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A double free may be caused by the function allocate_trace_buffer in the file kernel/trace/trace.c.", "A flaw was found in the allocate_trace_buffer in kernel/trace/trace.c in the debug subsystem, when failure to allocate a dynamic percpu area, a resource cleanup is called. The pointer (buf->buffer) still holds the address and is not set to NULL, which can cause a use-after-free problem, leading to a dangling pointer issue."], "mitigation": {"lang": "en:us", "value": "Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. 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