Patch "net_sched: red: Avoid devision by zero" has been added to the 4.14-stable tree

Patch "net_sched: red: Avoid devision by zero" has been added to the 4.14-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    net_sched: red: Avoid devision by zero

to the 4.14-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     net_sched-red-avoid-devision-by-zero.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Fri Feb 23 11:45:09 CET 2018
From: Nogah Frankel <nogahf@mellanox.com>
Date: Mon, 4 Dec 2017 13:31:10 +0200
Subject: net_sched: red: Avoid devision by zero

From: Nogah Frankel <nogahf@mellanox.com>


[ Upstream commit 5c472203421ab4f928aa1ae9e1dbcfdd80324148 ]

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>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 include/net/red.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/include/net/red.h
+++ b/include/net/red.h
@@ -179,7 +179,7 @@ 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) {


Patches currently in stable-queue which might be from nogahf@mellanox.com are

queue-4.14/net_sched-red-avoid-devision-by-zero.patch
queue-4.14/net_sched-red-avoid-illegal-values.patch