From 237a8650d640adfb00b65358891fed0e84edfd09 Mon Sep 17 00:00:00 2001
From: Michael Walle <michael@walle.cc>
Date: Thu, 13 Oct 2016 00:35:07 +0200
Subject: [PATCH] lm32: milkymist-tmu2: fix integer overflow
Don't truncate the multiplication and do a 64 bit one instead because
because the result is stored in a 64 bit variable.
Spotted by coverity, CID 1167561.
Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
---
hw/display/milkymist-tmu2.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/hw/display/milkymist-tmu2.c b/hw/display/milkymist-tmu2.c
index 9c0018448a..5c666f9b24 100644
--- a/hw/display/milkymist-tmu2.c
+++ b/hw/display/milkymist-tmu2.c
@@ -213,7 +213,7 @@ static void tmu2_start(MilkymistTMU2State *s)
/* Read the QEMU source framebuffer into an OpenGL texture */
glGenTextures(1, &texture);
glBindTexture(GL_TEXTURE_2D, texture);
- fb_len = 2*s->regs[R_TEXHRES]*s->regs[R_TEXVRES];
+ fb_len = 2ULL * s->regs[R_TEXHRES] * s->regs[R_TEXVRES];
fb = cpu_physical_memory_map(s->regs[R_TEXFBUF], &fb_len, 0);
if (fb == NULL) {
glDeleteTextures(1, &texture);
--
2.30.2