EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.SetMode() should return EFI_UNDEFINED if a
screen mode is not available.
Signed-off-by: Heinrich Schuchardt <xypron.g...@gmx.de>
---
lib/efi_loader/efi_console.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/lib/efi_loader/efi_console.c b/lib/efi_loader/efi_console.c
index d5222c46b4..540a009145 100644
--- a/lib/efi_loader/efi_console.c
+++ b/lib/efi_loader/efi_console.c
@@ -375,6 +375,10 @@ static efi_status_t EFIAPI efi_cout_set_mode(
if (mode_number >= efi_con_mode.max_mode)
return EFI_EXIT(EFI_UNSUPPORTED);
+
+ if (!efi_cout_modes[mode_number].present)
+ return EFI_EXIT(EFI_UNSUPPORTED);
+
efi_con_mode.mode = mode_number;
EFI_CALL(efi_cout_clear_screen(this));
--
2.23.0.rc1
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