From: Al Viro <viro@zeniv.linux.org.uk>
Date: Wed, 8 Nov 2006 08:27:36 +0000 (-0800)
Subject: [BLUETOOTH] bnep endianness bug: filtering by packet type
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=e41d21697326a38a0a871c515db88fa310177e24;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

[BLUETOOTH] bnep endianness bug: filtering by packet type

<= and => don't work well on net-endian...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/bluetooth/bnep/core.c b/net/bluetooth/bnep/core.c
index 4d3424c2421c..4e822f08b87b 100644
--- a/net/bluetooth/bnep/core.c
+++ b/net/bluetooth/bnep/core.c
@@ -117,14 +117,14 @@ static int bnep_send_rsp(struct bnep_session *s, u8 ctrl, u16 resp)
 static inline void bnep_set_default_proto_filter(struct bnep_session *s)
 {
 	/* (IPv4, ARP)  */
-	s->proto_filter[0].start = htons(0x0800);
-	s->proto_filter[0].end   = htons(0x0806);
+	s->proto_filter[0].start = ETH_P_IP;
+	s->proto_filter[0].end   = ETH_P_ARP;
 	/* (RARP, AppleTalk) */
-	s->proto_filter[1].start = htons(0x8035);
-	s->proto_filter[1].end   = htons(0x80F3);
+	s->proto_filter[1].start = ETH_P_RARP;
+	s->proto_filter[1].end   = ETH_P_AARP;
 	/* (IPX, IPv6) */
-	s->proto_filter[2].start = htons(0x8137);
-	s->proto_filter[2].end   = htons(0x86DD);
+	s->proto_filter[2].start = ETH_P_IPX;
+	s->proto_filter[2].end   = ETH_P_IPV6;
 }
 #endif
 
@@ -150,8 +150,8 @@ static int bnep_ctrl_set_netfilter(struct bnep_session *s, u16 *data, int len)
 		int i;
 
 		for (i = 0; i < n; i++) {
-			f[i].start = get_unaligned(data++);
-			f[i].end   = get_unaligned(data++);
+			f[i].start = ntohs(get_unaligned(data++));
+			f[i].end   = ntohs(get_unaligned(data++));
 
 			BT_DBG("proto filter start %d end %d",
 				f[i].start, f[i].end);
diff --git a/net/bluetooth/bnep/netdev.c b/net/bluetooth/bnep/netdev.c
index 7f7b27db6a8f..67a002a9751a 100644
--- a/net/bluetooth/bnep/netdev.c
+++ b/net/bluetooth/bnep/netdev.c
@@ -158,14 +158,15 @@ static inline int bnep_net_mc_filter(struct sk_buff *skb, struct bnep_session *s
 static inline u16 bnep_net_eth_proto(struct sk_buff *skb)
 {
 	struct ethhdr *eh = (void *) skb->data;
+	u16 proto = ntohs(eh->h_proto);
 	
-	if (ntohs(eh->h_proto) >= 1536)
-		return eh->h_proto;
+	if (proto >= 1536)
+		return proto;
 		
-	if (get_unaligned((u16 *) skb->data) == 0xFFFF)
-		return htons(ETH_P_802_3);
+	if (get_unaligned((__be16 *) skb->data) == htons(0xFFFF))
+		return ETH_P_802_3;
 		
-	return htons(ETH_P_802_2);
+	return ETH_P_802_2;
 }
 
 static inline int bnep_net_proto_filter(struct sk_buff *skb, struct bnep_session *s)