bitcoin/libblkmaker
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Bugfix: blkmk_append_coinbase_safe2: Check for unexpected larger values before subtracting (in sigop checks)

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This commit is contained in:
Luke Dashjr 2016-08-13 08:17:25 +00:00
parent f333f3c662
commit 6c56da6a04
1 changed files with 1 additions and 1 deletions
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2
blkmaker.c
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@ -385,7 +385,7 @@ bool _blkmk_append_cb(blktemplate_t * const tmpl, void * const vout, const void
out[cbScriptSigLen] += appendsz;
memcpy(outExtranonce, append, appendsz);
const int16_t sigops_counted = (tmpl->cbtxn->sigops_ - orig_scriptSig_sigops) + blkmk_count_sigops(&out[cbScriptSigLen + 1], out[cbScriptSigLen]);
const int16_t sigops_counted = tmpl->cbtxn->sigops_ + blkmk_count_sigops(&out[cbScriptSigLen + 1], out[cbScriptSigLen]) - orig_scriptSig_sigops;
if (tmpl->txns_sigops >= 0 && tmpl->txns_sigops + sigops_counted > tmpl->sigoplimit) {
// Overflowed :(
if (out == in) {