diff mbox series

[v3,5/9] platform/x86/intel/ifs: Validate image size

Message ID 20230929202436.2850388-6-jithu.joseph@intel.com
State New
Headers
Series IFS support for GNR and SRF |

Commit Message

Jithu Joseph Sept. 29, 2023, 8:24 p.m. UTC 
  Perform additional validation prior to loading IFS image.

Error out if the size of the file being loaded doesn't match the size
specified in the header.

Signed-off-by: Jithu Joseph <jithu.joseph@intel.com>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Tested-by: Pengfei Xu <pengfei.xu@intel.com>
---
 drivers/platform/x86/intel/ifs/load.c | 8 ++++++++
 1 file changed, 8 insertions(+)

Comments

Ilpo Järvinen Oct. 2, 2023, 11:45 a.m. UTC | #1 
On Fri, 29 Sep 2023, Jithu Joseph wrote:

> Perform additional validation prior to loading IFS image.
> 
> Error out if the size of the file being loaded doesn't match the size
> specified in the header.
> 
> Signed-off-by: Jithu Joseph <jithu.joseph@intel.com>
> Reviewed-by: Tony Luck <tony.luck@intel.com>
> Tested-by: Pengfei Xu <pengfei.xu@intel.com>
> ---
>  drivers/platform/x86/intel/ifs/load.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/drivers/platform/x86/intel/ifs/load.c b/drivers/platform/x86/intel/ifs/load.c
> index 6b827247945b..da54fd060878 100644
> --- a/drivers/platform/x86/intel/ifs/load.c
> +++ b/drivers/platform/x86/intel/ifs/load.c
> @@ -375,6 +375,7 @@ int ifs_load_firmware(struct device *dev)
>  {
>  	const struct ifs_test_caps *test = ifs_get_test_caps(dev);
>  	struct ifs_data *ifsd = ifs_get_data(dev);
> +	unsigned int expected_size;
>  	const struct firmware *fw;
>  	char scan_path[64];
>  	int ret = -EINVAL;
> @@ -389,6 +390,13 @@ int ifs_load_firmware(struct device *dev)
>  		goto done;
>  	}
>  
> +	expected_size = ((struct microcode_header_intel *)fw->data)->totalsize;
> +	if (fw->size != expected_size) {
> +		dev_err(dev, "File size mismatch (expected %d, actual %ld). Corrupted IFS image.\n",
> +			expected_size, fw->size);
> +		return -EINVAL;
> +	}
> +
>  	ret = image_sanity_check(dev, (struct microcode_header_intel *)fw->data);
>  	if (ret)
>  		goto release;
> 

Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Ilpo Järvinen Oct. 2, 2023, 11:50 a.m. UTC | #2 
On Mon, 2 Oct 2023, Ilpo Järvinen wrote:

> On Fri, 29 Sep 2023, Jithu Joseph wrote:
> 
> > Perform additional validation prior to loading IFS image.
> > 
> > Error out if the size of the file being loaded doesn't match the size
> > specified in the header.
> > 
> > Signed-off-by: Jithu Joseph <jithu.joseph@intel.com>
> > Reviewed-by: Tony Luck <tony.luck@intel.com>
> > Tested-by: Pengfei Xu <pengfei.xu@intel.com>
> > ---
> >  drivers/platform/x86/intel/ifs/load.c | 8 ++++++++
> >  1 file changed, 8 insertions(+)
> > 
> > diff --git a/drivers/platform/x86/intel/ifs/load.c b/drivers/platform/x86/intel/ifs/load.c
> > index 6b827247945b..da54fd060878 100644
> > --- a/drivers/platform/x86/intel/ifs/load.c
> > +++ b/drivers/platform/x86/intel/ifs/load.c
> > @@ -375,6 +375,7 @@ int ifs_load_firmware(struct device *dev)
> >  {
> >  	const struct ifs_test_caps *test = ifs_get_test_caps(dev);
> >  	struct ifs_data *ifsd = ifs_get_data(dev);
> > +	unsigned int expected_size;
> >  	const struct firmware *fw;
> >  	char scan_path[64];
> >  	int ret = -EINVAL;
> > @@ -389,6 +390,13 @@ int ifs_load_firmware(struct device *dev)
> >  		goto done;
> >  	}
> >  
> > +	expected_size = ((struct microcode_header_intel *)fw->data)->totalsize;
> > +	if (fw->size != expected_size) {
> > +		dev_err(dev, "File size mismatch (expected %d, actual %ld). Corrupted IFS image.\n",
> > +			expected_size, fw->size);
> > +		return -EINVAL;
> > +	}
> > +
> >  	ret = image_sanity_check(dev, (struct microcode_header_intel *)fw->data);
> >  	if (ret)
> >  		goto release;
> > 
> 
> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

Just after sending the rev-by, I realized this also has %d vs unsigned int
problem, and %ld should be using %zu as fw->size of size_t.

Feel free to add my rev-by after those two problems have been fixed.
Jithu Joseph Oct. 2, 2023, 10:56 p.m. UTC | #3 
On 10/2/2023 4:50 AM, Ilpo Järvinen wrote:
> On Mon, 2 Oct 2023, Ilpo Järvinen wrote:

>> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
> 
> Just after sending the rev-by, I realized this also has %d vs unsigned int
> problem, and %ld should be using %zu as fw->size of size_t.
> 
> Feel free to add my rev-by after those two problems have been fixed.
> 

Thanks for the review. I will make this change

Jithu
diff mbox series

Patch

diff --git a/drivers/platform/x86/intel/ifs/load.c b/drivers/platform/x86/intel/ifs/load.c
index 6b827247945b..da54fd060878 100644
--- a/drivers/platform/x86/intel/ifs/load.c
+++ b/drivers/platform/x86/intel/ifs/load.c
@@ -375,6 +375,7 @@  int ifs_load_firmware(struct device *dev)
 {
 	const struct ifs_test_caps *test = ifs_get_test_caps(dev);
 	struct ifs_data *ifsd = ifs_get_data(dev);
+	unsigned int expected_size;
 	const struct firmware *fw;
 	char scan_path[64];
 	int ret = -EINVAL;
@@ -389,6 +390,13 @@  int ifs_load_firmware(struct device *dev)
 		goto done;
 	}
 
+	expected_size = ((struct microcode_header_intel *)fw->data)->totalsize;
+	if (fw->size != expected_size) {
+		dev_err(dev, "File size mismatch (expected %d, actual %ld). Corrupted IFS image.\n",
+			expected_size, fw->size);
+		return -EINVAL;
+	}
+
 	ret = image_sanity_check(dev, (struct microcode_header_intel *)fw->data);
 	if (ret)
 		goto release;