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[PPP] generic: Call skb_cow_head before scribbling over skb
authorHerbert Xu <herbert@gondor.apana.org.au>
Sun, 16 Sep 2007 23:21:42 +0000 (16:21 -0700)
committerDavid S. Miller <davem@davemloft.net>
Sun, 16 Sep 2007 23:21:42 +0000 (16:21 -0700)
It's rude to write over data that other people are still using.  So call
skb_cow_head before PPP proceeds to modify the skb data.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

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