Commit 9d3b2d3e authored by Lorenzo Bianconi's avatar Lorenzo Bianconi Committed by David S. Miller

net: mvneta: fix possible use-after-free in mvneta_xdp_put_buff

Release first buffer as last one since it contains references
to subsequent fragments. This code will be optimized introducing
multi-buffer bit in xdp_buff structure.

Fixes: ca0e0146 ("net: mvneta: move skb build after descriptors processing")
Signed-off-by: default avatarLorenzo Bianconi <lorenzo@kernel.org>
Acked-by: default avatarJesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 5bf490e6
No related merge requests found
......@@ -2029,11 +2029,11 @@ mvneta_xdp_put_buff(struct mvneta_port *pp, struct mvneta_rx_queue *rxq,
struct skb_shared_info *sinfo = xdp_get_shared_info_from_buff(xdp);
int i;
page_pool_put_page(rxq->page_pool, virt_to_head_page(xdp->data),
sync_len, napi);
for (i = 0; i < sinfo->nr_frags; i++)
page_pool_put_full_page(rxq->page_pool,
skb_frag_page(&sinfo->frags[i]), napi);
page_pool_put_page(rxq->page_pool, virt_to_head_page(xdp->data),
sync_len, napi);
}
static int
......
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