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Kernel: Don't include kmalloc perf events in JSON for non-superuser

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These events contain sensitive kernel information and should not be
available to regular users.
This commit is contained in:
Andreas Kling 2021-12-19 16:40:11 +01:00
parent 8ef9b003ad
commit 369c7a7e9f
1 changed files with 8 additions and 1 deletions
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9
Kernel/PerformanceEventBuffer.cpp
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@ -196,10 +196,17 @@ ErrorOr<void> PerformanceEventBuffer::to_json_impl(Serializer& object) const
} }
} }
bool show_kernel_addresses = Process::current().is_superuser();
auto array = object.add_array("events"); auto array = object.add_array("events");
bool seen_first_sample = false; bool seen_first_sample = false;
for (size_t i = 0; i < m_count; ++i) { for (size_t i = 0; i < m_count; ++i) {
auto& event = at(i); auto const& event = at(i);
if (!show_kernel_addresses) {
if (event.type == PERF_EVENT_KMALLOC || event.type == PERF_EVENT_KFREE)
continue;
}
auto event_object = array.add_object(); auto event_object = array.add_object();
switch (event.type) { switch (event.type) {
case PERF_EVENT_SAMPLE: case PERF_EVENT_SAMPLE: