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-rw-r--r--mm/memory-failure.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index db08af92c6fc..fabe55046c1d 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -938,6 +938,16 @@ static int hwpoison_user_mappings(struct page *p, unsigned long pfn,
BUG_ON(!PageHWPoison(p));
return SWAP_FAIL;
}
+ /*
+ * We pinned the head page for hwpoison handling,
+ * now we split the thp and we are interested in
+ * the hwpoisoned raw page, so move the refcount
+ * to it.
+ */
+ if (hpage != p) {
+ put_page(hpage);
+ get_page(p);
+ }
/* THP is split, so ppage should be the real poisoned page. */
ppage = p;
}