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Qutex:backoff: Fix use after free

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This commit is contained in:
Hayodea Hekol
2026-03-05 20:02:55 -04:00
parent dab5477249
commit e98aae7e7e
1 changed files with 3 additions and 3 deletions
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6
src/qutex.cpp
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@@ -253,7 +253,7 @@ void Qutex::backoff(
#ifdef CONFIG_ENABLE_DEBUG_LOCKS #ifdef CONFIG_ENABLE_DEBUG_LOCKS
currOwner = nullptr; currOwner = nullptr;
#endif #endif
LockerAndInvokerBase &newFront = *queue.front(); std::shared_ptr<LockerAndInvokerBase> newFront = queue.front();
lock.release(); lock.release();
@@ -268,7 +268,7 @@ void Qutex::backoff(
* Hence there ought to be no way for the failedAcquirer to be at the front * Hence there ought to be no way for the failedAcquirer to be at the front
* of the queue at this point UNLESS the queue has only one item in it. * of the queue at this point UNLESS the queue has only one item in it.
*/ */
if (newFront == failedAcquirer && nQItems > 1) if (*newFront == failedAcquirer && nQItems > 1)
{ {
throw std::runtime_error( throw std::runtime_error(
std::string(__func__) + std::string(__func__) +
@@ -304,7 +304,7 @@ void Qutex::backoff(
* is backing off of a qutex within which it's the only waiter. * is backing off of a qutex within which it's the only waiter.
*/ */
if (nQItems > 1) { if (nQItems > 1) {
newFront.awaken(); newFront->awaken();
} }
} }