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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Vladimir Serbinenko <phcoder@gmail.com>
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Date: Thu, 7 May 2015 16:23:39 +0200
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Subject: [PATCH] linux.c: Ensure that initrd is page-aligned.
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---
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grub-core/loader/i386/linux.c | 11 +++++------
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1 file changed, 5 insertions(+), 6 deletions(-)
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diff --git a/grub-core/loader/i386/linux.c b/grub-core/loader/i386/linux.c
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index 53f74ae0685..764cde20318 100644
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--- a/grub-core/loader/i386/linux.c
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+++ b/grub-core/loader/i386/linux.c
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@@ -70,7 +70,6 @@ static grub_addr_t prot_mode_target;
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static void *initrd_mem;
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static grub_addr_t initrd_mem_target;
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static grub_size_t prot_init_space;
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-static grub_uint32_t initrd_pages;
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static struct grub_relocator *relocator = NULL;
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static void *efi_mmap_buf;
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static grub_size_t maximal_cmdline_size;
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@@ -1055,7 +1054,7 @@ static grub_err_t
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grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
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int argc, char *argv[])
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{
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- grub_size_t size = 0;
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+ grub_size_t size = 0, aligned_size = 0;
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grub_addr_t addr_min, addr_max;
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grub_addr_t addr;
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grub_err_t err;
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@@ -1077,8 +1076,7 @@ grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
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goto fail;
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size = grub_get_initrd_size (&initrd_ctx);
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-
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- initrd_pages = (page_align (size) >> 12);
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+ aligned_size = ALIGN_UP (size, 4096);
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/* Get the highest address available for the initrd. */
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if (grub_le_to_cpu16 (linux_params.version) >= 0x0203)
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@@ -1106,7 +1104,7 @@ grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
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addr_min = (grub_addr_t) prot_mode_target + prot_init_space;
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/* Put the initrd as high as possible, 4KiB aligned. */
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- addr = (addr_max - size) & ~0xFFF;
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+ addr = (addr_max - aligned_size) & ~0xFFF;
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if (addr < addr_min)
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{
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@@ -1117,7 +1115,8 @@ grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
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{
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grub_relocator_chunk_t ch;
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err = grub_relocator_alloc_chunk_align (relocator, &ch,
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- addr_min, addr, size, 0x1000,
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+ addr_min, addr, aligned_size,
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+ 0x1000,
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GRUB_RELOCATOR_PREFERENCE_HIGH,
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1);
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if (err)
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