3e8e326ed9
- Add patch to free memory on exit in efi environments (bsc#980739) * grub2-efi-Free-malloc-regions-on-exit.patch OBS-URL: https://build.opensuse.org/request/show/396838 OBS-URL: https://build.opensuse.org/package/show/Base:System/grub2?expand=0&rev=215
89 lines
3.1 KiB
Diff
89 lines
3.1 KiB
Diff
From 0c5fbc745846a53cc04ac1052cfbd35c699394c5 Mon Sep 17 00:00:00 2001
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From: Alexander Graf <agraf@suse.de>
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Date: Thu, 19 May 2016 15:01:06 +0200
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Subject: [PATCH] efi: Free malloc regions on exit
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When we exit grub, we don't free all the memory that we allocated earlier
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for our heap region. This can cause problems with setups where you try
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to descend the boot order using "exit" entries, such as PXE -> HD boot
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scenarios.
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Signed-off-by: Alexander Graf <agraf@suse.de>
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---
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grub-core/kern/efi/init.c | 1 +
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grub-core/kern/efi/mm.c | 24 ++++++++++++++++++++++++
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include/grub/efi/efi.h | 1 +
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3 files changed, 26 insertions(+)
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Index: grub-2.02~beta3/grub-core/kern/efi/init.c
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===================================================================
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--- grub-2.02~beta3.orig/grub-core/kern/efi/init.c
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+++ grub-2.02~beta3/grub-core/kern/efi/init.c
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@@ -167,4 +167,5 @@ grub_efi_fini (void)
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{
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grub_efidisk_fini ();
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grub_console_fini ();
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+ grub_efi_memory_fini ();
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}
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Index: grub-2.02~beta3/grub-core/kern/efi/mm.c
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===================================================================
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--- grub-2.02~beta3.orig/grub-core/kern/efi/mm.c
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+++ grub-2.02~beta3/grub-core/kern/efi/mm.c
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@@ -49,6 +49,12 @@ static grub_efi_uintn_t finish_desc_size
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static grub_efi_uint32_t finish_desc_version;
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int grub_efi_is_finished = 0;
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+struct efi_allocation {
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+ grub_uint64_t start_addr;
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+ grub_uint64_t pages;
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+} efi_allocated_memory[16];
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+unsigned int efi_allocated_memory_idx = 0;
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+
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/* Allocate pages below a specified address */
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void *
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grub_efi_allocate_pages_max (grub_efi_physical_address_t max,
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@@ -440,6 +446,13 @@ add_memory_regions (grub_efi_memory_desc
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(void *) ((grub_addr_t) start),
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(unsigned) pages);
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+ /* Track up to 16 regions that we allocate from */
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+ if (efi_allocated_memory_idx < ARRAY_SIZE(efi_allocated_memory)) {
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+ efi_allocated_memory[efi_allocated_memory_idx].start_addr = start;
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+ efi_allocated_memory[efi_allocated_memory_idx].pages = pages;
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+ efi_allocated_memory_idx++;
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+ }
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+
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grub_mm_init_region (addr, PAGES_TO_BYTES (pages));
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required_pages -= pages;
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@@ -451,6 +464,17 @@ add_memory_regions (grub_efi_memory_desc
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grub_fatal ("too little memory");
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}
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+void
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+grub_efi_memory_fini (void)
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+{
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+ unsigned int i;
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+
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+ for (i = 0; i < efi_allocated_memory_idx; i++) {
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+ grub_efi_free_pages (efi_allocated_memory[i].start_addr,
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+ efi_allocated_memory[i].pages);
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+ }
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+}
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+
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#if 0
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/* Print the memory map. */
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static void
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Index: grub-2.02~beta3/include/grub/efi/efi.h
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===================================================================
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--- grub-2.02~beta3.orig/include/grub/efi/efi.h
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+++ grub-2.02~beta3/include/grub/efi/efi.h
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@@ -51,6 +51,7 @@ EXPORT_FUNC(grub_efi_get_memory_map) (gr
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grub_efi_uintn_t *map_key,
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grub_efi_uintn_t *descriptor_size,
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grub_efi_uint32_t *descriptor_version);
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+void grub_efi_memory_fini (void);
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grub_efi_loaded_image_t *EXPORT_FUNC(grub_efi_get_loaded_image) (grub_efi_handle_t image_handle);
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void EXPORT_FUNC(grub_efi_print_device_path) (grub_efi_device_path_t *dp);
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char *EXPORT_FUNC(grub_efi_get_filename) (grub_efi_device_path_t *dp);
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