From 094717586bf71ac20ae3b240d2654d826634b21e Mon Sep 17 00:00:00 2001 From: Mike Christie Date: Fri, 10 Mar 2023 16:03:28 -0600 Subject: [PATCH] fork: Add kernel_clone_args flag to ignore signals Since: commit 10ab825bdef8 ("change kernel threads to ignore signals instead of blocking them") kthreads have been ignoring signals by default, and the vhost layer has never had a need to change that. This patch adds an option flag, USER_WORKER_SIG_IGN, handled in copy_process() after copy_sighand() and copy_signals() so vhost_tasks added in the next patches can continue to ignore singals. Signed-off-by: Christian Brauner Signed-off-by: Mike Christie Acked-by: Michael S. Tsirkin Reviewed-by: Christoph Hellwig Signed-off-by: Christian Brauner (Microsoft) --- include/linux/sched/task.h | 1 + kernel/fork.c | 3 +++ 2 files changed, 4 insertions(+) diff --git a/include/linux/sched/task.h b/include/linux/sched/task.h index 4f816048794fb..00c54bfac0b56 100644 --- a/include/linux/sched/task.h +++ b/include/linux/sched/task.h @@ -29,6 +29,7 @@ struct kernel_clone_args { u32 io_thread:1; u32 user_worker:1; u32 no_files:1; + u32 ignore_signals:1; unsigned long stack; unsigned long stack_size; unsigned long tls; diff --git a/kernel/fork.c b/kernel/fork.c index f8d530f4406e8..2918c685ede5c 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -2290,6 +2290,9 @@ static __latent_entropy struct task_struct *copy_process( if (retval) goto bad_fork_cleanup_io; + if (args->ignore_signals) + ignore_signals(p); + stackleak_task_init(p); if (pid != &init_struct_pid) { -- 2.30.2