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Date:	Mon, 27 Jan 2014 11:49:02 +0800
From:	Wang Weidong <>
To:	<>, <>,
CC:	<>, <>
Subject: [PATCH 1/2] sctp: fix a missed .data initialization

As commit 3c68198e75111a90("sctp: Make hmac algorithm selection for
 cookie generation dynamic"), we miss the .data initialization.
If we don't use the net_namespace, the problem that parts of the
sysctl configuration won't be isolation and won't occur.

In sctp_sysctl_net_register(), we register the sysctl for each
net, in the for(), we use the 'table[i].data' as check condition, so
when the 'i' is the index of sctp_hmac_alg, the data is NULL, then
break. So add the .data initialization.

Signed-off-by: Wang Weidong <>
 net/sctp/sysctl.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/sctp/sysctl.c b/net/sctp/sysctl.c
index b0565af..2ddb401 100644
--- a/net/sctp/sysctl.c
+++ b/net/sctp/sysctl.c
@@ -152,6 +152,7 @@ static struct ctl_table sctp_net_table[] = {
 		.procname	= "cookie_hmac_alg",
+		.data		= &init_net.sctp.sctp_hmac_alg,
 		.maxlen		= 8,
 		.mode		= 0644,
 		.proc_handler	= proc_sctp_do_hmac_alg,

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