linux-kernel - [PATCH] vsprintf: flowinfo in IPv6 is optional too

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Message-Id: <1454501601-28480-1-git-send-email-Jason@zx2c4.com>
Date:	Wed,  3 Feb 2016 13:13:21 +0100
From:	"Jason A. Donenfeld" <Jason@...c4.com>
To:	akpm@...ux-foundation.org, linux@...musvillemoes.dk,
	andriy.shevchenko@...ux.intel.com, linux-kernel@...r.kernel.org,
	dborkman@...hat.com
Cc:	"Jason A. Donenfeld" <Jason@...c4.com>
Subject: [PATCH] vsprintf: flowinfo in IPv6 is optional too

Signed-off-by: Jason A. Donenfeld <Jason@...c4.com>
---
 lib/vsprintf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 1b1b1c8..85e6645 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -1189,7 +1189,7 @@ char *ip6_addr_string_sa(char *buf, char *end, const struct sockaddr_in6 *sa,
 		*p++ = ':';
 		p = number(p, pend, ntohs(sa->sin6_port), spec);
 	}
-	if (have_f) {
+	if (have_f && (sa->sin6_flowinfo & IPV6_FLOWINFO_MASK)) {
 		*p++ = '/';
 		p = number(p, pend, ntohl(sa->sin6_flowinfo &
 					  IPV6_FLOWINFO_MASK), spec);
-- 
2.7.0