From: Dan Rosenberg <drosenberg@vsecurity.com>
To: netdev@vger.kernel.org
Cc: stable@kernel.org, security@kernel.org
Subject: [PATCH] Prevent reading uninitialized memory with socket filters
Date: Tue, 09 Nov 2010 17:28:44 -0500 [thread overview]
Message-ID: <1289341724.7380.13.camel@dan> (raw)
The "mem" array used as scratch space for socket filters is not
initialized, allowing unprivileged users to leak kernel stack bytes.
Signed-off-by: Dan Rosenberg <drosenberg@vsecurity.com>
---
net/core/filter.c | 2 ++
1 file changed, 2 insertions(+), 0 deletions(-)
diff --git a/net/core/filter.c b/net/core/filter.c
index 7beaec3..2749ba0 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -121,6 +121,8 @@ unsigned int sk_run_filter(struct sk_buff *skb, struct sock_filter *filter, int
int k;
int pc;
+ memset(mem, 0, sizeof(mem));
+
/*
* Process array of filter instructions.
*/
next reply other threads:[~2010-11-09 22:28 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-09 22:28 Dan Rosenberg [this message]
2010-11-09 23:03 ` [PATCH] Prevent reading uninitialized memory with socket filters Joe Perches
2010-11-10 5:28 ` David Miller
2010-11-10 5:53 ` Eric Dumazet
2010-11-10 7:22 ` Eric Dumazet
2010-11-10 14:25 ` [PATCH] Prevent reading uninitialized memory with socketfilters Tetsuo Handa
2010-11-10 18:32 ` David Miller
2010-11-10 18:39 ` David Miller
2010-11-10 20:57 ` Ben Hutchings
2010-11-10 20:59 ` David Miller
2010-11-10 21:25 ` Ben Hutchings
2010-11-10 11:12 ` [PATCH] Prevent reading uninitialized memory with socket filters Dan Rosenberg
2010-11-10 13:19 ` Dan Rosenberg
2010-11-10 18:07 ` David Miller
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