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net_sched: red: Avoid illegal values

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Check the qmin & qmax values doesn't overflow for the given Wlog value.
Check that qmin <= qmax.

Fixes: a783474591 ("[PKT_SCHED]: Generic RED layer")
Signed-off-by: Nogah Frankel <nogahf@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nogah Frankel
2017-12-04 13:31:11 +02:00
committed by David S. Miller
parent 5c47220342
commit 8afa10cbe2
5 changed files with 22 additions and 0 deletions
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3
net/sched/sch_sfq.c
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@@ -639,6 +639,9 @@ static int sfq_change(struct Qdisc *sch, struct nlattr *opt)
if (ctl->divisor &&
(!is_power_of_2(ctl->divisor) || ctl->divisor > 65536))
return -EINVAL;
if (ctl_v1 && !red_check_params(ctl_v1->qth_min, ctl_v1->qth_max,
ctl_v1->Wlog))
return -EINVAL;
if (ctl_v1 && ctl_v1->qth_min) {
p = kmalloc(sizeof(*p), GFP_KERNEL);
if (!p)