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[PATCH 12/17] hw/virtio/vhost-vsock: Fix missing ERRP_GUARD() for error_
From: |
Zhao Liu |
Subject: |
[PATCH 12/17] hw/virtio/vhost-vsock: Fix missing ERRP_GUARD() for error_prepend() |
Date: |
Thu, 29 Feb 2024 22:39:09 +0800 |
From: Zhao Liu <zhao1.liu@intel.com>
As the comment in qapi/error, passing @errp to error_prepend() requires
ERRP_GUARD():
* = Why, when and how to use ERRP_GUARD() =
*
* Without ERRP_GUARD(), use of the @errp parameter is restricted:
...
* - It should not be passed to error_prepend(), error_vprepend() or
* error_append_hint(), because that doesn't work with &error_fatal.
* ERRP_GUARD() lifts these restrictions.
*
* To use ERRP_GUARD(), add it right at the beginning of the function.
* @errp can then be used without worrying about the argument being
* NULL or &error_fatal.
ERRP_GUARD() could avoid the case when @errp is the pointer of
error_fatal, the user can't see this additional information, because
exit() happens in error_setg earlier than information is added [1].
The vhost_vsock_device_realize() passes @errp to error_prepend(), and as
a VirtioDeviceClass.realize method, its @errp is from
DeviceClass.realize so that there is no guarantee that the @errp won't
point to @error_fatal.
To avoid the issue like [1] said, add missing ERRP_GUARD() at the
beginning of this function.
[1]: Issue description in the commit message of commit ae7c80a7bd73
("error: New macro ERRP_GUARD()").
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
---
hw/virtio/vhost-vsock.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/hw/virtio/vhost-vsock.c b/hw/virtio/vhost-vsock.c
index d5ca0b5a1055..3d4a5a97f484 100644
--- a/hw/virtio/vhost-vsock.c
+++ b/hw/virtio/vhost-vsock.c
@@ -121,6 +121,7 @@ static const VMStateDescription vmstate_virtio_vhost_vsock
= {
static void vhost_vsock_device_realize(DeviceState *dev, Error **errp)
{
+ ERRP_GUARD();
VHostVSockCommon *vvc = VHOST_VSOCK_COMMON(dev);
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
VHostVSock *vsock = VHOST_VSOCK(dev);
--
2.34.1
- [PATCH 07/17] hw/vfio/helpers: Fix missing ERRP_GUARD() for error_prepend(), (continued)
- [PATCH 07/17] hw/vfio/helpers: Fix missing ERRP_GUARD() for error_prepend(), Zhao Liu, 2024/02/29
- [PATCH 08/17] hw/vfio/iommufd: Fix missing ERRP_GUARD() for error_prepend(), Zhao Liu, 2024/02/29
- [PATCH 09/17] hw/vfio/pci-quirks: Fix missing ERRP_GUARD() for error_prepend(), Zhao Liu, 2024/02/29
- [PATCH 10/17] hw/vfio/pci: Fix missing ERRP_GUARD() for error_prepend(), Zhao Liu, 2024/02/29
- [PATCH 11/17] hw/vfio/platform: Fix missing ERRP_GUARD() for error_prepend(), Zhao Liu, 2024/02/29
- [PATCH 12/17] hw/virtio/vhost-vsock: Fix missing ERRP_GUARD() for error_prepend(),
Zhao Liu <=
- [PATCH 13/17] hw/virtio/vhost: Fix missing ERRP_GUARD() for error_prepend(), Zhao Liu, 2024/02/29
- [PATCH 15/17] net/vhost-vdpa: Fix missing ERRP_GUARD() for error_prepend(), Zhao Liu, 2024/02/29
- [PATCH 14/17] migration/option: Fix missing ERRP_GUARD() for error_prepend(), Zhao Liu, 2024/02/29
- [PATCH 16/17] target/i386/sev: Fix missing ERRP_GUARD() for error_prepend(), Zhao Liu, 2024/02/29
- [PATCH 17/17] target/s390x/cpu_models: Fix missing ERRP_GUARD() for error_prepend(), Zhao Liu, 2024/02/29