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drm/vc4: hdmi: Fixed possible integer overflow
author
Saud Farooqui
<farooqui_saud@hotmail.com>
Thu, 9 Jun 2022 18:50:31 +0000
(23:50 +0500)
committer
Maxime Ripard
<maxime@cerno.tech>
Wed, 22 Jun 2022 07:30:17 +0000
(09:30 +0200)
Multiplying ints and saving it in unsigned long long
could lead to integer overflow before being type casted to
unsigned long long.
Addresses-Coverity: 1505113: Unintentional integer overflow.
Signed-off-by: Saud Farooqui <farooqui_saud@hotmail.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link:
https://patchwork.freedesktop.org/patch/msgid/PA4P189MB1421E63C0FF3EBF234A80AB38BA79@PA4P189MB1421.EURP189.PROD.OUTLOOK.COM
drivers/gpu/drm/vc4/vc4_hdmi.c
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diff --git
a/drivers/gpu/drm/vc4/vc4_hdmi.c
b/drivers/gpu/drm/vc4/vc4_hdmi.c
index
823d812
..
ce9d166
100644
(file)
--- a/
drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/
drivers/gpu/drm/vc4/vc4_hdmi.c
@@
-1481,7
+1481,7
@@
vc4_hdmi_encoder_compute_mode_clock(const struct drm_display_mode *mode,
unsigned int bpc,
enum vc4_hdmi_output_format fmt)
{
- unsigned long long clock = mode->clock * 1000;
+ unsigned long long clock = mode->clock * 1000
ULL
;
if (mode->flags & DRM_MODE_FLAG_DBLCLK)
clock = clock * 2;