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kern: add new overflow checks on KMemoryRegions

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Michael Scire 2020-12-01 17:14:23 -08:00 • committed by SciresM
parent 748893fe77
commit 0a1465f198
8 changed files with 32 additions and 1 deletions
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3
libraries/libmesosphere/source/kern_k_page_table_base.cpp
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@ -1807,6 +1807,9 @@ namespace ams::kern {
const KMemoryRegion *region = KMemoryLayout::GetPhysicalMemoryRegionTree().FindFirstDerived(region_type);
R_UNLESS(region != nullptr, svc::ResultOutOfRange());
/* Check that the region is valid. */
MESOSPHERE_ABORT_UNLESS(region->GetEndAddress() != 0);
/* Map the region. */
R_TRY_CATCH(this->MapStatic(region->GetAddress(), region->GetSize(), perm)) {
R_CONVERT(svc::ResultInvalidAddress, svc::ResultOutOfRange())