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[Qemu-block] [PULL 49/56] block: Fail bdrv_truncate() with negative size
From: |
Kevin Wolf |
Subject: |
[Qemu-block] [PULL 49/56] block: Fail bdrv_truncate() with negative size |
Date: |
Fri, 9 Mar 2018 17:19:26 +0100 |
Most callers have their own checks, but something like this should also
be checked centrally. As it happens, x-blockdev-create can pass negative
image sizes to format drivers (because there is no QAPI type that would
reject negative numbers) and triggers the check added by this patch.
Signed-off-by: Kevin Wolf <address@hidden>
Reviewed-by: Max Reitz <address@hidden>
Reviewed-by: Eric Blake <address@hidden>
---
block.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/block.c b/block.c
index 00f94241fc..75a9fd49de 100644
--- a/block.c
+++ b/block.c
@@ -3719,6 +3719,11 @@ int bdrv_truncate(BdrvChild *child, int64_t offset,
PreallocMode prealloc,
error_setg(errp, "No medium inserted");
return -ENOMEDIUM;
}
+ if (offset < 0) {
+ error_setg(errp, "Image size cannot be negative");
+ return -EINVAL;
+ }
+
if (!drv->bdrv_truncate) {
if (bs->file && drv->is_filter) {
return bdrv_truncate(bs->file, offset, prealloc, errp);
--
2.13.6
- [Qemu-block] [PULL 40/56] nfs: Use QAPI options in nfs_client_open(), (continued)
- [Qemu-block] [PULL 40/56] nfs: Use QAPI options in nfs_client_open(), Kevin Wolf, 2018/03/09
- [Qemu-block] [PULL 47/56] ssh: Support .bdrv_co_create, Kevin Wolf, 2018/03/09
- [Qemu-block] [PULL 48/56] file-posix: Fix no-op bdrv_truncate() with falloc preallocation, Kevin Wolf, 2018/03/09
- [Qemu-block] [PULL 52/56] iotests: Test creating overlay when guest running, Kevin Wolf, 2018/03/09
- [Qemu-block] [PULL 51/56] qemu-iotests: Test ssh image creation over QMP, Kevin Wolf, 2018/03/09
- [Qemu-block] [PULL 53/56] iotests: Mark all tests executable, Kevin Wolf, 2018/03/09
- [Qemu-block] [PULL 44/56] ssh: Use QAPI BlockdevOptionsSsh object, Kevin Wolf, 2018/03/09
- [Qemu-block] [PULL 45/56] ssh: QAPIfy host-key-check option, Kevin Wolf, 2018/03/09
- [Qemu-block] [PULL 43/56] sheepdog: Support .bdrv_co_create, Kevin Wolf, 2018/03/09
- [Qemu-block] [PULL 46/56] ssh: Pass BlockdevOptionsSsh to connect_to_ssh(), Kevin Wolf, 2018/03/09
- [Qemu-block] [PULL 49/56] block: Fail bdrv_truncate() with negative size,
Kevin Wolf <=
- [Qemu-block] [PULL 50/56] qemu-iotests: Test qcow2 over file image creation with QMP, Kevin Wolf, 2018/03/09
- [Qemu-block] [PULL 54/56] iotests: Skip test for ENOMEM error, Kevin Wolf, 2018/03/09
- [Qemu-block] [PULL 56/56] qemu-iotests: fix 203 migration completion race, Kevin Wolf, 2018/03/09
- [Qemu-block] [PULL 55/56] iotests: Tweak 030 in order to trigger a race condition with parallel jobs, Kevin Wolf, 2018/03/09
- Re: [Qemu-block] [Qemu-devel] [PULL 00/56] Block layer patches, Peter Maydell, 2018/03/12