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fix: use-after-free in keep-alive tasks

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Sebastian Ullrich 2020-09-04 17:37:14 +02:00
parent ac56a9e79f
commit a1c17ade3a
1 changed files with 2 additions and 1 deletions
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3
src/runtime/object.cpp
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@ -744,7 +744,8 @@ class task_manager {
lock.lock();
}
lean_assert(t->m_imp);
if (t->m_imp->m_keep_alive && !lean_nonzero_rc((lean_object *)t)) {
// deactivate keep-alive tasks without live references only after their final execution (`v != nulltpr`)
if (v != nullptr && t->m_imp->m_keep_alive && !lean_nonzero_rc((lean_object *)t)) {
deactivate_task_core(lock, t);
}
if (t->m_imp->m_deleted) {