[PATCH] dmxConfigCanvasUpdate: Delay dereference until after checking for NULL
Alan Coopersmith
alan.coopersmith at oracle.com
Mon Apr 21 15:18:45 PDT 2014
Flagged by cppcheck 1.64:
[hw/dmx/config/xdmxconfig.c:306] -> [hw/dmx/config/xdmxconfig.c:323]:
(warning) Possible null pointer dereference: fs - otherwise
it is redundant to check it against null.
Signed-off-by: Alan Coopersmith <alan.coopersmith at oracle.com>
---
hw/dmx/config/xdmxconfig.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/hw/dmx/config/xdmxconfig.c b/hw/dmx/config/xdmxconfig.c
index 2b7b968..0540d01 100644
--- a/hw/dmx/config/xdmxconfig.c
+++ b/hw/dmx/config/xdmxconfig.c
@@ -303,7 +303,6 @@ dmxConfigCanvasUpdate(void)
fs = XQueryFont(dpy, gcontext);
for (pt = dmxConfigCurrent->subentry; pt; pt = pt->next) {
int x, y, len;
- int xo = 3, yo = fs->ascent + fs->descent + 2;
GC gc;
if (pt->type != dmxConfigDisplay)
@@ -321,6 +320,8 @@ dmxConfigCanvasUpdate(void)
y = dmxConfigWidgetHeight - 1;
XDrawRectangle(dpy, win, gc, x, y, w, h);
if (fs && len) {
+ int xo = 3, yo = fs->ascent + fs->descent + 2;
+
while (len && XTextWidth(fs, pt->display->name, len) >= w - 2 * xo)
--len;
if (len)
--
1.7.9.2
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