Waiman Long 84a6b76b28 cgroup: Protect css->cgroup write under css_set_lock ... [ Upstream commit 57b56d1680 ] 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 11:11:35 +02:00
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Makefile	cgroup: Add misc cgroup controller	2021-04-04 13:34:46 -04:00
cgroup-internal.h	cgroup: Make operations on the cgroup root_list RCU safe	2024-08-19 06:04:25 +02:00
cgroup-v1.c	kernfs: Convert kernfs_path_from_node_locked() from strlcpy() to strscpy()	2024-08-03 08:53:21 +02:00
cgroup.c	cgroup: Protect css->cgroup write under css_set_lock	2024-09-12 11:11:35 +02:00
cpuset.c	cgroup/cpuset: Prevent UAF in proc_cpuset_show()	2024-08-03 08:53:22 +02:00
debug.c	kernel: cgroup: fix misuse of %x	2019-05-06 08:47:48 -07:00
freezer.c	cgroup: cleanup comments	2022-03-13 19:19:27 -10:00
legacy_freezer.c	cgroup_freezer: cgroup_freezing: Check if not frozen	2023-12-13 18:45:22 +01:00
misc.c	cgroup/misc: Store atomic64_t reads to u64	2023-07-21 08:10:06 -10:00
namespace.c	cgroup:namespace: Remove unused cgroup_namespaces_init()	2023-08-14 14:29:47 -10:00
pids.c	cgroup: add pids.peak interface for pids controller	2022-09-04 09:26:51 -10:00
rdma.c	rdmacg: fix kernel-doc warnings in rdmacg	2023-06-05 09:45:14 -10:00
rstat.c	cgroup/rstat: Record the cumulative per-cpu time of cgroup and its descendants	2023-08-07 08:41:25 -10:00