From: bellard <bellard@c046a42c-6fe2-441c-8c8c-71466251a162>
Date: Thu, 15 Apr 2004 22:35:16 +0000 (+0000)
Subject: avoid segfault if transient invalid text resolution
X-Git-Tag: release_0_9_0-iwjtag~1668
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=3294b949eb97f41e29432830370eba62a6d5f28d;p=qemu-xen-unstable.git

avoid segfault if transient invalid text resolution


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@727 c046a42c-6fe2-441c-8c8c-71466251a162
---

diff --git a/hw/vga.c b/hw/vga.c
index 1321f7b24a..3a634a4d53 100644
--- a/hw/vga.c
+++ b/hw/vga.c
@@ -1154,6 +1154,11 @@ static void vga_draw_text(VGAState *s, int full_update)
             ((s->cr[0x07] & 0x40) << 3);
         height = (height + 1) / cheight;
     }
+    if ((height * width) > CH_ATTR_SIZE) {
+        /* better than nothing: exit if transient size is too big */
+        return;
+    }
+
     if (width != s->last_width || height != s->last_height ||
         cw != s->last_cw || cheight != s->last_ch) {
         s->last_scr_width = width * cw;