copy_process examines arguments in kernel_clone_args to see if
PF_IO_WORKER need to be set, so the flag should not inherit from
parent process.

Signed-off-by: Haifeng Xu <haifeng.xu@shopee.com>
---
 kernel/fork.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/fork.c b/kernel/fork.c
index 947eb1a6399a..50498e5d10dd 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -2088,6 +2088,7 @@ static __latent_entropy struct task_struct *copy_process(
 	p->flags &= ~PF_KTHREAD;
 	if (args->kthread)
 		p->flags |= PF_KTHREAD;
+	p->flags &= ~PF_IO_WORKER;
 	if (args->io_thread) {
 		/*
 		 * Mark us an IO worker, and block any signal that isn't
-- 
2.25.1