[PATCH 2/5] efivarfs: efivarfs_create() ensure we drop our reference on inode on error

Andy Whitcroft
2012-10-11T10:32:31Z

Signed-off-by: Andy Whitcroft <apw@canonical.com>
---
drivers/firmware/efivars.c | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/firmware/efivars.c b/drivers/firmware/efivars.c
index ae50d2f..0bbf742 100644
--- a/drivers/firmware/efivars.c
+++ b/drivers/firmware/efivars.c
@@ -866,7 +866,7 @@ static void efivarfs_hex_to_guid(const char *str, efi_guid_t *guid)
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 @@ static int efivarfs_create(struct inode *dir, struct dentry *dentry,
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 @@ static int efivarfs_create(struct inode *dir, struct dentry *dentry,
d_instantiate(dentry, inode);
dget(dentry);
out:
- if (err)
+ if (err) {
kfree(var);
+ iput(inode);
+ }
return err;
}

--
1.7.9.5