[PATCH] net: ipv6: Fixed IPv6 string to address conversion off-by-one error

[emohandesi at linux.microsoft.com]

From: Ehsan Mohandesi <emohandesi at microsoft.com>

One extra character was being checked in the IPv6 string which caused the
last character of the address to be neither '\0' nor ':'. This raises an
error condition and causes the function to always return an error. This
issue was resolved by this fix.

Signed-off-by: Ehsan Mohandesi <emohandesi at microsoft.com>
---
 net/tftp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/tftp.c b/net/tftp.c
index c780c33..328fd90 100644
--- a/net/tftp.c
+++ b/net/tftp.c
@@ -837,7 +837,7 @@ void tftp_start(enum proto_t protocol)
 			e = strchr(net_boot_file_name, ']');
 			len = e - s;
 			if (s && e) {
-				string_to_ip6(s + 1, len, &tftp_remote_ip6);
+				string_to_ip6(s + 1, len - 1, &tftp_remote_ip6);
 				strlcpy(tftp_filename, e + 2, MAX_LEN);
 			} else {
 				strlcpy(tftp_filename, net_boot_file_name, MAX_LEN);
-- 
1.8.3.1