[PATCH v2 5/8] ext4: fix miss free super_block in extents_kunit_exit()

[Ye Bin <yebin@huaweicloud.com>]

From: Ye Bin <yebin10@huawei.com>

There's issue as follows:
ODEBUG: free active (active state 0) object: ffff88812f2d68a0 object type: percpu_counter hint: 0x0
 <TASK>
 debug_check_no_obj_freed+0x3d9/0x4d0
 kfree+0x2bb/0x6c0
 extents_kunit_exit+0x65/0x90 [ext4_test]
 kunit_try_run_case_cleanup+0xbc/0x100 [kunit]
 kunit_generic_run_threadfn_adapter+0x89/0x100 [kunit]
 kthread+0x408/0x540
 ret_from_fork+0xa76/0xdf0
 ret_from_fork_asm+0x1a/0x30

The above issue was caused because the super_block cleanup process
was not properly performed.
Therefore, deactivate_super() is called in extents_kunit_exit() to
cleanup the super_block.

Fixes: cb1e0c1d1fad ("ext4: kunit tests for extent splitting and conversion")
Signed-off-by: Ye Bin <yebin10@huawei.com>
---
 fs/ext4/extents-test.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ext4/extents-test.c b/fs/ext4/extents-test.c
index 5a5016ea1ecc..70d84c0a18e2 100644
--- a/fs/ext4/extents-test.c
+++ b/fs/ext4/extents-test.c
@@ -144,7 +144,7 @@ static void extents_kunit_exit(struct kunit *test)
 {
 	struct ext4_sb_info *sbi = k_ctx.k_ei->vfs_inode.i_sb->s_fs_info;
 
-	kfree(sbi);
+	deactivate_super(sbi->s_sb);
 	kfree(k_ctx.k_ei);
 	kfree(k_ctx.k_data);
 }
-- 
2.34.1