commit 1cabeda5505dcc35d4d2ca2a09151a7c449fb401
from: Hiltjo Posthuma <hiltjo@codemadness.org>
date: Fri Nov  3 20:07:02 2017 UTC

fix a possible free of a uninitialize variable in paste()

commit - 41379f7c39e6aa0a17d7807b22b49ea148f5b0fa
commit + 1cabeda5505dcc35d4d2ca2a09151a7c449fb401
blob - 91330f191f7b219aff9217c1e20bf51afeb769c4
blob + eae56850e37d6cf78b570a46b1f5abe57e3df563
--- dmenu.c
+++ dmenu.c
@@ -467,10 +467,12 @@ paste(void)
 	Atom da;
 
 	/* we have been given the current selection, now insert it into input */
-	XGetWindowProperty(dpy, win, utf8, 0, (sizeof text / 4) + 1, False,
-	                   utf8, &da, &di, &dl, &dl, (unsigned char **)&p);
-	insert(p, (q = strchr(p, '\n')) ? q - p : (ssize_t)strlen(p));
-	XFree(p);
+	if (XGetWindowProperty(dpy, win, utf8, 0, (sizeof text / 4) + 1, False,
+	                   utf8, &da, &di, &dl, &dl, (unsigned char **)&p)
+	    == Success && p) {
+		insert(p, (q = strchr(p, '\n')) ? q - p : (ssize_t)strlen(p));
+		XFree(p);
+	}
 	drawmenu();
 }