From: Eric Dumazet <eric.dumazet@gmail.com>
To: Jason Wang <jasowang@redhat.com>
Cc: netdev@vger.kernel.org, xma@us.ibm.com, davem@davemloft.net,
linux-kernel@vger.kernel.org, mst@redhat.com,
ebiederm@xmission.com
Subject: Re: [PATCH 3/6] macvtap: zerocopy: validate vector length before pinning user pages
Date: Tue, 17 Apr 2012 07:33:28 +0200 [thread overview]
Message-ID: <1334640808.2472.6.camel@edumazet-glaptop> (raw)
In-Reply-To: <4F8BD68F.7070708@redhat.com>
On Mon, 2012-04-16 at 16:21 +0800, Jason Wang wrote:
> Hi:
> On 04/16/2012 02:53 PM, Eric Dumazet wrote:
> if ((num_pages != size) ||
> >> (num_pages> MAX_SKB_FRAGS - skb_shinfo(skb)->nr_frags))
> >>
> > Hi Jason
> >
> > Why is -EFAULT the right error code ?
>
> E2BIG or is there any error code you prefer?
Might be good yes.
However it sounds strange user cant write any size he wants (and kernel
needs to build several skbs to fulfill user request)
next prev parent reply other threads:[~2012-04-17 5:33 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-16 6:07 [PATCH 1/6] macvtap: zerocopy: fix offset calculation when building skb Jason Wang
2012-04-16 6:07 ` [PATCH 2/6] macvtap: zerocopy: fix truesize underestimation Jason Wang
2012-04-16 7:14 ` Michael S. Tsirkin
2012-04-16 8:23 ` Jason Wang
2012-04-16 8:49 ` Eric Dumazet
2012-04-16 13:25 ` Michael S. Tsirkin
2012-04-16 6:08 ` [PATCH 3/6] macvtap: zerocopy: validate vector length before pinning user pages Jason Wang
2012-04-16 6:53 ` Eric Dumazet
2012-04-16 8:21 ` Jason Wang
2012-04-17 5:33 ` Eric Dumazet [this message]
2012-04-17 5:43 ` Michael S. Tsirkin
2012-04-17 6:19 ` Michael S. Tsirkin
2012-04-16 7:58 ` Michael S. Tsirkin
2012-04-16 6:08 ` [PATCH 4/6] macvtap: zerocopy: set SKBTX_DEV_ZEROCOPY only when skb is built successfully Jason Wang
2012-04-16 6:08 ` [PATCH 5/6] vhost_net: fix use after free of vq->ubufs Jason Wang
2012-04-16 13:28 ` Michael S. Tsirkin
2012-04-17 3:19 ` Jason Wang
2012-04-17 10:22 ` Michael S. Tsirkin
2012-04-17 10:47 ` Jason Wang
2012-04-16 6:08 ` [PATCH 6/6] vhost_net: don't poll on -EFAULT Jason Wang
2012-04-16 7:16 ` Michael S. Tsirkin
2012-04-16 8:28 ` Jason Wang
2012-04-16 13:39 ` Michael S. Tsirkin
2012-04-17 3:27 ` Jason Wang
2012-04-17 4:57 ` Michael S. Tsirkin
2012-04-17 5:54 ` Jason Wang
2012-04-17 6:07 ` Michael S. Tsirkin
2012-04-17 6:30 ` Jason Wang
2012-04-17 10:18 ` Michael S. Tsirkin
2012-04-17 10:46 ` Jason Wang
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