debian/patches/0006-load-linux-protected-mode.patch

   1 Author: Scot Doyle <lkml14@scotdoyle.com>
   2 Description: load_linux: relocate protected-mode code as intended
   3  If the kernel is relocatable and the protected mode code will not fit
   4  in the initially determined location, that code will be moved to the
   5  next available location. However, beginning with commit 8f470e7b, the
   6  code is moved to the initially determined location instead of the next
   7  available location because prot_mode_base is no longer updated to the
   8  correct location. Since whdr->code32_start is updated, it is pointing
   9  to the wrong execution start location, random code is executed and
  10  the machine is rebooted.
  11  .
  12  Restore the old behavior by assigning prot_mode_base the value of
  13  base. Tested on a machine that exposed this behavior.
  14
  15 diff -Naurp syslinux.orig/com32/lib/syslinux/load_linux.c syslinux/com32/lib/syslinux/load_linux.c
  16 --- syslinux.orig/com32/lib/syslinux/load_linux.c
  17 +++ syslinux/com32/lib/syslinux/load_linux.c
  18 @@ -323,6 +323,7 @@ int bios_boot_linux(void *kernel_buf, si
  19      }
  20
  21      whdr->code32_start += base - prot_mode_base;
  22 +    prot_mode_base = base;
  23
  24      /* Real mode code */
  25      if (syslinux_memmap_find(amap, &real_mode_base,