From 9cec2aaffe969f2a3e18b5ec105fc20bb908e475 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <error27@gmail.com>
Date: Mon, 6 Feb 2023 16:18:32 +0300
Subject: [PATCH] net: sched: sch: Fix off by one in htb_activate_prios()
The > needs be >= to prevent an out of bounds access.
Fixes: de5ca4c3852f ("net: sched: sch: Bounds check priority")
Signed-off-by: Dan Carpenter <error27@gmail.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/Y+D+KN18FQI2DKLq@kili
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
net/sched/sch_htb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c
index cc28e41fb745c..92f2975b6a827 100644
--- a/net/sched/sch_htb.c
+++ b/net/sched/sch_htb.c
@@ -433,7 +433,7 @@ static void htb_activate_prios(struct htb_sched *q, struct htb_class *cl)
while (m) {
unsigned int prio = ffz(~m);
- if (WARN_ON_ONCE(prio > ARRAY_SIZE(p->inner.clprio)))
+ if (WARN_ON_ONCE(prio >= ARRAY_SIZE(p->inner.clprio)))
break;
m &= ~(1 << prio);