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Fixed segfault with checkpoints loading

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Bounds checking on blockchain_storage' m_blocks.size() when validating
against checkpoints.  Also moved initial json & DNS checkpoints load to
after blockchain init.
This commit is contained in:
Thomas Winget 2014-09-27 17:46:12 -04:00
parent b261d9207b
commit 7568f89c55
3 changed files with 10 additions and 2 deletions
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6
src/cryptonote_core/blockchain_storage.cpp
View file

@ -1793,6 +1793,12 @@ bool blockchain_storage::update_checkpoints(const std::string& file_path)
for (const auto& pt : points)
{
// if the checkpoint is for a block we don't have yet, move on
if (pt.first >= m_blocks.size())
{
continue;
}
if (!m_checkpoints.check_block(pt.first, get_block_hash(m_blocks[pt.first].bl)))
{
// if we're enforcing dns checkpoints, roll back to a couple of blocks before the checkpoint

4
src/cryptonote_core/cryptonote_core.cpp
View file

@ -150,6 +150,10 @@ namespace cryptonote
r = m_blockchain_storage.init(m_config_folder, testnet);
CHECK_AND_ASSERT_MES(r, false, "Failed to initialize blockchain storage");
// load json & DNS checkpoints, and verify them
// with respect to what blocks we already have
update_checkpoints();
r = m_miner.init(vm, testnet);
CHECK_AND_ASSERT_MES(r, false, "Failed to initialize blockchain storage");

2
src/daemon/daemon.cpp
View file

@ -221,8 +221,6 @@ int main(int argc, char* argv[])
} else {
ccore.set_checkpoints(std::move(checkpoints));
ccore.set_checkpoints_file_path(checkpoint_json_hashfile_fullpath.string());
res = ccore.update_checkpoints();
CHECK_AND_ASSERT_MES(res, 1, "Failed to load initial checkpoints");
}
cryptonote::t_cryptonote_protocol_handler<cryptonote::core> cprotocol(ccore, NULL);