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net: Add missing lock in ProcessHeadersMessage(...)

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Reading the variable mapBlockIndex requires holding the mutex cs_main.

The new "Disconnect outbound peers relaying invalid headers" code
added in commit 37886d5e2f9992678dea4b1bd893f4f10d61d3ad and merged
as part of #11568 two days ago did not lock cs_main prior to accessing
mapBlockIndex.
This commit is contained in:
practicalswift 2017-10-30 14:28:19 +01:00
parent bb9ab0fccf
commit 2530bf27b7
1 changed files with 1 additions and 1 deletions
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2
src/net_processing.cpp
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@ -1262,8 +1262,8 @@ bool static ProcessHeadersMessage(CNode *pfrom, CConnman *connman, const std::ve
if (!ProcessNewBlockHeaders(headers, state, chainparams, &pindexLast, &first_invalid_header)) {
int nDoS;
if (state.IsInvalid(nDoS)) {
LOCK(cs_main);
if (nDoS > 0) {
LOCK(cs_main);
Misbehaving(pfrom->GetId(), nDoS);
}
if (punish_duplicate_invalid && mapBlockIndex.find(first_invalid_header.GetHash()) != mapBlockIndex.end()) {