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[net] Avoid possibility of NULL pointer dereference in MarkBlockAsInFlight(...) 

In the case that the branch ...

    if (itInFlight != mapBlocksInFlight.end() && itInFlight->second.first == nodeid) {

... is taken, there was prior to this commit an implicit assumption that
MarkBlockAsInFlight(...) was being called with its fifth and optional
argument (pit) being present (and non-NULL).
This commit is contained in:
practicalswift 2017-02-28 15:49:49 +01:00
parent 02e5308c1b
commit 95543d8747
1 changed files with 3 additions and 1 deletions
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4
src/net_processing.cpp
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@ -338,7 +338,9 @@ bool MarkBlockAsInFlight(NodeId nodeid, const uint256& hash, const Consensus::Pa
// Short-circuit most stuff in case its from the same node // Short-circuit most stuff in case its from the same node
map<uint256, pair<NodeId, list<QueuedBlock>::iterator> >::iterator itInFlight = mapBlocksInFlight.find(hash); map<uint256, pair<NodeId, list<QueuedBlock>::iterator> >::iterator itInFlight = mapBlocksInFlight.find(hash);
if (itInFlight != mapBlocksInFlight.end() && itInFlight->second.first == nodeid) { if (itInFlight != mapBlocksInFlight.end() && itInFlight->second.first == nodeid) {
*pit = &itInFlight->second.second; if (pit) {
*pit = &itInFlight->second.second;
}
return false; return false;
} }