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SubjectRe: [PATCH v7 3/5] bpf: add a bpf_override_function helper
On 11/22/2017 10:23 PM, Josef Bacik wrote:
> From: Josef Bacik <>
> Error injection is sloppy and very ad-hoc. BPF could fill this niche
> perfectly with it's kprobe functionality. We could make sure errors are
> only triggered in specific call chains that we care about with very
> specific situations. Accomplish this with the bpf_override_funciton
> helper. This will modify the probe'd callers return value to the
> specified value and set the PC to an override function that simply
> returns, bypassing the originally probed function. This gives us a nice
> clean way to implement systematic error injection for all of our code
> paths.
> Acked-by: Alexei Starovoitov <>
> Acked-by: Ingo Molnar <>
> Signed-off-by: Josef Bacik <>

Series looks good to me as well; BPF bits:

Acked-by: Daniel Borkmann <>

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