From: Tiwei Bie <tiwei.btw@antgroup.com>
Date: Thu, 24 Oct 2024 14:28:26 +0000 (+0800)
Subject: um: Set parent-death signal for ubd io thread/process
X-Git-Tag: v6.13-rc1~18^2~21
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=9b5e6c0f5a9199c69af81ac5bedc512ee7dc20b3;p=thirdparty%2Fkernel%2Flinux.git

um: Set parent-death signal for ubd io thread/process

The ubd io thread is not really a traditional thread. Set the
parent-death signal for it to ensure that it will be killed if
the UML kernel dies unexpectedly without proper cleanup.

Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
Link: https://patch.msgid.link/20241024142828.2612828-3-tiwei.btw@antgroup.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---

diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
index 7f28ec1929dc0..2b8d04e67600a 100644
--- a/arch/um/drivers/ubd_kern.c
+++ b/arch/um/drivers/ubd_kern.c
@@ -1499,6 +1499,7 @@ int io_thread(void *arg)
 {
 	int n, count, written, res;
 
+	os_set_pdeathsig();
 	os_fix_helper_signals();
 
 	while(1){