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More defensive checking of value for seed height.

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This commit is contained in:
kevacoin 2021-12-31 19:53:58 -08:00
parent 583a909f4a
commit 9c4c306499
2 changed files with 7 additions and 4 deletions
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2
configure.ac
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@ -280,7 +280,7 @@ AX_CHECK_COMPILE_FLAG([-maes],[[AES_CFLAGS="-maes"]],[[AES_CFLAGS="no"]],[[$CXXF
if test x$AES_CFLAGS = xno; then if test x$AES_CFLAGS = xno; then
AC_MSG_ERROR("Compiler does not support -maes which is required by Cryptonight.") AC_MSG_ERROR("Compiler does not support -maes which is required by Cryptonight.")
fi fi
CFLAGS="$CXXFLAGS $AES_CFLAGS" CFLAGS="$CFLAGS $AES_CFLAGS"
TEMP_CXXFLAGS="$CXXFLAGS" TEMP_CXXFLAGS="$CXXFLAGS"
CXXFLAGS="$CXXFLAGS $SSE42_CXXFLAGS" CXXFLAGS="$CXXFLAGS $SSE42_CXXFLAGS"

9
src/primitives/block.cpp
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@ -20,13 +20,16 @@ extern "C" void cn_fast_hash(const void *data, size_t length, char *hash);
static void cn_get_block_hash_by_height(uint64_t seed_height, char cnHash[32]) static void cn_get_block_hash_by_height(uint64_t seed_height, char cnHash[32])
{ {
CBlockIndex* pblockindex = chainActive[seed_height]; CBlockIndex* pblockindex = chainActive[seed_height];
if (pblockindex == NULL) { if (pblockindex == nullptr) {
// This will happen during initial block downloading, or when we // This will happen during initial block downloading, or when we
// are out of sync by more than at least SEEDHASH_EPOCH_BLOCKS blocks. // are out of sync by more than at least SEEDHASH_EPOCH_BLOCKS blocks.
LOCK(cs_main); LOCK(cs_main);
pblockindex = mapBlockSeedHeight.find(seed_height)->second; std::map<uint64_t, CBlockIndex*>::iterator iter = mapBlockSeedHeight.find(seed_height);
if (iter != mapBlockSeedHeight.end()) {
pblockindex = iter->second;
}
} }
if (pblockindex == NULL) { if (pblockindex == nullptr) {
return; return;
} }
uint256 blockHash = pblockindex->GetBlockHash(); uint256 blockHash = pblockindex->GetBlockHash();