Re: [PATCH v3 1/2] bpf: restore the ebpf program ID for BPF_AUDIT_UNLOAD and PERF_BPF_EVENT_PROG_UNLOAD

Hello:

This series was applied to bpf/bpf.git (master)
by Alexei Starovoitov <[email protected]>:

On Fri,  6 Jan 2023 10:43:59 -0500 you wrote:
> When changing the ebpf program put() routines to support being called
> from within IRQ context the program ID was reset to zero prior to
> calling the perf event and audit UNLOAD record generators, which
> resulted in problems as the ebpf program ID was bogus (always zero).
> This patch addresses this problem by removing an unnecessary call to
> bpf_prog_free_id() in __bpf_prog_offload_destroy() and adjusting
> __bpf_prog_put() to only call bpf_prog_free_id() after audit and perf
> have finished their bpf program unload tasks in
> bpf_prog_put_deferred().  For the record, no one can determine, or
> remember, why it was necessary to free the program ID, and remove it
> from the IDR, prior to executing bpf_prog_put_deferred();
> regardless, both Stanislav and Alexei agree that the approach in this
> patch should be safe.
> 
> [...]

Here is the summary with links:
  - [v3,1/2] bpf: restore the ebpf program ID for BPF_AUDIT_UNLOAD and PERF_BPF_EVENT_PROG_UNLOAD
    https://git.kernel.org/bpf/bpf/c/ef01f4e25c17
  - [v3,2/2] bpf: remove the do_idr_lock parameter from bpf_prog_free_id()
    https://git.kernel.org/bpf/bpf/c/e7895f017b79

You are awesome, thank you!
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