From: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
Subject: kthread: fix return value of kthread_create() upon SIGKILL.
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@xxxxxxxxxxxxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Acked-by: David Rientjes <rientjes@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> [3.13+]
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/kthread.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff -puN kernel/kthread.c~kthread-fix-return-value-of-kthread_create-upon-sigkill kernel/kthread.c
--- a/kernel/kthread.c~kthread-fix-return-value-of-kthread_create-upon-sigkill
+++ a/kernel/kthread.c
@@ -262,7 +262,7 @@ static void create_kthread(struct kthrea
* 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_no
* that thread.
*/
if (xchg(&create->done, NULL))
- return ERR_PTR(-ENOMEM);
+ return ERR_PTR(-EINTR);
/*
* kthreadd (or new kernel thread) will call complete()
* shortly.
_
--
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