[XPTI] Fix data races in tracepoint lookup and deletion#21874
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Several functions in the Tracepoints class accessed MUID64Check and dereferenced tracepoint pointers without holding MTracepointMutex, allowing use-after-free when concurrent threads perform lookups (xptiLookupEvent) and deletions (xptiDeleteTracepoint). Fixes: - lookupEventData: acquire shared lock before MUID64Check access - releaseEvent: acquire exclusive lock before MUID64Check access (was only locked for the erase/delete, not the preceding check) - isValidUID64: acquire shared lock before MUID64Check access - deleteTracepoint: move TP->MUId read inside the exclusive lock - findEvent, queryPayloadByUID, lookupPayload: move into implemenation into new thread-safe Tracepoints methods
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cperkinsintel
approved these changes
Apr 27, 2026
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Several functions in the Tracepoints class accessed MUID64Check and dereferenced tracepoint pointers without holding MTracepointMutex, allowing use-after-free when concurrent threads perform lookups (xptiLookupEvent) and deletions (xptiDeleteTracepoint).
Fixes: