From: Al Viro <viro@ZenIV•linux.org.uk>
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>,
"weiyongjun (A)" <weiyongjun1@huawei•com>
Subject: Re: [PATCH v2] iov_iter: don't revert iov buffer if csum error
Date: Sat, 29 Apr 2017 03:46:47 +0100 [thread overview]
Message-ID: <20170429024647.GO29622@ZenIV.linux.org.uk> (raw)
In-Reply-To: <d1ef9185-0956-aed9-e44b-84458cf28764@huawei.com>
On Sat, Apr 29, 2017 at 10:38:48AM +0800, Ding Tianhong wrote:
> The patch 327868212381 (make skb_copy_datagram_msg() et.al. preserve
> ->msg_iter on error) will revert the iov buffer if copy to iter
> failed, but it didn't copy any datagram if the skb_checksum_complete
> error, so no need to revert any data at this place.
The bug is real, but I would suggest a simpler fix:
if (__skb_checksum_complete(skb))
return -EINVAL;
leaving the rest as-is.
next prev parent reply other threads:[~2017-04-29 2:47 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-29 2:38 [PATCH v2] iov_iter: don't revert iov buffer if csum error Ding Tianhong
2017-04-29 2:46 ` Al Viro [this message]
2017-04-29 9:37 ` Ding Tianhong
2017-04-29 20:48 ` Al Viro
2017-05-01 2:52 ` David Miller
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