Commit fdd1a810 authored May 03, 2019 by Dan Carpenter Committed by David S. Miller May 05, 2019

net: atm: clean up a range check



The code works fine but the problem is that check for negatives is a
no-op:

	if (arg < 0)
		i = 0;

The "i" value isn't used.  We immediately overwrite it with:

	i = array_index_nospec(arg, MAX_LEC_ITF);

The array_index_nospec() macro returns zero if "arg" is out of bounds so
this works, but the dead code is confusing and it doesn't look very
intentional.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 6ffe0acc

net/atm/lec.c

+1 −3

Original line number	Diff line number	Diff line
		@@ -726,9 +726,7 @@ static int lecd_attach(struct atm_vcc *vcc, int arg)
		struct lec_priv *priv;

		if (arg < 0)
		i = 0;
		else
		i = arg;
		arg = 0;
		if (arg >= MAX_LEC_ITF)
		return -EINVAL;
		i = array_index_nospec(arg, MAX_LEC_ITF);