netdev - [PATCH] LSM: Update comment on security_sock_rcv

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Date:	Wed, 06 Jan 2010 09:23:54 +0900
From:	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
To:	linux-security-module@...r.kernel.org, jmorris@...ei.org
Cc:	serue@...ibm.com, 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: [PATCH] LSM: Update comment on security_sock_rcv_skb

[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>
--
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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