efivarfs: Free s_fs_info on unmount

Now that we allocate a s_fs_info struct on fs context creation, we
should ensure that we free it again when the superblock goes away.

Fixes: 5329aa5101f7 ("efivarfs: Add uid/gid mount options")
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

diff --git a/fs/efivarfs/super.c b/fs/efivarfs/super.c
index d4530e4eac06ae714636957b2cd4139caec16726..f954b1fab91597c3c2514bf1188f4255636d5ca1 100644 (file)
--- a/fs/efivarfs/super.c
+++ b/fs/efivarfs/super.c
@@ -368,10 +368,13 @@ static int efivarfs_init_fs_context(struct fs_context *fc)
 
 static void efivarfs_kill_sb(struct super_block *sb)
 {
+       struct efivarfs_fs_info *sfi = sb->s_fs_info;
+
        kill_litter_super(sb);
 
        /* Remove all entries and destroy */
        efivar_entry_iter(efivarfs_destroy, &efivarfs_list, NULL);
+       kfree(sfi);
 }
 
 static struct file_system_type efivarfs_type = {