From: Oleg Nesterov <oleg@redhat.com>
To: "Cen Zhang (Microsoft)" <blbllhy@gmail.com>
Cc: brauner@kernel.org, akpm@linux-foundation.org, jack@suse.cz,
avagin@gmail.com, ptikhomirov@virtuozzo.com, mjguzik@gmail.com,
include@grrlz.net, ebiederm@xmission.com, legion@kernel.org,
linux-kernel@vger.kernel.org,
AutonomousCodeSecurity@microsoft.com,
tgopinath@linux.microsoft.com, kys@microsoft.com
Subject: Re: [PATCH v3 1/2] pid: deinline kill_cad_pid
Date: Sun, 19 Jul 2026 18:20:53 +0200 [thread overview]
Message-ID: <alz5ZYLE4kaq_v2P@redhat.com> (raw)
In-Reply-To: <20260719155842.7069-1-blbllhy@gmail.com>
On 07/19, Cen Zhang (Microsoft) wrote:
>
> Move kill_cad_pid() out of the header without changing behavior. This
> prepares for taking a reference to cad_pid under RCU in the following
> fix.
...
> +int kill_cad_pid(int sig, int priv)
> +{
> + return kill_pid(cad_pid, sig, priv);
> +}
Well... this version doesn't address another comment from sashiko.
Without EXPORT_SYMBOL() this can break the modules which use kill_cad_pid().
Say, drivers/acpi/tiny-power-button.c
I am starting to think that we should apply my patch first, it is more
straightforward. Your 2/2 can be trivially rebased on top of it.
Oleg.
next prev parent reply other threads:[~2026-07-19 16:21 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-19 15:58 [PATCH v3 1/2] pid: deinline kill_cad_pid Cen Zhang (Microsoft)
2026-07-19 15:58 ` [PATCH v3 2/2] pid: fix cad_pid use-after-free race Cen Zhang (Microsoft)
2026-07-20 10:09 ` Pavel Tikhomirov
2026-07-19 16:20 ` Oleg Nesterov [this message]
2026-07-19 16:26 ` [PATCH v3 1/2] pid: deinline kill_cad_pid Cen Zhang (Microsoft)
2026-07-20 9:56 ` Pavel Tikhomirov
2026-07-20 13:19 ` Eric W. Biederman
2026-07-20 13:45 ` Oleg Nesterov
2026-07-20 14:01 ` Oleg Nesterov
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