61f1d0a612
If the firmware happens to return 0 as an address of allocated pages, grub_efi_allocate_pages_real() tries to allocate a new set of pages, and then free the ones at address 0. However at that point grub_efi_store_alloc() wasn't yet called, so freeing the pages at 0 using grub_efi_free_pages() which calls grub_efi_drop_alloc() isn't necessary, so let's call b->free_pages() instead. The call to grub_efi_drop_alloc() doesn't seem particularly harmful, because it seems to do nothing if the allocation it is asked to drop isn't on the list, but the call to it is obviously unnecessary here. Signed-off-by: Mate Kukri <mate.kukri@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'