[PATCH 3.16.y-ckt 127/128] udp: properly support MSG_PEEK with truncated buffers

[Ben Hutchings]

On Sun, 2016-01-24 at 22:01 +0000, Luis Henriques wrote:
> 3.16.7-ckt23 -stable review patch.  If anyone has any objections, please let me know.
> 
> ---8<------------------------------------------------------------
> 
> From: Eric Dumazet <edumazet at google.com>
> 
> commit 197c949e7798fbf28cfadc69d9ca0c2abbf93191 upstream.
[...]

Please also revert commit fa89ae5548ed282f0ceb4660b3b93e4e2ee875f3
which was the previous attempt to fix this.

Ben.

-- 
Ben Hutchings
Klipstein's 4th Law of Prototyping and Production:
                                    A fail-safe circuit will destroy others.
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