[PATCH] ovl: fix return value of ovl_fill_super

[Geliang Tang]

If kcalloc() failed, the return value of ovl_fill_super() is -EINVAL,
not -ENOMEM. So this patch sets this value to -ENOMEM before calling
kcalloc(), and sets it back to -EINVAL after calling kcalloc().

Signed-off-by: Geliang Tang <geliangt...@gmail.com>
---
 fs/overlayfs/super.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index 19d31ce..1afdf77 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -754,10 +754,12 @@ static int ovl_fill_super(struct super_block *sb, void 
*data, int silent)
                goto out_free_lowertmp;
        }
 
+       err = -ENOMEM;
        stack = kcalloc(stacklen, sizeof(struct path), GFP_KERNEL);
        if (!stack)
                goto out_free_lowertmp;
 
+       err = -EINVAL;
        lower = lowertmp;
        for (numlower = 0; numlower < stacklen; numlower++) {
                err = ovl_lower_dir(lower, &stack[numlower], ufs,
-- 
2.9.3