munmap: Change permission of VMA back to RWX on unmap

Change-Id: Ic02098e7458dd8fa2961fb03dc32e37fb18c5dc5
Refs: #988

test/issues/988/C988.sh

@@ -0,0 +1,40 @@
+#/bin/sh
+
+USELTP=1
+USEOSTEST=0
+
+. ../../common.sh
+
+issue=988
+tid=01
+
+tname=`printf "C${issue}T%02d" ${tid}`
+echo "*** ${tname} start *******************************"
+ng=0
+${MCEXEC} ./C988
+
+if [ $? -eq 0 ]; then
+	echo "*** ${tname} PASSED ******************************"
+else
+	echo "*** ${tname} FAILED ******************************"
+fi
+let tid++
+echo ""
+
+for tp in mmap01 mmap02 mmap03 mmap04 mmap05 mmap06 mmap07 mmap08\
+	mmap09 mmap12 mmap14 mmap15
+do
+	tname=`printf "C${issue}T%02d" ${tid}`
+	echo "*** ${tname} start *******************************"
+	sudo $MCEXEC $LTPBIN/$tp 2>&1 | tee $tp.txt
+	ok=`grep TPASS $tp.txt | wc -l`
+	ng=`grep TFAIL $tp.txt | wc -l`
+	if [ $ng = 0 ]; then
+		echo "*** ${tname} PASSED ($ok)"
+	else
+		echo "*** ${tname} FAILED (ok=$ok ng=%ng)"
+	fi
+	let tid++
+	echo ""
+done
+