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net: ipv6: rpl_iptunnel: Fix potential memory leak in rpl_do_srh_inline

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In case memory resources for buf were allocated, release them before
return.

Addresses-Coverity-ID: 1492011 ("Resource leak")
Fixes: a7a29f9c36 ("net: ipv6: add rpl sr tunnel")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Gustavo A. R. Silva 2020-03-31 11:35:06 -05:00 committed by David S. Miller
parent a0190431d1
commit 7f80ccfe99
1 changed files with 3 additions and 1 deletions
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4
net/ipv6/rpl_iptunnel.c
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@ -155,8 +155,10 @@ static int rpl_do_srh_inline(struct sk_buff *skb, const struct rpl_lwt *rlwt,
hdrlen = ((csrh->hdrlen + 1) << 3);
err = skb_cow_head(skb, hdrlen + skb->mac_len);
if (unlikely(err))
if (unlikely(err)) {
kfree(buf);
return err;
}
skb_pull(skb, sizeof(struct ipv6hdr));
skb_postpull_rcsum(skb, skb_network_header(skb),