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Harden against mistakes handling invalid blocks

Fixes a bug in AcceptBlock() in invoking CheckBlock() with incorrect
arguments, and restores a call to CheckBlock() from ProcessNewBlock()
as belt-and-suspenders.

Updates the (overspecified) tests to match behavior.
0.14
Suhas Daftuar 8 years ago
parent
commit
ba803efb68
  1. 4
      qa/rpc-tests/p2p-fullblocktest.py
  2. 16
      src/validation.cpp

4
qa/rpc-tests/p2p-fullblocktest.py

@ -398,7 +398,7 @@ class FullBlockTest(ComparisonTestFramework): @@ -398,7 +398,7 @@ class FullBlockTest(ComparisonTestFramework):
# Extend the b26 chain to make sure bitcoind isn't accepting b26
b27 = block(27, spend=out[7])
yield rejected(RejectResult(16, b'bad-prevblk'))
yield rejected(RejectResult(0, b'bad-prevblk'))
# Now try a too-large-coinbase script
tip(15)
@ -410,7 +410,7 @@ class FullBlockTest(ComparisonTestFramework): @@ -410,7 +410,7 @@ class FullBlockTest(ComparisonTestFramework):
# Extend the b28 chain to make sure bitcoind isn't accepting b28
b29 = block(29, spend=out[7])
yield rejected(RejectResult(16, b'bad-prevblk'))
yield rejected(RejectResult(0, b'bad-prevblk'))
# b30 has a max-sized coinbase scriptSig.
tip(23)

16
src/validation.cpp

@ -3187,7 +3187,7 @@ static bool AcceptBlock(const std::shared_ptr<const CBlock>& pblock, CValidation @@ -3187,7 +3187,7 @@ static bool AcceptBlock(const std::shared_ptr<const CBlock>& pblock, CValidation
}
if (fNewBlock) *fNewBlock = true;
if (!CheckBlock(block, state, chainparams.GetConsensus(), GetAdjustedTime()) ||
if (!CheckBlock(block, state, chainparams.GetConsensus()) ||
!ContextualCheckBlock(block, state, chainparams.GetConsensus(), pindex->pprev)) {
if (state.IsInvalid() && !state.CorruptionPossible()) {
pindex->nStatus |= BLOCK_FAILED_VALID;
@ -3229,13 +3229,19 @@ static bool AcceptBlock(const std::shared_ptr<const CBlock>& pblock, CValidation @@ -3229,13 +3229,19 @@ static bool AcceptBlock(const std::shared_ptr<const CBlock>& pblock, CValidation
bool ProcessNewBlock(const CChainParams& chainparams, const std::shared_ptr<const CBlock> pblock, bool fForceProcessing, bool *fNewBlock)
{
{
LOCK(cs_main);
// Store to disk
CBlockIndex *pindex = NULL;
if (fNewBlock) *fNewBlock = false;
CValidationState state;
bool ret = AcceptBlock(pblock, state, chainparams, &pindex, fForceProcessing, NULL, fNewBlock);
// Ensure that CheckBlock() passes before calling AcceptBlock, as
// belt-and-suspenders.
bool ret = CheckBlock(*pblock, state, chainparams.GetConsensus());
LOCK(cs_main);
if (ret) {
// Store to disk
ret = AcceptBlock(pblock, state, chainparams, &pindex, fForceProcessing, NULL, fNewBlock);
}
CheckBlockIndex(chainparams.GetConsensus());
if (!ret) {
GetMainSignals().BlockChecked(*pblock, state);

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