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Date: Fri, 3 Aug 2018 16:40:20 +0200 From: Jürg Billeter <j@...ron.ch> To: Andrew Morton <akpm@...ux-foundation.org> Cc: Oleg Nesterov <oleg@...hat.com>, Thomas Gleixner <tglx@...utronix.de>, Eric Biederman <ebiederm@...ssion.com>, linux-api@...r.kernel.org, linux-kernel@...r.kernel.org, Jürg Billeter <j@...ron.ch> Subject: [PATCH v3 1/2] fork: do not rely on SIGNAL_UNKILLABLE for init check copy_process() currently checks the SIGNAL_UNKILLABLE flag to determine whether to accept CLONE_PARENT. In preparation for allowing init processes to opt out of SIGNAL_UNKILLABLE, directly check whether the process is an init process with is_child_reaper(). Signed-off-by: Jürg Billeter <j@...ron.ch> --- kernel/fork.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/fork.c b/kernel/fork.c index 1b27babc4c78..c019ce461556 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1646,7 +1646,7 @@ static __latent_entropy struct task_struct *copy_process( * from creating siblings. */ if ((clone_flags & CLONE_PARENT) && - current->signal->flags & SIGNAL_UNKILLABLE) + is_child_reaper(task_tgid(current))) return ERR_PTR(-EINVAL); /* -- 2.18.0
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