efivarfs: efivarfs_create() ensure we drop our reference on inode on error
Signed-off-by: Andy Whitcroft <apw@canonical.com>
Acked-by: Matthew Garrett <mjg@redhat.com>
Acked-by: Jeremy Kerr <jeremy.kerr@canonical.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
diff --git a/drivers/firmware/efivars.c b/drivers/firmware/efivars.c
index b7c9a32..6e5f367 100644
--- a/drivers/firmware/efivars.c
+++ b/drivers/firmware/efivars.c
@@ -866,7 +866,7 @@
static int efivarfs_create(struct inode *dir, struct dentry *dentry,
umode_t mode, bool excl)
{
- struct inode *inode = efivarfs_get_inode(dir->i_sb, dir, mode, 0);
+ struct inode *inode;
struct efivars *efivars = &__efivars;
struct efivar_entry *var;
int namelen, i = 0, err = 0;
@@ -874,13 +874,15 @@
if (dentry->d_name.len < 38)
return -EINVAL;
+ inode = efivarfs_get_inode(dir->i_sb, dir, mode, 0);
if (!inode)
return -ENOSPC;
var = kzalloc(sizeof(struct efivar_entry), GFP_KERNEL);
-
- if (!var)
- return -ENOMEM;
+ if (!var) {
+ err = -ENOMEM;
+ goto out;
+ }
namelen = dentry->d_name.len - GUID_LEN;
@@ -908,8 +910,10 @@
d_instantiate(dentry, inode);
dget(dentry);
out:
- if (err)
+ if (err) {
kfree(var);
+ iput(inode);
+ }
return err;
}