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RDMSR: Replace unsafe sprintf() by safe snprintf()

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This commit is contained in:
Xorg 2019-02-17 15:41:44 +01:00
parent 32d1ac4aff
commit c683dfb084
1 changed files with 6 additions and 4 deletions
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10
libcpuid/rdmsr.c
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@ -33,6 +33,8 @@
#include "libcpuid_internal.h"
#include "rdtsc.h"
#define MSR_PATH_LEN 32
#if defined (__linux__) || defined (__gnu_linux__)
/* Assuming linux with /dev/cpu/x/msr: */
#include <unistd.h>
@ -65,7 +67,7 @@ struct msr_driver_t* cpu_msr_driver_open(void)
struct msr_driver_t* cpu_msr_driver_open_core(unsigned core_num)
{
char msr[32];
char msr[MSR_PATH_LEN];
struct msr_driver_t* handle;
if (core_num >= cpuid_get_total_cpus()) {
set_error(ERR_INVCNB);
@ -75,7 +77,7 @@ struct msr_driver_t* cpu_msr_driver_open_core(unsigned core_num)
set_error(ERR_NO_RDMSR);
return NULL;
}
sprintf(msr, "/dev/cpu/%u/msr", core_num);
snprintf(msr, MSR_PATH_LEN, "/dev/cpu/%u/msr", core_num);
if(!load_driver(msr)) {
set_error(ERR_NO_DRIVER);
return NULL;
@ -149,7 +151,7 @@ struct msr_driver_t* cpu_msr_driver_open(void)
struct msr_driver_t* cpu_msr_driver_open_core(unsigned core_num)
{
char msr[32];
char msr[MSR_PATH_LEN];
struct msr_driver_t* handle;
if (core_num >= cpuid_get_total_cpus()) {
set_error(ERR_INVCNB);
@ -159,7 +161,7 @@ struct msr_driver_t* cpu_msr_driver_open_core(unsigned core_num)
set_error(ERR_NO_RDMSR);
return NULL;
}
sprintf(msr, "/dev/cpuctl%u", core_num);
snprintf(msr, MSR_PATH_LEN, "/dev/cpuctl%u", core_num);
if(!load_driver(msr)) {
set_error(ERR_NO_DRIVER);
return NULL;