From: David Gibson <da...@gibson.dropbear.id.au>
The code for migrating (or savevm-ing) memory pages starts off by creating
a dirty bitmap and filling it with 1s. Except, actually, because bit
addresses are 0-based it fills every bit except bit 0 with 1s and puts an
extra 1 beyond the end of the bitmap, potentially corrupting unrelated
memory. Oops. This patch fixes it.
Signed-off-by: David Gibson <da...@gibson.dropbear.id.au>
Signed-off-by: Anthony Liguori <aligu...@us.ibm.com>
(cherry picked from commit 7ec81e56edc2b2007ce0ae3982aa5c18af9546ab)
Signed-off-by: Michael Roth <mdr...@linux.vnet.ibm.com>
---
arch_init.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch_init.c b/arch_init.c
index e6effe8..b75a4c5 100644
--- a/arch_init.c
+++ b/arch_init.c
@@ -568,7 +568,7 @@ static int ram_save_setup(QEMUFile *f, void *opaque)
int64_t ram_pages = last_ram_offset() >> TARGET_PAGE_BITS;
migration_bitmap = bitmap_new(ram_pages);
- bitmap_set(migration_bitmap, 1, ram_pages);
+ bitmap_set(migration_bitmap, 0, ram_pages);
migration_dirty_pages = ram_pages;
bytes_transferred = 0;
--
1.7.9.5
