[PATCH 3/5] gqa-win: get_pci_info: Free parent_dev_info properly

Kostiantyn Kostiuk posted 5 patches 4 years, 1 month ago
Maintainers: Michael Roth <michael.roth@amd.com>
There is a newer version of this series
[PATCH 3/5] gqa-win: get_pci_info: Free parent_dev_info properly
Posted by Kostiantyn Kostiuk 4 years, 1 month ago
In case when the function fails to get parent device data,
the parent_dev_info variable will be initialized, but not freed.

Signed-off-by: Kostiantyn Kostiuk <kkostiuk@redhat.com>
Signed-off-by: Kostiantyn Kostiuk <konstantin@daynix.com>
---
 qga/commands-win32.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/qga/commands-win32.c b/qga/commands-win32.c
index 12f7a88078..cef14a8762 100644
--- a/qga/commands-win32.c
+++ b/qga/commands-win32.c
@@ -515,6 +515,8 @@ DEFINE_GUID(GUID_DEVINTERFACE_STORAGEPORT,
 static GuestPCIAddress *get_pci_info(int number, Error **errp)
 {
     HDEVINFO dev_info = INVALID_HANDLE_VALUE;
+    HDEVINFO parent_dev_info = INVALID_HANDLE_VALUE;
+
     SP_DEVINFO_DATA dev_info_data;
     SP_DEVICE_INTERFACE_DATA dev_iface_data;
     HANDLE dev_file;
@@ -542,7 +544,6 @@ static GuestPCIAddress *get_pci_info(int number, Error **errp)
         PSP_DEVICE_INTERFACE_DETAIL_DATA pdev_iface_detail_data = NULL;
         STORAGE_DEVICE_NUMBER sdn;
         char *parent_dev_id = NULL;
-        HDEVINFO parent_dev_info;
         SP_DEVINFO_DATA parent_dev_info_data;
         DWORD j;
         DWORD size = 0;
@@ -744,11 +745,13 @@ static GuestPCIAddress *get_pci_info(int number, Error **errp)
                 break;
             }
         }
-        SetupDiDestroyDeviceInfoList(parent_dev_info);
         break;
     }

 cleanup:
+    if (parent_dev_info != INVALID_HANDLE_VALUE) {
+        SetupDiDestroyDeviceInfoList(parent_dev_info);
+    }
     if (dev_info != INVALID_HANDLE_VALUE) {
         SetupDiDestroyDeviceInfoList(dev_info);
     }
--
2.25.1

Re: [PATCH 3/5] gqa-win: get_pci_info: Free parent_dev_info properly
Posted by Marc-André Lureau 4 years, 1 month ago
On Mon, Dec 13, 2021 at 3:16 PM Kostiantyn Kostiuk
<konstantin@daynix.com> wrote:
>
> In case when the function fails to get parent device data,
> the parent_dev_info variable will be initialized, but not freed.
>
> Signed-off-by: Kostiantyn Kostiuk <kkostiuk@redhat.com>
> Signed-off-by: Kostiantyn Kostiuk <konstantin@daynix.com>

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>

> ---
>  qga/commands-win32.c | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/qga/commands-win32.c b/qga/commands-win32.c
> index 12f7a88078..cef14a8762 100644
> --- a/qga/commands-win32.c
> +++ b/qga/commands-win32.c
> @@ -515,6 +515,8 @@ DEFINE_GUID(GUID_DEVINTERFACE_STORAGEPORT,
>  static GuestPCIAddress *get_pci_info(int number, Error **errp)
>  {
>      HDEVINFO dev_info = INVALID_HANDLE_VALUE;
> +    HDEVINFO parent_dev_info = INVALID_HANDLE_VALUE;
> +
>      SP_DEVINFO_DATA dev_info_data;
>      SP_DEVICE_INTERFACE_DATA dev_iface_data;
>      HANDLE dev_file;
> @@ -542,7 +544,6 @@ static GuestPCIAddress *get_pci_info(int number, Error **errp)
>          PSP_DEVICE_INTERFACE_DETAIL_DATA pdev_iface_detail_data = NULL;
>          STORAGE_DEVICE_NUMBER sdn;
>          char *parent_dev_id = NULL;
> -        HDEVINFO parent_dev_info;
>          SP_DEVINFO_DATA parent_dev_info_data;
>          DWORD j;
>          DWORD size = 0;
> @@ -744,11 +745,13 @@ static GuestPCIAddress *get_pci_info(int number, Error **errp)
>                  break;
>              }
>          }
> -        SetupDiDestroyDeviceInfoList(parent_dev_info);
>          break;
>      }
>
>  cleanup:
> +    if (parent_dev_info != INVALID_HANDLE_VALUE) {
> +        SetupDiDestroyDeviceInfoList(parent_dev_info);
> +    }
>      if (dev_info != INVALID_HANDLE_VALUE) {
>          SetupDiDestroyDeviceInfoList(dev_info);
>      }
> --
> 2.25.1
>