[SYCL][UR][L0 v2] fix use after free on queue #18101
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There was a potential race: if getEventEndTimestamp returns false and just after that the queue finishes and is destroyed, we would call deferEventRelease on invalid queue. This patch reworks the logic for deferring event release. Instead of registering the events to be released in the queue, we just clear adjustedEventStartTimestamp and adjustedEventEndTimestamp to mark the event as not timestamped. Since events are never actually destroyed, only returned to the pool, any pending timestamp write will always succeed. Since we are only dealing with in-order queues, the timestamp can only increase.
The queue can already be released.
pbalcer
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Apr 22, 2025
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@intel/llvm-gatekeepers This is ready to be merged |
KornevNikita
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