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fork: use SIG_KERNEL_ONLY_MASK for the user worker signal mask

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For a user worker copy_process() blocks every signal except for SIGKILL
and SIGSTOP. Use SIG_KERNEL_ONLY_MASK instead of open-coding it.

No functional changes.

Link: https://patch.msgid.link/20260921-work-coredump-fixes-v3-15-8e4adb1619e6@kernel.org
Acked-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
This commit is contained in:
Christian Brauner 2026-09-21 15:45:04 +02:00
parent 1f978881ce
commit c7de3d02e6
1 changed files with 2 additions and 5 deletions
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7
kernel/fork.c
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@ -2140,12 +2140,9 @@ __latent_entropy struct task_struct *copy_process(
if (args->kthread)
p->flags |= PF_KTHREAD;
if (args->user_worker) {
/*
* Mark us a user worker, and block any signal that isn't
* fatal or STOP
*/
/* A user worker takes only the signals nobody can block. */
p->flags |= PF_USER_WORKER;
siginitsetinv(&p->blocked, sigmask(SIGKILL)|sigmask(SIGSTOP));
siginitsetinv(&p->blocked, SIG_KERNEL_ONLY_MASK);
}
if (args->io_thread)
p->flags |= PF_IO_WORKER;