From: Nur Hussein Date: Wed, 5 Apr 2023 20:25:59 +0000 (+0800) Subject: drm/tegra: Avoid potential 32-bit integer overflow X-Git-Tag: baikal/aarch64/sdk5.10~142 X-Git-Url: https://git.baikalelectronics.ru/sdk/?a=commitdiff_plain;h=31ec4bfb7bc409124efefc1bafca099fa1a3b704;p=kernel.git drm/tegra: Avoid potential 32-bit integer overflow [ Upstream commit 2429b3c529da29d4277d519bd66d034842dcd70c ] In tegra_sor_compute_config(), the 32-bit value mode->clock is multiplied by 1000, and assigned to the u64 variable pclk. We can avoid a potential 32-bit integer overflow by casting mode->clock to u64 before we do the arithmetic and assignment. Signed-off-by: Nur Hussein Signed-off-by: Thierry Reding Signed-off-by: Sasha Levin --- diff --git a/drivers/gpu/drm/tegra/sor.c b/drivers/gpu/drm/tegra/sor.c index 0419b6105c8a5..ccd084abc8c94 100644 --- a/drivers/gpu/drm/tegra/sor.c +++ b/drivers/gpu/drm/tegra/sor.c @@ -906,7 +906,7 @@ static int tegra_sor_compute_config(struct tegra_sor *sor, struct drm_dp_link *link) { const u64 f = 100000, link_rate = link->rate * 1000; - const u64 pclk = mode->clock * 1000; + const u64 pclk = (u64)mode->clock * 1000; u64 input, output, watermark, num; struct tegra_sor_params params; u32 num_syms_per_line;