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net: qualcomm: rmnet: Fix leak on transmit failure 

If a skb in transmit path does not have sufficient headroom to add
the map header, the skb is not sent out and is never freed.

Fixes: ceed73a2cf ("drivers: net: ethernet: qualcomm: rmnet: Initial implementation")
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Subash Abhinov Kasiviswanathan 2017-12-05 13:41:17 -07:00 committed by David S. Miller
parent c9d3fe9da0
commit c20a548792
1 changed files with 6 additions and 2 deletions
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8
drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c
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@ -126,12 +126,12 @@ static int rmnet_map_egress_handler(struct sk_buff *skb,
if (skb_headroom(skb) < required_headroom) {
if (pskb_expand_head(skb, required_headroom, 0, GFP_KERNEL))
return RMNET_MAP_CONSUMED;
goto fail;
}
map_header = rmnet_map_add_map_header(skb, additional_header_len, 0);
if (!map_header)
return RMNET_MAP_CONSUMED;
goto fail;
if (port->egress_data_format & RMNET_EGRESS_FORMAT_MUXING) {
if (mux_id == 0xff)
@ -143,6 +143,10 @@ static int rmnet_map_egress_handler(struct sk_buff *skb,
skb->protocol = htons(ETH_P_MAP);
return RMNET_MAP_SUCCESS;
fail:
kfree_skb(skb);
return RMNET_MAP_CONSUMED;
}
static void