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[Qemu-devel] [PATCHv2 15/20] block/get_block_status: avoid segfault if t
From: |
Peter Lieven |
Subject: |
[Qemu-devel] [PATCHv2 15/20] block/get_block_status: avoid segfault if there is no backing_hd |
Date: |
Tue, 17 Sep 2013 15:48:51 +0200 |
Reviewed-by: Eric Blake <address@hidden>
Signed-off-by: Peter Lieven <address@hidden>
---
block.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block.c b/block.c
index 805ee26..461a1d7 100644
--- a/block.c
+++ b/block.c
@@ -3195,7 +3195,7 @@ static int64_t coroutine_fn
bdrv_co_get_block_status(BlockDriverState *bs,
if (!(ret & BDRV_BLOCK_DATA)) {
if (bdrv_has_zero_init(bs)) {
ret |= BDRV_BLOCK_ZERO;
- } else {
+ } else if (bs->backing_hd) {
BlockDriverState *bs2 = bs->backing_hd;
int64_t length2 = bdrv_getlength(bs2);
if (length2 >= 0 && sector_num >= (length2 >> BDRV_SECTOR_BITS)) {
--
1.7.9.5
- Re: [Qemu-devel] [PATCHv2 11/20] iscsi: add bdrv_has_discard_zeroes and bdrv_has_discard_write_zeroes, (continued)
- [Qemu-devel] [PATCHv2 12/20] iscsi: add bdrv_co_write_zeroes, Peter Lieven, 2013/09/17
- [Qemu-devel] [PATCHv2 07/20] block: honour alignment and limit in bdrv_co_do_write_zeroes, Peter Lieven, 2013/09/17
- [Qemu-devel] [PATCHv2 14/20] block/get_block_status: set *pnum = 0 on error, Peter Lieven, 2013/09/17
- [Qemu-devel] [PATCHv2 13/20] block: introduce bdrv_zeroize, Peter Lieven, 2013/09/17
- [Qemu-devel] [PATCHv2 15/20] block/get_block_status: avoid segfault if there is no backing_hd,
Peter Lieven <=
- [Qemu-devel] [PATCHv2 20/20] block/raw: copy block limits and alignment information on raw_open, Peter Lieven, 2013/09/17
- [Qemu-devel] [PATCHv2 17/20] block/get_block_status: fix BDRV_BLOCK_ZERO for unallocated blocks, Peter Lieven, 2013/09/17
- [Qemu-devel] [PATCHv2 19/20] qemu-img: conditionally zero out target on convert, Peter Lieven, 2013/09/17
- [Qemu-devel] [PATCHv2 16/20] block/get_block_status: avoid redundant callouts on raw devices, Peter Lieven, 2013/09/17
- [Qemu-devel] [PATCHv2 18/20] qemu-img: add support for fully allocated images, Peter Lieven, 2013/09/17