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__mcctrl_control: Check user privilege

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Change-Id: Ia87ab241f980ea25df805bd31d66f07bf3681311
This commit is contained in:
Jie Yin
2020-03-17 09:22:09 +00:00
committed by Masamichi Takagi
parent c9f05f238d
commit 6cf7cebb2d
1 changed files with 37 additions and 0 deletions
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37
executer/kernel/mcctrl/control.c
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@ -3240,9 +3240,46 @@ out:
return rc;
}
static int __mcctrl_control_perm(unsigned int request)
{
int ret = 0;
kuid_t euid;
/* black list */
switch (request) {
case IHK_OS_AUX_PERF_NUM:
case IHK_OS_AUX_PERF_SET:
case IHK_OS_AUX_PERF_GET:
case IHK_OS_AUX_PERF_ENABLE:
case IHK_OS_AUX_PERF_DISABLE:
case IHK_OS_AUX_PERF_DESTROY:
euid = current_euid();
pr_debug("%s: request=0x%x, euid=%u\n",
__func__, request, euid.val);
if (euid.val) {
ret = -EPERM;
}
break;
default:
break;
}
pr_debug("%s: request=0x%x, ret=%d\n", __func__, request, ret);
return ret;
}
long __mcctrl_control(ihk_os_t os, unsigned int req, unsigned long arg,
struct file *file)
{
int ret;
ret = __mcctrl_control_perm(req);
if (ret) {
pr_err("%s: error: permission denied, req: %x\n",
__func__, req);
return ret;
}
switch (req) {
case MCEXEC_UP_PREPARE_IMAGE:
return mcexec_prepare_image(os,