From: Nogah Frankel <nogahf@mellanox.com>
Date: Mon, 4 Dec 2017 13:31:10 +0200
Subject: net_sched: red: Avoid devision by zero
Patch-mainline: v4.15-rc3
Git-commit: 5c472203421ab4f928aa1ae9e1dbcfdd80324148
References: bsc#1056787
Do not allow delta value to be zero since it is used as a divisor.
Fixes: 8af2a218de38 ("sch_red: Adaptative RED AQM")
Signed-off-by: Nogah Frankel <nogahf@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
include/net/red.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/include/net/red.h
+++ b/include/net/red.h
@@ -178,7 +178,7 @@ static inline void red_set_parms(struct
p->qth_max = qth_max << Wlog;
p->Wlog = Wlog;
p->Plog = Plog;
- if (delta < 0)
+ if (delta <= 0)
delta = 1;
p->qth_delta = delta;
if (!max_P) {