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svc: Add missing sanitizing checks for MapSharedMemory/UnmapSharedMemory

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Now that the changes clarifying the address spaces has been merged, we
can wrap the checks that the kernel performs when mapping shared memory
(and other forms of memory) into its own helper function and then use
those within MapSharedMemory and UnmapSharedMemory to complete the
sanitizing checks that are supposed to be done.
This commit is contained in:
Lioncash 2018-10-17 22:39:21 -04:00
parent cc962d05af
commit 489f59e45f
3 changed files with 50 additions and 3 deletions
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30
src/core/hle/kernel/svc.cpp
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@ -578,6 +578,10 @@ static ResultCode MapSharedMemory(Handle shared_memory_handle, VAddr addr, u64 s
return ERR_INVALID_SIZE;
}
if (!IsValidAddressRange(addr, size)) {
return ERR_INVALID_ADDRESS_STATE;
}
const auto permissions_type = static_cast<MemoryPermission>(permissions);
if (permissions_type != MemoryPermission::Read &&
permissions_type != MemoryPermission::ReadWrite) {
@ -591,8 +595,14 @@ static ResultCode MapSharedMemory(Handle shared_memory_handle, VAddr addr, u64 s
return ERR_INVALID_HANDLE;
}
return shared_memory->Map(Core::CurrentProcess(), addr, permissions_type,
MemoryPermission::DontCare);
auto* const current_process = Core::CurrentProcess();
const auto& vm_manager = current_process->VMManager();
if (!vm_manager.IsWithinASLRRegion(addr, size)) {
return ERR_INVALID_MEMORY_RANGE;
}
return shared_memory->Map(current_process, addr, permissions_type, MemoryPermission::DontCare);
}
static ResultCode UnmapSharedMemory(Handle shared_memory_handle, VAddr addr, u64 size) {
@ -607,10 +617,24 @@ static ResultCode UnmapSharedMemory(Handle shared_memory_handle, VAddr addr, u64
return ERR_INVALID_SIZE;
}
if (!IsValidAddressRange(addr, size)) {
return ERR_INVALID_ADDRESS_STATE;
}
auto& kernel = Core::System::GetInstance().Kernel();
auto shared_memory = kernel.HandleTable().Get<SharedMemory>(shared_memory_handle);
if (!shared_memory) {
return ERR_INVALID_HANDLE;
}
return shared_memory->Unmap(Core::CurrentProcess(), addr);
auto* const current_process = Core::CurrentProcess();
const auto& vm_manager = current_process->VMManager();
if (!vm_manager.IsWithinASLRRegion(addr, size)) {
return ERR_INVALID_MEMORY_RANGE;
}
return shared_memory->Unmap(current_process, addr);
}
/// Query process memory