From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric Dumazet <dada1@cosmosbay.com>
Subject: Re: What is lock_sock() before skb_free_datagram() for?
Date: Sat, 18 Apr 2009 10:09:57 +0200
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References: <200904181704.FDC21361.FQLOFHOOSVFtMJ@I-love.SAKURA.ne.jp>
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Cc: netdev@vger.kernel.org
To: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
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Tetsuo Handa a =E9crit :
> Hello.
>=20
> udp_recvmsg() and udpv6_recvmsg() call skb_free_datagram() with=20
> lock_sock().
> But raw_recvmsg() and rawv6_recvmsg() call skb_free_datagram()=20
> without
> lock_sock().
> Is it OK?

Yes it is.

UDP protocol has memory accounting in recent kernels, not RAW.