[Qemu-devel] [PATCH 16/25] block/iscsi: fix memory corruption on iscsi resize

[Michael Roth <mdroth@linux.vnet.ibm.com>]

From: Peter Lieven <pl@kamp.de>

bs->total_sectors is not yet updated at this point. resulting
in memory corruption if the volume has grown and data is written
to the newly availble areas.

CC: qemu-stable@nongnu.org
Signed-off-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit d832fb4d66ead62da4af7e44cce34cd939e865e1)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
 block/iscsi.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/block/iscsi.c b/block/iscsi.c
index a7bb697..ed883c3 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -1509,7 +1509,8 @@ static int iscsi_truncate(BlockDriverState *bs, int64_t offset)
     if (iscsilun->allocationmap != NULL) {
         g_free(iscsilun->allocationmap);
         iscsilun->allocationmap =
-            bitmap_new(DIV_ROUND_UP(bs->total_sectors,
+            bitmap_new(DIV_ROUND_UP(sector_lun2qemu(iscsilun->num_blocks,
+                                                    iscsilun),
                                     iscsilun->cluster_sectors));
     }
 
-- 
1.9.1