Revision 00aff3590fc0a73bddd3b743863c14e76fd35c0c authored by Hangyu Hua on 29 June 2022, 06:34:18 UTC, committed by David S. Miller on 29 June 2022, 12:49:06 UTC
Free sk in case tipc_sk_insert() fails. Signed-off-by: Hangyu Hua <hbh25y@gmail.com> Reviewed-by: Tung Nguyen <tung.q.nguyen@dektech.com.au> Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent 5a478a6
min_addr.c
// SPDX-License-Identifier: GPL-2.0
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/security.h>
#include <linux/sysctl.h>
/* amount of vm to protect from userspace access by both DAC and the LSM*/
unsigned long mmap_min_addr;
/* amount of vm to protect from userspace using CAP_SYS_RAWIO (DAC) */
unsigned long dac_mmap_min_addr = CONFIG_DEFAULT_MMAP_MIN_ADDR;
/* amount of vm to protect from userspace using the LSM = CONFIG_LSM_MMAP_MIN_ADDR */
/*
* Update mmap_min_addr = max(dac_mmap_min_addr, CONFIG_LSM_MMAP_MIN_ADDR)
*/
static void update_mmap_min_addr(void)
{
#ifdef CONFIG_LSM_MMAP_MIN_ADDR
if (dac_mmap_min_addr > CONFIG_LSM_MMAP_MIN_ADDR)
mmap_min_addr = dac_mmap_min_addr;
else
mmap_min_addr = CONFIG_LSM_MMAP_MIN_ADDR;
#else
mmap_min_addr = dac_mmap_min_addr;
#endif
}
/*
* sysctl handler which just sets dac_mmap_min_addr = the new value and then
* calls update_mmap_min_addr() so non MAP_FIXED hints get rounded properly
*/
int mmap_min_addr_handler(struct ctl_table *table, int write,
void *buffer, size_t *lenp, loff_t *ppos)
{
int ret;
if (write && !capable(CAP_SYS_RAWIO))
return -EPERM;
ret = proc_doulongvec_minmax(table, write, buffer, lenp, ppos);
update_mmap_min_addr();
return ret;
}
static int __init init_mmap_min_addr(void)
{
update_mmap_min_addr();
return 0;
}
pure_initcall(init_mmap_min_addr);
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