From: Cong Wang <xiyou.wangcong@gmail.com>
To: Wang Yufen <wangyufen@huawei.com>
Cc: john.fastabend@gmail.com, daniel@iogearbox.net,
jakub@cloudflare.com, lmb@cloudflare.com, davem@davemloft.net,
edumazet@google.com, yoshfuji@linux-ipv6.org, dsahern@kernel.org,
kuba@kernel.org, ast@kernel.org, andrii@kernel.org, kafai@fb.com,
songliubraving@fb.com, yhs@fb.com, kpsingh@kernel.org,
netdev@vger.kernel.org, bpf@vger.kernel.org
Subject: Re: [PATCH bpf-next v2 2/4] bpf, sockmap: Fix memleak in tcp_bpf_sendmsg while sk msg is full
Date: Wed, 2 Mar 2022 16:48:25 -0800 [thread overview]
Message-ID: <YiAQWaVPEmfpiale@pop-os.localdomain> (raw)
In-Reply-To: <20220302022755.3876705-3-wangyufen@huawei.com>
On Wed, Mar 02, 2022 at 10:27:53AM +0800, Wang Yufen wrote:
> diff --git a/net/ipv4/tcp_bpf.c b/net/ipv4/tcp_bpf.c
> index 9b9b02052fd3..ac9f491cc139 100644
> --- a/net/ipv4/tcp_bpf.c
> +++ b/net/ipv4/tcp_bpf.c
> @@ -421,8 +421,10 @@ static int tcp_bpf_sendmsg(struct sock *sk, struct msghdr *msg, size_t size)
> osize = msg_tx->sg.size;
> err = sk_msg_alloc(sk, msg_tx, msg_tx->sg.size + copy, msg_tx->sg.end - 1);
> if (err) {
> - if (err != -ENOSPC)
> + if (err != -ENOSPC) {
> + sk_msg_trim(sk, msg_tx, osize);
> goto wait_for_memory;
Is it a good idea to handle this logic inside sk_msg_alloc()?
next prev parent reply other threads:[~2022-03-03 0:48 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-02 2:27 [PATCH bpf-next v2 0/4] bpf, sockmap: Fix memleaks and issues of mem charge/uncharge Wang Yufen
2022-03-02 2:27 ` [PATCH bpf-next v2 1/4] bpf, sockmap: Fix memleak in sk_psock_queue_msg Wang Yufen
2022-03-03 0:41 ` Cong Wang
2022-03-04 6:45 ` wangyufen
2022-03-02 2:27 ` [PATCH bpf-next v2 2/4] bpf, sockmap: Fix memleak in tcp_bpf_sendmsg while sk msg is full Wang Yufen
2022-03-03 0:48 ` Cong Wang [this message]
2022-03-04 6:51 ` wangyufen
2022-03-02 2:27 ` [PATCH bpf-next v2 3/4] bpf, sockmap: Fix more uncharged while msg has more_data Wang Yufen
2022-03-03 6:14 ` Cong Wang
2022-03-04 7:08 ` wangyufen
2022-03-02 2:27 ` [PATCH bpf-next v2 4/4] bpf, sockmap: Fix double uncharge the mem of sk_msg Wang Yufen
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