From fa9aca493007616cdc0529a2a4d13ff397a07558 Mon Sep 17 00:00:00 2001
From: Bas van Schaik <bas@traiectum.net>
Date: Thu, 3 Dec 2015 13:28:32 +0000
Subject: [PATCH] avoid confusion with parameter 'devname' with same name,
 ensure buffer is large enough for two ints plus extras

---
 Incremental.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Incremental.c b/Incremental.c
index 32090d9..a91129e 100644
--- a/Incremental.c
+++ b/Incremental.c
@@ -1030,12 +1030,12 @@ static int array_try_spare(char *devname, int *dfdp, struct dev_policy *pol,
 		int mdfd = open_dev(chosen->sys_name);
 		if (mdfd >= 0) {
 			struct mddev_dev devlist;
-			char devname[20];
+			char chosen_devname[24]; // 2*11 for int (including signs) + colon + null
 			devlist.next = NULL;
 			devlist.used = 0;
 			devlist.writemostly = 0;
-			devlist.devname = devname;
-			sprintf(devname, "%d:%d", major(stb.st_rdev),
+			devlist.devname = chosen_devname;
+			sprintf(chosen_devname, "%d:%d", major(stb.st_rdev),
 				minor(stb.st_rdev));
 			devlist.disposition = 'a';
 			close(dfd);