diff options
| author | Kumar Sanghvi <kumar.sanghvi@stericsson.com> | 2010-09-27 23:10:42 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-10-28 21:44:07 -0700 |
| commit | 81f9ffe4909999ea0608b8a77e7aa289cba84bf8 (patch) | |
| tree | 96697838cb1599a5082ed1b85e9fa20ae4641452 | |
| parent | a39fcb1368a3b3ea991baac85d6b6b032b079b7d (diff) | |
Phonet: Correct header retrieval after pskb_may_pull
[ Upstream commit a91e7d471e2e384035b9746ea707ccdcd353f5dd ]
Retrieve the header after doing pskb_may_pull since, pskb_may_pull
could change the buffer structure.
This is based on the comment given by Eric Dumazet on Phonet
Pipe controller patch for a similar problem.
Signed-off-by: Kumar Sanghvi <kumar.sanghvi@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | net/phonet/pep.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/phonet/pep.c b/net/phonet/pep.c index 5f32d217535b..9cdd35e78759 100644 --- a/net/phonet/pep.c +++ b/net/phonet/pep.c @@ -224,12 +224,13 @@ static void pipe_grant_credits(struct sock *sk) static int pipe_rcv_status(struct sock *sk, struct sk_buff *skb) { struct pep_sock *pn = pep_sk(sk); - struct pnpipehdr *hdr = pnp_hdr(skb); + struct pnpipehdr *hdr; int wake = 0; if (!pskb_may_pull(skb, sizeof(*hdr) + 4)) return -EINVAL; + hdr = pnp_hdr(skb); if (hdr->data[0] != PN_PEP_TYPE_COMMON) { LIMIT_NETDEBUG(KERN_DEBUG"Phonet unknown PEP type: %u\n", (unsigned)hdr->data[0]); |