Message ID | 201406032203.ECD00030.OOHFSQtVFLOFMJ@I-love.SAKURA.ne.jp |
---|---|
State | New |
Headers | show |
On Tue, 3 Jun 2014, Tetsuo Handa wrote: > >From c41fa0b9294900a86167d6c8db392d99dde09774 Mon Sep 17 00:00:00 2001 > From: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> > Date: Tue, 3 Jun 2014 21:46:24 +0900 > Subject: [PATCH] kthread: Fix return value of kthread_create() upon SIGKILL. > > Commit 786235eeb "kthread: make kthread_create() killable" meant for > allowing kthread_create() to abort as soon as killed by the OOM-killer. > But returning -ENOMEM is wrong if killed by SIGKILL from userspace. > Change kthread_create() to return -EINTR upon SIGKILL. > > Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> > Cc: Oleg Nesterov <oleg@redhat.com> > Cc: David Rientjes <rientjes@google.com> > Cc: stable <stable@kernel.org> [3.13+] Acked-by: David Rientjes <rientjes@google.com>
diff --git a/kernel/kthread.c b/kernel/kthread.c index 9a130ec..c2390f4 100644 --- a/kernel/kthread.c +++ b/kernel/kthread.c @@ -262,7 +262,7 @@ static void create_kthread(struct kthread_create_info *create) * kthread_stop() has been called). The return value should be zero * or a negative error number; it will be passed to kthread_stop(). * - * Returns a task_struct or ERR_PTR(-ENOMEM). + * Returns a task_struct or ERR_PTR(-ENOMEM) or ERR_PTR(-EINTR). */ struct task_struct *kthread_create_on_node(int (*threadfn)(void *data), void *data, int node, @@ -298,7 +298,7 @@ struct task_struct *kthread_create_on_node(int (*threadfn)(void *data), * that thread. */ if (xchg(&create->done, NULL)) - return ERR_PTR(-ENOMEM); + return ERR_PTR(-EINTR); /* * kthreadd (or new kernel thread) will call complete() * shortly.