| 1 |
From 44315cc76567e2d911d56091665637e305af182d Mon Sep 17 00:00:00 2001 |
| 2 |
From: Konstantin Sharlaimov <konstantin.sharlaimov@gmail.com> |
| 3 |
Date: Mon, 24 Sep 2007 23:01:54 +0200 |
| 4 |
Subject: [PATCH] [PPP]: Fix osize too small errors when decoding mppe. |
| 5 |
|
| 6 |
The mppe_decompress() function required a buffer that is 1 byte too |
| 7 |
small when receiving a message of mru size. This fixes buffer |
| 8 |
allocation to prevent this from occurring. |
| 9 |
|
| 10 |
Signed-off-by: Konstantin Sharlaimov <konstantin.sharlaimov@gmail.com> |
| 11 |
Signed-off-by: David S. Miller <davem@davemloft.net> |
| 12 |
Signed-off-by: Adrian Bunk <bunk@kernel.org> |
| 13 |
--- |
| 14 |
drivers/net/ppp_generic.c | 13 ++++++++++++- |
| 15 |
1 files changed, 12 insertions(+), 1 deletions(-) |
| 16 |
|
| 17 |
diff --git a/drivers/net/ppp_generic.c b/drivers/net/ppp_generic.c |
| 18 |
index e37648c..802f249 100644 |
| 19 |
--- a/drivers/net/ppp_generic.c |
| 20 |
+++ b/drivers/net/ppp_generic.c |
| 21 |
@@ -1721,7 +1721,18 @@ ppp_decompress_frame(struct ppp *ppp, struct sk_buff *skb) |
| 22 |
goto err; |
| 23 |
|
| 24 |
if (proto == PPP_COMP) { |
| 25 |
- ns = dev_alloc_skb(ppp->mru + PPP_HDRLEN); |
| 26 |
+ int obuff_size; |
| 27 |
+ |
| 28 |
+ switch(ppp->rcomp->compress_proto) { |
| 29 |
+ case CI_MPPE: |
| 30 |
+ obuff_size = ppp->mru + PPP_HDRLEN + 1; |
| 31 |
+ break; |
| 32 |
+ default: |
| 33 |
+ obuff_size = ppp->mru + PPP_HDRLEN; |
| 34 |
+ break; |
| 35 |
+ } |
| 36 |
+ |
| 37 |
+ ns = dev_alloc_skb(obuff_size); |
| 38 |
if (ns == 0) { |
| 39 |
printk(KERN_ERR "ppp_decompress_frame: no memory\n"); |
| 40 |
goto err; |
| 41 |
-- |
| 42 |
1.6.5.1 |
| 43 |
|
Parent Directory
| 
Revision Log
| 
Revision Graph
