Index: util-linux-ng-2.18/mount/swapon.c
===================================================================
--- util-linux-ng-2.18.orig/mount/swapon.c
+++ util-linux-ng-2.18/mount/swapon.c
@@ -23,6 +23,7 @@
 #include "pathnames.h"
 #include "swapheader.h"
 #include "mangle.h"
+#include "canonicalize.h"
 
 #define PATH_MKSWAP	"/sbin/mkswap"
 
@@ -171,7 +172,11 @@ read_proc_swaps(void) {
 			break;
 		swapFiles = q;
 
-		swapFiles[numSwaps++] = unmangle(line);
+		if ((p = unmangle(line)) == NULL)
+			break;
+
+		swapFiles[numSwaps++] = canonicalize_path(p);
+		free(p);
 	}
 	fclose(swaps);
 }
@@ -179,10 +184,14 @@ read_proc_swaps(void) {
 static int
 is_in_proc_swaps(const char *fname) {
 	int i;
+	char *p = canonicalize_path(fname);
 
 	for (i = 0; i < numSwaps; i++)
-		if (swapFiles[i] && !strcmp(fname, swapFiles[i]))
+		if (swapFiles[i] && !strcmp(p, swapFiles[i])) {
+			free(p);
 			return 1;
+		}
+	free(p);
 	return 0;
 }