From: Ranbir Singh <ranbir.sin...@dell.com>
The function USBMouseDriverBindingStart do have
ASSERT (UsbMouseDevice != NULL);
after AllocateZeroPool, but it is applicable only in DEBUG mode.
In RELEASE mode, if for whatever reasons UsbMouseDevice is NULL
at this point, the code proceeds to dereference "UsbMouseDevice"
afterwards which will lead to CRASH.
Hence, for safety add NULL pointer checks always.
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4222
Cc: Hao A Wu <hao.a...@intel.com>
Cc: Ray Ni <ray...@intel.com>
Co-authored-by: Veeresh Sangolli <veeresh.sango...@dellteam.com>
Signed-off-by: Ranbir Singh <ranbir.sin...@dell.com>
Signed-off-by: Ranbir Singh <rsi...@ventanamicro.com>
---
MdeModulePkg/Bus/Usb/UsbMouseDxe/UsbMouse.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/MdeModulePkg/Bus/Usb/UsbMouseDxe/UsbMouse.c
b/MdeModulePkg/Bus/Usb/UsbMouseDxe/UsbMouse.c
index 451d4b934f4c..621d09713b24 100644
--- a/MdeModulePkg/Bus/Usb/UsbMouseDxe/UsbMouse.c
+++ b/MdeModulePkg/Bus/Usb/UsbMouseDxe/UsbMouse.c
@@ -161,6 +161,10 @@ USBMouseDriverBindingStart (
UsbMouseDevice = AllocateZeroPool (sizeof (USB_MOUSE_DEV));
ASSERT (UsbMouseDevice != NULL);
+ if (UsbMouseDevice == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto ErrorExit;
+ }
UsbMouseDevice->UsbIo = UsbIo;
UsbMouseDevice->Signature = USB_MOUSE_DEV_SIGNATURE;
--
2.34.1
-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#109308): https://edk2.groups.io/g/devel/message/109308
Mute This Topic: https://groups.io/mt/101750273/21656
Group Owner: devel+ow...@edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com]
-=-=-=-=-=-=-=-=-=-=-=-
