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error handling enhancement for possible null pointer dereference

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Signed-off-by: erictian
Reviewed-by: ydong10


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12434 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
erictian
2011-09-23 05:17:31 +00:00
parent 0641c5405c
commit 6ac6017fe8
2 changed files with 18 additions and 10 deletions
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7
MdeModulePkg/Bus/Usb/UsbKbDxe/KeyBoard.c
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@@ -627,13 +627,18 @@ SetKeyboardLayoutEvent (
//
KeyCode = EfiKeyToUsbKeyCodeConvertionTable [(UINT8) (TempKey.Key)];
TableEntry = GetKeyDescriptor (UsbKeyboardDevice, KeyCode);
if (TableEntry == NULL) {
ReleaseKeyboardLayoutResources (UsbKeyboardDevice);
FreePool (KeyboardLayout);
return;
}
CopyMem (TableEntry, KeyDescriptor, sizeof (EFI_KEY_DESCRIPTOR));
//
// For non-spacing key, create the list with a non-spacing key followed by physical keys.
//
if (TempKey.Modifier == EFI_NS_KEY_MODIFIER) {
UsbNsKey = AllocatePool (sizeof (USB_NS_KEY));
UsbNsKey = AllocateZeroPool (sizeof (USB_NS_KEY));
ASSERT (UsbNsKey != NULL);
//