On 10/7/25 8:45 AM, Thomas Zimmermann wrote:
Hi
Am 23.09.25 um 10:51 schrieb Mehdi Ben Hadj Khelifa:
Replace kmalloc with kmalloc array in drm/gud/gud_pipe.c since the
calculation inside kmalloc is dynamic 'width * height' to avoid
overflow.
Signed-off-by: Mehdi Ben Hadj Khelifa <[email protected]>
---
Changelog:
Changes since v1:
- Use of width as element count and height as size of element to
eliminate the mentionned calculation and overflow issues.
drivers/gpu/drm/gud/gud_pipe.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/gud/gud_pipe.c b/drivers/gpu/drm/gud/
gud_pipe.c
index 8d548d08f127..8898dc9393fb 100644
--- a/drivers/gpu/drm/gud/gud_pipe.c
+++ b/drivers/gpu/drm/gud/gud_pipe.c
@@ -70,7 +70,7 @@ static size_t gud_xrgb8888_to_r124(u8 *dst, const
struct drm_format_info *format
height = drm_rect_height(rect);
len = drm_format_info_min_pitch(format, 0, width) * height;
- buf = kmalloc(width * height, GFP_KERNEL);
+ buf = kmalloc_array(width, height, GFP_KERNEL);
One nitpick here: the first parameter is the number of elements and the
second parameter is the size of an individual element. [1] So the
arguments 'width' and 'height' should be reversed. Please resubmit.
Understood,I will be sending v3 shortly.
Best regards
Thomas
Best Regards,
Mehdi
[1] https://elixir.bootlin.com/linux/v6.17.1/source/tools/include/linux/
slab.h#L15
if (!buf)
return 0;
