Signed-off-by: Kirill Tkhai <[email protected]>
---
drivers/block/ploop/fmt_ploop1.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/block/ploop/fmt_ploop1.c b/drivers/block/ploop/fmt_ploop1.c
index 5ca9f257be31..f54b4bf2039c 100644
--- a/drivers/block/ploop/fmt_ploop1.c
+++ b/drivers/block/ploop/fmt_ploop1.c
@@ -659,6 +659,11 @@ static int expand_holes_bitmap(struct ploop_delta *delta,
if (!delta->holes_bitmap)
return 0;
+ /*
+ * According to BUG_ON() in ploop1_prepare_grow(),
+ * we do not support zero m_FirstBlockOffset
+ * at least since 2013.
+ */
md_off = vh->m_FirstBlockOffset >> log;
nr = md_off + vh->m_Size;
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