diff options
| author |   Herbert Xu <herbert@gondor.apana.org.au> | 2008-06-10 14:08:25 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2008-06-10 14:08:25 -0700 |
| commit | bc6cffd177f9266af38dba96a2cea06c1e7ff932 (patch) | |
| tree | 3d18d0ff6a5e72588ab154b65fe3d8649ffbc477 /drivers/net/pppoe.c | |
| parent | net pppoe: Check packet length on all receive paths (diff) | |
| download | linux-dev-bc6cffd177f9266af38dba96a2cea06c1e7ff932.tar.xz linux-dev-bc6cffd177f9266af38dba96a2cea06c1e7ff932.zip | |
pppoe: Unshare skb before anything else
We need to unshare the skb first as otherwise pskb_may_pull may
write to a shared skb which could be bad.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/pppoe.c')
| -rw-r--r-- | drivers/net/pppoe.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/net/pppoe.c b/drivers/net/pppoe.c index d89ccfd6650c..bafb69b6f7cb 100644 --- a/drivers/net/pppoe.c +++ b/drivers/net/pppoe.c @@ -432,12 +432,12 @@ static int pppoe_disc_rcv(struct sk_buff *skb, if (dev_net(dev) != &init_net) goto abort; - if (!pskb_may_pull(skb, sizeof(struct pppoe_hdr))) - goto abort; - if (!(skb = skb_share_check(skb, GFP_ATOMIC))) goto out; + if (!pskb_may_pull(skb, sizeof(struct pppoe_hdr))) + goto abort; + ph = pppoe_hdr(skb); if (ph->code != PADT_CODE) goto abort; |