From: Al Viro <viro@zeniv.linux.org.uk>
Date: Tue, 3 Apr 2018 04:22:29 +0000 (-0400)
Subject: kernfs: deal with kernfs_fill_super() failures
X-Git-Tag: v4.17-rc7~24^2~5
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=82382acec0c97b91830fff7130d0acce4ac4f3f3;p=thirdparty%2Fkernel%2Flinux.git

kernfs: deal with kernfs_fill_super() failures

make sure that info->node is initialized early, so that kernfs_kill_sb()
can list_del() it safely.

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

diff --git a/fs/kernfs/mount.c b/fs/kernfs/mount.c
index 26dd9a50f3838..ff2716f9322e6 100644
--- a/fs/kernfs/mount.c
+++ b/fs/kernfs/mount.c
@@ -316,6 +316,7 @@ struct dentry *kernfs_mount_ns(struct file_system_type *fs_type, int flags,
 
 	info->root = root;
 	info->ns = ns;
+	INIT_LIST_HEAD(&info->node);
 
 	sb = sget_userns(fs_type, kernfs_test_super, kernfs_set_super, flags,
 			 &init_user_ns, info);