sometimes the gdrv returns an invalid virtual address that is 1 page

ahead of the actual mapping... added a try/catch around memcmp

physmeme-lib/kernel_ctx/kernel_ctx.cpp

@@ -43,7 +43,11 @@ namespace physmeme
 			{
 				// scan every page of the physical memory range
 				for (auto page = page_va; page < page_va + end; page += 0x1000)
+				{
 					if (!is_page_found.load()) // keep scanning until its found
+					{
+						__try
+						{
 							if (!memcmp(reinterpret_cast<void*>(page), ntoskrnl_buffer + nt_rva, 32))
 							{
 								//
@@ -59,6 +63,10 @@ namespace physmeme
 								is_page_found.store(true);
 								return;
 							}
+						}
+						__except (EXCEPTION_EXECUTE_HANDLER) {}
+					}
+				}
 				physmeme::unmap_phys(page_va, end);
 			}
 		}
@@ -76,6 +84,8 @@ namespace physmeme
 					for (auto page = page_va; page < page_va + 0x1000 * 512; page += 0x1000)
 					{
 						if (!is_page_found.load())
+						{
+							__try
 							{
 								if (!memcmp(reinterpret_cast<void*>(page), ntoskrnl_buffer + nt_rva, 32))
 								{
@@ -93,6 +103,8 @@ namespace physmeme
 									return;
 								}
 							}
+							__except (EXCEPTION_EXECUTE_HANDLER) {}
+						}
 					}
 					physmeme::unmap_phys(page_va, 0x1000 * 512);
 				}
@@ -105,6 +117,8 @@ namespace physmeme
 				for (auto page = page_va; page < page_va + remainder; page += 0x1000)
 				{
 					if (!is_page_found.load())
+					{
+						__try
 						{
 							if (!memcmp(reinterpret_cast<void*>(page), ntoskrnl_buffer + nt_rva, 32))
 							{
@@ -122,6 +136,8 @@ namespace physmeme
 								return;
 							}
 						}
+						__except (EXCEPTION_EXECUTE_HANDLER) {}
+					}
 				}
 				physmeme::unmap_phys(page_va, remainder);
 			}

physmeme/kernel_ctx/kernel_ctx.cpp

@@ -43,7 +43,11 @@ namespace physmeme
 			{
 				// scan every page of the physical memory range
 				for (auto page = page_va; page < page_va + end; page += 0x1000)
+				{
 					if (!is_page_found.load()) // keep scanning until its found
+					{
+						__try
+						{
 							if (!memcmp(reinterpret_cast<void*>(page), ntoskrnl_buffer + nt_rva, 32))
 							{
 								//
@@ -59,6 +63,10 @@ namespace physmeme
 								is_page_found.store(true);
 								return;
 							}
+						}
+						__except (EXCEPTION_EXECUTE_HANDLER) {}
+					}
+				}
 				physmeme::unmap_phys(page_va, end);
 			}
 		}
@@ -76,6 +84,8 @@ namespace physmeme
 					for (auto page = page_va; page < page_va + 0x1000 * 512; page += 0x1000)
 					{
 						if (!is_page_found.load())
+						{
+							__try
 							{
 								if (!memcmp(reinterpret_cast<void*>(page), ntoskrnl_buffer + nt_rva, 32))
 								{
@@ -93,6 +103,8 @@ namespace physmeme
 									return;
 								}
 							}
+							__except (EXCEPTION_EXECUTE_HANDLER) {}
+						}
 					}
 					physmeme::unmap_phys(page_va, 0x1000 * 512);
 				}
@@ -105,6 +117,8 @@ namespace physmeme
 				for (auto page = page_va; page < page_va + remainder; page += 0x1000)
 				{
 					if (!is_page_found.load())
+					{
+						__try
 						{
 							if (!memcmp(reinterpret_cast<void*>(page), ntoskrnl_buffer + nt_rva, 32))
 							{
@@ -122,6 +136,8 @@ namespace physmeme
 								return;
 							}
 						}
+						__except (EXCEPTION_EXECUTE_HANDLER) {}
+					}
 				}
 				physmeme::unmap_phys(page_va, remainder);
 			}