Sync from SUSE:SLFO:Main kexec-tools revision 50db5a46eaadf5ecb7b573355aa00474

This commit is contained in:
Adrian Schröter 2024-05-03 14:13:50 +02:00
commit 3e7c766f84
14 changed files with 3656 additions and 0 deletions

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## Default LFS
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From 6419b008fde783fd0cc2cc266bd1c9cf35e99a0e Mon Sep 17 00:00:00 2001
From: Julien Olivain <ju.o@free.fr>
Date: Sat, 23 Sep 2023 18:46:06 +0200
Subject: kexec: provide a memfd_create() wrapper if not present in libc
Commit 714fa115 "kexec/arm64: Simplify the code for zImage" introduced
a use of the memfd_create() system call, included in version
kexec-tools v2.0.27.
This system call was introduced in kernel commit [1], first included
in kernel v3.17 (released on 2014-10-05).
The memfd_create() glibc wrapper function was added much later in
commit [2], first included in glibc version 2.27 (released on
2018-02-01).
This direct use memfd_create() introduced a requirement on
Kernel >= 3.17 and glibc >= 2.27.
There is old toolchains like [3] for example (which ships gcc 7.3.1,
glibc 2.25 and includes kernel v4.10 headers), that can still be used
to build newer kernels. Even if such toolchains can be seen as
outdated, they are is still claimed as supported by recent kernel.
For example, Kernel v6.5.5 has a requirement on gcc version 5.1 and
greater. See [4].
Moreover, kexec-tools <= 2.0.26 could be compiled using recent
toolchains with alternative libc (e.g. uclibc-ng, musl) which are not
providing the memfd_create() wrapper.
When compiling kexec-tools v2.0.27 with a toolchain not providing the
memfd_create() syscall wrapper, the compilation fail with message:
kexec/kexec.c: In function 'copybuf_memfd':
kexec/kexec.c:645:7: warning: implicit declaration of function 'memfd_create'; did you mean 'SYS_memfd_create'? [-Wimplicit-function-declaration]
fd = memfd_create("kernel", MFD_ALLOW_SEALING);
^~~~~~~~~~~~
SYS_memfd_create
kexec/kexec.c:645:30: error: 'MFD_ALLOW_SEALING' undeclared (first use in this function); did you mean '_PC_ALLOC_SIZE_MIN'?
fd = memfd_create("kernel", MFD_ALLOW_SEALING);
^~~~~~~~~~~~~~~~~
_PC_ALLOC_SIZE_MIN
In order to let kexec-tools compile in a wider range of configurations,
this commit adds a memfd_create() function check in autoconf configure
script, and adds a system call wrapper which will be used if the
function is not available. With this commit, the environment
requirement is relaxed to only kernel >= v3.17.
Note: this issue was found in kexec-tools integration in Buildroot [5]
using the command "utils/test-pkg -a -p kexec", which tests many
toolchain/arch combinations.
[1] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=9183df25fe7b194563db3fec6dc3202a5855839c
[2] https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=59d2cbb1fe4b8601d5cbd359c3806973eab6c62d
[3] https://releases.linaro.org/components/toolchain/binaries/7.3-2018.05/aarch64-linux-gnu/gcc-linaro-7.3.1-2018.05-x86_64_aarch64-linux-gnu.tar.xz
[4] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/Documentation/process/changes.rst?h=v6.5.5#n32
[5] https://buildroot.org/
Signed-off-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: Simon Horman <horms@kernel.org>
---
configure.ac | 3 +++
kexec/kexec.c | 11 +++++++++++
2 files changed, 14 insertions(+)
diff --git a/configure.ac b/configure.ac
index 352eefee..602de79b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -208,6 +208,9 @@ if test "$ac_cv_lib_xenctrl_xc_kexec_load" = yes ; then
AC_MSG_NOTICE([The kexec_status call is not available]))
fi
+dnl Check if libc has the memfd_create() syscall wrapper
+AC_CHECK_FUNCS([memfd_create])
+
dnl ---Sanity checks
if test "$CC" = "no"; then AC_MSG_ERROR([cc not found]); fi
if test "$CPP" = "no"; then AC_MSG_ERROR([cpp not found]); fi
diff --git a/kexec/kexec.c b/kexec/kexec.c
index fdb4c984..08edfca2 100644
--- a/kexec/kexec.c
+++ b/kexec/kexec.c
@@ -31,6 +31,10 @@
#include <sys/mount.h>
#include <sys/types.h>
#include <sys/stat.h>
+#ifndef HAVE_MEMFD_CREATE
+#include <linux/memfd.h>
+#include <sys/syscall.h>
+#endif
#include <sys/reboot.h>
#include <sys/mman.h>
#include <unistd.h>
@@ -640,6 +644,13 @@ char *slurp_decompress_file(const char *filename, off_t *r_size)
return kernel_buf;
}
+#ifndef HAVE_MEMFD_CREATE
+static int memfd_create(const char *name, unsigned int flags)
+{
+ return syscall(SYS_memfd_create, name, flags);
+}
+#endif
+
static int copybuf_memfd(const char *kernel_buf, size_t size)
{
int fd, count;
--
cgit

