linux-kernel - Re: [PATCH net] vsock: prevent unnecessary refcnt inc for nonblocking connect

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Message-ID: <20211108083013.svl77coopyryngfl@steredhat>
Date:   Mon, 8 Nov 2021 09:30:13 +0100
From:   Stefano Garzarella <sgarzare@...hat.com>
To:     Eiichi Tsukata <eiichi.tsukata@...anix.com>
Cc:     davem@...emloft.net, kuba@...nel.org,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net] vsock: prevent unnecessary refcnt inc for
 nonblocking connect

On Sun, Nov 07, 2021 at 12:03:04PM +0000, Eiichi Tsukata wrote:
>Currently vosck_connect() increments sock refcount for nonblocking
>socket each time it's called, which can lead to memory leak if
>it's called multiple times because connect timeout function decrements
>sock refcount only once.
>
>Fixes it by making vsock_connect() return -EALREADY immediately when
>sock state is already SS_CONNECTING.
>
>Signed-off-by: Eiichi Tsukata <eiichi.tsukata@...anix.com>
>---
> net/vmw_vsock/af_vsock.c | 2 ++
> 1 file changed, 2 insertions(+)

Make sense to me, thanks for fixing this issue!
I think would be better to add the Fixes ref in the commit message:

Fixes: d021c344051a ("VSOCK: Introduce VM Sockets")

With that:
Reviewed-by: Stefano Garzarella <sgarzare@...hat.com>

Thanks,
Stefano