efivarfs: efivarfs_fill_super() ensure we clean up correctly on error
Ensure we free both the name and inode on error when building the
individual variables.
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 36b3dd6..216086d 100644
--- a/drivers/firmware/efivars.c
+++ b/drivers/firmware/efivars.c
@@ -948,6 +948,7 @@
struct dentry *root;
struct efivar_entry *entry, *n;
struct efivars *efivars = &__efivars;
+ char *name;
efivarfs_sb = sb;
@@ -969,16 +970,18 @@
return -ENOMEM;
list_for_each_entry_safe(entry, n, &efivars->list, list) {
- struct inode *inode;
struct dentry *dentry, *root = efivarfs_sb->s_root;
- char *name;
unsigned long size = 0;
int len, i;
+ inode = NULL;
+
len = utf16_strlen(entry->var.VariableName);
/* GUID plus trailing NULL */
name = kmalloc(len + 38, GFP_ATOMIC);
+ if (!name)
+ goto fail;
for (i = 0; i < len; i++)
name[i] = entry->var.VariableName[i] & 0xFF;
@@ -991,7 +994,13 @@
inode = efivarfs_get_inode(efivarfs_sb, root->d_inode,
S_IFREG | 0644, 0);
+ if (!inode)
+ goto fail_name;
+
dentry = d_alloc_name(root, name);
+ if (!dentry)
+ goto fail_inode;
+
/* copied by the above to local storage in the dentry. */
kfree(name);
@@ -1009,6 +1018,13 @@
}
return 0;
+
+fail_inode:
+ iput(inode);
+fail_name:
+ kfree(name);
+fail:
+ return -ENOMEM;
}
static struct dentry *efivarfs_mount(struct file_system_type *fs_type,