I've discovered a bug in the PIDs cgroup. We aren't properly dealing
with css references (we grab a reference to a css in ->can_attach() and
then drop a reference to a *different* css in ->{cancel_,}attach(). This
is a quick patch I wrote which I believe fixes the problem by getting
cgroup_migrate() to grab a reference before ->can_attach() and once the
attach has failed or succeded.
Aleksa Sarai (2):
cgroup: get a ref to source csses when migrating
cgroup: pids: fix invalid get/put usage
kernel/cgroup.c | 21 +++++++++++++++++++--
kernel/cgroup_pids.c | 13 +------------
2 files changed, 20 insertions(+), 14 deletions(-)
--
2.5.0
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