From c794d188222a4d3414233ff9630d47eedc090fbe Mon Sep 17 00:00:00 2001 From: Dimitry Andric Date: Thu, 21 Dec 2023 23:35:17 +0100 Subject: [PATCH] Fix snprintf truncation in telnet Building telnet with clang 18 results in the following warning: contrib/telnet/telnet/telnet.c:231:5: error: 'snprintf' will always be truncated; specified size is 10, but format string expands to at least 11 [-Werror,-Wformat-truncation] 231 | snprintf(temp2, sizeof(temp2), "%c%c%c%c....%c%c", IAC, SB, TELOPT_COMPORT, | ^ The temp2 buffer is 10 chars, while the format string also consists of 10 chars. Therefore, snprintf(3) will truncate the last character, 'SE' (end sub negotation) in this case. Bump the buffer to 11 chars to avoid truncation. MFC after: 3 days --- contrib/telnet/telnet/telnet.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/contrib/telnet/telnet/telnet.c b/contrib/telnet/telnet/telnet.c index a35ea40c4cd..c936a85c9a2 100644 --- a/contrib/telnet/telnet/telnet.c +++ b/contrib/telnet/telnet/telnet.c @@ -206,7 +206,7 @@ unsigned char ComPortBaudRate[256]; void DoBaudRate(char *arg) { - char *temp, temp2[10]; + char *temp, temp2[11]; int i; uint32_t baudrate;