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8222387: Out-of-bounds access to CPU _family_id_xxx array

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Reviewed-by: dholmes, kvn
This commit is contained in:
Jinke Fan 2019-04-14 21:40:07 +00:00 committed by David Holmes
parent 6f032ffbb5
commit 7abe899912
2 changed files with 27 additions and 11 deletions
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28
src/hotspot/cpu/x86/vm_version_ext_x86.cpp
View File

@ -43,10 +43,10 @@ typedef enum {
CPU_FAMILY_PENTIUM_4 = 0xF
} FamilyFlag;
typedef enum {
RDTSCP_FLAG = 0x08000000, // bit 27
INTEL64_FLAG = 0x20000000 // bit 29
} _featureExtendedEdxFlag;
typedef enum {
RDTSCP_FLAG = 0x08000000, // bit 27
INTEL64_FLAG = 0x20000000 // bit 29
} _featureExtendedEdxFlag;
#define CPUID_STANDARD_FN 0x0
#define CPUID_STANDARD_FN_1 0x1
@ -403,18 +403,21 @@ int VM_Version_Ext::number_of_sockets(void) {
const char* VM_Version_Ext::cpu_family_description(void) {
int cpu_family_id = extended_cpu_family();
if (is_amd()) {
return _family_id_amd[cpu_family_id];
if (cpu_family_id < ExtendedFamilyIdLength_AMD) {
return _family_id_amd[cpu_family_id];
}
}
if (is_intel()) {
if (cpu_family_id == CPU_FAMILY_PENTIUMPRO) {
return cpu_model_description();
}
return _family_id_intel[cpu_family_id];
if (cpu_family_id < ExtendedFamilyIdLength_INTEL) {
return _family_id_intel[cpu_family_id];
}
}
if (is_hygon()) {
return "Dhyana";
}
return "Unknown x86";
}
@ -705,7 +708,7 @@ jlong VM_Version_Ext::maximum_qualified_cpu_frequency(void) {
return _max_qualified_cpu_frequency;
}
const char* const VM_Version_Ext::_family_id_intel[] = {
const char* const VM_Version_Ext::_family_id_intel[ExtendedFamilyIdLength_INTEL] = {
"8086/8088",
"",
"286",
@ -724,7 +727,7 @@ const char* const VM_Version_Ext::_family_id_intel[] = {
"Pentium 4"
};
const char* const VM_Version_Ext::_family_id_amd[] = {
const char* const VM_Version_Ext::_family_id_amd[ExtendedFamilyIdLength_AMD] = {
"",
"",
"",
@ -742,6 +745,13 @@ const char* const VM_Version_Ext::_family_id_amd[] = {
"",
"Opteron/Athlon64",
"Opteron QC/Phenom" // Barcelona et.al.
"",
"",
"",
"",
"",
"",
"Zen"
};
// Partially from Intel 64 and IA-32 Architecture Software Developer's Manual,
// September 2013, Vol 3C Table 35-1

10
src/hotspot/cpu/x86/vm_version_ext_x86.hpp
View File

@ -29,14 +29,20 @@
#include "vm_version_x86.hpp"
class VM_Version_Ext : public VM_Version {
enum {
ExtendedFamilyIdLength_INTEL = 16,
ExtendedFamilyIdLength_AMD = 24
};
private:
static const size_t VENDOR_LENGTH;
static const size_t CPU_EBS_MAX_LENGTH;
static const size_t CPU_TYPE_DESC_BUF_SIZE;
static const size_t CPU_DETAILED_DESC_BUF_SIZE;
static const char* const _family_id_intel[];
static const char* const _family_id_amd[];
static const char* const _family_id_intel[ExtendedFamilyIdLength_INTEL];
static const char* const _family_id_amd[ExtendedFamilyIdLength_AMD];
static const char* const _brand_id[];
static const char* const _model_id_pentium_pro[];