Net, mac80211: Fix resource leak in ieee80211_rx_h_mesh_fwding()
authorJesper Juhl <jj@chaosbits.net>
Sat, 14 Jan 2012 20:52:17 +0000 (21:52 +0100)
committerJohn W. Linville <linville@tuxdriver.com>
Mon, 16 Jan 2012 20:01:15 +0000 (15:01 -0500)
We may leak the 'fwd_skb' we skb_copy() in ieee80211_rx_h_mesh_fwding() if
we take the 'else' branch in the 'if' statement just below. If we take
that branch we'll end up returning from the function and since we've not
assigned 'fwd_skb' to anything at that point, we leak it when the variable
goes out of scope.

The simple fix seems to be to just kfree_skb(fwd_skb); just before we
return. That is what this patch does.

Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
net/mac80211/rx.c

index f407427c642f4a6fdd1d6b38fb2462b244f00da1..7514091207696b9066e416305da8fb8084f651b0 100644 (file)
@@ -1979,6 +1979,7 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
                mesh_path_error_tx(ifmsh->mshcfg.element_ttl, fwd_hdr->addr3,
                                    0, reason, fwd_hdr->addr2, sdata);
                IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_no_route);
+               kfree_skb(fwd_skb);
                return RX_DROP_MONITOR;
        }