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Try to fix cfun registry size check for cross-thread messages

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Agent Kilo 2025-04-28 17:00:23 +08:00
parent f2eaa5dee8
commit a695454dae
1 changed files with 2 additions and 1 deletions
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src/core/ev.c
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@ -3015,7 +3015,8 @@ static JanetEVGenericMessage janet_go_thread_subr(JanetEVGenericMessage args) {
uint32_t count1;
memcpy(&count1, nextbytes, sizeof(count1));
size_t count = (size_t) count1;
if (count > (endbytes - nextbytes) * sizeof(JanetCFunRegistry)) {
/* Use division to avoid overflowing size_t */
if (count > (endbytes - nextbytes - sizeof(count1)) / sizeof(JanetCFunRegistry)) {
janet_panic("thread message invalid");
}
janet_vm.registry_count = count;