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[PPP]: Fix osize too small errors when decoding mppe. 

The mppe_decompress() function required a buffer that is 1 byte too
small when receiving a message of mru size. This fixes buffer
allocation to prevent this from occurring.

Signed-off-by: Konstantin Sharlaimov <konstantin.sharlaimov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Konstantin Sharlaimov 2007-06-23 23:05:54 -07:00 committed by David S. Miller
parent 7e4a6da7c2
commit 4b2a8fb3a7
1 changed files with 12 additions and 1 deletions
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13
drivers/net/ppp_generic.c
View File

@ -1708,7 +1708,18 @@ ppp_decompress_frame(struct ppp *ppp, struct sk_buff *skb)
goto err;
if (proto == PPP_COMP) {
ns = dev_alloc_skb(ppp->mru + PPP_HDRLEN);
int obuff_size;
switch(ppp->rcomp->compress_proto) {
case CI_MPPE:
obuff_size = ppp->mru + PPP_HDRLEN + 1;
break;
default:
obuff_size = ppp->mru + PPP_HDRLEN;
break;
}
ns = dev_alloc_skb(obuff_size);
if (ns == 0) {
printk(KERN_ERR "ppp_decompress_frame: no memory\n");
goto err;