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gma/gma500: fix a memory disclosure bug due to uninitialized bytes

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[ Upstream commit 57a25a5f754ce27da2cfa6f413cfd366f878db76 ]

`best_clock` is an object that may be sent out. Object `clock`
contains uninitialized bytes that are copied to `best_clock`,
which leads to memory disclosure and information leak.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20191018042953.31099-1-kjlu@umn.edu
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Kangjie Lu 2019-10-17 23:29:53 -05:00 • committed by Greg Kroah-Hartman
commit 8b4e9c1bb0
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/gma500/cdv_intel_display.c
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@ -405,6 +405,8 @@ static bool cdv_intel_find_dp_pll(const struct gma_limit_t *limit,
struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
struct gma_clock_t clock;
memset(&clock, 0, sizeof(clock));
switch (refclk) {
case 27000:
if (target < 200000) {