net: llc: use correct size for sysctl timeout entries

commit 6b8d9117 upstream.

The timeout entries are sizeof(int) rather than sizeof(long), which
means that when they were getting read we'd also leak kernel memory
to userspace along with the timeout values.
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
(cherry picked from commit 88fe14be)
Signed-off-by: Willy Tarreau <w@1wt.eu>

net/llc/sysctl_net_llc.c

@@ -18,7 +18,7 @@ static struct ctl_table llc2_timeout_table[] = {
 		.ctl_name	= NET_LLC2_ACK_TIMEOUT,
 		.procname	= "ack",
 		.data		= &sysctl_llc2_ack_timeout,
-		.maxlen		= sizeof(long),
+		.maxlen		= sizeof(sysctl_llc2_ack_timeout),
 		.mode		= 0644,
 		.proc_handler   = proc_dointvec_jiffies,
 		.strategy       = sysctl_jiffies,
@@ -27,7 +27,7 @@ static struct ctl_table llc2_timeout_table[] = {
 		.ctl_name	= NET_LLC2_BUSY_TIMEOUT,
 		.procname	= "busy",
 		.data		= &sysctl_llc2_busy_timeout,
-		.maxlen		= sizeof(long),
+		.maxlen		= sizeof(sysctl_llc2_busy_timeout),
 		.mode		= 0644,
 		.proc_handler   = proc_dointvec_jiffies,
 		.strategy       = sysctl_jiffies,
@@ -36,7 +36,7 @@ static struct ctl_table llc2_timeout_table[] = {
 		.ctl_name	= NET_LLC2_P_TIMEOUT,
 		.procname	= "p",
 		.data		= &sysctl_llc2_p_timeout,
-		.maxlen		= sizeof(long),
+		.maxlen		= sizeof(sysctl_llc2_p_timeout),
 		.mode		= 0644,
 		.proc_handler   = proc_dointvec_jiffies,
 		.strategy       = sysctl_jiffies,
@@ -45,7 +45,7 @@ static struct ctl_table llc2_timeout_table[] = {
 		.ctl_name	= NET_LLC2_REJ_TIMEOUT,
 		.procname	= "rej",
 		.data		= &sysctl_llc2_rej_timeout,
-		.maxlen		= sizeof(long),
+		.maxlen		= sizeof(sysctl_llc2_rej_timeout),
 		.mode		= 0644,
 		.proc_handler   = proc_dointvec_jiffies,
 		.strategy       = sysctl_jiffies,