[PATCH v3 3/3] OvmfPkg/VirtioFsDxe: Check GetDriverName arguments

["Dimitrije Pavlov" <Dimitrije.Pavlov@arm.com>]

The current implementation does not check if Language or DriverName
are NULL. This causes the SCT test suite to crash.

Add a check to return EFI_INVALID_PARAMETER if any of these pointers
are NULL.

Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Sunny Wang <Sunny.Wang@arm.com>
Cc: Jeff Booher-Kaeding <Jeff.Booher-Kaeding@arm.com>
Cc: Samer El-Haj-Mahmoud <Samer.El-Haj-Mahmoud@arm.com>

Signed-off-by: Dimitrije Pavlov <Dimitrije.Pavlov@arm.com>
Reviewed-by: Sunny Wang <sunny.wang@arm.com>
---
 OvmfPkg/VirtioFsDxe/DriverBinding.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/OvmfPkg/VirtioFsDxe/DriverBinding.c b/OvmfPkg/VirtioFsDxe/DriverBinding.c
index 86eb9cf0ba51..69d2bb777089 100644
--- a/OvmfPkg/VirtioFsDxe/DriverBinding.c
+++ b/OvmfPkg/VirtioFsDxe/DriverBinding.c
@@ -218,6 +218,10 @@ VirtioFsGetDriverName (
   OUT CHAR16                        **DriverName
   )
 {
+  if ((Language == NULL) || (DriverName == NULL)) {
+    return EFI_INVALID_PARAMETER;
+  }
+
   if (AsciiStrCmp (Language, "en") != 0) {
     return EFI_UNSUPPORTED;
   }
-- 
2.37.2