net: add a truesize parameter to skb_add_rx_frag()
skb_add_rx_frag() API is misleading.
Network skbs built with this helper can use uncharged kernel memory and
eventually stress/crash machine in OOM.
Add a 'truesize' parameter and then fix drivers in followup patches.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 6eb656a..a690cae 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -321,12 +321,12 @@
EXPORT_SYMBOL(__netdev_alloc_skb);
void skb_add_rx_frag(struct sk_buff *skb, int i, struct page *page, int off,
- int size)
+ int size, unsigned int truesize)
{
skb_fill_page_desc(skb, i, page, off, size);
skb->len += size;
skb->data_len += size;
- skb->truesize += size;
+ skb->truesize += truesize;
}
EXPORT_SYMBOL(skb_add_rx_frag);