Re: [PATCH bpf-next v4 00/12] bpf: Allow arena pointers in by-value returns

[patchwork-bot+netdevbpf@kernel.org]

Hello:

This series was applied to bpf/bpf-next.git (master)
by Alexei Starovoitov <ast@kernel.org>:

On Fri, 28 Aug 2026 23:15:14 -0700 you wrote:
> A function returning a struct by value may only return one whose members
> are all scalars. That is stricter than it needs to be: an arena pointer
> is safe to hand over as raw register bits, and both a global function
> and a kfunc can already return one on its own.
> 
> This patch set allows returning arena pointer(s) (as member(s) of a
> struct) for global functions and kfuncs. Any other pointer member stays
> rejected, as it would be laundered into a scalar and escape provenance
> and reference tracking.
> 
> [...]

Here is the summary with links:
  - [bpf-next,v4,01/12] bpf: Record each half of a paired return value in verifier diagnostics
    https://git.kernel.org/bpf/bpf-next/c/f62a9b82700c
  - [bpf-next,v4,02/12] bpf: Drop the recursion depth argument of btf_type_is_scalar_struct()
    https://git.kernel.org/bpf/bpf-next/c/77983371742e
  - [bpf-next,v4,03/12] bpf: Add btf_type_is_arena_ptr()
    https://git.kernel.org/bpf/bpf-next/c/3fc3e7331af6
  - [bpf-next,v4,04/12] bpf: Let the by-value struct walk take the kinds of member it accepts
    https://git.kernel.org/bpf/bpf-next/c/8d7ea1b752e5
  - [bpf-next,v4,05/12] bpf: Let a by-value struct nest arrays and structs freely
    https://git.kernel.org/bpf/bpf-next/c/9e0195cd1d31
  - [bpf-next,v4,06/12] bpf: Report which member makes a kfunc return type unsupported
    https://git.kernel.org/bpf/bpf-next/c/282d07dc6c74
  - [bpf-next,v4,07/12] bpf: Allow a global function to return arena pointers by value
    https://git.kernel.org/bpf/bpf-next/c/ff08e6b79ee1
  - [bpf-next,v4,08/12] bpf: Allow arena pointers in a by-value kfunc return
    https://git.kernel.org/bpf/bpf-next/c/9046109974dd
  - [bpf-next,v4,09/12] selftests/bpf: Check the member named for an unsupported kfunc return type
    https://git.kernel.org/bpf/bpf-next/c/cc03706d92c9
  - [bpf-next,v4,10/12] selftests/bpf: Test global functions returning arena pointers by value
    https://git.kernel.org/bpf/bpf-next/c/18bc61838842
  - [bpf-next,v4,11/12] selftests/bpf: Test kfuncs returning arena pointers by value
    https://git.kernel.org/bpf/bpf-next/c/f7213961e8e2
  - [bpf-next,v4,12/12] docs/bpf: Document arena pointers in a by-value return
    https://git.kernel.org/bpf/bpf-next/c/25b0d73a7742

You are awesome, thank you!
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