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drm/vc4: cast calculation to __u64 in vc4_dumb_fixup_args()

Message ID 20241101152045.8469-1-zichenxie0106@gmail.com (mailing list archive)
State New, archived
Headers show
Series drm/vc4: cast calculation to __u64 in vc4_dumb_fixup_args() | expand

Commit Message

Gax-c Nov. 1, 2024, 3:20 p.m. UTC 
From: Zichen Xie <zichenxie0106@gmail.com>

Like commit b0b0d811eac6 ("drm/mediatek: Fix coverity issue with
unintentional integer overflow"), directly multiply args->pitch and
args->height may lead to integer overflow. Add a cast to avoid it.

Fixes: 3d7637423be8 ("drm/vc4: bo: Split out Dumb buffers fixup")
Signed-off-by: Zichen Xie <zichenxie0106@gmail.com>
---
 drivers/gpu/drm/vc4/vc4_drv.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
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Patch

diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c
index c133e96b8aca..ac02afc3acc5 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.c
+++ b/drivers/gpu/drm/vc4/vc4_drv.c
@@ -69,8 +69,8 @@  int vc4_dumb_fixup_args(struct drm_mode_create_dumb *args)
 	if (args->pitch < min_pitch)
 		args->pitch = min_pitch;
 
-	if (args->size < args->pitch * args->height)
-		args->size = args->pitch * args->height;
+	if (args->size < (__u64)args->pitch * args->height)
+		args->size = (__u64)args->pitch * args->height;
 
 	return 0;
 }