File grub2-linuxefi-fix-boot-params.patch of Package grub2.13247

Index: grub-2.02~rc1/grub-core/loader/i386/efi/linux.c
===================================================================
--- grub-2.02~rc1.orig/grub-core/loader/i386/efi/linux.c
+++ grub-2.02~rc1/grub-core/loader/i386/efi/linux.c
@@ -324,7 +324,14 @@ grub_cmd_linux (grub_command_t cmd __att
       lh.code32_start = (grub_uint32_t)(grub_addr_t) kernel_mem;
     }
 
-  grub_memcpy(params, &lh, 2 * 512);
+  /* Grub linuxefi erroneously initialize linux's boot_params with non-zero values. (bsc#1025563)
+
+     From https://www.kernel.org/doc/Documentation/x86/boot.txt:
+     The memory for struct boot_params could be allocated anywhere (even above 4G)
+     and initialized to all zero.
+     Then, the setup header at offset 0x01f1 of kernel image on should be
+     loaded into struct boot_params and examined. */
+  grub_memcpy (&params->setup_sects, &lh.setup_sects, sizeof (lh) - 0x01f1);
 
   params->type_of_loader = 0x21;