diff --git a/backport-udevd-don-t-kill-worker-in-manager_kill_workers-when.patch b/backport-udevd-don-t-kill-worker-in-manager_kill_workers-when.patch
new file mode 100644
index 0000000000000000000000000000000000000000..518e8704f1c0d67ad919b2dae9467563bdb1a38b
--- /dev/null
+++ b/backport-udevd-don-t-kill-worker-in-manager_kill_workers-when.patch
@@ -0,0 +1,104 @@
+From f257a8fc13b2a617d845132eb61aefde47921198 Mon Sep 17 00:00:00 2001
+From: gaoyi <ymuemc@163.com>
+Date: Fri, 19 Mar 2021 15:16:56 +0800
+Subject: [PATCH] udevd: don't kill worker in manager_kill_workers when it's
+ running
+
+If worker is running, kill worker may lead uevent unprocessed.
+---
+ src/udev/udevd.c | 23 ++++++++++++++++-------
+ 1 file changed, 16 insertions(+), 7 deletions(-)
+
+diff --git a/src/udev/udevd.c b/src/udev/udevd.c
+index cb51230..215f020 100644
+--- a/src/udev/udevd.c
++++ b/src/udev/udevd.c
+@@ -134,6 +134,7 @@ enum worker_state {
+         WORKER_RUNNING,
+         WORKER_IDLE,
+         WORKER_KILLED,
++        WORKER_KILLING,
+ };
+ 
+ struct worker {
+@@ -654,7 +655,7 @@ static int event_queue_insert(Manager *manager, sd_device *dev) {
+         return 0;
+ }
+ 
+-static void manager_kill_workers(Manager *manager) {
++static void manager_kill_workers(Manager *manager, bool force) {
+         struct worker *worker;
+         Iterator i;
+ 
+@@ -664,6 +665,11 @@ static void manager_kill_workers(Manager *manager) {
+                 if (worker->state == WORKER_KILLED)
+                         continue;
+ 
++                if (worker->state == WORKER_RUNNING && !force) {
++                        worker->state = WORKER_KILLING;
++                        continue;
++                }
++
+                 worker->state = WORKER_KILLED;
+                 (void) kill(worker->pid, SIGTERM);
+         }
+@@ -810,7 +816,7 @@ static void manager_exit(Manager *manager) {
+ 
+         /* discard queued events and kill workers */
+         event_queue_cleanup(manager, EVENT_QUEUED);
+-        manager_kill_workers(manager);
++        manager_kill_workers(manager, true);
+ 
+         assert_se(sd_event_now(manager->event, CLOCK_MONOTONIC, &usec) >= 0);
+ 
+@@ -829,7 +835,7 @@ static void manager_reload(Manager *manager) {
+                   "RELOADING=1\n"
+                   "STATUS=Flushing configuration...");
+ 
+-        manager_kill_workers(manager);
++        manager_kill_workers(manager, false);
+         manager->rules = udev_rules_free(manager->rules);
+         udev_builtin_exit();
+ 
+@@ -844,7 +850,7 @@ static int on_kill_workers_event(sd_event_source *s, uint64_t usec, void *userda
+         assert(manager);
+ 
+         log_debug("Cleanup idle workers");
+-        manager_kill_workers(manager);
++        manager_kill_workers(manager, false);
+ 
+         return 1;
+ }
+@@ -966,7 +972,10 @@ static int on_worker(sd_event_source *s, int fd, uint32_t revents, void *userdat
+                         continue;
+                 }
+ 
+-                if (worker->state != WORKER_KILLED)
++                if (worker->state == WORKER_KILLING) {
++                        worker->state = WORKER_KILLED;
++                        (void) kill(worker->pid, SIGTERM);
++                } else if (worker->state != WORKER_KILLED)
+                         worker->state = WORKER_IDLE;
+ 
+                 /* worker returned */
+@@ -1012,7 +1021,7 @@ static int on_ctrl_msg(struct udev_ctrl *uctrl, enum udev_ctrl_msg_type type, co
+                 log_debug("Received udev control message (SET_LOG_LEVEL), setting log_priority=%i", value->intval);
+                 log_set_max_level_realm(LOG_REALM_UDEV, value->intval);
+                 log_set_max_level_realm(LOG_REALM_SYSTEMD, value->intval);
+-                manager_kill_workers(manager);
++                manager_kill_workers(manager, false);
+                 break;
+         case UDEV_CTRL_STOP_EXEC_QUEUE:
+                 log_debug("Received udev control message (STOP_EXEC_QUEUE)");
+@@ -1077,7 +1086,7 @@ static int on_ctrl_msg(struct udev_ctrl *uctrl, enum udev_ctrl_msg_type type, co
+                 }
+ 
+                 key = val = NULL;
+-                manager_kill_workers(manager);
++                manager_kill_workers(manager, false);
+                 break;
+         }
+         case UDEV_CTRL_SET_CHILDREN_MAX:
+-- 
+1.8.3.1
+
diff --git a/systemd.spec b/systemd.spec
index a66955f5b8c772efaa9584731e9949f7eab3c920..630d2c53f37bad84ffb02a0e6fcd751dcc35cf76 100644
--- a/systemd.spec
+++ b/systemd.spec
@@ -16,7 +16,7 @@
 Name:           systemd
 Url:            https://www.freedesktop.org/wiki/Software/systemd
 Version:        243
-Release:        41
+Release:        42
 License:        MIT and LGPLv2+ and GPLv2+
 Summary:        System and Service Manager
 
@@ -132,6 +132,7 @@ Patch0084:      0084-journald-enforce-longer-line-length-limit-during-set.patch
 Patch0085:      backport-execute-Fix-migration-from-DynamicUser-yes-to-no.patch
 Patch0086:      0086-fix-CVE-2021-33910.patch
 Patch0087:      backport-units-restore-RemainAfterExit-yes-in-systemd-vconsol.patch
+Patch0088:      backport-udevd-don-t-kill-worker-in-manager_kill_workers-when.patch
 
 #openEuler
 Patch9002:      1509-fix-journal-file-descriptors-leak-problems.patch
@@ -1518,6 +1519,12 @@ fi
 %exclude /usr/share/man/man3/*
 
 %changelog
+* Mon Aug 02 2021 fangxiuning <fangxiuning@huawei.com> - 243-42
+- Type:bugfix
+- ID:NA
+- SUG:NA
+- DESC:udevd: don't kill worker in manager_kill_worker when it's running
+
 * Mon Aug 02 2021 jiazhenyuan <jiazhenyuan@uniontech.com> - 243-41
 - set kernel.core_pipe_limit=16