netdev - Re: [PATCH] LSM: Update comment on security_sock_rcv

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Message-ID: <20100106032742.GA8627@us.ibm.com>
Date:	Tue, 5 Jan 2010 21:27:42 -0600
From:	"Serge E. Hallyn" <serue@...ibm.com>
To:	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
Cc:	linux-security-module@...r.kernel.org, jmorris@...ei.org,
	sam@...ack.fr, kaber@...sh.net, zbr@...emap.net,
	nhorman@...driver.com, netdev@...r.kernel.org,
	netfilter-devel@...r.kernel.org, hadi@...erus.ca
Subject: Re: [PATCH] LSM: Update comment on security_sock_rcv_skb

Quoting Tetsuo Handa (penguin-kernel@...ove.SAKURA.ne.jp):
> [PATCH] LSM: Update comment on security_sock_rcv_skb
> 
> It is not permitted to do sleeping operation inside security_sock_rcv_skb().
> 
> Signed-off-by: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>

Acked-by: Serge Hallyn <serue@...ibm.com>

Thank you for sending this.

-serge

> --
> diff --git a/include/linux/security.h b/include/linux/security.h
> index 466cbad..3696ca3 100644
> --- a/include/linux/security.h
> +++ b/include/linux/security.h
> @@ -978,6 +978,7 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
>   *	Check permissions on incoming network packets.  This hook is distinct
>   *	from Netfilter's IP input hooks since it is the first time that the
>   *	incoming sk_buff @skb has been associated with a particular socket, @sk.
> + *	Must not sleep inside this hook because some callers hold spinlocks.
>   *	@sk contains the sock (not socket) associated with the incoming sk_buff.
>   *	@skb contains the incoming network data.
>   * @socket_getpeersec_stream:
> --
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