL-5680 AK Best
Telefoon: +31 (0) 499 33 69 79
Telefax: +31 (0) 499 33 69 70
E-mail: mike.looijmans@...icproducts.com
Website: www.topicproducts.com

Please consider the environment before printing this e-mail





--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/