Fix crash in malformed documents
diff --git a/poppler/GfxState.cc b/poppler/GfxState.cc
index e6cd329..f61f812 100644
--- a/poppler/GfxState.cc
+++ b/poppler/GfxState.cc
@@ -4034,18 +4034,18 @@
void GfxUnivariateShading::getColor(double t, GfxColor *color) {
double out[gfxColorMaxComps];
- int i, nComps;
+ int i;
- if (unlikely(nFuncs < 1)) {
+ // NB: there can be one function with n outputs or n functions with
+ // one output each (where n = number of color components)
+ const int nComps = nFuncs * funcs[0]->getOutputSize();
+
+ if (unlikely(nFuncs < 1 || nComps > gfxColorMaxComps)) {
for (int i = 0; i < gfxColorMaxComps; i++)
color->c[i] = 0;
return;
}
- // NB: there can be one function with n outputs or n functions with
- // one output each (where n = number of color components)
- nComps = nFuncs * funcs[0]->getOutputSize();
-
if (cacheSize > 0) {
double x, ix, *l, *u, *upper;
