Re: [PATCH bpf v3 2/3] bpf: Skip the progs of trampoline images that are being freed

[Alexei Starovoitov]

On Thu Sep 24, 2026 at 5:05 PM UTC, Florent Revest (Anthropic) wrote:
> call sequences, which replaces ip_after_call. Tasks that are still in an
> image that was put skip all of its progs from then on, including the
> ones that are still attached, like they already skipped its fexit
> progs. The call to the original function is left alone, a task that is
> before it in the image still has to run it.

So I slept on it and you were right to argue that skipping fmod_ret
is a bad idea. bpf-ci explains it well.

So let's patch only the progs that are being detached instead of all.
Pretty much what you had in v2, but also explain why list is needed
and why just patching previous tramp is not enough.

Also see CI re: lower limit for x86.

Adjusting BPF_MAX_TRAMP_LINKS for large page sizes is a bigger change.
Ignore it for now.

pw-bot: cr