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core: reduce TOCTTOU memory access

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This commit is contained in:
Liam 2023-07-14 22:32:24 -04:00
parent d144168442
commit 9f3f615e05
3 changed files with 11 additions and 20 deletions
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9
src/core/debugger/gdbstub.cpp
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@ -261,10 +261,8 @@ void GDBStub::ExecuteCommand(std::string_view packet, std::vector<DebuggerAction
const size_t addr{static_cast<size_t>(strtoll(command.data(), nullptr, 16))};
const size_t size{static_cast<size_t>(strtoll(command.data() + sep, nullptr, 16))};
if (system.ApplicationMemory().IsValidVirtualAddressRange(addr, size)) {
std::vector<u8> mem(size);
system.ApplicationMemory().ReadBlock(addr, mem.data(), size);
std::vector<u8> mem(size);
if (system.ApplicationMemory().ReadBlock(addr, mem.data(), size)) {
SendReply(Common::HexToString(mem));
} else {
SendReply(GDB_STUB_REPLY_ERR);
@ -281,8 +279,7 @@ void GDBStub::ExecuteCommand(std::string_view packet, std::vector<DebuggerAction
const auto mem_substr{std::string_view(command).substr(mem_sep)};
const auto mem{Common::HexStringToVector(mem_substr, false)};
if (system.ApplicationMemory().IsValidVirtualAddressRange(addr, size)) {
system.ApplicationMemory().WriteBlock(addr, mem.data(), size);
if (system.ApplicationMemory().WriteBlock(addr, mem.data(), size)) {
system.InvalidateCpuInstructionCacheRange(addr, size);
SendReply(GDB_STUB_REPLY_OK);
} else {