From: Oleg Nesterov <oleg@redhat.com>
To: Christian Brauner <brauner@kernel.org>
Cc: Chris Mason <mason@kernel.org>,
linux-fsdevel@vger.kernel.org, Jens Axboe <axboe@kernel.dk>,
Alexander Viro <viro@zeniv.linux.org.uk>, Jan Kara <jack@suse.cz>,
NeilBrown <neil@brown.name>, Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
linux-mm@kvack.org, io-uring@vger.kernel.org,
stable@vger.kernel.org
Subject: Re: [PATCH v3 09/17] ptrace: refuse to change the signal mask of a user worker
Date: Mon, 21 Sep 2026 16:14:10 +0200 [thread overview]
Message-ID: <arE7soBASlufuPaI@redhat.com> (raw)
In-Reply-To: <20260921-work-coredump-fixes-v3-9-8e4adb1619e6@kernel.org>
On 09/21, Christian Brauner wrote:
>
> --- a/kernel/ptrace.c
> +++ b/kernel/ptrace.c
> @@ -1227,6 +1227,12 @@ int ptrace_request(struct task_struct *child, long request,
> case PTRACE_SETSIGMASK: {
> sigset_t new_set;
>
> + /* A user worker only ever takes SIGKILL and SIGSTOP. */
> + if (child->flags & PF_USER_WORKER) {
> + ret = -EPERM;
> + break;
> + }
Acked-by: Oleg Nesterov <oleg@redhat.com>
next prev parent reply other threads:[~2026-09-21 14:14 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-21 13:44 [PATCH v3 00/17] coredump & signals: an impossible affair Christian Brauner
2026-09-21 13:44 ` [PATCH v3 01/17] coredump: hold RCU while releasing parked threads Christian Brauner
2026-09-21 13:44 ` [PATCH v3 02/17] signal: only SIGKILL and the freezers interrupt a coredumping task Christian Brauner
2026-09-22 12:55 ` Oleg Nesterov
2026-09-22 14:33 ` Christian Brauner
2026-09-21 13:44 ` [PATCH v3 03/17] coredump: parse a snapshot of core_pattern Christian Brauner
2026-09-21 13:44 ` [PATCH v3 04/17] io-wq: order the exit bit against worker creation task work Christian Brauner
2026-09-21 13:44 ` [PATCH v3 05/17] signal: don't retarget shared signals in a dying thread group Christian Brauner
2026-09-21 13:44 ` [PATCH v3 06/17] selftests/coredump: test shared signal retargeting during a dump Christian Brauner
2026-09-21 13:44 ` [PATCH v3 07/17] fork: release the files of a failed fork after sched_cancel_fork() Christian Brauner
2026-09-21 13:44 ` [PATCH v3 08/17] exit: hang up the tty before closing the files Christian Brauner
2026-09-24 12:10 ` Oleg Nesterov
2026-09-21 13:44 ` [PATCH v3 09/17] ptrace: refuse to change the signal mask of a user worker Christian Brauner
2026-09-21 14:14 ` Oleg Nesterov [this message]
2026-09-21 13:44 ` [PATCH v3 10/17] selftests/coredump: test a user worker as the coredumping thread Christian Brauner
2026-09-21 13:45 ` [PATCH v3 11/17] selftests/coredump: expect PTRACE_SETSIGMASK to be refused on a user worker Christian Brauner
2026-09-21 13:45 ` [PATCH v3 12/17] exec: cancel io_uring requests before de_thread() Christian Brauner
2026-09-21 14:14 ` Oleg Nesterov
2026-09-24 14:19 ` Jens Axboe
2026-09-21 13:45 ` [PATCH v3 13/17] fork: move the coredump and exec checks into create_io_thread() Christian Brauner
2026-09-21 14:15 ` Oleg Nesterov
2026-09-21 13:45 ` [PATCH v3 14/17] fork: don't create io threads once PF_POSTCOREDUMP is set Christian Brauner
2026-09-21 14:26 ` Oleg Nesterov
2026-09-21 13:45 ` [PATCH v3 15/17] fork: use SIG_KERNEL_ONLY_MASK for the user worker signal mask Christian Brauner
2026-09-21 14:29 ` Oleg Nesterov
2026-09-21 13:45 ` [PATCH v3 16/17] signal: enforce the user worker signal mask in __set_task_blocked() Christian Brauner
2026-09-21 16:16 ` Oleg Nesterov
2026-09-21 20:05 ` Christian Brauner
2026-09-21 13:45 ` [PATCH v3 17/17] fs: close files from the highest descriptor down Christian Brauner
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