From: Eric Dumazet <edumazet@google.com>
To: "David S . Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Paolo Abeni <pabeni@redhat.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>,
Cong Wang <xiyou.wangcong@gmail.com>,
Jiri Pirko <jiri@resnulli.us>,
netdev@vger.kernel.org, eric.dumazet@gmail.com,
Eric Dumazet <edumazet@google.com>,
syzbot <syzkaller@googlegroups.com>,
Simon Horman <simon.horman@corigine.com>,
Ido Schimmel <idosch@nvidia.com>
Subject: [PATCH net] net: flower: fix stack-out-of-bounds in fl_set_key_cfm()
Date: Mon, 24 Jul 2023 16:32:54 +0000 [thread overview]
Message-ID: <20230724163254.106178-1-edumazet@google.com> (raw)
Typical misuse of
nla_parse_nested(array, XXX_MAX, ...);
array must be declared as
struct nlattr *array[XXX_MAX + 1];
Fixes: 7cfffd5fed3e ("net: flower: add support for matching cfm fields")
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Simon Horman <simon.horman@corigine.com>
Cc: Ido Schimmel <idosch@nvidia.com>
---
net/sched/cls_flower.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c
index 8da9d039d964ea417700a2f59ad95a9ce52f5eab..3c7a272bf7c7cf7d4ae21b5370cbc428086d6979 100644
--- a/net/sched/cls_flower.c
+++ b/net/sched/cls_flower.c
@@ -1709,7 +1709,7 @@ static int fl_set_key_cfm(struct nlattr **tb,
struct fl_flow_key *mask,
struct netlink_ext_ack *extack)
{
- struct nlattr *nla_cfm_opt[TCA_FLOWER_KEY_CFM_OPT_MAX];
+ struct nlattr *nla_cfm_opt[TCA_FLOWER_KEY_CFM_OPT_MAX + 1];
int err;
if (!tb[TCA_FLOWER_KEY_CFM])
--
2.41.0.487.g6d72f3e995-goog
next reply other threads:[~2023-07-24 16:33 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-24 16:32 Eric Dumazet [this message]
2023-07-24 16:38 ` [PATCH net] net: flower: fix stack-out-of-bounds in fl_set_key_cfm() Eric Dumazet
2023-07-25 6:44 ` Zahari Doychev
2023-07-25 12:04 ` Ido Schimmel
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