netdev - [PATCH net 1/4] nexthop: Fix off-by-one error in error path

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Message-Id: <20210107144824.1135691-2-idosch@idosch.org>
Date:   Thu,  7 Jan 2021 16:48:21 +0200
From:   Ido Schimmel <idosch@...sch.org>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, petrm@...dia.com,
        dsahern@...il.com, roopa@...dia.com, nikolay@...dia.com,
        mlxsw@...dia.com, Ido Schimmel <idosch@...dia.com>
Subject: [PATCH net 1/4] nexthop: Fix off-by-one error in error path

From: Ido Schimmel <idosch@...dia.com>

A reference was not taken for the current nexthop entry, so do not try
to put it in the error path.

Fixes: 430a049190de ("nexthop: Add support for nexthop groups")
Signed-off-by: Ido Schimmel <idosch@...dia.com>
Reviewed-by: Petr Machata <petrm@...dia.com>
---
 net/ipv4/nexthop.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv4/nexthop.c b/net/ipv4/nexthop.c
index 5e1b22d4f939..f8035cfa9c20 100644
--- a/net/ipv4/nexthop.c
+++ b/net/ipv4/nexthop.c
@@ -1459,7 +1459,7 @@ static struct nexthop *nexthop_create_group(struct net *net,
 	return nh;
 
 out_no_nh:
-	for (; i >= 0; --i)
+	for (i--; i >= 0; --i)
 		nexthop_put(nhg->nh_entries[i].nh);
 
 	kfree(nhg->spare);
-- 
2.29.2