[alsa-devel] [PATCH] ASoC: Intel: mrfld: fix uninitialized variable access
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 --- 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 27413ebae956..b8c456753f01 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);
On 11/3/18 4:21 PM, Arnd Bergmann wrote:
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.
yes indeed, good catch.
Acked-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com
Fixes: 9012c9544eea ("ASoC: Intel: mrfld - Add DSP load and management") Signed-off-by: Arnd Bergmann arnd@arndb.de
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 27413ebae956..b8c456753f01 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);
The patch
ASoC: Intel: mrfld: fix uninitialized variable access
has been applied to the asoc tree at
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git
All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.
You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed.
If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced.
Please add any relevant lists and maintainers to the CCs when replying to this mail.
Thanks, Mark
From 1539c7f23f256120f89f8b9ec53160790bce9ed2 Mon Sep 17 00:00:00 2001
From: Arnd Bergmann arnd@arndb.de Date: Sat, 3 Nov 2018 22:21:22 +0100 Subject: [PATCH] ASoC: Intel: mrfld: fix uninitialized variable access
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 --- 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 27413ebae956..b8c456753f01 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);
participants (3)
-
Arnd Bergmann -
Mark Brown -
Pierre-Louis Bossart