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Message-ID: <f7cc450c-5a87-4ee3-ff35-e588d03da7d8@linux.intel.com>
Date: Fri, 26 Jul 2019 09:02:30 -0500
From: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To: Cezary Rojewski <cezary.rojewski@...el.com>
Cc: alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
tiwai@...e.de, broonie@...nel.org, vkoul@...nel.org,
gregkh@...uxfoundation.org, jank@...ence.com,
srinivas.kandagatla@...aro.org, slawomir.blauciak@...el.com,
Sanyog Kale <sanyog.r.kale@...el.com>
Subject: Re: [alsa-devel] [RFC PATCH 06/40] soundwire: intel: prevent possible
dereference in hw_params
>> diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
>> index 68832e613b1e..497879dd9c0d 100644
>> --- a/drivers/soundwire/intel.c
>> +++ b/drivers/soundwire/intel.c
>> @@ -509,7 +509,7 @@ static int intel_config_stream(struct sdw_intel *sdw,
>> struct snd_soc_dai *dai,
>> struct snd_pcm_hw_params *hw_params, int link_id)
>> {
>> - if (sdw->res->ops && sdw->res->ops->config_stream)
>> + if (sdw->res->ops && sdw->res->ops->config_stream && sdw->res->arg)
>> return sdw->res->ops->config_stream(sdw->res->arg,
>> substream, dai, hw_params, link_id);
>>
>
> Hmm, declaring local for sdw->res should prove useful here after
> addition of 4th sdw->res dereference.
yes, it's an eyesore. I added this to quickly fix a kernel oops while
debugging, will simplify. thanks for the note.
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