From: Ard Biesheuvel <ardb@kernel.org>
Date: Fri, 8 Dec 2023 16:39:28 +0000 (+0100)
Subject: efivarfs: Free s_fs_info on unmount
X-Git-Tag: v6.6.14~551
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=48be1364dd387e375e1274b76af986cb8747be2c;p=platform%2Fkernel%2Flinux-starfive.git

efivarfs: Free s_fs_info on unmount

[ Upstream commit 547713d502f7b4b8efccd409cff84d731a23853b ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/fs/efivarfs/super.c b/fs/efivarfs/super.c
index 05c0169..d59d967 100644
--- a/fs/efivarfs/super.c
+++ b/fs/efivarfs/super.c
@@ -299,6 +299,8 @@ 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);
 
 	if (!efivar_is_available())
@@ -306,6 +308,7 @@ static void efivarfs_kill_sb(struct super_block *sb)
 
 	/* Remove all entries and destroy */
 	efivar_entry_iter(efivarfs_destroy, &efivarfs_list, NULL);
+	kfree(sfi);
 }
 
 static struct file_system_type efivarfs_type = {