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Kernel: Mask kernel addresses in perf event streams for non-superuser

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We now turn kernel addresses into 0xdeadc0de, same as /proc/PID/stacks/
This commit is contained in:
Andreas Kling 2021-12-19 16:41:07 +01:00
parent 369c7a7e9f
commit 1cdc7aa038
1 changed files with 4 additions and 1 deletions
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5
Kernel/PerformanceEventBuffer.cpp
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@ -286,7 +286,10 @@ ErrorOr<void> PerformanceEventBuffer::to_json_impl(Serializer& object) const
seen_first_sample = true;
auto stack_array = event_object.add_array("stack");
for (size_t j = 0; j < event.stack_size; ++j) {
stack_array.add(event.stack[j]);
auto address = event.stack[j];
if (!show_kernel_addresses && !Memory::is_user_address(VirtualAddress { address }))
address = 0xdeadc0de;
stack_array.add(address);
}
stack_array.finish();
event_object.finish();