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Kernel: Don't allow allocate_tls() if the process has multiple threads
We can't safely update the other threads' FS selector. This shouldn't be a problem in practice because allocate_tls() is only used by the loader.
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1 changed files with 7 additions and 1 deletions
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@ -578,12 +578,18 @@ KResultOr<FlatPtr> Process::sys$allocate_tls(Userspace<const char*> initial_data
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return EFAULT;
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Thread* main_thread = nullptr;
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for_each_thread([&main_thread](auto& thread) {
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bool multiple_threads = false;
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for_each_thread([&main_thread, &multiple_threads](auto& thread) {
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if (main_thread)
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multiple_threads = true;
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main_thread = &thread;
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return IterationDecision::Break;
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});
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VERIFY(main_thread);
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if (multiple_threads)
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return EINVAL;
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auto range = space().allocate_range({}, size);
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if (!range.has_value())
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return ENOMEM;
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