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| author | Heinrich Schuchardt <xypron.glpk@gmx.de> | 2019-09-04 22:46:13 +0200 |
|---|---|---|
| committer | Heinrich Schuchardt <xypron.glpk@gmx.de> | 2019-09-05 23:18:51 +0200 |
| commit | 03446987c5008fd1e3732b01fd63a29c7a6d9246 (patch) | |
| tree | b15c17a6cddd9b0290e32db73bd3b3522f8a2f7e | |
| parent | 97ea0690f4ea8b30f66fab7dc3bd439714647989 (diff) | |
efi_loader: do not set invalid screen mode
EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.SetMode() should return EFI_UNDEFINED if a
screen mode is not available.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Alexander Graf <agraf@csgraf.de>
| -rw-r--r-- | lib/efi_loader/efi_console.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/efi_loader/efi_console.c b/lib/efi_loader/efi_console.c index 5560fc8dea..5109017796 100644 --- a/lib/efi_loader/efi_console.c +++ b/lib/efi_loader/efi_console.c @@ -379,6 +379,10 @@ 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)); |