From: Oleg Nesterov <oleg@redhat.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Yonghong Song <yhs@fb.com>, Kui-Feng Lee <kuifeng@fb.com>,
Andrii Nakryiko <andrii@kernel.org>,
Martin KaFai Lau <martin.lau@kernel.org>,
bpf@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] bpf: task_group_seq_get_next: cleanup the usage of next_thread()
Date: Fri, 25 Aug 2023 15:50:42 +0200 [thread overview]
Message-ID: <20230825135041.GB29260@redhat.com> (raw)
In-Reply-To: <87fs47qm5u.fsf@email.froward.int.ebiederm.org>
On 08/25, Eric W. Biederman wrote:
>
> For the record I find this code confusing, and wrong.
Oh, yes...
> and has
> a built in race condition which means it could wind up iterating through
> a different process.
Yes, common->pid and/or common->pid_visiting can be reused
but I am not going to try to fix this ;)
> Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Thanks!
Oleg.
prev parent reply other threads:[~2023-08-25 13:51 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-21 15:09 [PATCH] bpf: task_group_seq_get_next: cleanup the usage of next_thread() Oleg Nesterov
2023-08-21 17:55 ` Kui-Feng Lee
2023-08-21 18:34 ` Oleg Nesterov
2023-08-21 19:54 ` Oleg Nesterov
2023-08-21 20:24 ` Kui-Feng Lee
2023-08-21 20:03 ` [PATCH] bpf: task_group_seq_get_next: cleanup the usage of get/put_task_struct Oleg Nesterov
2023-08-21 20:32 ` Kui-Feng Lee
2023-08-21 20:38 ` Kui-Feng Lee
2023-08-22 1:06 ` Yonghong Song
2023-08-22 12:05 ` Oleg Nesterov
2023-08-22 12:05 ` [PATCH V2] " Oleg Nesterov
2023-08-25 14:28 ` Daniel Borkmann
2023-08-25 16:26 ` Oleg Nesterov
2023-08-25 12:41 ` [PATCH] bpf: task_group_seq_get_next: cleanup the usage of next_thread() Oleg Nesterov
2023-08-25 13:36 ` Eric W. Biederman
2023-08-25 13:50 ` Oleg Nesterov [this message]
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