lkml.org 
[lkml]   [2019]   [Feb]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 4.9 003/137] ASoC: Intel: mrfld: fix uninitialized variable access
Date
4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

[ Upstream commit 1539c7f23f256120f89f8b9ec53160790bce9ed2 ]

Randconfig testing revealed a very old bug, with gcc-8:

sound/soc/intel/atom/sst/sst_loader.c: In function 'sst_load_fw':
sound/soc/intel/atom/sst/sst_loader.c:357:5: error: 'fw' may be used uninitialized in this function [-Werror=maybe-uninitialized]
if (fw == NULL) {
^
sound/soc/intel/atom/sst/sst_loader.c:354:25: note: 'fw' was declared here
const struct firmware *fw;

We must check the return code of request_firmware() before we look at the
pointer result that may be uninitialized when the function fails.

Fixes: 9012c9544eea ("ASoC: Intel: mrfld - Add DSP load and management")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
sound/soc/intel/atom/sst/sst_loader.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/sound/soc/intel/atom/sst/sst_loader.c b/sound/soc/intel/atom/sst/sst_loader.c
index 33917146d9c4..054b1d514e8a 100644
--- a/sound/soc/intel/atom/sst/sst_loader.c
+++ b/sound/soc/intel/atom/sst/sst_loader.c
@@ -354,14 +354,14 @@ static int sst_request_fw(struct intel_sst_drv *sst)
const struct firmware *fw;

retval = request_firmware(&fw, sst->firmware_name, sst->dev);
- if (fw == NULL) {
- dev_err(sst->dev, "fw is returning as null\n");
- return -EINVAL;
- }
if (retval) {
dev_err(sst->dev, "request fw failed %d\n", retval);
return retval;
}
+ if (fw == NULL) {
+ dev_err(sst->dev, "fw is returning as null\n");
+ return -EINVAL;
+ }
mutex_lock(&sst->sst_lock);
retval = sst_cache_and_parse_fw(sst, fw);
mutex_unlock(&sst->sst_lock);
--
2.19.1


\
 
 \ /
  Last update: 2019-02-11 16:22    [W:0.361 / U:6.808 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site