FAILED: Patch "ocfs2: fix reflink preserve cleanup issue" failed to apply to 5.10-stable tree

The patch below does not apply to the 5.10-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

Thanks,
Sasha

------------------ original commit in Linus's tree ------------------

From 5138c936c2c82c9be8883921854bc6f7e1177d8c Mon Sep 17 00:00:00 2001
From: Heming Zhao <[email protected]>
Date: Wed, 10 Dec 2025 09:57:24 +0800
Subject: [PATCH] ocfs2: fix reflink preserve cleanup issue

commit c06c303832ec ("ocfs2: fix xattr array entry __counted_by error") doesn't handle all cases and the cleanup job for preserved xattr entries still has bug:
- the 'last' pointer should be shifted by one unit after cleanup an array entry.
- current code logic doesn't cleanup the first entry when xh_count is 1.

Note, commit c06c303832ec is also a bug fix for 0fe9b66c65f3.

---
 fs/ocfs2/xattr.c | 4 ++++
 1 file changed, 4 insertions(+)

index 5fd85f5178689..e434a62dd69f9 100644
@@ -6395,6 +6395,10 @@ static int ocfs2_reflink_xattr_header(handle_t *handle,
 					(void *)last - (void *)xe);
 				memset(last, 0,
 				       sizeof(struct ocfs2_xattr_entry));
+				last = &new_xh->xh_entries[le16_to_cpu(new_xh->xh_count)] - 1;
+			} else {
+				memset(xe, 0, sizeof(struct ocfs2_xattr_entry));
+				last = NULL;
 			}
 
 			/*

2.51.0