From fcd2a43488d5a211aec94e28369b2a72c28258a2 Mon Sep 17 00:00:00 2001
From: "Darrick J. Wong" <djwong@kernel.org>
Date: Sun, 6 Nov 2022 17:03:15 -0800
Subject: [PATCH] xfs: initialize the check_owner object fully
Git-commit: fcd2a43488d5a211aec94e28369b2a72c28258a2
Patch-mainline: v6.2-rc1
References: git-fixes

Initialize the check_owner list head so that we don't corrupt the list.
Reduce the scope of the object pointer.

Fixes: 858333dcf021 ("xfs: check btree block ownership with bnobt/rmapbt when scrubbing btree")
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Acked-by: Anthony Iliopoulos <ailiop@suse.com>

---
 fs/xfs/scrub/btree.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/fs/xfs/scrub/btree.c
+++ b/fs/xfs/scrub/btree.c
@@ -407,7 +407,6 @@ xchk_btree_check_owner(
 	struct xfs_buf		*bp)
 {
 	struct xfs_btree_cur	*cur = bs->cur;
-	struct check_owner	*co;
 
 	/*
 	 * In theory, xfs_btree_get_block should only give us a null buffer
@@ -430,10 +429,14 @@ xchk_btree_check_owner(
 	 * later scanning.
 	 */
 	if (cur->bc_btnum == XFS_BTNUM_BNO || cur->bc_btnum == XFS_BTNUM_RMAP) {
+		struct check_owner	*co;
+
 		co = kmem_alloc(sizeof(struct check_owner),
 				KM_MAYFAIL);
 		if (!co)
 			return -ENOMEM;
+
+		INIT_LIST_HEAD(&co->list);
 		co->level = level;
 		co->daddr = XFS_BUF_ADDR(bp);
 		list_add_tail(&co->list, &bs->to_check);