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net: add a truesize parameter to skb_add_rx_frag()

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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>
This commit is contained in:
Eric Dumazet
2012-03-23 23:59:33 +00:00
committed by David S. Miller
parent 0015e551ed
commit 50269e19ad
7 changed files with 13 additions and 9 deletions
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3
drivers/net/wireless/iwlegacy/4965-mac.c
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@@ -596,7 +596,8 @@ il4965_pass_packet_to_mac80211(struct il_priv *il, struct ieee80211_hdr *hdr,
return;
}
skb_add_rx_frag(skb, 0, rxb->page, (void *)hdr - rxb_addr(rxb), len);
skb_add_rx_frag(skb, 0, rxb->page, (void *)hdr - rxb_addr(rxb), len,
len);
il_update_stats(il, false, fc, len);
memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));