diff options
| author | Adam Jonas <jonas@chaincode.com> | 2019-10-21 13:17:22 -0400 |
|---|---|---|
| committer | Aurèle Oulès <aurele@oules.com> | 2022-05-05 15:55:44 +0200 |
| commit | 308dd2e93e92f4cac4e7d75478316af9bb2b77b8 (patch) | |
| tree | 520c6a3e925de6de2ded46a439c5b09a528f374f /src/consensus/tx_verify.cpp | |
| parent | b1c5991eebb916755be188f355ad36fe01a3f529 (diff) | |
Sanity assert GetAncestor() != nullptr where appropriate
Add sanity asserts for return value of `CBlockIndex::GetAncestor()` where appropriate.
In validation.cpp `CheckSequenceLocks`, check the return value of `tip->GetAncestor(maxInputHeight)` stored into `lp->maxInputBlock`. If it ever returns `nullptr` because the ancestor isn't found, it's going to be a bad bug to keep going, since a `LockPoints` object with the `maxInputBlock` member set to `nullptr` signifies no relative lock time.
In the other places, the added asserts would prevent accidental dereferencing of a null pointer which is undefined behavior.
Co-Authored-By: Aurèle Oulès <aurele@oules.com>
Co-Authored-By: danra <danra@users.noreply.github.com>
Diffstat (limited to 'src/consensus/tx_verify.cpp')
| -rw-r--r-- | src/consensus/tx_verify.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/consensus/tx_verify.cpp b/src/consensus/tx_verify.cpp index 5738c333ce..154146f08d 100644 --- a/src/consensus/tx_verify.cpp +++ b/src/consensus/tx_verify.cpp @@ -11,6 +11,7 @@ #include <consensus/validation.h> #include <primitives/transaction.h> #include <script/interpreter.h> +#include <util/check.h> #include <util/moneystr.h> bool IsFinalTx(const CTransaction &tx, int nBlockHeight, int64_t nBlockTime) @@ -74,7 +75,7 @@ std::pair<int, int64_t> CalculateSequenceLocks(const CTransaction &tx, int flags int nCoinHeight = prevHeights[txinIndex]; if (txin.nSequence & CTxIn::SEQUENCE_LOCKTIME_TYPE_FLAG) { - int64_t nCoinTime = block.GetAncestor(std::max(nCoinHeight-1, 0))->GetMedianTimePast(); + const int64_t nCoinTime{Assert(block.GetAncestor(std::max(nCoinHeight - 1, 0)))->GetMedianTimePast()}; // NOTE: Subtract 1 to maintain nLockTime semantics // BIP 68 relative lock times have the semantics of calculating // the first block or time at which the transaction would be |