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Rest of kernel allocator fixups 

Resolves: #2108456
Signed-off-by: Robbie Harwood <rharwood@redhat.com>
This commit is contained in:
Robbie Harwood 2022-08-02 14:42:02 +00:00
parent 217d6ad6ef
commit 8f1a5b9955
4 changed files with 127 additions and 1 deletions
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58
0283-efi-allocate-the-initrd-within-the-bounds-expressed-.patch Normal file
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@ -0,0 +1,58 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Peter Jones <pjones@redhat.com>
Date: Mon, 1 Aug 2022 14:07:50 -0400
Subject: [PATCH] efi: allocate the initrd within the bounds expressed by the
kernel
Currently on x86, only linux kernels built with CONFIG_RELOCATABLE for
x86_64 can be loaded above 4G, but the maximum address for the initramfs
is specified via a HdrS field. This allows us to utilize that value,
and unless loading the kernel above 4G, uses the value present there.
If loading kernel above 4G is allowed, we assume loading the initramfs
above 4G also works; in practice this has been true in the kernel code
for quite some time.
Resolves: rhbz#2112134
Signed-off-by: Peter Jones <pjones@redhat.com>
(cherry picked from commit 3e08c35f316990913718a4457665e8f653ecaa52)
---
grub-core/loader/i386/efi/linux.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/grub-core/loader/i386/efi/linux.c b/grub-core/loader/i386/efi/linux.c
index b9cd443a9a..801e663fee 100644
--- a/grub-core/loader/i386/efi/linux.c
+++ b/grub-core/loader/i386/efi/linux.c
@@ -191,6 +191,8 @@ grub_linuxefi_unload (void *data)
cmd_initrdefi->data = 0;
grub_free (context);
+ max_addresses[INITRD_MAX_ADDRESS].addr = GRUB_EFI_MAX_ALLOCATION_ADDRESS;
+
return GRUB_ERR_NONE;
}
@@ -439,11 +441,13 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
}
#endif
+ max_addresses[INITRD_MAX_ADDRESS].addr = lh->initrd_addr_max;
#if defined(__x86_64__)
if (lh->xloadflags & LINUX_XLF_CAN_BE_LOADED_ABOVE_4G)
{
grub_dprintf ("linux", "Loading kernel above 4GB is supported; enabling.\n");
max_addresses[KERNEL_NO_LIMIT].addr = GRUB_EFI_MAX_USABLE_ADDRESS;
+ max_addresses[INITRD_MAX_ADDRESS].addr = GRUB_EFI_MAX_USABLE_ADDRESS;
}
else
{
@@ -573,6 +577,8 @@ fail:
grub_dl_unref (my_mod);
+ max_addresses[INITRD_MAX_ADDRESS].addr = GRUB_EFI_MAX_ALLOCATION_ADDRESS;
+
if (lh)
kernel_free (cmdline, lh->cmdline_size + 1);

62
0284-efi-use-EFI_LOADER_-CODE-DATA-for-kernel-and-initrd-.patch Normal file
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@ -0,0 +1,62 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Peter Jones <pjones@redhat.com>
Date: Mon, 1 Aug 2022 13:04:43 -0400
Subject: [PATCH] efi: use EFI_LOADER_(CODE|DATA) for kernel and initrd
allocations
At some point due to an erroneous kernel warning, we switched kernel and
initramfs to being loaded in EFI_RUNTIME_SERVICES_CODE and
EFI_RUNTIME_SERVICES_DATA memory pools. This doesn't appear to be
correct according to the spec, and that kernel warning has gone away.
This patch puts them back in EFI_LOADER_CODE and EFI_LOADER_DATA
allocations, respectively.
Resolves: rhbz#2108456
Signed-off-by: Peter Jones <pjones@redhat.com>
(cherry picked from commit 35b5d5fa47bc394c76022e6595b173e68f53225e)
---
grub-core/loader/i386/efi/linux.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/grub-core/loader/i386/efi/linux.c b/grub-core/loader/i386/efi/linux.c
index 801e663fee..f23b3f7b01 100644
--- a/grub-core/loader/i386/efi/linux.c
+++ b/grub-core/loader/i386/efi/linux.c
@@ -280,7 +280,7 @@ grub_cmd_initrd (grub_command_t cmd, int argc, char *argv[])
}
grub_dprintf ("linux", "Trying to allocate initrd mem\n");
- initrd_mem = kernel_alloc(INITRD_MEM, size, GRUB_EFI_RUNTIME_SERVICES_DATA,
+ initrd_mem = kernel_alloc(INITRD_MEM, size, GRUB_EFI_LOADER_DATA,
N_("can't allocate initrd"));
if (initrd_mem == NULL)
goto fail;
@@ -456,7 +456,7 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
#endif
params = kernel_alloc (KERNEL_MEM, sizeof(*params),
- GRUB_EFI_RUNTIME_SERVICES_DATA,
+ GRUB_EFI_LOADER_DATA,
"cannot allocate kernel parameters");
if (!params)
goto fail;
@@ -480,7 +480,7 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
grub_dprintf ("linux", "setting up cmdline\n");
cmdline = kernel_alloc (KERNEL_MEM, lh->cmdline_size + 1,
- GRUB_EFI_RUNTIME_SERVICES_DATA,
+ GRUB_EFI_LOADER_DATA,
N_("can't allocate cmdline"));
if (!cmdline)
goto fail;
@@ -529,7 +529,7 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
kernel_size = lh->init_size;
grub_dprintf ("linux", "Trying to allocate kernel mem\n");
kernel_mem = kernel_alloc (KERNEL_MEM, kernel_size,
- GRUB_EFI_RUNTIME_SERVICES_CODE,
+ GRUB_EFI_LOADER_CODE,
N_("can't allocate kernel"));
restore_addresses();
if (!kernel_mem)

2
grub.patches
View File

@ -280,3 +280,5 @@ Patch0279: 0279-Make-debug-file-show-which-file-filters-get-run.patch
Patch0280: 0280-efi-make-the-default-arena-most-of-ram.patch
Patch0281: 0281-efi-use-enumerated-array-positions-for-our-allocatio.patch
Patch0282: 0282-efi-split-allocation-policy-for-kernel-vs-initrd-mem.patch
Patch0283: 0283-efi-allocate-the-initrd-within-the-bounds-expressed-.patch
Patch0284: 0284-efi-use-EFI_LOADER_-CODE-DATA-for-kernel-and-initrd-.patch

6
grub2.spec
View File

@ -14,7 +14,7 @@
Name: grub2
Epoch: 1
Version: 2.06
Release: 41%{?dist}
Release: 42%{?dist}
Summary: Bootloader with support for Linux, Multiboot and more
License: GPLv3+
URL: http://www.gnu.org/software/grub/
@ -532,6 +532,10 @@ mv ${EFI_HOME}/grub.cfg.stb ${EFI_HOME}/grub.cfg
%endif
%changelog
* Tue Aug 02 2022 Robbie Harwood <rharwood@redhat.com> - 2.06-42
- Rest of kernel allocator fixups
- Resolves: #2108456
* Tue Aug 02 2022 Robbie Harwood <rharwood@redhat.com> - 2.06-41
- Kernel allocator fixups
- Resolves: #2108456