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Code Issues Releases Activity

ldr_ro: Add error check for memory allocation failure

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This commit is contained in:
Zach Hilman 2018-11-17 21:40:17 -05:00
parent c0a9abc3e1
commit 51af996854
4 changed files with 27 additions and 13 deletions
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4
src/core/hle/kernel/process.cpp
View file

@ -252,8 +252,8 @@ ResultCode Process::HeapFree(VAddr target, u32 size) {
return vm_manager.HeapFree(target, size);
}
ResultCode Process::MirrorMemory(VAddr dst_addr, VAddr src_addr, u64 size) {
return vm_manager.MirrorMemory(dst_addr, src_addr, size);
ResultCode Process::MirrorMemory(VAddr dst_addr, VAddr src_addr, u64 size, MemoryState state) {
return vm_manager.MirrorMemory(dst_addr, src_addr, size, state);
}
ResultCode Process::UnmapMemory(VAddr dst_addr, VAddr /*src_addr*/, u64 size) {

6
src/core/hle/kernel/vm_manager.cpp
View file

@ -298,7 +298,7 @@ ResultCode VMManager::HeapFree(VAddr target, u64 size) {
return RESULT_SUCCESS;
}
ResultCode VMManager::MirrorMemory(VAddr dst_addr, VAddr src_addr, u64 size) {
ResultCode VMManager::MirrorMemory(VAddr dst_addr, VAddr src_addr, u64 size, MemoryState state) {
const auto vma = FindVMA(src_addr);
ASSERT_MSG(vma != vma_map.end(), "Invalid memory address");
@ -312,8 +312,8 @@ ResultCode VMManager::MirrorMemory(VAddr dst_addr, VAddr src_addr, u64 size) {
const std::shared_ptr<std::vector<u8>>& backing_block = vma->second.backing_block;
const std::size_t backing_block_offset = vma->second.offset + vma_offset;
CASCADE_RESULT(auto new_vma, MapMemoryBlock(dst_addr, backing_block, backing_block_offset, size,
MemoryState::Mapped));
CASCADE_RESULT(auto new_vma,
MapMemoryBlock(dst_addr, backing_block, backing_block_offset, size, state));
// Protect mirror with permissions from old region
Reprotect(new_vma, vma->second.permissions);
// Remove permissions from old region

3
src/core/hle/kernel/vm_manager.h
View file

@ -189,7 +189,8 @@ public:
ResultVal<VAddr> HeapAllocate(VAddr target, u64 size, VMAPermission perms);
ResultCode HeapFree(VAddr target, u64 size);
ResultCode MirrorMemory(VAddr dst_addr, VAddr src_addr, u64 size);
ResultCode MirrorMemory(VAddr dst_addr, VAddr src_addr, u64 size,
MemoryState state = MemoryState::Mapped);
/**
* Scans all VMAs and updates the page table range of any that use the given vector as backing

27
src/core/hle/service/ldr/ldr.cpp
View file

@ -18,6 +18,7 @@ namespace Service::LDR {
namespace ErrCodes {
enum {
InvalidMemoryState = 51,
InvalidNRO = 52,
InvalidNRR = 53,
MissingNRRHash = 54,
@ -32,6 +33,7 @@ enum {
};
}
constexpr ResultCode ERROR_INVALID_MEMORY_STATE(ErrorModule::Loader, ErrCodes::InvalidMemoryState);
constexpr ResultCode ERROR_INVALID_NRO(ErrorModule::Loader, ErrCodes::InvalidNRO);
constexpr ResultCode ERROR_INVALID_NRR(ErrorModule::Loader, ErrCodes::InvalidNRR);
constexpr ResultCode ERROR_MISSING_NRR_HASH(ErrorModule::Loader, ErrCodes::MissingNRRHash);
@ -120,7 +122,7 @@ public:
return;
}
if (nro.size() >= MAXIMUM_LOADED_RO) {
if (nrr.size() >= MAXIMUM_LOADED_RO) {
LOG_ERROR(Service_LDR, "Loading new NRR would exceed the maximum number of loaded NRRs "
"(0x40)! Failing...");
IPC::ResponseBuilder rb{ctx, 2};
@ -178,10 +180,13 @@ public:
}
std::vector<SHA256Hash> hashes;
// Copy all hashes in the NRR (specified by hash count/hash offset) into vector.
for (std::size_t i = header.hash_offset;
i < (header.hash_offset + (header.hash_count << 5)); i += 8) {
hashes.emplace_back();
std::memcpy(hashes.back().data(), nrr_data.data() + i, sizeof(SHA256Hash));
i < (header.hash_offset + (header.hash_count * sizeof(SHA256Hash))); i += 8) {
SHA256Hash hash;
std::memcpy(hash.data(), nrr_data.data() + i, sizeof(SHA256Hash));
hashes.emplace_back(hash);
}
nrr.insert_or_assign(nrr_addr, std::move(hashes));
@ -258,8 +263,8 @@ public:
// NRO Size or BSS Size is zero or causes overflow
const auto nro_size_valid =
nro_size != 0 && nro_addr + nro_size > nro_addr && Common::Is4KBAligned(nro_size);
const auto bss_size_valid = std::numeric_limits<u64>::max() - nro_size >= bss_size &&
(bss_size == 0 || bss_addr + bss_size > bss_addr);
const auto bss_size_valid =
nro_size + bss_size >= nro_size && (bss_size == 0 || bss_addr + bss_size > bss_addr);
if (!nro_size_valid || !bss_size_valid) {
LOG_ERROR(Service_LDR,
@ -313,7 +318,15 @@ public:
auto& vm_manager = process->VMManager();
auto map_address = vm_manager.FindFreeRegion(nro_size + bss_size);
ASSERT(map_address.Succeeded());
if (!map_address.Succeeded() ||
*map_address + nro_size + bss_size > vm_manager.GetAddressSpaceEndAddress()) {
LOG_ERROR(Service_LDR,
"General error while allocation memory or no available memory to allocate!");
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_INVALID_MEMORY_STATE);
return;
}
ASSERT(process->MirrorMemory(*map_address, nro_addr, nro_size,
Kernel::MemoryState::ModuleCodeStatic) == RESULT_SUCCESS);