| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.14 112/159] net_sched: red: Avoid devision by zero | Date | Fri, 23 Feb 2018 19:27:00 +0100 |
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4.14-stable review patch. If anyone has any objections, please let me know.
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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) {
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