From: Phil Sutter <phil@nwl.cc>
Date: Thu, 5 Dec 2019 12:15:01 +0000 (+0100)
Subject: extensions: time: Avoid undefined shift
X-Git-Tag: v1.8.5~79
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=98b221002960040bf3505811c06025b6b9b6984b;p=thirdparty%2Fiptables.git

extensions: time: Avoid undefined shift

Value 1 is signed by default and left-shifting by 31 is undefined for
those. Fix this by marking the value as unsigned.

Fixes: ad326ef9f734a ("Add the libxt_time iptables match")
---

diff --git a/extensions/libxt_time.c b/extensions/libxt_time.c
index 5a8cc5de..d001f5b7 100644
--- a/extensions/libxt_time.c
+++ b/extensions/libxt_time.c
@@ -330,7 +330,7 @@ static void time_print_monthdays(uint32_t mask, bool human_readable)
 
 	printf(" ");
 	for (i = 1; i <= 31; ++i)
-		if (mask & (1 << i)) {
+		if (mask & (1u << i)) {
 			if (nbdays++ > 0)
 				printf(",");
 			printf("%u", i);