From febea34f914b10e2aed177f49bfd6e9da9be5bef Mon Sep 17 00:00:00 2001 From: Vitaly Buka Date: Sun, 20 Aug 2017 11:56:47 -0700 Subject: [PATCH] avcodec/utils: Fix signed integer overflow in rc_initial_buffer_occupancy initialization Signed integer overflow is undefined behavior. Detected with clang and -fsanitize=signed-integer-overflow Signed-off-by: Vitaly Buka Signed-off-by: Michael Niedermayer (cherry picked from commit 8c2bb10ddfef1f151b9455d152c9aca91140a4b0) Signed-off-by: Michael Niedermayer --- libavcodec/utils.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/utils.c b/libavcodec/utils.c index 2d57aea469..6d6bbb7c22 100644 --- a/libavcodec/utils.c +++ b/libavcodec/utils.c @@ -1570,7 +1570,7 @@ FF_ENABLE_DEPRECATION_WARNINGS } if (!avctx->rc_initial_buffer_occupancy) - avctx->rc_initial_buffer_occupancy = avctx->rc_buffer_size * 3 / 4; + avctx->rc_initial_buffer_occupancy = avctx->rc_buffer_size * 3LL / 4; if (avctx->ticks_per_frame && avctx->time_base.num && avctx->ticks_per_frame > INT_MAX / avctx->time_base.num) {