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From: Jiri Bohac <jbohac@suse.cz>
Subject: [PATCH] kexec: dont use kexec_file_load on XEN
Patch-mainline: 94fbe64fb22d61726ca0c0996987574b6c783c19
References: bsc#1218590
Since commit 29fe5067ed07 ("kexec: make -a the default")
kexec tries the kexec_file_load syscall first and only falls back to kexec_load on
selected error codes.
This effectively breaks kexec on XEN, unless -c is pecified to force the kexec_load
syscall.
The XEN-specific functions (xen_kexec_load / xen_kexec_unload) are only called
from my_load / k_unload, i.e. the kexec_load code path.
With -p (panic kernel) kexec_file_load on XEN fails with -EADDRNOTAVAIL (crash
kernel reservation is ignored by the kernel on XEN), which is not in the list
of return codes that cause the fallback to kexec_file.
Without -p kexec_file_load actualy leads to a kernel oops on v6.4.0
(needs to be dubugged separately).
Signed-off-by: Jiri Bohac <jbohac@suse.cz>
Fixes: 29fe5067ed07 ("kexec: make -a the default")
---
kexec/kexec.8 | 1 +
kexec/kexec.c | 4 ++++
2 files changed, 5 insertions(+)
diff --git a/kexec/kexec.8 b/kexec/kexec.8
index b969cea..9e995fe 100644
--- a/kexec/kexec.8
+++ b/kexec/kexec.8
@@ -162,6 +162,7 @@ Specify that the new kernel is of this
.TP
.BI \-s\ (\-\-kexec-file-syscall)
Specify that the new KEXEC_FILE_LOAD syscall should be used exclusively.
+Ignored on XEN.
.TP
.BI \-c\ (\-\-kexec-syscall)
Specify that the old KEXEC_LOAD syscall should be used exclusively.
diff --git a/kexec/kexec.c b/kexec/kexec.c
index 08edfca..9d0ec46 100644
--- a/kexec/kexec.c
+++ b/kexec/kexec.c
@@ -1685,6 +1685,10 @@ int main(int argc, char *argv[])
}
}
}
+ if (xen_present()) {
+ do_kexec_file_syscall = 0;
+ do_kexec_fallback = 0;
+ }
if (do_kexec_file_syscall) {
if (do_load_jump_back_helper && !do_kexec_fallback)
die("--load-jump-back-helper not supported with kexec_file_load\n");
--
2.43.0

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[Unit]
Description=load default kernel into the current kernel
Documentation=man:kexec(8)
DefaultDependencies=no
Before=shutdown.target umount.target final.target
[Service]
Type=oneshot
ExecStart=/usr/sbin/kexec-bootloader
[Install]
WantedBy=kexec.target

