Smatch reports:
sh_css_load_firmware() warn: variable dereferenced before check 'fw_data'
The variable fw_data can be NULL in sh_css_load_firmware, resulting in
NULL pointer dereference.
Fix this by moving the sanity checks before variable dereferences.
Signed-off-by: Dongliang Mu <dzm91@xxxxxxxxxxx>
---
drivers/staging/media/atomisp/pci/sh_css_firmware.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/staging/media/atomisp/pci/sh_css_firmware.c b/drivers/staging/media/atomisp/pci/sh_css_firmware.c
index e7ef578db8ab..38b757c3df0a 100644
--- a/drivers/staging/media/atomisp/pci/sh_css_firmware.c
+++ b/drivers/staging/media/atomisp/pci/sh_css_firmware.c
@@ -229,6 +229,10 @@ sh_css_load_firmware(struct device *dev, const char *fw_data,
struct sh_css_fw_bi_file_h *file_header;
int ret;
+ /* some sanity checks */
+ if (!fw_data || fw_size < sizeof(struct sh_css_fw_bi_file_h))
+ return -EINVAL;
+
firmware_header = (struct firmware_header *)fw_data;
file_header = &firmware_header->file_header;
binaries = &firmware_header->binary_header;
@@ -243,10 +247,6 @@ sh_css_load_firmware(struct device *dev, const char *fw_data,
IA_CSS_LOG("successfully load firmware version %s", release_version);
}
- /* some sanity checks */
- if (!fw_data || fw_size < sizeof(struct sh_css_fw_bi_file_h))
- return -EINVAL;
-
if (file_header->h_size != sizeof(struct sh_css_fw_bi_file_h))
return -EINVAL;
--
2.34.1
