From: Peter Lieven <pl@kamp.de>
To: qemu-devel@nongnu.org
Cc: kwolf@redhat.com, pbonzini@redhat.com, Peter Lieven <pl@kamp.de>,
qemu-stable@nongnu.org, stefanha@redhat.com
Subject: [Qemu-devel] [PATCH] block/iscsi: fix memory corruption on iscsi resize
Date: Fri, 22 Aug 2014 10:08:49 +0200 [thread overview]
Message-ID: <1408694929-1771-1-git-send-email-pl@kamp.de> (raw)
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>
---
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));
}
--
1.7.9.5
next reply other threads:[~2014-08-22 8:09 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-22 8:08 Peter Lieven [this message]
2014-08-22 8:55 ` [Qemu-devel] [PATCH] block/iscsi: fix memory corruption on iscsi resize Kevin Wolf
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