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kernel/svc: Handle error cases for svcArbitrateLock() and svcArbitrateUnlock()

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The kernel does the equivalent of the following check before proceeding:

if (address + 0x8000000000 < 0x7FFFE00000) {
    return ERR_INVALID_MEMORY_STATE;
}

which is essentially what our IsKernelVirtualAddress() function does. So
we should also be checking for this.

The kernel also checks if the given input addresses are 4-byte aligned,
however our Mutex::TryAcquire() and Mutex::Release() functions already
handle this, so we don't need to add code for this case.
This commit is contained in:
Lioncash 2018-09-17 18:49:51 -04:00
parent a94b623dfb
commit b6867602ca
1 changed files with 8 additions and 0 deletions
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8
src/core/hle/kernel/svc.cpp
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@ -280,6 +280,10 @@ static ResultCode ArbitrateLock(Handle holding_thread_handle, VAddr mutex_addr,
"requesting_current_thread_handle=0x{:08X}",
holding_thread_handle, mutex_addr, requesting_thread_handle);
if (Memory::IsKernelVirtualAddress(mutex_addr)) {
return ERR_INVALID_ADDRESS_STATE;
}
auto& handle_table = Core::System::GetInstance().Kernel().HandleTable();
return Mutex::TryAcquire(handle_table, mutex_addr, holding_thread_handle,
requesting_thread_handle);
@ -289,6 +293,10 @@ static ResultCode ArbitrateLock(Handle holding_thread_handle, VAddr mutex_addr,
static ResultCode ArbitrateUnlock(VAddr mutex_addr) {
LOG_TRACE(Kernel_SVC, "called mutex_addr=0x{:X}", mutex_addr);
if (Memory::IsKernelVirtualAddress(mutex_addr)) {
return ERR_INVALID_ADDRESS_STATE;
}
return Mutex::Release(mutex_addr);
}