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Date: Thu, 11 Aug 2022 11:41:12 -0400 From: Sasha Levin <sashal@...nel.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: Xiaohui Zhang <xiaohuizhang@....edu.cn>, Alex Deucher <alexander.deucher@....com>, Sasha Levin <sashal@...nel.org>, christian.koenig@....com, Xinhui.Pan@....com, airlied@...ux.ie, daniel@...ll.ch, amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org Subject: [PATCH AUTOSEL 5.18 18/93] drm/radeon: integer overflow in radeon_mode_dumb_create() From: Xiaohui Zhang <xiaohuizhang@....edu.cn> [ Upstream commit feb54650bae25f2a2adfc493e3e254e7c27a3fba ] Similar to the handling of amdgpu_mode_dumb_create in commit 54ef0b5461c0 ("drm/amdgpu: integer overflow in amdgpu_mode_dumb_create()"), we thought a patch might be needed here as well. args->size is a u64. arg->pitch and args->height are u32. The multiplication will overflow instead of using the high 32 bits as intended. Signed-off-by: Xiaohui Zhang <xiaohuizhang@....edu.cn> Signed-off-by: Alex Deucher <alexander.deucher@....com> Signed-off-by: Sasha Levin <sashal@...nel.org> --- drivers/gpu/drm/radeon/radeon_gem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/radeon/radeon_gem.c b/drivers/gpu/drm/radeon/radeon_gem.c index f563284a7fac..6c9cc0061a8d 100644 --- a/drivers/gpu/drm/radeon/radeon_gem.c +++ b/drivers/gpu/drm/radeon/radeon_gem.c @@ -830,7 +830,7 @@ int radeon_mode_dumb_create(struct drm_file *file_priv, args->pitch = radeon_align_pitch(rdev, args->width, DIV_ROUND_UP(args->bpp, 8), 0); - args->size = args->pitch * args->height; + args->size = (u64)args->pitch * args->height; args->size = ALIGN(args->size, PAGE_SIZE); r = radeon_gem_object_create(rdev, args->size, 0, -- 2.35.1
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