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Date:	Thu, 15 Nov 2007 18:54:03 -0800 (PST)
From:	David Miller <>
Subject: Re: [PATCH 1/2] [IPV4] UDP: Always checksum even if without socket

From: Wang Chen <>
Date: Fri, 16 Nov 2007 10:46:26 +0800

> The current kernel doesn't verify the udp checksum if user doesn't set a
> socket filter.It's fine for LAN. But for WAN, it's not a good option.
> Shall we fix it? Below is the patch to make udp checksum be always 
> available.
> [IPV4] UDP: Always checksum even if without socket filter
> Make udp checksum be always available even if without socket filter.
> Signed-off-by: Wang Chen <>

It checks the checksum in udp_recvmsg() and udp_poll().

Please do not fix bugs via code inspection without writing
test programs to validate whether there is really a "bug"
here or not.
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