linux-kernel - [PATCH] ASoC: Intel: avoid format string leak to thread name

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Message-ID: <20140522184355.GA8301@www.outflux.net>
Date:	Thu, 22 May 2014 11:43:55 -0700
From:	Kees Cook <keescook@...omium.org>
To:	linux-kernel@...r.kernel.org
Cc:	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>,
	Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
	Wenkai Du <wenkai.du@...el.com>,
	Dan Carpenter <dan.carpenter@...cle.com>,
	Christian Engelmayer <cengelma@....at>,
	alsa-devel@...a-project.org
Subject: [PATCH] ASoC: Intel: avoid format string leak to thread name

This makes sure a format string can never get processed into the worker
thread name from the device name.

Signed-off-by: Kees Cook <keescook@...omium.org>
---
 sound/soc/intel/sst-baytrail-ipc.c |    2 +-
 sound/soc/intel/sst-haswell-ipc.c  |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/intel/sst-baytrail-ipc.c b/sound/soc/intel/sst-baytrail-ipc.c
index 0d31dbbf4806..1b25bf168beb 100644
--- a/sound/soc/intel/sst-baytrail-ipc.c
+++ b/sound/soc/intel/sst-baytrail-ipc.c
@@ -809,7 +809,7 @@ int sst_byt_dsp_init(struct device *dev, struct sst_pdata *pdata)
 	/* start the IPC message thread */
 	init_kthread_worker(&byt->kworker);
 	byt->tx_thread = kthread_run(kthread_worker_fn,
-				     &byt->kworker,
+				     &byt->kworker, "%s",
 				     dev_name(byt->dev));
 	if (IS_ERR(byt->tx_thread)) {
 		err = PTR_ERR(byt->tx_thread);
diff --git a/sound/soc/intel/sst-haswell-ipc.c b/sound/soc/intel/sst-haswell-ipc.c
index e7996b39a484..a8fd60c67341 100644
--- a/sound/soc/intel/sst-haswell-ipc.c
+++ b/sound/soc/intel/sst-haswell-ipc.c
@@ -1735,7 +1735,7 @@ int sst_hsw_dsp_init(struct device *dev, struct sst_pdata *pdata)
 	/* start the IPC message thread */
 	init_kthread_worker(&hsw->kworker);
 	hsw->tx_thread = kthread_run(kthread_worker_fn,
-					   &hsw->kworker,
+					   &hsw->kworker, "%s",
 					   dev_name(hsw->dev));
 	if (IS_ERR(hsw->tx_thread)) {
 		ret = PTR_ERR(hsw->tx_thread);
-- 
1.7.9.5


-- 
Kees Cook
Chrome OS Security
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