[23/80] net/llc: make opt unsigned in llc_ui_setsockopt()

Greg KH
2010-09-24T16:57:22Z

From: Dan Carpenter <error27@gmail.com>

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 <error27@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
net/llc/af_llc.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

--- a/net/llc/af_llc.c
+++ b/net/llc/af_llc.c
@@ -1024,7 +1024,8 @@ static int llc_ui_setsockopt(struct sock
{
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)))