On 04/09, Prashant Bhole wrote:
>
> It occurs because task_struct is freed before perf_event which refers
> to the task and task flags are checked while teardown of the event.
> perf_event_alloc() assigns task_struct to hw.target of perf_event,
> but there is no reference counting for it.
>
> As a
On Mon, Apr 09, 2018 at 07:03:46PM +0900, Prashant Bhole wrote:
> A use-after-free bug was caught by KASAN while running usdt related
> code. (BCC project. bcc/tests/python/test_usdt2.py)
>
>
> Allocated by task 870:
> kasan_kmalloc+0xa0/0xd0
> kmem_cache_alloc_node+0x11a/0x430
> copy_process
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