[PATCH] drm/gma500: fix memory disclosures due to uninitialized bytes

[Kangjie Lu]

"clock" may be copied to "best_clock". Initializing best_clock
is not sufficient. The fix initializes clock as well to avoid
memory disclosures and informaiton leaks.

Signed-off-by: Kangjie Lu <k...@umn.edu>
---
 drivers/gpu/drm/gma500/oaktrail_crtc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/gma500/oaktrail_crtc.c 
b/drivers/gpu/drm/gma500/oaktrail_crtc.c
index 167c10767dd4..900e5499249d 100644
--- a/drivers/gpu/drm/gma500/oaktrail_crtc.c
+++ b/drivers/gpu/drm/gma500/oaktrail_crtc.c
@@ -129,6 +129,7 @@ static bool mrst_sdvo_find_best_pll(const struct 
gma_limit_t *limit,
        s32 freq_error, min_error = 100000;
 
        memset(best_clock, 0, sizeof(*best_clock));
+       memset(&clock, 0, sizeof(clock));
 
        for (clock.m = limit->m.min; clock.m <= limit->m.max; clock.m++) {
                for (clock.n = limit->n.min; clock.n <= limit->n.max;
@@ -185,6 +186,7 @@ static bool mrst_lvds_find_best_pll(const struct 
gma_limit_t *limit,
        int err = target;
 
        memset(best_clock, 0, sizeof(*best_clock));
+       memset(&clock, 0, sizeof(clock));
 
        for (clock.m = limit->m.min; clock.m <= limit->m.max; clock.m++) {
                for (clock.p1 = limit->p1.min; clock.p1 <= limit->p1.max;
-- 
2.17.1