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author | Pieter Wuille <pieter.wuille@gmail.com> | 2014-12-11 13:35:14 +0100 |
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committer | Pieter Wuille <pieter.wuille@gmail.com> | 2014-12-22 15:10:56 +0100 |
commit | 34970223472c9e83689a1c710eebc7c16f152b02 (patch) | |
tree | 8a36e1090fb3d25d2df3f9806704c4db04b6b581 /src/main.cpp | |
parent | 203632d20b3107009f45fae56cc3f7d828b16660 (diff) | |
download | bitcoin-34970223472c9e83689a1c710eebc7c16f152b02.tar.xz |
Reject headers that build on an invalid parent
Diffstat (limited to 'src/main.cpp')
-rw-r--r-- | src/main.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/main.cpp b/src/main.cpp index ad3f70eed9..762a404032 100644 --- a/src/main.cpp +++ b/src/main.cpp @@ -449,6 +449,10 @@ void FindNextBlocksToDownload(NodeId nodeid, unsigned int count, std::vector<CBl // are not yet downloaded and not in flight to vBlocks. In the mean time, update // pindexLastCommonBlock as long as all ancestors are already downloaded. BOOST_FOREACH(CBlockIndex* pindex, vToFetch) { + if (!pindex->IsValid(BLOCK_VALID_TREE)) { + // We consider the chain that this peer is on invalid. + return; + } if (pindex->nStatus & BLOCK_HAVE_DATA) { if (pindex->nChainTx) state->pindexLastCommonBlock = pindex; @@ -2563,6 +2567,8 @@ bool AcceptBlockHeader(const CBlockHeader& block, CValidationState& state, CBloc if (mi == mapBlockIndex.end()) return state.DoS(10, error("%s : prev block not found", __func__), 0, "bad-prevblk"); pindexPrev = (*mi).second; + if (pindexPrev->nStatus & BLOCK_FAILED_MASK) + return state.DoS(100, error("%s : prev block invalid", __func__), REJECT_INVALID, "bad-prevblk"); } if (!ContextualCheckBlockHeader(block, state, pindexPrev)) |