Wrong indexing in CPUIDInfo::ArmLinuxInit

[TBrenetNV]

Describe the issue

When initializing CPUIDInfo for ARM64 platform, the core count is retrieved and used to loop over and initialize the core_uarchs_ and is_armv8_narrow_ld_ member variables, however inside the loop the index is used to get the processor entry (not core) and the processor entry's linux_id is used as index into the two member variables. This can result in out of bound write.
Taking as example a machine with 8 cores and 12 processors, both vector would be sized for 8 values while the linux_id value can be 9, 10, 11, etc... (processor id). This can cause random crashes when using onnxruntime.
I believe there is no need to query the processor entry inside the loop and cpuinfo_get_core should be used directly.

onnxruntime/onnxruntime/core/common/cpuid_info.cc

Lines 161 to 180 in e0b66ca

	const uint32_t core_cnt = cpuinfo_get_cores_count();
	core_uarchs_.resize(core_cnt, cpuinfo_uarch_unknown);
	is_armv8_narrow_ld_.resize(core_cnt, false);
	for (uint32_t c = 0; c < core_cnt; c++) {
	const struct cpuinfo_processor* proc = cpuinfo_get_processor(c);
	if (proc == nullptr) {
	continue;
	}
	const struct cpuinfo_core* corep = proc->core;
	if (corep == nullptr) {
	continue;
	}
	auto coreid = proc->linux_id;
	auto uarch = corep->uarch;
	core_uarchs_[coreid] = uarch;
	if (uarch == cpuinfo_uarch_cortex_a53 || uarch == cpuinfo_uarch_cortex_a55r0 ||
	uarch == cpuinfo_uarch_cortex_a55) {
	is_armv8_narrow_ld_[coreid] = true;
	}
	}

To reproduce

Compile ONNXRuntime 1.21.0 ARM64 for an Orin Jetson board (JetPack 6.2) and try running onnxruntime_perf_test (no argument needed). An invalid free crash happens at the end of execution.

Urgency

No response

Platform

Linux

OS Version

JetPack 6.2

ONNX Runtime Installation

Built from Source

ONNX Runtime Version or Commit ID

1.21.0

ONNX Runtime API

C++

Architecture

ARM64

Execution Provider

Default CPU

Execution Provider Library Version

No response

[xadupre]

• @snnn

Since you already found the cause, would you like to contribute and fix it?