linux/net/llc/sysctl_net_llc.c
Sasha Levin 6b8d9117cc net: llc: use correct size for sysctl timeout entries
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>
2015-01-25 00:23:21 -08:00

79 lines
1.8 KiB
C

/*
* sysctl_net_llc.c: sysctl interface to LLC net subsystem.
*
* Arnaldo Carvalho de Melo <acme@conectiva.com.br>
*/
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/sysctl.h>
#include <net/net_namespace.h>
#include <net/llc.h>
#ifndef CONFIG_SYSCTL
#error This file should not be compiled without CONFIG_SYSCTL defined
#endif
static struct ctl_table llc2_timeout_table[] = {
{
.procname = "ack",
.data = &sysctl_llc2_ack_timeout,
.maxlen = sizeof(sysctl_llc2_ack_timeout),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
{
.procname = "busy",
.data = &sysctl_llc2_busy_timeout,
.maxlen = sizeof(sysctl_llc2_busy_timeout),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
{
.procname = "p",
.data = &sysctl_llc2_p_timeout,
.maxlen = sizeof(sysctl_llc2_p_timeout),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
{
.procname = "rej",
.data = &sysctl_llc2_rej_timeout,
.maxlen = sizeof(sysctl_llc2_rej_timeout),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
{ },
};
static struct ctl_table llc_station_table[] = {
{ },
};
static struct ctl_table_header *llc2_timeout_header;
static struct ctl_table_header *llc_station_header;
int __init llc_sysctl_init(void)
{
llc2_timeout_header = register_net_sysctl(&init_net, "net/llc/llc2/timeout", llc2_timeout_table);
llc_station_header = register_net_sysctl(&init_net, "net/llc/station", llc_station_table);
if (!llc2_timeout_header || !llc_station_header) {
llc_sysctl_exit();
return -ENOMEM;
}
return 0;
}
void llc_sysctl_exit(void)
{
if (llc2_timeout_header) {
unregister_net_sysctl_table(llc2_timeout_header);
llc2_timeout_header = NULL;
}
if (llc_station_header) {
unregister_net_sysctl_table(llc_station_header);
llc_station_header = NULL;
}
}