linux-kernel - [PATCH] netfilter: conntrack: fix -Wformat

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Message-Id: <20201107075550.2244055-1-ndesaulniers@google.com>
Date:   Fri,  6 Nov 2020 23:55:50 -0800
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Pablo Neira Ayuso <pablo@...filter.org>,
        Jozsef Kadlecsik <kadlec@...filter.org>,
        Florian Westphal <fw@...len.de>
Cc:     Nick Desaulniers <ndesaulniers@...gle.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Nathan Chancellor <natechancellor@...il.com>,
        netfilter-devel@...r.kernel.org, coreteam@...filter.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        clang-built-linux@...glegroups.com
Subject: [PATCH] netfilter: conntrack: fix -Wformat

Clang is more aggressive about -Wformat warnings when the format flag
specifies a type smaller than the parameter. Fixes 8 instances of:

warning: format specifies type 'unsigned short' but the argument has
type 'int' [-Wformat]

Link: https://github.com/ClangBuiltLinux/linux/issues/378
Signed-off-by: Nick Desaulniers <ndesaulniers@...gle.com>
---
 net/netfilter/nf_conntrack_standalone.c | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/net/netfilter/nf_conntrack_standalone.c b/net/netfilter/nf_conntrack_standalone.c
index 46c5557c1fec..c5aa45c38eb2 100644
--- a/net/netfilter/nf_conntrack_standalone.c
+++ b/net/netfilter/nf_conntrack_standalone.c
@@ -50,38 +50,38 @@ print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple,
 
 	switch (l4proto->l4proto) {
 	case IPPROTO_ICMP:
-		seq_printf(s, "type=%u code=%u id=%u ",
+		seq_printf(s, "type=%u code=%u id=%hu ",
 			   tuple->dst.u.icmp.type,
 			   tuple->dst.u.icmp.code,
-			   ntohs(tuple->src.u.icmp.id));
+			   (__be16)ntohs(tuple->src.u.icmp.id));
 		break;
 	case IPPROTO_TCP:
 		seq_printf(s, "sport=%hu dport=%hu ",
-			   ntohs(tuple->src.u.tcp.port),
-			   ntohs(tuple->dst.u.tcp.port));
+			   (__be16)ntohs(tuple->src.u.tcp.port),
+			   (__be16)ntohs(tuple->dst.u.tcp.port));
 		break;
 	case IPPROTO_UDPLITE:
 	case IPPROTO_UDP:
 		seq_printf(s, "sport=%hu dport=%hu ",
-			   ntohs(tuple->src.u.udp.port),
-			   ntohs(tuple->dst.u.udp.port));
+			   (__be16)ntohs(tuple->src.u.udp.port),
+			   (__be16)ntohs(tuple->dst.u.udp.port));
 
 		break;
 	case IPPROTO_DCCP:
 		seq_printf(s, "sport=%hu dport=%hu ",
-			   ntohs(tuple->src.u.dccp.port),
-			   ntohs(tuple->dst.u.dccp.port));
+			   (__be16)ntohs(tuple->src.u.dccp.port),
+			   (__be16)ntohs(tuple->dst.u.dccp.port));
 		break;
 	case IPPROTO_SCTP:
 		seq_printf(s, "sport=%hu dport=%hu ",
-			   ntohs(tuple->src.u.sctp.port),
-			   ntohs(tuple->dst.u.sctp.port));
+			   (__be16)ntohs(tuple->src.u.sctp.port),
+			   (__be16)ntohs(tuple->dst.u.sctp.port));
 		break;
 	case IPPROTO_ICMPV6:
-		seq_printf(s, "type=%u code=%u id=%u ",
+		seq_printf(s, "type=%u code=%u id=%hu ",
 			   tuple->dst.u.icmp.type,
 			   tuple->dst.u.icmp.code,
-			   ntohs(tuple->src.u.icmp.id));
+			   (__be16)ntohs(tuple->src.u.icmp.id));
 		break;
 	case IPPROTO_GRE:
 		seq_printf(s, "srckey=0x%x dstkey=0x%x ",
-- 
2.29.2.222.g5d2a92d10f8-goog