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Fix some locks

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This makes sure that cs_filter is never held while taking cs_main
or CNode::cs_vSend.
This commit is contained in:
Pieter Wuille 2016-08-26 21:07:05 +02:00
parent bb566761fb
commit 144ed76ea0
1 changed files with 21 additions and 15 deletions
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36
src/main.cpp
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@ -4781,10 +4781,16 @@ void static ProcessGetData(CNode* pfrom, const Consensus::Params& consensusParam
pfrom->PushMessage(NetMsgType::BLOCK, block);
else if (inv.type == MSG_FILTERED_BLOCK)
{
LOCK(pfrom->cs_filter);
if (pfrom->pfilter)
bool send = false;
CMerkleBlock merkleBlock;
{
CMerkleBlock merkleBlock(block, *pfrom->pfilter);
LOCK(pfrom->cs_filter);
if (pfrom->pfilter) {
send = true;
merkleBlock = CMerkleBlock(block, *pfrom->pfilter);
}
}
if (send) {
pfrom->PushMessage(NetMsgType::MERKLEBLOCK, merkleBlock);
// CMerkleBlock just contains hashes, so also push any transactions in the block the client did not see
// This avoids hurting performance by pointlessly requiring a round-trip
@ -6052,8 +6058,6 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
CBloomFilter filter;
vRecv >> filter;
LOCK(pfrom->cs_filter);
if (!filter.IsWithinSizeConstraints())
{
// There is no excuse for sending a too-large filter
@ -6062,11 +6066,12 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
}
else
{
LOCK(pfrom->cs_filter);
delete pfrom->pfilter;
pfrom->pfilter = new CBloomFilter(filter);
pfrom->pfilter->UpdateEmptyFull();
pfrom->fRelayTxes = true;
}
pfrom->fRelayTxes = true;
}
@ -6077,20 +6082,21 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
// Nodes must NEVER send a data item > 520 bytes (the max size for a script data object,
// and thus, the maximum size any matched object can have) in a filteradd message
if (vData.size() > MAX_SCRIPT_ELEMENT_SIZE)
{
LOCK(cs_main);
Misbehaving(pfrom->GetId(), 100);
bool bad = false;
if (vData.size() > MAX_SCRIPT_ELEMENT_SIZE) {
bad = true;
} else {
LOCK(pfrom->cs_filter);
if (pfrom->pfilter)
if (pfrom->pfilter) {
pfrom->pfilter->insert(vData);
else
{
LOCK(cs_main);
Misbehaving(pfrom->GetId(), 100);
} else {
bad = true;
}
}
if (bad) {
LOCK(cs_main);
Misbehaving(pfrom->GetId(), 100);
}
}