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From: Petr Tesarik <ptesarik@suse.com>
Subject: Define SYS_getrandom if needed
Upstream: never, build fix for SLE12
SLE12 did not provide a definition for SYS_getrandom.
Signed-off-by: Petr Tesarik <ptesarik@suse.com>
---
configure.ac | 1 +
kexec/arch/arm64/kexec-arm64.c | 5 +++++
kexec/arch/i386/x86-linux-setup.c | 11 ++++++++++-
3 files changed, 16 insertions(+), 1 deletion(-)
--- a/configure.ac
+++ b/configure.ac
@@ -203,6 +203,7 @@ if test "$with_xen" = dl ; then
AC_MSG_NOTICE([Xen support disabled]))])
fi
+AC_CHECK_HEADERS([sys/random.h])
dnl Check for the Xen kexec_status hypercall - reachable from --with-xen=yes|dl
if test "$ac_cv_lib_xenctrl_xc_kexec_load" = yes ; then
AC_CHECK_LIB(xenctrl, xc_kexec_status,
--- a/kexec/arch/arm64/kexec-arm64.c
+++ b/kexec/arch/arm64/kexec-arm64.c
@@ -34,6 +34,11 @@
#include "mem_regions.h"
#include "arch/options.h"
+#ifndef __NR_getrandom
+#define __NR_getrandom 278
+__SYSCALL(__NR_getrandom, sys_getrandom)
+#endif
+
#define ROOT_NODE_ADDR_CELLS_DEFAULT 1
#define ROOT_NODE_SIZE_CELLS_DEFAULT 1
--- a/kexec/arch/i386/x86-linux-setup.c
+++ b/kexec/arch/i386/x86-linux-setup.c
@@ -24,7 +24,6 @@
#include <limits.h>
#include <sys/types.h>
#include <sys/stat.h>
-#include <sys/random.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <linux/fb.h>
@@ -38,6 +37,16 @@
#include "x86-linux-setup.h"
#include "../../kexec/kexec-syscall.h"
+#ifdef HAVE_SYS_RANDOM_H
+#include <sys/random.h>
+#else
+#include <linux/random.h>
+static ssize_t getrandom(void *buf, size_t buflen, unsigned int flags)
+{
+ return syscall(SYS_getrandom, buf, buflen, flags);
+}
+#endif
+
#ifndef VIDEO_CAPABILITY_64BIT_BASE
#define VIDEO_CAPABILITY_64BIT_BASE (1 << 1) /* Frame buffer base is 64-bit */
#endif

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From: Tony Jones <tonyj@suse.de>
Subject: Disable kexec_test
Disable kexec_test. It is not required in released product (matching latest
Fedora). Also one less file for usr_merge
---
Makefile.in | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
--- a/Makefile.in
+++ b/Makefile.in
@@ -173,8 +173,11 @@ PSRCS:=$(foreach s, $(SRCS), $(PACKAGE_N
PGSRCS:=$(foreach s, $(GENERATED_SRCS), $(PACKAGE_NAME)-$(PACKAGE_VERSION)/$(s))
MAN_PAGES:=$(KEXEC_MANPAGE) $(VMCORE_DMESG_MANPAGE)
-BINARIES_i386:=$(KEXEC_TEST)
-BINARIES_x86_64:=$(KEXEC_TEST)
+# Dont' build kexec_test
+#BINARIES_i386:=$(KEXEC_TEST)
+#BINARIES_x86_64:=$(KEXEC_TEST)
+BINARIES_i386:=
+BINARIES_x86_64:=
BINARIES:=$(KEXEC) $(VMCORE_DMESG) $(BINARIES_$(ARCH))
UNINSTALL_KDUMP = $(sbindir)/kdump

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#
# The name for the init script is correct. kexec-tools is no name
# for an init script.
addFilter(".*incoherent-init-script-name.*");
#
# $null is a valid dependency.
addFilter(".*init-script-undefined-dependency.*");
#
# It does not make any sense to stop the "service" kexec on removal.
# kexec is no service but an init script to run kexec when rebooting.
# Stopping it here would lead to a very unexpected behaviour on reboot. :)
addFilter(".*init-script-without-%stop_on_removal-preun.*");
# :mode=python:

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From: Petr Tesarik <petr@tesarici.cz>
Date: Thu, 5 Apr 2018 10:57:05 +0200
Subject: Revert "kexec-tools: Read always one vmcoreinfo file"
References: bsc#1085626, bsc#951740
Upstream: not yet, upstream wants to stay broken
This reverts commit 455d79f57e9367e5c59093fd74798905bd5762fc.
The explanation seems bogus. The file under /sys/kernel
refers to the Linux kernel VMCOREINFO note, while the
file under /sys/hypervisor refers to the Xen hypervisor
VMCOREINFO_XEN note. The former note contains information
about the Linux kernel. The latter contains information
about the Xen hypervisor. Both are needed to allow page
filtering in makedumpfile.
Signed-off-by: Petr Tesarik <ptesarik@suse.cz>
---
kexec/crashdump-elf.c | 33 ++++++++++++++++++++++++++-------
1 file changed, 26 insertions(+), 7 deletions(-)
--- a/kexec/crashdump-elf.c
+++ b/kexec/crashdump-elf.c
@@ -40,6 +40,8 @@ int FUNC(struct kexec_info *info,
uint64_t notes_addr, notes_len;
uint64_t vmcoreinfo_addr, vmcoreinfo_len;
int has_vmcoreinfo = 0;
+ uint64_t vmcoreinfo_addr_xen, vmcoreinfo_len_xen;
+ int has_vmcoreinfo_xen = 0;
int (*get_note_info)(int cpu, uint64_t *addr, uint64_t *len);
long int count_cpu;
@@ -52,14 +54,16 @@ int FUNC(struct kexec_info *info,
return -1;
}
- if (xen_present()) {
- if (!get_xen_vmcoreinfo(&vmcoreinfo_addr, &vmcoreinfo_len))
- has_vmcoreinfo = 1;
- } else
- if (!get_kernel_vmcoreinfo(&vmcoreinfo_addr, &vmcoreinfo_len))
- has_vmcoreinfo = 1;
+ if (get_kernel_vmcoreinfo(&vmcoreinfo_addr, &vmcoreinfo_len) == 0) {
+ has_vmcoreinfo = 1;
+ }
+
+ if (xen_present() &&
+ get_xen_vmcoreinfo(&vmcoreinfo_addr_xen, &vmcoreinfo_len_xen) == 0) {
+ has_vmcoreinfo_xen = 1;
+ }
- sz = sizeof(EHDR) + (nr_cpus + has_vmcoreinfo) * sizeof(PHDR) +
+ sz = sizeof(EHDR) + (nr_cpus + has_vmcoreinfo + has_vmcoreinfo_xen) * sizeof(PHDR) +
ranges * sizeof(PHDR);
/*
@@ -178,6 +182,21 @@ int FUNC(struct kexec_info *info,
dbgprintf_phdr("vmcoreinfo header", phdr);
}
+ if (has_vmcoreinfo_xen) {
+ phdr = (PHDR *) bufp;
+ bufp += sizeof(PHDR);
+ phdr->p_type = PT_NOTE;
+ phdr->p_flags = 0;
+ phdr->p_offset = phdr->p_paddr = vmcoreinfo_addr_xen;
+ phdr->p_vaddr = 0;
+ phdr->p_filesz = phdr->p_memsz = vmcoreinfo_len_xen;
+ /* Do we need any alignment of segments? */
+ phdr->p_align = 0;
+
+ (elf->e_phnum)++;
+ dbgprintf_phdr("vmcoreinfo_xen header", phdr);
+ }
+
/* Setup an PT_LOAD type program header for the region where
* Kernel is mapped if elf_info->kern_size is non-zero.
*/

