From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Fri, 9 Oct 2009 04:43:40 +0000 (+0000)
Subject: udp: Fix udp_poll() and ioctl()
X-Git-Tag: v2.6.32-rc5~13^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=85584672012ee0c3b7b8e033a1ecf7c11878e45f;p=pandora-kernel.git

udp: Fix udp_poll() and ioctl()

udp_poll() can in some circumstances drop frames with incorrect checksums.

Problem is we now have to lock the socket while dropping frames, or risk
sk_forward corruption.

This bug is present since commit 95766fff6b9a78d1
([UDP]: Add memory accounting.)

While we are at it, we can correct ioctl(SIOCINQ) to also drop bad frames.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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