3.2-stable review patch. If anyone has any objections, please let me know.
------------------ From: Jason Wang <jasow...@redhat.com> commit 02ce04bb3d28c3333231f43bca677228dbc686fe upstream. When get_user_pages_fast() fails to get all requested pages, we could not use kfree_skb() to free it as it has not been put in the skb fragments. So we need to call put_page() instead. Signed-off-by: Jason Wang <jasow...@redhat.com> Signed-off-by: Michael S. Tsirkin <m...@redhat.com> Signed-off-by: Ben Hutchings <b...@decadent.org.uk> --- drivers/net/macvtap.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/net/macvtap.c b/drivers/net/macvtap.c index 7cb2684..9ab182a 100644 --- a/drivers/net/macvtap.c +++ b/drivers/net/macvtap.c @@ -531,9 +531,11 @@ static int zerocopy_sg_from_iovec(struct sk_buff *skb, const struct iovec *from, size = ((base & ~PAGE_MASK) + len + ~PAGE_MASK) >> PAGE_SHIFT; num_pages = get_user_pages_fast(base, size, 0, &page[i]); if ((num_pages != size) || - (num_pages > MAX_SKB_FRAGS - skb_shinfo(skb)->nr_frags)) - /* put_page is in skb free */ + (num_pages > MAX_SKB_FRAGS - skb_shinfo(skb)->nr_frags)) { + for (i = 0; i < num_pages; i++) + put_page(page[i]); return -EFAULT; + } truesize = size * PAGE_SIZE; skb->data_len += len; skb->len += len; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/