From cbc0062992a838851afb1bb6cc67f32a2517b83d Mon Sep 17 00:00:00 2001
From: Yuri Pankov <yuripv@FreeBSD.org>
Date: Sat, 13 Oct 2018 16:25:28 +0000
Subject: [PATCH] strptime: disallow zero hour for %I (defined by POSIX as
 [01,12]) and %l (extension, defined in strftime(3) as 1-12).

Approved by:	re (gjb), kib (mentor)
Differential Revision:	https://reviews.freebsd.org/D17543
---
 lib/libc/stdtime/strptime.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/libc/stdtime/strptime.c b/lib/libc/stdtime/strptime.c
index 6214398f09e..78cef6bf839 100644
--- a/lib/libc/stdtime/strptime.c
+++ b/lib/libc/stdtime/strptime.c
@@ -291,7 +291,7 @@ label:
 			if (c == 'H' || c == 'k') {
 				if (i > 23)
 					return (NULL);
-			} else if (i > 12)
+			} else if (i == 0 || i > 12)
 				return (NULL);
 
 			tm->tm_hour = i;