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 after ASSERT_EFI_ERROR. The Bugzilla tracker for this: https://bugzilla.tianocore.org/show_bug.cgi?id=1631 Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Ming Huang <ming.hu...@linaro.org> --- MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c b/MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c index 4ce83ce22d61..0535cd7335b4 100644 --- a/MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c +++ b/MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c @@ -1069,6 +1069,9 @@ BmExpandMediaDevicePath ( // 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 ( -- 2.9.5 _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel
