net: qualcomm: rmnet: fix two pointer math bugs

We recently changed these two pointers from void pointers to struct
pointers and it breaks the pointer math so now the "txphdr" points
beyond the end of the buffer.

Fixes: 56a967c4f7e5 ("net: qualcomm: rmnet: Remove some unneeded casts")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c b/drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c
index 3ee5c1a8b46e471155d8264a3232b17ff08e4504..3676976c875bc9cc20c7c086c01a9abeeb617735 100644 (file)
--- a/drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c
+++ b/drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c
@@ -168,7 +168,7 @@ static void rmnet_map_complement_ipv4_txporthdr_csum_field(struct iphdr *ip4h)
        void *txphdr;
        u16 *csum;
 
-       txphdr = ip4h + ip4h->ihl * 4;
+       txphdr = (void *)ip4h + ip4h->ihl * 4;
 
        if (ip4h->protocol == IPPROTO_TCP || ip4h->protocol == IPPROTO_UDP) {
                csum = (u16 *)rmnet_map_get_csum_field(ip4h->protocol, txphdr);
@@ -203,7 +203,7 @@ rmnet_map_complement_ipv6_txporthdr_csum_field(struct ipv6hdr *ip6h)
        void *txphdr;
        u16 *csum;
 
-       txphdr = ip6h + sizeof(struct ipv6hdr);
+       txphdr = ip6h + 1;
 
        if (ip6h->nexthdr == IPPROTO_TCP || ip6h->nexthdr == IPPROTO_UDP) {
                csum = (u16 *)rmnet_map_get_csum_field(ip6h->nexthdr, txphdr);