kern: add new overflow checks on KMemoryRegions

2020-12-01 17:14:23 -08:00
parent 866310937a
commit a56bdab820
8 changed files with 32 additions and 1 deletions
--- a/libraries/libmesosphere/source/svc/kern_svc_address_translation.cpp
+++ b/libraries/libmesosphere/source/svc/kern_svc_address_translation.cpp
@@ -92,6 +92,9 @@ namespace ams::kern::svc {
                    /* Ensure that we found the region. */
                    R_UNLESS(region != nullptr, svc::ResultNotFound());

+                    /* Chcek that the region is valid. */
+                    MESOSPHERE_ABORT_UNLESS(region->GetEndAddress() != 0);
+
                    R_TRY(pt.QueryStaticMapping(std::addressof(found_address), region->GetAddress(), region->GetSize()));
                    found_size = region->GetSize();
                }