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/kern_k_thread.cpp
+++ b/libraries/libmesosphere/source/kern_k_thread.cpp
@@ -207,6 +207,7 @@ namespace ams::kern {
    Result KThread::InitializeThread(KThread *thread, KThreadFunction func, uintptr_t arg, KProcessAddress user_stack_top, s32 prio, s32 core, KProcess *owner, ThreadType type) {
        /* Get stack region for the thread. */
        const auto &stack_region = KMemoryLayout::GetKernelStackRegion();
+        MESOSPHERE_ABORT_UNLESS(stack_region.GetEndAddress() != 0);

        /* Allocate a page to use as the thread. */
        KPageBuffer *page = KPageBuffer::Allocate();