The patch titled
cgroups: use task_lock() for access tsk->cgroups safe in cgroup_clone()
has been added to the -mm tree. Its filename is
cgroups-use-task_lock-for-access-tsk-cgroups-safe-in-cgroup_clone.patch
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------------------------------------------------------
Subject: cgroups: use task_lock() for access tsk->cgroups safe in cgroup_clone()
From: Lai Jiangshan <laijs@xxxxxxxxxxxxxx>
Use task_lock() protect tsk->cgroups and get_css_set(tsk->cgroups).
Signed-off-by: Lai Jiangshan <laijs@xxxxxxxxxxxxxx>
Acked-by: Paul Menage <menage@xxxxxxxxxx>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Cc: Pavel Emelyanov <xemul@xxxxxxxxxx>
Cc: Balbir Singh <balbir@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/cgroup.c | 2 ++
1 file changed, 2 insertions(+)
diff -puN kernel/cgroup.c~cgroups-use-task_lock-for-access-tsk-cgroups-safe-in-cgroup_clone kernel/cgroup.c
--- a/kernel/cgroup.c~cgroups-use-task_lock-for-access-tsk-cgroups-safe-in-cgroup_clone
+++ a/kernel/cgroup.c
@@ -2906,6 +2906,7 @@ int cgroup_clone(struct task_struct *tsk
mutex_unlock(&cgroup_mutex);
return 0;
}
+ task_lock(tsk);
cg = tsk->cgroups;
parent = task_cgroup(tsk, subsys->subsys_id);
@@ -2914,6 +2915,7 @@ int cgroup_clone(struct task_struct *tsk
/* Keep the cgroup alive */
get_css_set(cg);
+ task_unlock(tsk);
mutex_unlock(&cgroup_mutex);
/* Now do the VFS work to create a cgroup */
_
Patches currently in -mm which might be from laijs@xxxxxxxxxxxxxx are
origin.patch
linux-next.patch
kprobes-bugfix-try_module_get-even-if-calling_mod-is-null.patch
cgroups-add-lock-for-child-cgroups-in-cgroup_post_fork.patch
cgroups-fix-cgroup_iter_next-bug.patch
cgroups-dont-put-struct-cgroupfs_root-protected-by-rcu.patch
cgroups-use-task_lock-for-access-tsk-cgroups-safe-in-cgroup_clone.patch
cgroups-call-find_css_set-safely-in-cgroup_attach_task.patch
devcgroup-use-list_for_each_entry_rcu.patch
memcontrol-rcu_read_lock-to-protect-mm_match_cgroup.patch
cpuset-rcu_read_lock-to-protect-task_cs.patch
cpuset-rcu_read_lock-to-protect-task_cs-even-we-dont-dereference-to-task_css-return-value.patch
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