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| author | Zefan Li <lizefan@huawei.com> | 2017-04-19 10:15:59 +0800 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2017-04-28 18:04:54 -0400 |
| commit | 9732adc5d6520238223df16630f1f8cad2269317 (patch) | |
| tree | b10b3242df285c38a45e4b8039b2e860a9e20def /kernel/cgroup/cgroup-internal.h | |
| parent | a590b90d472f2c176c140576ee3ab44df7f67839 (diff) | |
| download | linux-9732adc5d6520238223df16630f1f8cad2269317.tar.bz2 | |
cgroup: avoid attaching a cgroup root to two different superblocks, take 2
Commit bfb0b80db5f9 ("cgroup: avoid attaching a cgroup root to two
different superblocks") is broken. Now we try to fix the race by
delaying the initialization of cgroup root refcnt until a superblock
has been allocated.
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Reported-by: Andrei Vagin <avagin@virtuozzo.com>
Tested-by: Andrei Vagin <avagin@virtuozzo.com>
Signed-off-by: Zefan Li <lizefan@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'kernel/cgroup/cgroup-internal.h')
| -rw-r--r-- | kernel/cgroup/cgroup-internal.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/cgroup/cgroup-internal.h b/kernel/cgroup/cgroup-internal.h index 4567f12b02e9..00f4d6bf048f 100644 --- a/kernel/cgroup/cgroup-internal.h +++ b/kernel/cgroup/cgroup-internal.h @@ -164,7 +164,7 @@ int cgroup_path_ns_locked(struct cgroup *cgrp, char *buf, size_t buflen, void cgroup_free_root(struct cgroup_root *root); void init_cgroup_root(struct cgroup_root *root, struct cgroup_sb_opts *opts); -int cgroup_setup_root(struct cgroup_root *root, u16 ss_mask); +int cgroup_setup_root(struct cgroup_root *root, u16 ss_mask, int ref_flags); int rebind_subsystems(struct cgroup_root *dst_root, u16 ss_mask); struct dentry *cgroup_do_mount(struct file_system_type *fs_type, int flags, struct cgroup_root *root, unsigned long magic, |