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authorRonak Doshi <doshir@vmware.com>2018-04-18 12:48:04 -0700
committerDavid S. Miller <davem@davemloft.net>2018-04-19 13:59:05 -0400
commit65ec0bd1c7c14522670a5294de35710fb577a7fd (patch)
treed2735aa7d11a3b1032bed6d1e0d7137e31bbc3de /drivers
parentf7e43672683b097bb074a8fe7af9bc600a23f231 (diff)
downloadlinux-65ec0bd1c7c14522670a5294de35710fb577a7fd.tar.bz2
vmxnet3: fix incorrect dereference when rxvlan is disabled
vmxnet3_get_hdr_len() is used to calculate the header length which in turn is used to calculate the gso_size for skb. When rxvlan offload is disabled, vlan tag is present in the header and the function references ip header from sizeof(ethhdr) and leads to incorrect pointer reference. This patch fixes this issue by taking sizeof(vlan_ethhdr) into account if vlan tag is present and correctly references the ip hdr. Signed-off-by: Ronak Doshi <doshir@vmware.com> Acked-by: Guolin Yang <gyang@vmware.com> Acked-by: Louis Luo <llouis@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/vmxnet3/vmxnet3_drv.c17
-rw-r--r--drivers/net/vmxnet3/vmxnet3_int.h4
2 files changed, 15 insertions, 6 deletions
diff --git a/drivers/net/vmxnet3/vmxnet3_drv.c b/drivers/net/vmxnet3/vmxnet3_drv.c
index e04937f44f33..9ebe2a689966 100644
--- a/drivers/net/vmxnet3/vmxnet3_drv.c
+++ b/drivers/net/vmxnet3/vmxnet3_drv.c
@@ -1218,6 +1218,7 @@ vmxnet3_get_hdr_len(struct vmxnet3_adapter *adapter, struct sk_buff *skb,
union {
void *ptr;
struct ethhdr *eth;
+ struct vlan_ethhdr *veth;
struct iphdr *ipv4;
struct ipv6hdr *ipv6;
struct tcphdr *tcp;
@@ -1228,16 +1229,24 @@ vmxnet3_get_hdr_len(struct vmxnet3_adapter *adapter, struct sk_buff *skb,
if (unlikely(sizeof(struct iphdr) + sizeof(struct tcphdr) > maplen))
return 0;
+ if (skb->protocol == cpu_to_be16(ETH_P_8021Q) ||
+ skb->protocol == cpu_to_be16(ETH_P_8021AD))
+ hlen = sizeof(struct vlan_ethhdr);
+ else
+ hlen = sizeof(struct ethhdr);
+
hdr.eth = eth_hdr(skb);
if (gdesc->rcd.v4) {
- BUG_ON(hdr.eth->h_proto != htons(ETH_P_IP));
- hdr.ptr += sizeof(struct ethhdr);
+ BUG_ON(hdr.eth->h_proto != htons(ETH_P_IP) &&
+ hdr.veth->h_vlan_encapsulated_proto != htons(ETH_P_IP));
+ hdr.ptr += hlen;
BUG_ON(hdr.ipv4->protocol != IPPROTO_TCP);
hlen = hdr.ipv4->ihl << 2;
hdr.ptr += hdr.ipv4->ihl << 2;
} else if (gdesc->rcd.v6) {
- BUG_ON(hdr.eth->h_proto != htons(ETH_P_IPV6));
- hdr.ptr += sizeof(struct ethhdr);
+ BUG_ON(hdr.eth->h_proto != htons(ETH_P_IPV6) &&
+ hdr.veth->h_vlan_encapsulated_proto != htons(ETH_P_IPV6));
+ hdr.ptr += hlen;
/* Use an estimated value, since we also need to handle
* TSO case.
*/
diff --git a/drivers/net/vmxnet3/vmxnet3_int.h b/drivers/net/vmxnet3/vmxnet3_int.h
index 59ec34052a65..a3326463b71f 100644
--- a/drivers/net/vmxnet3/vmxnet3_int.h
+++ b/drivers/net/vmxnet3/vmxnet3_int.h
@@ -69,10 +69,10 @@
/*
* Version numbers
*/
-#define VMXNET3_DRIVER_VERSION_STRING "1.4.13.0-k"
+#define VMXNET3_DRIVER_VERSION_STRING "1.4.14.0-k"
/* a 32-bit int, each byte encode a verion number in VMXNET3_DRIVER_VERSION */
-#define VMXNET3_DRIVER_VERSION_NUM 0x01040d00
+#define VMXNET3_DRIVER_VERSION_NUM 0x01040e00
#if defined(CONFIG_PCI_MSI)
/* RSS only makes sense if MSI-X is supported. */