From: Zheng Yongjun <zhengyongjun3@huawei.com>
To: <davem@davemloft.net>, <yoshfuji@linux-ipv6.org>,
<dsahern@kernel.org>, <kuba@kernel.org>, <netdev@vger.kernel.org>,
<linux-kernel@vger.kernel.org>
Cc: Zheng Yongjun <zhengyongjun3@huawei.com>
Subject: [PATCH] ping: Check return value of function 'ping_queue_rcv_skb'
Date: Mon, 7 Jun 2021 17:10:58 +0800 [thread overview]
Message-ID: <20210607091058.2766648-1-zhengyongjun3@huawei.com> (raw)
Function 'ping_queue_rcv_skb' not always return success, which will
also return fail. If not check the wrong return value of it, lead to function
`ping_rcv` return success.
Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com>
---
net/ipv4/ping.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/net/ipv4/ping.c b/net/ipv4/ping.c
index 1c9f71a37258..8e84cde95011 100644
--- a/net/ipv4/ping.c
+++ b/net/ipv4/ping.c
@@ -968,10 +968,11 @@ bool ping_rcv(struct sk_buff *skb)
struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
pr_debug("rcv on socket %p\n", sk);
- if (skb2)
- ping_queue_rcv_skb(sk, skb2);
+ if (skb2 && !ping_queue_rcv_skb(sk, skb2)) {
+ sock_put(sk);
+ return true;
+ }
sock_put(sk);
- return true;
}
pr_debug("no socket, dropping\n");
--
2.25.1
next reply other threads:[~2021-06-07 8:57 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-07 9:10 Zheng Yongjun [this message]
2021-06-07 16:26 ` [PATCH] ping: Check return value of function 'ping_queue_rcv_skb' David Ahern
2021-06-08 1:48 ` 答复: " zhengyongjun
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