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Merge branch 'f18'
Conflicts: grub2.spec Signed-off-by: Peter Jones <pjones@redhat.com>
This commit is contained in:
commit
1f0786299e
2 changed files with 50 additions and 28 deletions
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@ -1,43 +1,62 @@
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From 7a65d7b558974c89f19afaf0d78b54dc0327f56c Mon Sep 17 00:00:00 2001
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From: Matthew Garrett <mjg@redhat.com>
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Date: Wed, 15 Aug 2012 09:53:05 -0400
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Subject: [PATCH] Don't permit insmod on secure boot
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From 8a2a8d6021d926f00c5f85dab2d66f4ed8be86a2 Mon Sep 17 00:00:00 2001
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From: Colin Watson <cjwatson@ubuntu.com>
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Date: Tue, 23 Oct 2012 10:40:49 -0400
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Subject: [PATCH] Don't allow insmod when secure boot is enabled.
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Hi,
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Fedora's patch to forbid insmod in UEFI Secure Boot environments is fine
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as far as it goes. However, the insmod command is not the only way that
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modules can be loaded. In particular, the 'normal' command, which
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implements the usual GRUB menu and the fully-featured command prompt,
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will implicitly load commands not currently loaded into memory. This
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permits trivial Secure Boot violations by writing commands implementing
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whatever you want to do and pointing $prefix at the malicious code.
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I'm currently test-building this patch (replacing your current
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grub-2.00-no-insmod-on-sb.patch), but this should be more correct. It
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moves the check into grub_dl_load_file.
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---
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grub-core/kern/corecmd.c | 9 +++++++++
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grub-core/kern/dl.c | 17 +++++++++++++++++
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grub-core/kern/efi/efi.c | 28 ++++++++++++++++++++++++++++
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include/grub/efi/efi.h | 1 +
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3 files changed, 38 insertions(+)
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3 files changed, 46 insertions(+)
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diff --git a/grub-core/kern/corecmd.c b/grub-core/kern/corecmd.c
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index eec575c..3df9dbd 100644
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--- a/grub-core/kern/corecmd.c
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+++ b/grub-core/kern/corecmd.c
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@@ -28,6 +28,10 @@
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#include <grub/command.h>
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#include <grub/i18n.h>
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diff --git a/grub-core/kern/dl.c b/grub-core/kern/dl.c
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index a498682..2578fce 100644
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--- a/grub-core/kern/dl.c
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+++ b/grub-core/kern/dl.c
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@@ -43,6 +43,10 @@
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#include <sys/mman.h>
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#endif
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+#ifdef GRUB_MACHINE_EFI
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+#include <grub/efi/efi.h>
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+#endif
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+
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/* set ENVVAR=VALUE */
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static grub_err_t
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grub_core_cmd_set (struct grub_command *cmd __attribute__ ((unused)),
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@@ -81,6 +85,13 @@ grub_core_cmd_insmod (struct grub_command *cmd __attribute__ ((unused)),
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{
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grub_dl_t mod;
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#pragma GCC diagnostic ignored "-Wcast-align"
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@@ -721,6 +725,19 @@ grub_dl_load_file (const char *filename)
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void *core = 0;
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grub_dl_t mod = 0;
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+#ifdef GRUB_MACHINE_EFI
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+ if (grub_efi_secure_boot()) {
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+ //grub_printf("%s\n", N_("Secure Boot forbids insmod"));
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+ if (grub_efi_secure_boot ())
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+ {
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+#if 0
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+ /* This is an error, but grub2-mkconfig still generates a pile of
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+ * insmod commands, so emitting it would be mostly just obnoxious. */
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+ grub_error (GRUB_ERR_ACCESS_DENIED,
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+ "Secure Boot forbids loading module from %s", filename);
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+#endif
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+ return 0;
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+ }
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+#endif
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+
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if (argc == 0)
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return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("one argument expected"));
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file = grub_file_open (filename);
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if (! file)
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return 0;
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diff --git a/grub-core/kern/efi/efi.c b/grub-core/kern/efi/efi.c
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index 820968f..ad7aa8d 100644
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--- a/grub-core/kern/efi/efi.c
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@ -90,5 +109,5 @@ index 9370fd5..a000c38 100644
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EXPORT_FUNC (grub_efi_compare_device_paths) (const grub_efi_device_path_t *dp1,
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const grub_efi_device_path_t *dp2);
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--
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1.7.11.2
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1.7.12.1
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@ -41,7 +41,7 @@
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Name: grub2
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Epoch: 1
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Version: 2.00
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Release: 11%{?dist}
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Release: 12%{?dist}
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Summary: Bootloader with support for Linux, Multiboot and more
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Group: System Environment/Base
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@ -425,6 +425,9 @@ fi
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%doc grub-%{tarversion}/themes/starfield/COPYING.CC-BY-SA-3.0
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%changelog
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* Tue Oct 23 2012 Peter Jones <pjones@redhat.com> - 2.00-12
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- Don't load modules when grub transitions to "normal" mode on UEFI.
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* Mon Oct 22 2012 Peter Jones <pjones@redhat.com> - 2.00-11
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- Rebuild with newer pesign so we'll get signed with the final signing keys.
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