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Re: [Qemu-devel] [PATCH v4 01/11] qga-win: fix crashes when PCI info can
From: |
Marc-André Lureau |
Subject: |
Re: [Qemu-devel] [PATCH v4 01/11] qga-win: fix crashes when PCI info cannot be retrived |
Date: |
Thu, 4 Oct 2018 17:21:32 +0400 |
Hi
On Thu, Oct 4, 2018 at 3:22 PM Tomáš Golembiovský <address@hidden> wrote:
>
> The guest-get-fsinfo command collects also information about PCI
> controller where the disk is attached. When this fails for some reasons
> it tries to return just the partial information. However in certain
> cases the pointer to the structure was not initialized and was set to
> NULL. This breaks the serializer and leads to a crash of the guest agent.
>
> Signed-off-by: Tomáš Golembiovský <address@hidden>
> ---
> qga/commands-win32.c | 27 ++++++++++++++++++++++-----
> 1 file changed, 22 insertions(+), 5 deletions(-)
>
> diff --git a/qga/commands-win32.c b/qga/commands-win32.c
> index 98d9735389..9c959122d9 100644
> --- a/qga/commands-win32.c
> +++ b/qga/commands-win32.c
> @@ -633,15 +633,32 @@ static GuestDiskAddressList *build_guest_disk_info(char
> *guid, Error **errp)
> *
> https://technet.microsoft.com/en-us/library/ee851589(v=ws.10).aspx */
> if (DeviceIoControl(vol_h, IOCTL_SCSI_GET_ADDRESS, NULL, 0, scsi_ad,
> sizeof(SCSI_ADDRESS), &len, NULL)) {
> + Error *local_err = NULL;
> disk->unit = addr.Lun;
> disk->target = addr.TargetId;
> disk->bus = addr.PathId;
> - disk->pci_controller = get_pci_info(name, errp);
> + g_debug("unit=%lld target=%lld bus=%lld",
> + disk->unit, disk->target, disk->bus);
> + disk->pci_controller = get_pci_info(name, &local_err);
> +
> + if (local_err) {
> + g_debug("failed to get PCI controller info: %s",
> + error_get_pretty(local_err));
> + error_free(local_err);
> + } else if (disk->pci_controller != NULL) {
> + g_debug("pci: domain=%lld bus=%lld slot=%lld function=%lld",
> + disk->pci_controller->domain,
> + disk->pci_controller->bus,
> + disk->pci_controller->slot,
> + disk->pci_controller->function);
> + }
> }
> - /* We do not set error in this case, because we still have enough
> - * information about volume. */
> - } else {
> - disk->pci_controller = NULL;
> + }
> + /* We do not set error in case pci_controller is NULL, because we still
> + * have enough information about volume. */
> + if (disk->pci_controller == NULL) {
> + g_debug("no PCI controller info");
> + disk->pci_controller = g_malloc0(sizeof(GuestPCIAddress));
> }
Shouldn't pci-controller be made optional in the schema instead?
>
> list = g_malloc0(sizeof(*list));
> --
> 2.19.0
>
- [Qemu-devel] [PATCH v4 07/11] qga: report disk serial number, (continued)
- [Qemu-devel] [PATCH v4 07/11] qga: report disk serial number, Tomáš Golembiovský, 2018/10/04
- [Qemu-devel] [PATCH v4 02/11] qga-win: handle NULL values, Tomáš Golembiovský, 2018/10/04
- [Qemu-devel] [PATCH v4 04/11] qga-win: add debugging information, Tomáš Golembiovský, 2018/10/04
- [Qemu-devel] [PATCH v4 10/11] qga: return disk device in guest-get-fsinfo, Tomáš Golembiovský, 2018/10/04
- [Qemu-devel] [PATCH v4 01/11] qga-win: fix crashes when PCI info cannot be retrived, Tomáš Golembiovský, 2018/10/04
- [Qemu-devel] [PATCH v4 03/11] build: rename CONFIG_QGA_NTDDDISK to CONFIG_QGA_NTDDSCSI, Tomáš Golembiovský, 2018/10/04
- [Qemu-devel] [PATCH v4 08/11] qga-win: refactor disk info, Tomáš Golembiovský, 2018/10/04
- [Qemu-devel] [PATCH v4 11/11] qga-win: demystify namespace striping, Tomáš Golembiovský, 2018/10/04