[Qemu-devel] [PATCH 6/8] hw/timer/exynos4210_mct: Avoid overflow in exynos4210_ltick_recalc_count

[Peter Maydell]

Add casts to avoid potentially overflowing the multiplications
of 32 bit quantities in exynos4210_ltick_recalc_count().

Signed-off-by: Peter Maydell <address@hidden>
---
 hw/timer/exynos4210_mct.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/timer/exynos4210_mct.c b/hw/timer/exynos4210_mct.c
index 86f4fcd..69dbecd 100644
--- a/hw/timer/exynos4210_mct.c
+++ b/hw/timer/exynos4210_mct.c
@@ -824,14 +824,14 @@ static void exynos4210_ltick_recalc_count(struct 
tick_timer *s)
          */
 
         if (s->last_tcnto) {
-            to_count = s->last_tcnto * s->last_icnto;
+            to_count = (uint64_t)s->last_tcnto * s->last_icnto;
         } else {
             to_count = s->last_icnto;
         }
     } else {
         /* distance is passed, recalculate with tcnto * icnto */
         if (s->icntb) {
-            s->distance = s->tcntb * s->icntb;
+            s->distance = (uint64_t)s->tcntb * s->icntb;
         } else {
             s->distance = s->tcntb;
         }
-- 
1.9.2