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kernel/svc: Properly sanitize mutex address in WaitProcessWideKeyAtomic

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We need to be checking whether or not the given address is within the
kernel address space or if the given address isn't word-aligned and bail
in these scenarios instead of trashing any kernel state.
This commit is contained in:
Lioncash 2019-04-03 20:23:14 -04:00
parent 7931a68d4e
commit c39c8e6982
1 changed files with 14 additions and 0 deletions
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14
src/core/hle/kernel/svc.cpp
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@ -1339,6 +1339,20 @@ static ResultCode WaitProcessWideKeyAtomic(VAddr mutex_addr, VAddr condition_var
"called mutex_addr={:X}, condition_variable_addr={:X}, thread_handle=0x{:08X}, timeout={}",
mutex_addr, condition_variable_addr, thread_handle, nano_seconds);
if (Memory::IsKernelVirtualAddress(mutex_addr)) {
LOG_ERROR(
Kernel_SVC,
"Given mutex address must not be within the kernel address space. address=0x{:016X}",
mutex_addr);
return ERR_INVALID_ADDRESS_STATE;
}
if (!Common::IsWordAligned(mutex_addr)) {
LOG_ERROR(Kernel_SVC, "Given mutex address must be word-aligned. address=0x{:016X}",
mutex_addr);
return ERR_INVALID_ADDRESS;
}
auto* const current_process = Core::System::GetInstance().Kernel().CurrentProcess();
const auto& handle_table = current_process->GetHandleTable();
SharedPtr<Thread> thread = handle_table.Get<Thread>(thread_handle);