sysctl: Correct error return from get_subdir

When insert_header fails ensure we return the proper error value
from get_subdir.  In practice nothing cares, but there is no
need to be sloppy.

Reported-by: Lucian Adrian Grijincu <lucian.grijincu@gmail.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index ebe8b3076db7..722ec116208d 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -869,6 +869,7 @@ static struct ctl_dir *get_subdir(struct ctl_dir *dir,
 {
         struct ctl_table_set *set = dir->header.set;
         struct ctl_dir *subdir, *new = NULL;
+        int err;
 
         spin_lock(&sysctl_lock);
         subdir = find_subdir(dir, name, namelen);
@@ -890,7 +891,9 @@ static struct ctl_dir *get_subdir(struct ctl_dir *dir,
         if (PTR_ERR(subdir) != -ENOENT)
                 goto failed;
 
-        if (insert_header(dir, &new->header))
+        err = insert_header(dir, &new->header);
+        subdir = ERR_PTR(err);
+        if (err)
                 goto failed;
         subdir = new;
 found: