This is kind of a mess, requiring lots of OS-specific code to iterate
over all possible devices. However, we use it in a number of scripts to
discover devices and reimplementing those in terms of something else
would be very complicated.
Author: Dimitri John Ledkov <dimitri.ledkov@canonical.com>
Forwarded: no
Last-Update: 2021-09-24
Patch-Name: restore-mkdevicemap.patch
Improve prepare_grub_to_access_device to emit appropriate commands for
such filesystems, and ignore them in Linux grub.d scripts.
This is needed for Ubuntu's Wubi installation method.
This patch isn't inherently Debian/Ubuntu-specific. losetup and
/proc/mounts are Linux-specific, though, so we might need to refine this
before sending it upstream. The changes to the Linux grub.d scripts
might be better handled by integrating 10_lupin properly instead.
Patch-Name: mkconfig-loopback.patch
Setting gfxpayload=keep has been known to cause efifb to be
inappropriately enabled. In any case, with the current Linux kernel the
result of this option is that early kernelspace will be unable to print
anything to the console, so (for example) if boot fails and you end up
dumped to an initramfs prompt, you won't be able to see anything on the
screen. As such it shouldn't be enabled by default in Debian, no matter
what kernel options are enabled.
gfxpayload=keep is a good idea but rather ahead of its time ...
Bug-Debian: http://bugs.debian.org/567245
Forwarded: no
Last-Update: 2013-12-25
Patch-Name: gfxpayload-keep-default.patch
The SECURITY file describes the GRUB project security policy.
It is based on https://github.com/wireapp/wire/blob/master/SECURITY.md
Signed-off-by: Alex Burmashev <alexander.burmashev@oracle.com>
Signed-off-by: Vladimir Serbinenko <phcoder@google.com>
Signed-off-by: Daniel Kiper <daniel.kiper@oracle.com>
The MAINTAINERS file provides basic information about the GRUB project
and its maintainers.
Signed-off-by: Alex Burmashev <alexander.burmashev@oracle.com>
Signed-off-by: Vladimir Serbinenko <phcoder@google.com>
Signed-off-by: Daniel Kiper <daniel.kiper@oracle.com>
Refactor clean_grub_dir() to create a backup of all the files, instead
of just irrevocably removing them as the first action. If available,
register atexit() handler to restore the backup if errors occur before
point of no return, or remove the backup if everything was successful.
If atexit() is not available, the backup remains on disk for manual
recovery.
Some platforms defined a point of no return, i.e. after modules & core
images were updated. Failures from any commands after that stage are
ignored, and backup is cleaned up. For example, on EFI platforms update
is not reverted when efibootmgr fails.
Extra care is taken to ensure atexit() handler is only invoked by the
parent process and not any children forks. Some older GRUB codebases
can invoke parent atexit() hooks from forks, which can mess up the
backup.
This allows safer upgrades of MBR & modules, such that
modules/images/fonts/translations are consistent with MBR in case of
errors. For example accidental grub-install /dev/non-existent-disk
currently clobbers and upgrades modules in /boot/grub, despite not
actually updating any MBR.
This patch only handles backup and restore of files copied to /boot/grub.
This patch does not perform backup (or restoration) of MBR itself or
blocklists. Thus when installing i386-pc platform, corruption may still
occur with MBR and blocklists which will not be attempted to be
automatically recovered.
Also add modinfo.sh and *.efi to the cleanup/backup/restore code path,
to ensure it is also cleaned, backed up and restored.
Signed-off-by: Dimitri John Ledkov <xnox@ubuntu.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
The functions grub_util_exec_pipe() and grub_util_exec_pipe_stderr()
currently call execvp(). If the call fails for any reason, the child
currently calls exit(127). This in turn executes the parents
atexit() handlers from the forked child, and then the same handlers
are called again from parent. This is usually not desired, and can
lead to deadlocks, and undesired behavior. So, change the exit() calls
to _exit() calls to avoid calling atexit() handlers from child.
Fixes: e75cf4a58 (unix exec: avoid atexit handlers when child exits)
Signed-off-by: Dimitri John Ledkov <xnox@ubuntu.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This fixes cross-compiling to x86 (e.g., the Hurd) from x86-linux of
grub-core/lib/i386/relocator64.S
This file has six sections that only build with a 64-bit assembler,
yet only the first two sections had support for a 32-bit assembler.
This patch completes this for the remaining sections.
To reproduce, update the GRUB source description in your local Guix
archive and run
./pre-inst-env guix build --system=i686-linux --target=i586-pc-gnu grub
or install an x86 cross-build environment on x86-linux (32-bit!) and
configure to cross build and make, e.g., do something like
./configure \
CC_FOR_BUILD=gcc \
--build=i686-unknown-linux-gnu \
--host=i586-pc-gnu
make
Additionally, remove a line with redundant spaces.
Signed-off-by: Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
The XFS now has an incompat feature flag to indicate that a filesystem
needs to be repaired. The Linux kernel refuses to mount the filesystem
that has it set and only the xfs_repair tool is able to clear that flag.
The GRUB doesn't have the concept of mounting filesystems and just
attempts to read the files. But it does some sanity checking before
attempting to read from the filesystem. Among the things which are tested,
is if the super block only has set of incompatible features flags that
are supported by GRUB. If it contains any flags that are not listed as
supported, reading the XFS filesystem fails.
Since the GRUB doesn't attempt to detect if the filesystem is inconsistent
nor replays the journal, the filesystem access is a best effort. For this
reason, ignore if the filesystem needs to be repaired and just print a debug
message. That way, if reading or booting fails later, the user is able to
figure out that the failures can be related to broken XFS filesystem.
Suggested-by: Eric Sandeen <esandeen@redhat.com>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
The XFS filesystem supports a bigtime feature to overcome y2038 problem.
This patch makes the GRUB able to support the XFS filesystems with this
feature enabled.
The XFS counter for the bigtime enabled timestamps starts at 0, which
translates to GRUB_INT32_MIN (Dec 31 20:45:52 UTC 1901) in the legacy
timestamps. The conversion to Unix timestamps is made before passing the
value to other GRUB functions.
For this to work properly, GRUB requires an access to flags2 field in the
XFS ondisk inode. So, the grub_xfs_inode structure has been updated to
cover full ondisk inode.
Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Some filesystems nowadays use 64-bit types for timestamps. So, update
grub_dirhook_info struct to use an grub_int64_t type to store mtime.
This also updates the grub_unixtime2datetime() function to receive
a 64-bit timestamp argument and do 64-bit-safe divisions.
All the remaining conversion from 32-bit to 64-bit should be safe, as
32-bit to 64-bit attributions will be implicitly casted. The most
critical part in the 32-bit to 64-bit conversion is in the function
grub_unixtime2datetime() where it needs to deal with the 64-bit type.
So, for that, the grub_divmod64() helper has been used.
These changes enables the GRUB to support dates beyond y2038.
Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
There are already PRI*_T constants defined for unsigned integers but not
for signed integers. Add format specifiers for the latter.
Suggested-by: Daniel Kiper <daniel.kiper@oracle.com>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
The efi_shim_lock_guid local variable and shim_lock_guid global variable
have the same GUID value. Only the latter is retained.
Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
The commit f60ba9e594 (util/mkimage: Refactor section setup to use a helper)
added a helper function to setup PE sections. But it also changed how the
raw data offsets were calculated since all the section sizes are aligned.
However, for some platforms, i.e ia64-efi and arm64-efi, the kernel image
size is not aligned using the section alignment. This leads to the situation
in which the mods section offset in its PE section header does not match its
real placement in the PE file. So, finally the GRUB is not able to locate
and load built-in modules.
The problem surfaces on ia64-efi and arm64-efi because both platforms
require additional relocation data which is added behind .bss section.
So, we have to add some padding behind this extra data to make the
beginning of mods section properly aligned in the PE file. Fix it by
aligning the kernel_size to the section alignment. That makes the sizes
and offsets in the PE section headers to match relevant sections in the
PE32+ binary file.
Reported-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Additionally, fix the terminfo spelling mistake in
the GRUB development documentation.
Signed-off-by: Daniel Kiper <daniel.kiper@oracle.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
This is an additional fix which has been missing from the commit 837fe48de
(i18n: Format large integers before the translation message).
Signed-off-by: Daniel Kiper <daniel.kiper@oracle.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
The GNU gettext only supports the ISO C99 macros for integral
types. If there is a need to use unsupported formatting macros,
e.g. PRIuGRUB_UINT64_T, according to [1] the number to a string
conversion should be separated from the code printing message
requiring the internationalization. So, the function grub_snprintf()
is used to print the numeric values to an intermediate buffer and
the internationalized message contains a string format directive.
[1] https://www.gnu.org/software/gettext/manual/html_node/Preparing-Strings.html#No-string-concatenation
Signed-off-by: Miguel Ángel Arruga Vivas <rosen644835@gmail.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Since commit 7ce3259f67 (video/fb/fbfill: Fix potential integer
overflow), clang builds of grub-emu have failed with messages like:
/usr/bin/ld: libgrubmods.a(libgrubmods_a-fbfill.o): in function `grub_video_fbfill_direct24':
fbfill.c:(.text+0x28e): undefined reference to `__muloti4'
This appears to be due to a weird quirk in how clang compiles
grub_mul(dst->mode_info->bytes_per_pixel, width, &rowskip)
which is grub_mul(unsigned int, int, &grub_size_t).
It looks like clang somewhere promotes everything to 128-bit maths
before ultimately reducing down to 64 bit for grub_size_t. I think
this is because width is signed, and indeed converting width to an
unsigned int makes the problem go away.
This conversion also makes more sense generally:
- the caller of all the fbfill_directN functions is
grub_video_fb_fill_dispatch() and it takes width and height as
unsigned ints already,
- it doesn't make sense to fill a negative width or height.
Convert the width and height arguments and associated loop counters
to unsigned ints.
Fixes: 7ce3259f67 (video/fb/fbfill: Fix potential integer overflow)
Signed-off-by: Daniel Axtens <dja@axtens.net>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Since the possessive form of "it" is being used, the apostrophe must be omitted.
Signed-off-by: Aru Sahni <aru@arusahni.net>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
The messages associated with other similar GRUB_ERR_OUT_OF_RANGE errors
were lacking the trailing full stop. Syncing up the strings saves a small
amount of precious core image space on i386-pc.
DOWN: obj/i386-pc/grub-core/kernel.img (31740 > 31708) - change: -32
DOWN: i386-pc core image (biosdisk ext2 part_msdos) (27453 > 27452) - change: -1
DOWN: i386-pc core image (biosdisk ext2 part_msdos diskfilter mdraid09) (32367 > 32359) - change: -8
Signed-off-by: Colin Watson <cjwatson@debian.org>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
The ext2 (and ext3, ext4) filesystems write the number of free inodes to
location 0x410.
On a MINIX filesystem, that same location is used for the MINIX superblock
magic number.
If the number of free inodes on an ext2 filesystem is equal to any
of the four MINIX superblock magic values plus any multiple of 65536,
GRUB's MINIX filesystem code will probe it as a MINIX filesystem.
In the case of an OS using ext2 as the root filesystem, since there will
ordinarily be some amount of file creation and deletion on every bootup,
it effectively means that this situation has a 1:16384 chance of being hit
on every reboot.
This will cause GRUB's filesystem probing code to mistakenly identify an
ext2 filesystem as MINIX. This can be seen by e.g. "search --label"
incorrectly indicating that no such ext2 partition with matching label
exists, whereas in fact it does.
After spotting the rough cause of the issue I was facing here, I borrowed
much of the diagnosis/explanation from meierfra who found and investigated
the same issue in util-linux in 2010:
https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/518582
This was fixed in util-linux by having the MINIX code check for the
ext2 magic. Do the same here.
Signed-off-by: Daniel Drake <drake@endlessm.com>
Reviewed-by: Derek Foreman <derek@endlessos.org>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
The hdr_offset member of the ARM Linux image header appears at
offset 0x3c, matching the PE/COFF spec's placement of the COFF
header offset in the MS-DOS header. We're currently off by four,
so fix that.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@arm.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This should help prevent format string errors and thus improve the quality
of error reporting.
Signed-off-by: Glenn Washburn <development@efficientek.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This is a temporary, less-intrusive change to get the build to success with
compiler format string checking turned on. There is a better fix which
addresses this issue, but it needs more testing. Use this change so that
format string checking on grub_error() can be turned on until the better
change is fully tested.
Signed-off-by: Glenn Washburn <development@efficientek.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
The macro ELF_R_TYPE does not change the underlying type. Here its argument
is a 64-bit Elf64_Xword. Make sure the format code matches.
For the RISC-V architecture, rel->r_info could be either Elf32_Xword or
Elf64_Xword depending on if 32 or 64-bit RISC-V is being built. So cast
to 64-bit value regardless.
Signed-off-by: Glenn Washburn <development@efficientek.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Also remove casting of format string args so that the architecture dependent
type is preserved.
Signed-off-by: Glenn Washburn <development@efficientek.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
The second format string argument, GRUB_EFI_MAX_USABLE_ADDRESS, is a macro
to a number literal. However, depending on what the target architecture, the
type can be 32 or 64 bits. Cast to a 64-bit integer. Also, change the
format string literals "%llx" to use PRIxGRUB_UINT64_T.
Signed-off-by: Glenn Washburn <development@efficientek.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
The format code is for a 32-bit int, but the argument, keyid, is declared as
a 64 bit int. The comment above says keyid is 32-bit. I'm not sure if the
comment or declaration is wrong, so force the display of a 64-bit int for now.
Signed-off-by: Glenn Washburn <development@efficientek.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
The grub_error() has a format string expecting two arguments, but only one
provided. According to the comments in the struct grub_nv_super definition,
the version field looks like a version number where major.minor is encoded
as each a byte in the two-byte short.
Signed-off-by: Glenn Washburn <development@efficientek.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
