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Phonet: fix aligned-mode pipe socket buffer header reserve

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When the pipe uses aligned-mode data packets, we must reserve 4 bytes
instead of 3 for the pipe protocol header. Otherwise the Phonet header
would not be aligned, resulting in potentially corrupted headers with
later unaligned memory writes.

Signed-off-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Rémi Denis-Courmont 2011-03-15 14:55:49 -07:00 committed by David S. Miller
parent bfd823bd74
commit 638be34459
1 changed files with 1 additions and 1 deletions
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2
net/phonet/pep.c
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@ -1055,7 +1055,7 @@ static int pep_sendmsg(struct kiocb *iocb, struct sock *sk,
if (!skb)
return err;
skb_reserve(skb, MAX_PHONET_HEADER + 3);
skb_reserve(skb, MAX_PHONET_HEADER + 3 + pn->aligned);
err = memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len);
if (err < 0)
goto outfree;