The system environment: virtual-CDROM(USB interface) via BMC, insert a iso file to CDROM, like ubuntu-18.04.1-server-arm64.iso, change CDROM to first boot option. With release version bios, disconnecting CDROM when boot to "1 seconds left, Press Esc or F2 to enter Setup" then system will get a exception.
The root cause is the EFI_BLOCK_IO_PROTOCOL for UsbMass will be uninstalled in this situation after print some transfer error. The status will be invalid parameter. This line will get a exception for BlockIo not point to right address: AllocatePool (BlockIo->Media->BlockSize) So, here need to judge the status not using ASSERT_EFI_ERROR.
Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Ming Huang ming.huang@linaro.org --- MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c b/MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c index d5957db610d9..c2f1c651b02f 100644 --- a/MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c +++ b/MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c @@ -1068,7 +1068,9 @@ BmExpandMediaDevicePath ( // Block IO read/write will success. // Status = gBS->HandleProtocol (Handle, &gEfiBlockIoProtocolGuid, (VOID **) &BlockIo); - ASSERT_EFI_ERROR (Status); + if (EFI_ERROR (Status)) { + return NULL; + } Buffer = AllocatePool (BlockIo->Media->BlockSize); if (Buffer != NULL) { BlockIo->ReadBlocks (