Waiman Long 3cff144cb3 cgroup: Protect css->cgroup write under css_set_lock ... [ Upstream commit 57b56d16800e8961278ecff0dc755d46c4575092 ] The writing of css->cgroup associated with the cgroup root in rebind_subsystems() is currently protected only by cgroup_mutex. However, the reading of css->cgroup in both proc_cpuset_show() and proc_cgroup_show() is protected just by css_set_lock. That makes the readers susceptible to racing problems like data tearing or caching. It is also a problem that can be reported by KCSAN. This can be fixed by using READ_ONCE() and WRITE_ONCE() to access css->cgroup. Alternatively, the writing of css->cgroup can be moved under css_set_lock as well which is done by this patch. Signed-off-by: Waiman Long <longman@redhat.com> Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-09-12 11:10:22 +02:00
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cgroup-internal.h	cgroup: Make operations on the cgroup root_list RCU safe	2024-08-19 06:00:06 +02:00
cgroup-v1.c	kernfs: Convert kernfs_path_from_node_locked() from strlcpy() to strscpy()	2024-08-03 08:48:54 +02:00
cgroup.c	cgroup: Protect css->cgroup write under css_set_lock	2024-09-12 11:10:22 +02:00
cpuset.c	cgroup/cpuset: Prevent UAF in proc_cpuset_show()	2024-08-03 08:48:54 +02:00
debug.c
freezer.c
legacy_freezer.c
Makefile
misc.c
namespace.c
pids.c
rdma.c	cgroup: fix spelling mistakes	2021-05-24 12:45:26 -04:00
rstat.c