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Message-ID: <1289341724.7380.13.camel@dan> Date: Tue, 09 Nov 2010 17:28:44 -0500 From: Dan Rosenberg <drosenberg@...curity.com> To: netdev@...r.kernel.org Cc: stable@...nel.org, security@...nel.org Subject: [PATCH] Prevent reading uninitialized memory with socket filters 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@...curity.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. */ -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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