Re: [PATCH bpf-next] selftests/bpf: Add test for struct_ops __ref argument in any position

[patchwork-bot+netdevbpf]

Hello:

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

On Sun, 22 Mar 2026 03:10:38 +0530 you wrote:
> Add a selftest to verify that the verifier correctly identifies refcounted
> arguments in struct_ops programs, even when they are not the first
> argument. This ensures that the restriction on tail calls for programs
> with __ref arguments is properly enforced regardless of which argument
> they appear in.
> 
> This test verifies the fix for check_struct_ops_btf_id() proposed by
> Keisuke Nishimura [0], which corrected a bug where only the first
> argument was checked for the refcounted flag.
> The test includes:
> - An update to bpf_testmod to add 'test_refcounted_multi', an operator with
>   three arguments where the third is tagged with "__ref".
> - A BPF program 'test_refcounted_multi' that attempts a tail call.
> - A test runner that asserts the verifier rejects the program with
>   "program with __ref argument cannot tail call".
> 
> [...]

Here is the summary with links:
  - [bpf-next] selftests/bpf: Add test for struct_ops __ref argument in any position
    https://git.kernel.org/bpf/bpf-next/c/b43d574c0032

You are awesome, thank you!
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