From 5b11eef8e3d3e3b2ce9aae50f6ab4fd8451cfc5b Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Fri, 10 Sep 2010 01:56:16 +0000 Subject: net/llc: make opt unsigned in llc_ui_setsockopt() commit 339db11b219f36cf7da61b390992d95bb6b7ba2e upstream. The members of struct llc_sock are unsigned so if we pass a negative value for "opt" it can cause a sign bug. Also it can cause an integer overflow when we multiply "opt * HZ". Signed-off-by: Dan Carpenter Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/llc/af_llc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/llc/af_llc.c b/net/llc/af_llc.c index 023ba820236..58261299821 100644 --- a/net/llc/af_llc.c +++ b/net/llc/af_llc.c @@ -1024,7 +1024,8 @@ static int llc_ui_setsockopt(struct socket *sock, int level, int optname, { struct sock *sk = sock->sk; struct llc_sock *llc = llc_sk(sk); - int rc = -EINVAL, opt; + unsigned int opt; + int rc = -EINVAL; lock_sock(sk); if (unlikely(level != SOL_LLC || optlen != sizeof(int))) -- cgit v1.2.3