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libstrat: Allow nullptr buffers if 0 size. (closes #255)

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This commit is contained in:
Michael Scire 2018-11-04 21:52:26 -08:00
parent 78a47dba6d
commit 3ed239296a
2 changed files with 7 additions and 2 deletions
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5
stratosphere/fs_mitm/source/fsmitm_layeredrom.cpp
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@ -46,6 +46,11 @@ LayeredRomFS::LayeredRomFS(std::shared_ptr<RomInterfaceStorage> s_r, std::shared
Result LayeredRomFS::Read(void *buffer, size_t size, u64 offset) {
/* Size zero reads should always succeed. */
if (size == 0) {
return 0;
}
/* Validate size. */
u64 virt_size = (*this->p_source_infos)[this->p_source_infos->size() - 1].virtual_offset + (*this->p_source_infos)[this->p_source_infos->size() - 1].size;
if (offset >= virt_size) {

4
stratosphere/libstratosphere/include/stratosphere/ipc/ipc_serialization.hpp
View file

@ -306,9 +306,9 @@ struct Validator {
static constexpr bool ValidateCommandArgument(IpcResponseContext *ctx, size_t& a_index, size_t& b_index, size_t& x_index, size_t& h_index, size_t& cur_c_size_offset, size_t& total_c_size) {
constexpr ArgType argT = GetArgType<T>();
if constexpr (argT == ArgType::InBuffer) {
return ctx->request.Buffers[a_index] != nullptr && ctx->request.BufferDirections[a_index] == BufferDirection_Send && ctx->request.BufferTypes[a_index++] == T::expected_type;
return (ctx->request.Buffers[a_index] != nullptr || ctx->request.BufferSizes[a_index] == 0) && ctx->request.BufferDirections[a_index] == BufferDirection_Send && ctx->request.BufferTypes[a_index++] == T::expected_type;
} else if constexpr (argT == ArgType::OutBuffer) {
return ctx->request.Buffers[b_index] != nullptr && ctx->request.BufferDirections[b_index] == BufferDirection_Recv && ctx->request.BufferTypes[b_index++] == T::expected_type;
return (ctx->request.Buffers[b_index] != nullptr || ctx->request.BufferSizes[b_index] == 0) && ctx->request.BufferDirections[b_index] == BufferDirection_Recv && ctx->request.BufferTypes[b_index++] == T::expected_type;
} else if constexpr (argT == ArgType::InPointer) {
return ctx->request.Statics[x_index++] != nullptr;
} else if constexpr (argT == ArgType::InHandle) {