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hle: service: am: IStorageAccessor: Fix out of bounds error handling.

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This commit is contained in:
bunnei 2021-02-13 02:30:33 -08:00
parent 0bbf5e61f1
commit d25011c92f
1 changed files with 7 additions and 6 deletions
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13
src/core/hle/service/am/am.cpp
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@ -1047,20 +1047,21 @@ void IStorageAccessor::Write(Kernel::HLERequestContext& ctx) {
const u64 offset{rp.Pop<u64>()}; const u64 offset{rp.Pop<u64>()};
const std::vector<u8> data{ctx.ReadBuffer()}; const std::vector<u8> data{ctx.ReadBuffer()};
const std::size_t size{std::min(data.size(), backing.GetSize() - offset)};
LOG_DEBUG(Service_AM, "called, offset={}, size={}", offset, data.size()); LOG_DEBUG(Service_AM, "called, offset={}, size={}", offset, size);
if (data.size() > backing.GetSize() - offset) { if (offset > backing.GetSize()) {
LOG_ERROR(Service_AM, LOG_ERROR(Service_AM,
"offset is out of bounds, backing_buffer_sz={}, data_size={}, offset={}", "offset is out of bounds, backing_buffer_sz={}, data_size={}, offset={}",
backing.GetSize(), data.size(), offset); backing.GetSize(), size, offset);
IPC::ResponseBuilder rb{ctx, 2}; IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERR_SIZE_OUT_OF_BOUNDS); rb.Push(ERR_SIZE_OUT_OF_BOUNDS);
return; return;
} }
std::memcpy(backing.GetData().data() + offset, data.data(), data.size()); std::memcpy(backing.GetData().data() + offset, data.data(), size);
IPC::ResponseBuilder rb{ctx, 2}; IPC::ResponseBuilder rb{ctx, 2};
rb.Push(RESULT_SUCCESS); rb.Push(RESULT_SUCCESS);
@ -1070,11 +1071,11 @@ void IStorageAccessor::Read(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp{ctx}; IPC::RequestParser rp{ctx};
const u64 offset{rp.Pop<u64>()}; const u64 offset{rp.Pop<u64>()};
const std::size_t size{ctx.GetWriteBufferSize()}; const std::size_t size{std::min(ctx.GetWriteBufferSize(), backing.GetSize() - offset)};
LOG_DEBUG(Service_AM, "called, offset={}, size={}", offset, size); LOG_DEBUG(Service_AM, "called, offset={}, size={}", offset, size);
if (size > backing.GetSize() - offset) { if (offset > backing.GetSize()) {
LOG_ERROR(Service_AM, "offset is out of bounds, backing_buffer_sz={}, size={}, offset={}", LOG_ERROR(Service_AM, "offset is out of bounds, backing_buffer_sz={}, size={}, offset={}",
backing.GetSize(), size, offset); backing.GetSize(), size, offset);