[Qemu-devel] [RESEND PULL for-2.3 1/1] hw/net/e1000: fix integer endianness

[Stefan Hajnoczi]

From: Shannon Zhao <address@hidden>

It's detected by coverity.In is_vlan_packet s->mac_reg[VET] is
unsigned int but is dereferenced as a narrower unsigned short.
This may lead to unexpected results depending on machine
endianness.

Signed-off-by: Shannon Zhao <address@hidden>
Signed-off-by: Shannon Zhao <address@hidden>
Message-id: address@hidden
Signed-off-by: Stefan Hajnoczi <address@hidden>
---
 hw/net/e1000.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/net/e1000.c b/hw/net/e1000.c
index 3405cb9..091d61a 100644
--- a/hw/net/e1000.c
+++ b/hw/net/e1000.c
@@ -578,7 +578,7 @@ static inline int
 is_vlan_packet(E1000State *s, const uint8_t *buf)
 {
     return (be16_to_cpup((uint16_t *)(buf + 12)) ==
-                le16_to_cpup((uint16_t *)(s->mac_reg + VET)));
+                le16_to_cpu(s->mac_reg[VET]));
 }
 
 static inline int
@@ -711,7 +711,7 @@ process_tx_desc(E1000State *s, struct e1000_tx_desc *dp)
         (tp->cptse || txd_lower & E1000_TXD_CMD_EOP)) {
         tp->vlan_needed = 1;
         stw_be_p(tp->vlan_header,
-                      le16_to_cpup((uint16_t *)(s->mac_reg + VET)));
+                      le16_to_cpu(s->mac_reg[VET]));
         stw_be_p(tp->vlan_header + 2,
                       le16_to_cpu(dp->upper.fields.special));
     }
-- 
2.1.0