6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Zhipeng Lu <alexious@xxxxxxxxxx>
[ Upstream commit 3b621e9e9e148c0928ab109ac3d4b81487469acb ]
The allocation failure of mycs->yuv_scaler_binary in load_video_binaries()
is followed with a dereference of mycs->yuv_scaler_binary after the
following call chain:
sh_css_pipe_load_binaries()
|-> load_video_binaries(mycs->yuv_scaler_binary == NULL)
|
|-> sh_css_pipe_unload_binaries()
|-> unload_video_binaries()
In unload_video_binaries(), it calls to ia_css_binary_unload with argument
&pipe->pipe_settings.video.yuv_scaler_binary[i], which refers to the
same memory slot as mycs->yuv_scaler_binary. Thus, a null-pointer
dereference is triggered.
Link: https://lore.kernel.org/r/20240118151303.3828292-1-alexious@xxxxxxxxxx
Fixes: a49d25364dfb ("staging/atomisp: Add support for the Intel IPU v2")
Signed-off-by: Zhipeng Lu <alexious@xxxxxxxxxx>
Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/staging/media/atomisp/pci/sh_css.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/staging/media/atomisp/pci/sh_css.c b/drivers/staging/media/atomisp/pci/sh_css.c
index 4b3fa6d93fe0a..d8a1d4a58db6a 100644
--- a/drivers/staging/media/atomisp/pci/sh_css.c
+++ b/drivers/staging/media/atomisp/pci/sh_css.c
@@ -4737,6 +4737,7 @@ static int load_video_binaries(struct ia_css_pipe *pipe)
sizeof(struct ia_css_binary),
GFP_KERNEL);
if (!mycs->yuv_scaler_binary) {
+ mycs->num_yuv_scaler = 0;
err = -ENOMEM;
return err;
}
--
2.43.0
