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block/qcow2-bitmap: fix use of uninitialized pointer 

Without initialization to zero dirty_bitmap field may be not zero
for a bitmap which should not be stored and
qcow2_store_persistent_dirty_bitmaps will erroneously call
store_bitmap for it which leads to SIGSEGV on bdrv_dirty_bitmap_name.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-id: 20170922144353.4220-1-vsementsov@virtuozzo.com
Cc: qemu-stable@nongnu.org
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2017-09-22 17:43:53 +03:00 committed by Max Reitz
parent fefac70d2a
commit 5330f32b71
1 changed files with 1 additions and 1 deletions
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2
block/qcow2-bitmap.c
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@ -602,7 +602,7 @@ static Qcow2BitmapList *bitmap_list_load(BlockDriverState *bs, uint64_t offset,
goto fail;
}
bm = g_new(Qcow2Bitmap, 1);
bm = g_new0(Qcow2Bitmap, 1);
bm->table.offset = e->bitmap_table_offset;
bm->table.size = e->bitmap_table_size;
bm->flags = e->flags;