[PATCH bpf-next] bpf: Replace scratch PTE atomically when allocating arena pages

[patchwork-bot+netdevbpf at kernel.org]

Hello:

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

On Mon,  1 Jun 2026 08:37:28 -1000 you wrote:
> apply_range_set_cb() maps the pages for a new arena allocation and returned
> -EBUSY when the target PTE was already populated. Kernel-fault recovery
> leaves the per-arena scratch page in unallocated arena PTEs, so a later
> bpf_arena_alloc_pages() over such a page hits that -EBUSY, and every
> subsequent allocation of it fails the same way. Allocation must install the
> real page over scratch instead.
> 
> [...]

Here is the summary with links:
  - [bpf-next] bpf: Replace scratch PTE atomically when allocating arena pages
    https://git.kernel.org/bpf/bpf-next/c/f64c723741c9

You are awesome, thank you!
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