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| author | Kirill Tkhai <ktkhai@virtuozzo.com> | 2018-08-02 15:36:01 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-08-02 16:03:40 -0700 |
| commit | 7e97de0b033bcac4fa9a35cef72e0c06e6a22c67 (patch) | |
| tree | 7c0d969f5f2e12e34e4f53a94f42bcba82a4ceed /ipc/shm.c | |
| parent | e30cb13c5a09ff5f043a6570c32e49b063bea6a1 (diff) | |
| download | linux-rpi-7e97de0b033bcac4fa9a35cef72e0c06e6a22c67.tar.gz linux-rpi-7e97de0b033bcac4fa9a35cef72e0c06e6a22c67.tar.bz2 linux-rpi-7e97de0b033bcac4fa9a35cef72e0c06e6a22c67.zip | |
memcg: remove memcg_cgroup::id from IDR on mem_cgroup_css_alloc() failure
In case of memcg_online_kmem() failure, memcg_cgroup::id remains hashed
in mem_cgroup_idr even after memcg memory is freed. This leads to leak
of ID in mem_cgroup_idr.
This patch adds removal into mem_cgroup_css_alloc(), which fixes the
problem. For better readability, it adds a generic helper which is used
in mem_cgroup_alloc() and mem_cgroup_id_put_many() as well.
Link: http://lkml.kernel.org/r/152354470916.22460.14397070748001974638.stgit@localhost.localdomain
Fixes 73f576c04b94 ("mm: memcontrol: fix cgroup creation failure after many small jobs")
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: Michal Hocko <mhocko@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'ipc/shm.c')
0 files changed, 0 insertions, 0 deletions