From: Al Viro <viro@zeniv.linux.org.uk>
Date: Mon, 18 Dec 2017 20:05:07 +0000 (-0500)
Subject: sget(): handle failures of register_shrinker()
X-Git-Tag: v4.15-rc7~5^2~1
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=9ee332d99e4d5a97548943b81c54668450ce641b;p=users%2Fjedix%2Flinux-maple.git

sget(): handle failures of register_shrinker()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/fs/super.c b/fs/super.c
index 7ff1349609e4..06bd25d90ba5 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -517,7 +517,11 @@ retry:
 	hlist_add_head(&s->s_instances, &type->fs_supers);
 	spin_unlock(&sb_lock);
 	get_filesystem(type);
-	register_shrinker(&s->s_shrink);
+	err = register_shrinker(&s->s_shrink);
+	if (err) {
+		deactivate_locked_super(s);
+		s = ERR_PTR(err);
+	}
 	return s;
 }