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| author | practicalswift <practicalswift@users.noreply.github.com> | 2017-11-10 15:22:54 +0100 |
|---|---|---|
| committer | practicalswift <practicalswift@users.noreply.github.com> | 2017-11-10 15:37:37 +0100 |
| commit | 63c2d83e58c7506a1030e7fe4dcea84cdce97147 (patch) | |
| tree | 677047ac759c3a07d737cdd8195f8ee87ebc03d0 /src/net_processing.cpp | |
| parent | fe503e118f08a9a781d8cc1a6cdde5a615178433 (diff) | |
Explicitly state assumption that state.m_chain_sync.m_work_header != nullptr in ConsiderEviction
Static analyzer (and humans!) will see ...
```
else if (state.m_chain_sync.m_timeout == 0 || (state.m_chain_sync.m_work_header != nullptr && ...
```
... and infer that state.m_chain_sync.m_work_header might be set to nullptr,
and thus flag `state.m_chain_sync.m_work_header->GetBlockHash().ToString()`
as a potential null pointer dereference.
This commit makes the tacit assumption (m_work_header != nullptr) explicit.
Code introduced in 5a6d00 ("Permit disconnection of outbound peers on
bad/slow chains") which was merged into master four days ago.
Diffstat (limited to 'src/net_processing.cpp')
| -rw-r--r-- | src/net_processing.cpp | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/net_processing.cpp b/src/net_processing.cpp index 8e503f89db..38b9703d91 100644 --- a/src/net_processing.cpp +++ b/src/net_processing.cpp @@ -3006,6 +3006,7 @@ void PeerLogicValidation::ConsiderEviction(CNode *pto, int64_t time_in_seconds) LogPrintf("Disconnecting outbound peer %d for old chain, best known block = %s\n", pto->GetId(), state.pindexBestKnownBlock != nullptr ? state.pindexBestKnownBlock->GetBlockHash().ToString() : "<none>"); pto->fDisconnect = true; } else { + assert(state.m_chain_sync.m_work_header); LogPrint(BCLog::NET, "sending getheaders to outbound peer=%d to verify chain work (current best known block:%s, benchmark blockhash: %s)\n", pto->GetId(), state.pindexBestKnownBlock != nullptr ? state.pindexBestKnownBlock->GetBlockHash().ToString() : "<none>", state.m_chain_sync.m_work_header->GetBlockHash().ToString()); connman->PushMessage(pto, msgMaker.Make(NetMsgType::GETHEADERS, chainActive.GetLocator(state.m_chain_sync.m_work_header->pprev), uint256())); state.m_chain_sync.m_sent_getheaders = true; |