diff options
Diffstat (limited to 'kernel/cgroup/cgroup.c')
| -rw-r--r-- | kernel/cgroup/cgroup.c | 25 |
1 files changed, 9 insertions, 16 deletions
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c index 5886b95c6eae..9bc4a84bd309 100644 --- a/kernel/cgroup/cgroup.c +++ b/kernel/cgroup/cgroup.c @@ -5789,7 +5789,7 @@ static bool cgroup_check_hierarchy_limits(struct cgroup *parent) { struct cgroup *cgroup; int ret = false; - int level = 1; + int level = 0; lockdep_assert_held(&cgroup_mutex); @@ -5797,7 +5797,7 @@ static bool cgroup_check_hierarchy_limits(struct cgroup *parent) if (cgroup->nr_descendants >= cgroup->max_descendants) goto fail; - if (level > cgroup->max_depth) + if (level >= cgroup->max_depth) goto fail; level++; @@ -6476,7 +6476,6 @@ static int cgroup_css_set_fork(struct kernel_clone_args *kargs) struct cgroup *dst_cgrp = NULL; struct css_set *cset; struct super_block *sb; - struct file *f; if (kargs->flags & CLONE_INTO_CGROUP) cgroup_lock(); @@ -6493,14 +6492,14 @@ static int cgroup_css_set_fork(struct kernel_clone_args *kargs) return 0; } - f = fget_raw(kargs->cgroup); - if (!f) { + CLASS(fd_raw, f)(kargs->cgroup); + if (fd_empty(f)) { ret = -EBADF; goto err; } - sb = f->f_path.dentry->d_sb; + sb = fd_file(f)->f_path.dentry->d_sb; - dst_cgrp = cgroup_get_from_file(f); + dst_cgrp = cgroup_get_from_file(fd_file(f)); if (IS_ERR(dst_cgrp)) { ret = PTR_ERR(dst_cgrp); dst_cgrp = NULL; @@ -6548,15 +6547,12 @@ static int cgroup_css_set_fork(struct kernel_clone_args *kargs) } put_css_set(cset); - fput(f); kargs->cgrp = dst_cgrp; return ret; err: cgroup_threadgroup_change_end(current); cgroup_unlock(); - if (f) - fput(f); if (dst_cgrp) cgroup_put(dst_cgrp); put_css_set(cset); @@ -6966,14 +6962,11 @@ EXPORT_SYMBOL_GPL(cgroup_get_from_path); */ struct cgroup *cgroup_v1v2_get_from_fd(int fd) { - struct cgroup *cgrp; - struct fd f = fdget_raw(fd); - if (!fd_file(f)) + CLASS(fd_raw, f)(fd); + if (fd_empty(f)) return ERR_PTR(-EBADF); - cgrp = cgroup_v1v2_get_from_file(fd_file(f)); - fdput(f); - return cgrp; + return cgroup_v1v2_get_from_file(fd_file(f)); } /** |