feat: multi-user system, bug fixes, security & performance fixes, and more

2026-03-14 13:28:46 +01:00
parent 576ad34f95
commit 261b536041
389 changed files with 231853 additions and 591 deletions
@@ -36,11 +36,19 @@ namespace Montauk {
        auto* proc = Sched::GetCurrentProcessPtr();
        if (proc == nullptr) return 0;

+        // Guard against overflow before rounding
+        static constexpr uint64_t USER_SPACE_END = 0x0000800000000000ULL;
+        if (size > 0xFFFFFFFFFFFF0000ULL) return 0;
+
        // Round up to page boundary
        size = (size + 0xFFF) & ~0xFFFULL;
        if (size == 0) size = 0x1000;

        uint64_t userVa = proc->heapNext;
+
+        // Ensure allocation stays within user address space
+        if (userVa + size < userVa || userVa + size > USER_SPACE_END) return 0;
+
        uint64_t numPages = size / 0x1000;

        // Allocate physical pages and map them into the process