Re: [PATCH] media: atomisp: move the sanity checks before variable dereferences

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 





On 5/29/23 23:46, Hans de Goede wrote:
Hi,

On 5/29/23 17:21, Dongliang Mu wrote:
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>

Thank you for your patch, but the same patch has already been submitted
and merged into my media-atomisp branch about a week ago:

https://git.kernel.org/pub/scm/linux/kernel/git/hansg/linux.git/commit/?h=media-atomisp&id=c09907049eea9f12e959fb88c02a483a4c5eee89

I see. Thanks for your reply.


---
  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;



[Index of Archives]     [Linux Input]     [Video for Linux]     [Gstreamer Embedded]     [Mplayer Users]     [Linux USB Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [Yosemite Backpacking]

  Powered by Linux