From: Sabrina Dubroca <sd@queasysnail.net>
To: Ding Tianhong <dingtianhong@huawei.com>
Cc: David Miller <davem@davemloft.net>,
pabeni@redhat.com, edumazet@google.com,
hannes@stressinduktion.org,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
LinuxArm <linuxarm@huawei.com>
Subject: Re: [PATCH] iov_iter: don't revert if csum error
Date: Fri, 28 Apr 2017 15:16:31 +0200 [thread overview]
Message-ID: <20170428131631.GA22996@bistromath.localdomain> (raw)
In-Reply-To: <080dafec-c57f-0546-4d2f-ce4a31222e25@huawei.com>
2017-04-28, 20:48:45 +0800, Ding Tianhong wrote:
> The patch 3278682 (make skb_copy_datagram_msg() et.al. preserve
> ->msg_iter on error) will revert the iov buffer if copy to iter
> failed, but it looks no need to revert for csum error, so fix it.
>
> Fixes: 3278682 ("make skb_copy_datagram_msg() et.al. preserve->msg_iter on error")
Please use 12 digits, ie 327868212381.
> Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
> ---
> net/core/datagram.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/net/core/datagram.c b/net/core/datagram.c
> index f4947e7..475a8e9 100644
> --- a/net/core/datagram.c
> +++ b/net/core/datagram.c
> @@ -760,7 +760,7 @@ int skb_copy_and_csum_datagram_msg(struct sk_buff *skb,
>
> if (msg_data_left(msg) < chunk) {
> if (__skb_checksum_complete(skb))
> - goto csum_error;
> + goto fault;
With this patch, skb_copy_and_csum_datagram_msg() will return -EFAULT
for an incorrect checksum, that doesn't seem right.
> if (skb_copy_datagram_msg(skb, hlen, msg, chunk))
> goto fault;
> } else {
> --
> 1.8.3.1
>
--
Sabrina
next prev parent reply other threads:[~2017-04-28 13:16 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-28 12:48 [PATCH] iov_iter: don't revert if csum error Ding Tianhong
2017-04-28 13:16 ` Sabrina Dubroca [this message]
2017-04-28 13:51 ` David Laight
2017-04-29 2:12 ` Ding Tianhong
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