Sorry, I noticed number of stack entry is poe->numlower in previous version,
so I must be missing redirect related thing here, please just drop the patch.
> 在 2018年4月11日，上午11:42，Chengguang Xu <cgxu519@xxxxxxx> 写道：
>
> In ovl_lookup, the number of lowerstack entry is no bigger
> than poe->numlower, so adjust memory allocation size for stack.
>
> Signed-off-by: Chengguang Xu <cgxu519@xxxxxxx>
> ---
> fs/overlayfs/namei.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/overlayfs/namei.c b/fs/overlayfs/namei.c
> index 2dba29e..81dbc3f 100644
> --- a/fs/overlayfs/namei.c
> +++ b/fs/overlayfs/namei.c
> @@ -888,7 +888,7 @@ struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry,
>
> if (!d.stop && poe->numlower) {
> err = -ENOMEM;
> - stack = kcalloc(ofs->numlower, sizeof(struct ovl_path),
> + stack = kcalloc(poe->numlower, sizeof(struct ovl_path),
> GFP_KERNEL);
> if (!stack)
> goto out_put_upper;
> --
> 1.8.3.1
>
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