From: =?UTF-8?q?Maciej=20=C5=BBenczykowski?= <maze@google.com>
Date: Tue, 26 Nov 2019 14:44:16 -0800
Subject: net: inet_is_local_reserved_port() port arg should be unsigned short
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Patch-mainline: v5.5-rc1
Git-commit: 66e2f5f7c7728862e9394769722231b9ce3d8672
References: bsc#1154353

Any argument outside of that range would result in an out of bound
memory access, since the accessed array is 65536 bits long.

Signed-off-by: Maciej Żenczykowski <maze@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 include/net/ip.h |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/include/net/ip.h
+++ b/include/net/ip.h
@@ -338,7 +338,7 @@ static inline u64 snmp_fold_field64(void
 void inet_get_local_port_range(struct net *net, int *low, int *high);
 
 #ifdef CONFIG_SYSCTL
-static inline bool inet_is_local_reserved_port(struct net *net, int port)
+static inline bool inet_is_local_reserved_port(struct net *net, unsigned short port)
 {
 	if (!net->ipv4.sysctl_local_reserved_ports)
 		return false;
@@ -356,7 +356,7 @@ static inline int inet_prot_sock(struct
 }
 
 #else
-static inline bool inet_is_local_reserved_port(struct net *net, int port)
+static inline bool inet_is_local_reserved_port(struct net *net, unsigned short port)
 {
 	return false;
 }