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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>
This commit is contained in:
Andy Whitcroft 2012-10-11 11:32:21 +01:00 committed by Matt Fleming
parent c0359db1a1
commit 5ba6e2919b
1 changed files with 18 additions and 2 deletions
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20
drivers/firmware/efivars.c
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@ -948,6 +948,7 @@ int efivarfs_fill_super(struct super_block *sb, void *data, int silent)
struct dentry *root; struct dentry *root;
struct efivar_entry *entry, *n; struct efivar_entry *entry, *n;
struct efivars *efivars = &__efivars; struct efivars *efivars = &__efivars;
char *name;
efivarfs_sb = sb; efivarfs_sb = sb;
@ -969,16 +970,18 @@ int efivarfs_fill_super(struct super_block *sb, void *data, int silent)
return -ENOMEM; return -ENOMEM;
list_for_each_entry_safe(entry, n, &efivars->list, list) { list_for_each_entry_safe(entry, n, &efivars->list, list) {
struct inode *inode;
struct dentry *dentry, *root = efivarfs_sb->s_root; struct dentry *dentry, *root = efivarfs_sb->s_root;
char *name;
unsigned long size = 0; unsigned long size = 0;
int len, i; int len, i;
inode = NULL;
len = utf16_strlen(entry->var.VariableName); len = utf16_strlen(entry->var.VariableName);
/* GUID plus trailing NULL */ /* GUID plus trailing NULL */
name = kmalloc(len + 38, GFP_ATOMIC); name = kmalloc(len + 38, GFP_ATOMIC);
if (!name)
goto fail;
for (i = 0; i < len; i++) for (i = 0; i < len; i++)
name[i] = entry->var.VariableName[i] & 0xFF; name[i] = entry->var.VariableName[i] & 0xFF;
@ -991,7 +994,13 @@ int efivarfs_fill_super(struct super_block *sb, void *data, int silent)
inode = efivarfs_get_inode(efivarfs_sb, root->d_inode, inode = efivarfs_get_inode(efivarfs_sb, root->d_inode,
S_IFREG | 0644, 0); S_IFREG | 0644, 0);
if (!inode)
goto fail_name;
dentry = d_alloc_name(root, name); dentry = d_alloc_name(root, name);
if (!dentry)
goto fail_inode;
/* copied by the above to local storage in the dentry. */ /* copied by the above to local storage in the dentry. */
kfree(name); kfree(name);
@ -1009,6 +1018,13 @@ int efivarfs_fill_super(struct super_block *sb, void *data, int silent)
} }
return 0; return 0;
fail_inode:
iput(inode);
fail_name:
kfree(name);
fail:
return -ENOMEM;
} }
static struct dentry *efivarfs_mount(struct file_system_type *fs_type, static struct dentry *efivarfs_mount(struct file_system_type *fs_type,