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Merge #12561: Check for block corruption in ConnectBlock()

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0e7c52d Shut down if trying to connect a corrupted block (Suhas Daftuar)

Pull request description:

  (Updated OP after reworking the approach)

  Shut down if a corrupted block is found in ConnectBlock().  This prevents an infinite loop trying to connect such a block, and alerts the node operator that there may be potential hardware failure.

Tree-SHA512: f20d56aa9d36d6eeff4c3d13c0fbd14f06a57701bd13c2416d36f0cc4235f81f752139e336a073617e8e803782c5096c960108af122b19a51227de512e9095ee
This commit is contained in:
Wladimir J. van der Laan 2018-04-08 11:08:04 +02:00
commit 24133b177a
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1 changed files with 8 additions and 1 deletions
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9
src/validation.cpp
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@ -1793,8 +1793,15 @@ bool CChainState::ConnectBlock(const CBlock& block, CValidationState& state, CBl
// is enforced in ContextualCheckBlockHeader(); we wouldn't want to
// re-enforce that rule here (at least until we make it impossible for
// GetAdjustedTime() to go backward).
if (!CheckBlock(block, state, chainparams.GetConsensus(), !fJustCheck, !fJustCheck))
if (!CheckBlock(block, state, chainparams.GetConsensus(), !fJustCheck, !fJustCheck)) {
if (state.CorruptionPossible()) {
// We don't write down blocks to disk if they may have been
// corrupted, so this should be impossible unless we're having hardware
// problems.
return AbortNode(state, "Corrupt block found indicating potential hardware failure; shutting down");
}
return error("%s: Consensus::CheckBlock: %s", __func__, FormatStateMessage(state));
}
// verify that the view's current state corresponds to the previous block
uint256 hashPrevBlock = pindex->pprev == nullptr ? uint256() : pindex->pprev->GetBlockHash();