1 files changed, 5 insertions, 0 deletions
diff --git a/mm/gup.c b/mm/gup.c
index bbe416236593..e19b06a66229 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -2755,6 +2755,11 @@ static int gup_huge_pgd(pgd_t orig, pgd_t *pgdp, unsigned long addr,
 		return 0;
 	}
 
+	if (!pgd_write(orig) && gup_must_unshare(NULL, flags, &folio->page)) {
+		gup_put_folio(folio, refs, flags);
+		return 0;
+	}
+
 	*nr += refs;
 	folio_set_referenced(folio);
 	return 1;