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Code Issues Releases Wiki Activity

Disallow recursive library cells (#868)

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* Disallow recursive library cells

* Stop emulation of external messages on accept

---------

Co-authored-by: SpyCheese <mikle98@yandex.ru>
This commit is contained in:
EmelyanenkoK 2024-01-22 12:34:49 +03:00 • committed by GitHub
parent 128a85bee5
commit 42d4c051ef
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7 changed files with 50 additions and 0 deletions
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5
crypto/vm/cells/CellSlice.cpp
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@ -1056,6 +1056,7 @@ std::ostream& operator<<(std::ostream& os, Ref<CellSlice> cs_ref) {
// If can_be_special is not null, then it is allowed to load special cell
// Flag whether loaded cell is actually special will be stored into can_be_special
VirtualCell::LoadedCell load_cell_slice_impl(Ref<Cell> cell, bool* can_be_special) {
bool library_loaded = false;
while (true) {
auto* vm_state_interface = VmStateInterface::get();
if (vm_state_interface) {
@ -1076,6 +1077,10 @@ VirtualCell::LoadedCell load_cell_slice_impl(Ref<Cell> cell, bool* can_be_specia
*can_be_special = loaded_cell.data_cell->is_special();
} else if (loaded_cell.data_cell->is_special()) {
if (loaded_cell.data_cell->special_type() == DataCell::SpecialType::Library) {
if (library_loaded) {
throw VmError{Excno::cell_und, "failed to load library cell: recursive library cells are not allowed"};
}
library_loaded = true;
if (vm_state_interface) {
CellSlice cs(std::move(loaded_cell));
DCHECK(cs.size() == Cell::hash_bits + 8);