提交 74f0414b 编写于 作者: J James Morris
config SECURITY_YAMA
bool "Yama support"
depends on SECURITY
select SECURITYFS
select SECURITY_PATH
default n
help
This selects Yama, which extends DAC support with additional
......
......@@ -379,20 +379,17 @@ static struct security_operations yama_ops = {
static int yama_dointvec_minmax(struct ctl_table *table, int write,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
int rc;
struct ctl_table table_copy;
if (write && !capable(CAP_SYS_PTRACE))
return -EPERM;
rc = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
if (rc)
return rc;
/* Lock the max value if it ever gets set. */
if (write && *(int *)table->data == *(int *)table->extra2)
table->extra1 = table->extra2;
table_copy = *table;
if (*(int *)table_copy.data == *(int *)table_copy.extra2)
table_copy.extra1 = table_copy.extra2;
return rc;
return proc_dointvec_minmax(&table_copy, write, buffer, lenp, ppos);
}
static int zero;
......
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