From: Brian Paul <brianp@vmware.com>
Date: Mon, 10 Oct 2016 21:54:09 +0000 (-0600)
Subject: stw/wgl: add null context check in wglBindTexImageARB()
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=7753f040facc89de4dacc33f9407a4fa334bf58c;p=mesa.git

stw/wgl: add null context check in wglBindTexImageARB()

To avoid dereferencing a null pointer in case wglMakeCurrent() wasn't
called.  Found while debugging SWKOTOR game.

Reviewed-by: Neha Bhende <bhenden@vmware.com>
Reviewed-by: Charmaine Lee <charmainel@vmware.com>
---

diff --git a/src/gallium/state_trackers/wgl/stw_ext_rendertexture.c b/src/gallium/state_trackers/wgl/stw_ext_rendertexture.c
index 5eeb0df21f1..9d766966771 100644
--- a/src/gallium/state_trackers/wgl/stw_ext_rendertexture.c
+++ b/src/gallium/state_trackers/wgl/stw_ext_rendertexture.c
@@ -129,6 +129,12 @@ wglBindTexImageARB(HPBUFFERARB hPbuffer, int iBuffer)
     * we do here.
     */
 
+   if (!curctx) {
+      debug_printf("No rendering context in wglBindTexImageARB()\n");
+      SetLastError(ERROR_INVALID_OPERATION);
+      return FALSE;
+   }
+
    fb = stw_framebuffer_from_HPBUFFERARB(hPbuffer);
    if (!fb) {
       debug_printf("Invalid pbuffer handle in wglBindTexImageARB()\n");