From 5ec92856113867771a2017c4da4909815326624f Mon Sep 17 00:00:00 2001 From: Jan Janssen Date: Thu, 24 Mar 2022 10:35:30 +0100 Subject: [PATCH] boot: Restrict block IO buf size --- src/boot/efi/boot.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/src/boot/efi/boot.c b/src/boot/efi/boot.c index e7e5a6a367a..96e56a78391 100644 --- a/src/boot/efi/boot.c +++ b/src/boot/efi/boot.c @@ -2042,10 +2042,10 @@ static EFI_STATUS boot_windows_bitlocker(void) { for (UINTN i = 0; i < n_handles; i++) { EFI_BLOCK_IO *block_io; err = BS->HandleProtocol(handles[i], &BlockIoProtocol, (void **) &block_io); - if (EFI_ERROR(err) || block_io->Media->BlockSize < 512) + if (EFI_ERROR(err) || block_io->Media->BlockSize < 512 || block_io->Media->BlockSize > 4096) continue; - CHAR8 buf[block_io->Media->BlockSize]; + CHAR8 buf[4096]; err = block_io->ReadBlocks(block_io, block_io->Media->MediaId, 0, sizeof(buf), buf); if (EFI_ERROR(err)) continue; -- 2.47.3