diff mbox series

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

Message ID 20231004185607.3028392-1-jithu.joseph@intel.com (mailing list archive)
State Superseded, archived
Headers show
Series None | expand

Commit Message

Joseph, Jithu Oct. 4, 2023, 6:56 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>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Tested-by: Pengfei Xu <pengfei.xu@intel.com>
---
  - changed the dev_err printk format specifiers (Ilpo Järvinen)

 drivers/platform/x86/intel/ifs/load.c | 8 ++++++++
 1 file changed, 8 insertions(+)
diff mbox series

Patch

diff --git a/drivers/platform/x86/intel/ifs/load.c b/drivers/platform/x86/intel/ifs/load.c
index 6b827247945b..582f1801aaaa 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 %u, actual %zu). 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;