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---
 multipathd/cli_handlers.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

Index: multipath-tools-130222/multipathd/cli_handlers.c
===================================================================
--- multipath-tools-130222.orig/multipathd/cli_handlers.c
+++ multipath-tools-130222/multipathd/cli_handlers.c
@@ -133,10 +133,12 @@ show_maps_json (char ** r, int * len, st
 	struct multipath * mpp;
 	char * c;
 	char * reply;
-	unsigned int maxlen = INITIAL_REPLY_LEN *
-			PRINT_JSON_MULTIPLIER * VECTOR_SIZE(vecs->mpvec);
+	unsigned int maxlen = INITIAL_REPLY_LEN;
 	int again = 1;
 
+	if (VECTOR_SIZE(vecs->mpvec) > 0)
+		maxlen *= PRINT_JSON_MULTIPLIER * VECTOR_SIZE(vecs->mpvec);
+
 	vector_foreach_slot(vecs->mpvec, mpp, i) {
 		if (update_multipath(vecs, mpp->alias, 0)) {
 			return 1;