github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-09-25 09:41:03 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

platform/x86: ISST: Validate parameter for frequency and priority

Browse Source 
Validate range for frequency and proportional priority while setting
CLOS parameters.

Fixes: 12a7d2cb81 ("platform/x86: ISST: Add SST-CP support via TPMI")
Cc: stable@vger.kernel.org
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://patch.msgid.link/20260811221514.3905817-5-srinivas.pandruvada@linux.intel.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
This commit is contained in:
Srinivas Pandruvada 2026-08-11 15:15:12 -07:00 committed by Ilpo Järvinen
parent 1700b4f804
commit 574b59bb4b
No known key found for this signature in database
GPG Key ID: 59AC4F6153E5CE31
1 changed files with 12 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/platform/x86/intel/speed_select_if/isst_tpmi_core.c
View File

@ -658,6 +658,9 @@ static long isst_if_core_power_state(void __user *argp)
#define SST_MAX_CLOS 3
#define SST_MAX_FREQ 0xff
#define SST_CLOS_MAX_PRIORITY 0x0f
static long isst_if_clos_param(void __user *argp)
{
struct tpmi_per_power_domain_info *power_domain_info;
@ -677,6 +680,15 @@ static long isst_if_clos_param(void __user *argp)
if (power_domain_info->write_blocked || !capable(CAP_SYS_ADMIN))
return -EPERM;
if (!in_range(clos_param.min_freq_mhz / SST_MUL_FACTOR_FREQ, 0, SST_MAX_FREQ + 1))
return -EINVAL;
if (!in_range(clos_param.max_freq_mhz / SST_MUL_FACTOR_FREQ, 0, SST_MAX_FREQ + 1))
return -EINVAL;
if (!in_range(clos_param.prop_prio, 0, SST_CLOS_MAX_PRIORITY + 1))
return -EINVAL;
_write_cp_info("clos.min_freq", clos_param.min_freq_mhz,
(SST_CLOS_CONFIG_0_OFFSET + clos_param.clos * SST_REG_SIZE),
SST_CLOS_CONFIG_MIN_START, SST_CLOS_CONFIG_MIN_WIDTH,