4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Nogah Frankel <nogahf@xxxxxxxxxxxx> [ 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@xxxxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- 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) {