I guess you didn't notice this comment ? :) >> --- a/kernel/fork.c >> > +++ b/kernel/fork.c >> > @@ -54,6 +54,7 @@ >> > #include <linux/tty.h> >> > #include <linux/proc_fs.h> >> > #include <linux/blkdev.h> >> > +#include <linux/cgroup_task.h> >> > >> > #include <asm/pgtable.h> >> > #include <asm/pgalloc.h> >> > @@ -920,6 +921,8 @@ static struct task_struct *copy_process( >> > p->user != current->nsproxy->user_ns->root_user) >> > goto bad_fork_free; >> > } >> > + if (task_cgroup_can_fork(p)) >> > + goto bad_fork_free; > > If task_cgroup_can_fork() returns 0, but copy_process() fails afterwords, > taskcg->nr_tasks will be in a wrong state. >
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