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path: root/drivers/net/macvtap.c
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Diffstat (limited to 'drivers/net/macvtap.c')
-rw-r--r--drivers/net/macvtap.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/net/macvtap.c b/drivers/net/macvtap.c
index d636d051f..95394edd1 100644
--- a/drivers/net/macvtap.c
+++ b/drivers/net/macvtap.c
@@ -760,6 +760,8 @@ static ssize_t macvtap_get_user(struct macvtap_queue *q, struct msghdr *m,
macvtap16_to_cpu(q, vnet_hdr.hdr_len) : GOODCOPY_LEN;
if (copylen > good_linear)
copylen = good_linear;
+ else if (copylen < ETH_HLEN)
+ copylen = ETH_HLEN;
linear = copylen;
i = *from;
iov_iter_advance(&i, copylen);
@@ -769,10 +771,11 @@ static ssize_t macvtap_get_user(struct macvtap_queue *q, struct msghdr *m,
if (!zerocopy) {
copylen = len;
- if (macvtap16_to_cpu(q, vnet_hdr.hdr_len) > good_linear)
+ linear = macvtap16_to_cpu(q, vnet_hdr.hdr_len);
+ if (linear > good_linear)
linear = good_linear;
- else
- linear = macvtap16_to_cpu(q, vnet_hdr.hdr_len);
+ else if (linear < ETH_HLEN)
+ linear = ETH_HLEN;
}
skb = macvtap_alloc_skb(&q->sk, MACVTAP_RESERVE, copylen,