Re: [PATCH net 2/2] selftests: net: packetdrill: add test for negative sk_forward_alloc in tcp_wmem_schedule()

[Kuniyuki Iwashima]

On Thu, Oct 15, 2026 at 12:37 AM Octavian Purdila <tavip@xxxxxxxxxx> wrote:
>
> Add a packetdrill test that drives sk->sk_forward_alloc negative via
> tcp_collapse() on the receive queue while sk->sk_wmem_queued exceeds
> sysctl_tcp_wmem[0], and verifies that a subsequent non-blocking write()
> under TCP memory pressure fails with EAGAIN rather than returning a
> negative copy length from tcp_wmem_schedule() and failing with EFAULT.
>
> Assisted-by: LLM
> Signed-off-by: Octavian Purdila <tavip@xxxxxxxxxx>

Reviewed-by: Kuniyuki Iwashima <kuniyu@xxxxxxxxxx>

Thanks !