From: Alexei Starovoitov <a...@plumgrid.com>
Date: Thu, 22 Oct 2015 17:10:14 -0700
> Fix safety checks for bpf_perf_event_read():
> - only non-inherited events can be added to perf_event_array map
> (do this check statically at map insertion time)
> - dynamically check that event is local and !pmu->count
> Otherwise buggy bpf program can cause kernel splat.
>
> Also fix error path after perf_event_attrs()
> and remove redundant 'extern'.
>
> Fixes: 35578d798400 ("bpf: Implement function bpf_perf_event_read() that get
> the selected hardware PMU conuter")
> Signed-off-by: Alexei Starovoitov <a...@kernel.org>
Applied, although my tendancy is to agree with the sentiment that you must
respect the entire universe of valid 64-bit counter values. I do not buy
the arguments about values overlapping error codes being unlikely or not
worth worrying about.
Just FYI...
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
