From: NeilBrown <neilb@suse.de>
Date: Tue, 26 Feb 2008 18:57:39 +0000 (-0500)
Subject: If validateascii is passed a string containing only non-zero 7bit
X-Git-Tag: nfs-utils-1-1-2~13
X-Git-Url: https://git.decadent.org.uk/gitweb/?p=nfs-utils.git;a=commitdiff_plain;h=bcd0fcaf0966c546da5043be700587f73174ae25

If validateascii is passed a string containing only non-zero 7bit
values, then the loop with exit with i == len, and the following
test will access beyond the end of the array.

So add an extra test to fix this.

Found by Marcus Meissner <meissner@novell.com>.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Steve Dickson <steved@redhat.com>
---

diff --git a/utils/idmapd/idmapd.c b/utils/idmapd/idmapd.c
index 355c6e1..6b5971c 100644
--- a/utils/idmapd/idmapd.c
+++ b/utils/idmapd/idmapd.c
@@ -848,7 +848,7 @@ validateascii(char *string, u_int32_t len)
 			return (-1);
 	}
 
-	if (string[i] != '\0')
+	if ((i >= len) || string[i] != '\0')
 		return (-1);
 
 	return (i + 1);