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#
# spec file for package kexec-tools
#
# Copyright (c) 2023 SUSE LLC
#
# All modifications and additions to the file contributed by third parties
# remain the property of their copyright owners, unless otherwise agreed
# upon. The license for this file, and modifications and additions to the
# file, is the same license as for the pristine package itself (unless the
# license for the pristine package is not an Open Source License, in which
# case the license is the MIT License). An "Open Source License" is a
# license that conforms to the Open Source Definition (Version 1.9)
# published by the Open Source Initiative.
# Please submit bugfixes or comments via https://bugs.opensuse.org/
#
# Temporarily bump version to aid package split
Name: kexec-tools
Version: 2.0.27
Release: 0
Summary: Tools for loading replacement kernels into memory
License: GPL-2.0-or-later
Group: System/Kernel
URL: https://projects.horms.net/projects/kexec/
Source: https://kernel.org/pub/linux/utils/kernel/kexec/%{name}-%{version}.tar.xz
Source1: https://kernel.org/pub/linux/utils/kernel/kexec/%{name}-%{version}.tar.sign
Source2: kexec-tools.keyring
Source3: kexec-load.service
Source4: %{name}-rpmlintrc
Patch0: 6419b008fde783fd0cc2cc266bd1c9cf35e99a0e.patch
Patch3: %{name}-disable-test.patch
Patch4: %{name}-vmcoreinfo-in-xen.patch
# https://patchwork.kernel.org/project/linux-riscv/patch/20190416123233.4779-1-mick@ics.forth.gr/
Patch5: %{name}-riscv64.patch
Patch10: %{name}-SYS_getrandom.patch
Patch11: kexec-dont-use-kexec_file_load-on-xen.patch
BuildRequires: autoconf
BuildRequires: automake
BuildRequires: systemd-rpm-macros
BuildRequires: zlib-devel
#!BuildIgnore: fop
#!BuildIgnore: gcc-PIE
Requires: perl-Bootloader >= 1.6
Requires(post): suse-module-tools
Requires(postun):suse-module-tools
%{?systemd_requires}
%if 0%{?suse_version} == 1600
# No Xen
%else
%ifarch x86_64
BuildRequires: pkgconfig
BuildRequires: xen-devel
%endif
%endif
%description
Kexec is a user space utility for loading another kernel and asking the
currently running kernel to do something with it. A currently running
kernel may be asked to start the loaded kernel on reboot, or to start
the loaded kernel after it panics.
%prep
%setup -q -n %{name}-%{version}
%autopatch -p1
%build
autoreconf -fvi
export CFLAGS="%{optflags} -fPIC"
export BUILD_CFLAGS="%{optflags}"
export LDFLAGS="-pie"
%configure
%make_build
%install
%make_install
mkdir -p %{buildroot}/%{_unitdir}
install -m644 %{SOURCE3} %{buildroot}/%{_unitdir}
mkdir -p %{buildroot}/%{_sbindir}
ln -s service %{buildroot}%{_sbindir}/rckexec-load
%if 0%{?suse_version} < 1550
mkdir -p %{buildroot}/sbin
ln -s %{_sbindir}/kexec %{buildroot}/sbin
%endif
%post
%service_add_post kexec-load.service
%{?regenerate_initrd_post}
%postun
%service_del_postun kexec-load.service
%{?regenerate_initrd_post}
%pre
%service_add_pre kexec-load.service
%preun
%service_del_preun kexec-load.service
%posttrans
%{?regenerate_initrd_posttrans}
# Compatibility cruft
# there is no %license prior to SLE12
%if %{undefined _defaultlicensedir}
%define license %doc
%else
# filesystem before SLE12 SP3 lacks /usr/share/licenses
%if 0%(test ! -d %{_defaultlicensedir} && echo 1)
%define _defaultlicensedir %{_defaultdocdir}
%endif
%endif
# End of compatibility cruft
%files
%license COPYING
%doc AUTHORS News TODO doc
%{_mandir}/man*/*
%if 0%{?suse_version} < 1550
/sbin/kexec
%endif
%{_sbindir}/rckexec-load
%{_sbindir}/kexec
%{_sbindir}/vmcore-dmesg
%{_unitdir}/kexec-load.service
%changelog