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In the context of the implementation of the EFI_LOAD_FILE2_PROTOCOL for the initial ramdisk it was observed that opening the SNP protocol failed. https://lists.gnu.org/archive/html/grub-devel/2021-10/msg00020.html This is due to an incorrect call to CloseProtocol(). The first parameter of CloseProtocol() is the handle, not the interface. We call OpenProtocol() with ControllerHandle == NULL. Hence we must also call CloseProtcol() with ControllerHandel == NULL. Each call of OpenProtocol() for the same network card handle is expected to return the same interface pointer. If we want to close the protocol which we opened non-exclusively when searching for a card, we have to do this before opening the protocol exclusively. As there is no guarantee that we successfully open the protocol add checks in the transmit and receive functions. Reported-by: Andreas Schwab <schwab@linux-m68k.org> Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This is GRUB 2, the second version of the GRand Unified Bootloader. GRUB 2 is rewritten from scratch to make GNU GRUB cleaner, safer, more robust, more powerful, and more portable. See the file NEWS for a description of recent changes to GRUB 2. See the file INSTALL for instructions on how to build and install the GRUB 2 data and program files. See the file MAINTAINERS for information about the GRUB maintainers, etc. If you found a security vulnerability in the GRUB please check the SECURITY file to get more information how to properly report this kind of bugs to the maintainers. Please visit the official web page of GRUB 2, for more information. The URL is <http://www.gnu.org/software/grub/grub.html>. More extensive documentation is available in the Info manual, accessible using 'info grub' after building and installing GRUB 2. There are a number of important user-visible differences from the first version of GRUB, now known as GRUB Legacy. For a summary, please see: info grub Introduction 'Changes from GRUB Legacy'