PIRP Irp;
PVOID VirtualAddress;
ULONG MdlSize = 2*4096+184; // 2 pages and some random value
+ ULONG TooLargeMdlSize = (0x10000 - sizeof(MDL)) / sizeof(ULONG_PTR) * PAGE_SIZE;
// Try to alloc 2Gb MDL
Mdl = IoAllocateMdl(NULL, 2048UL*0x100000, FALSE, FALSE, NULL);
ok(Mdl == NULL,
- "IoAllocateMdl should fail allocation of 2Gb or more, but got Mdl=0x%X",
+ "IoAllocateMdl should fail allocation of 2Gb or more, but got Mdl=0x%X\n",
(UINT_PTR)Mdl);
if (Mdl)
// Now create a valid MDL
VirtualAddress = ExAllocatePool(NonPagedPool, MdlSize);
Mdl = IoAllocateMdl(VirtualAddress, MdlSize, FALSE, FALSE, NULL);
- ok(Mdl != NULL, "Mdl allocation failed");
+ ok(Mdl != NULL, "Mdl allocation failed\n");
// Check fields of the allocated struct
- ok(Mdl->Next == NULL, "Mdl->Next should be NULL, but is 0x%X",
+ ok(Mdl->Next == NULL, "Mdl->Next should be NULL, but is 0x%X\n",
(UINT_PTR)Mdl->Next);
ok(Mdl->ByteCount == MdlSize,
- "Mdl->ByteCount should be equal to MdlSize, but is 0x%X",
+ "Mdl->ByteCount should be equal to MdlSize, but is 0x%X\n",
(UINT_PTR)Mdl->ByteCount);
// TODO: Check other fields of MDL struct
IoFreeMdl(Mdl);
+
+ // Test maximum size for an MDL
+ Mdl = IoAllocateMdl(NULL, TooLargeMdlSize, FALSE, FALSE, NULL);
+ ok(Mdl == NULL, "Mdl allocation for %lu bytes succeeded\n", TooLargeMdlSize);
+ if (Mdl) IoFreeMdl(Mdl);
+
+ Mdl = IoAllocateMdl(NULL, TooLargeMdlSize - PAGE_SIZE + 1, FALSE, FALSE, NULL);
+ ok(Mdl == NULL, "Mdl allocation for %lu bytes succeeded\n", TooLargeMdlSize - PAGE_SIZE + 1);
+ if (Mdl) IoFreeMdl(Mdl);
+
+ Mdl = IoAllocateMdl(NULL, TooLargeMdlSize - PAGE_SIZE, FALSE, FALSE, NULL);
+ ok(Mdl != NULL, "Mdl allocation for %lu bytes failed\n", TooLargeMdlSize - PAGE_SIZE);
+ if (Mdl) IoFreeMdl(Mdl);
+
+ Mdl = IoAllocateMdl(NULL, TooLargeMdlSize / 2, FALSE, FALSE, NULL);
+ ok(Mdl != NULL, "Mdl allocation for %lu bytes failed\n", TooLargeMdlSize / 2);
+ if (Mdl) IoFreeMdl(Mdl);
+
// Allocate now with pointer to an Irp
Irp = IoAllocateIrp(1, FALSE);
- ok(Irp != NULL, "IRP allocation failed");
+ ok(Irp != NULL, "IRP allocation failed\n");
Mdl = IoAllocateMdl(VirtualAddress, MdlSize, FALSE, FALSE, Irp);
- ok(Mdl != NULL, "Mdl allocation failed");
- ok(Irp->MdlAddress == Mdl, "Irp->MdlAddress should be 0x%X, but is 0x%X",
+ ok(Mdl != NULL, "Mdl allocation failed\n");
+ ok(Irp->MdlAddress == Mdl, "Irp->MdlAddress should be 0x%X, but is 0x%X\n",
(UINT_PTR)Mdl, (UINT_PTR)Irp->MdlAddress);
IoFreeMdl(Mdl);