release 6.15.3

debian/patches/patchset-pf/fixes/0044-cgroup-freezer-fix-incomplete-freezing-when-attachin.patch

@@ -0,0 +1,64 @@
+From 6e492900893c011cbe13fbb881cf1e11df08982b Mon Sep 17 00:00:00 2001
+From: Chen Ridong <chenridong@huawei.com>
+Date: Wed, 18 Jun 2025 07:32:17 +0000
+Subject: cgroup,freezer: fix incomplete freezing when attaching tasks
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+An issue was found:
+
+	# cd /sys/fs/cgroup/freezer/
+	# mkdir test
+	# echo FROZEN > test/freezer.state
+	# cat test/freezer.state
+	FROZEN
+	# sleep 1000 &
+	[1] 863
+	# echo 863 > test/cgroup.procs
+	# cat test/freezer.state
+	FREEZING
+
+When tasks are migrated to a frozen cgroup, the freezer fails to
+immediately freeze the tasks, causing the cgroup to remain in the
+"FREEZING".
+
+The freeze_task() function is called before clearing the CGROUP_FROZEN
+flag. This causes the freezing() check to incorrectly return false,
+preventing __freeze_task() from being invoked for the migrated task.
+
+To fix this issue, clear the CGROUP_FROZEN state before calling
+freeze_task().
+
+Fixes: f5d39b020809 ("freezer,sched: Rewrite core freezer logic")
+Cc: stable@vger.kernel.org # v6.1+
+Reported-by: Zhong Jiawei <zhongjiawei1@huawei.com>
+Signed-off-by: Chen Ridong <chenridong@huawei.com>
+Acked-by: Michal Koutný <mkoutny@suse.com>
+Signed-off-by: Tejun Heo <tj@kernel.org>
+---
+ kernel/cgroup/legacy_freezer.c | 3 +--
+ 1 file changed, 1 insertion(+), 2 deletions(-)
+
+diff --git a/kernel/cgroup/legacy_freezer.c b/kernel/cgroup/legacy_freezer.c
+index 039d1eb2f215..507b8f19a262 100644
+--- a/kernel/cgroup/legacy_freezer.c
++++ b/kernel/cgroup/legacy_freezer.c
+@@ -188,13 +188,12 @@ static void freezer_attach(struct cgroup_taskset *tset)
+ 		if (!(freezer->state & CGROUP_FREEZING)) {
+ 			__thaw_task(task);
+ 		} else {
+-			freeze_task(task);
+-
+ 			/* clear FROZEN and propagate upwards */
+ 			while (freezer && (freezer->state & CGROUP_FROZEN)) {
+ 				freezer->state &= ~CGROUP_FROZEN;
+ 				freezer = parent_freezer(freezer);
+ 			}
++			freeze_task(task);
+ 		}
+ 	}
+ 
+-- 
+2.50.0
+