This is a note to let you know that I've just added the patch titled
selftests/x86: Disable tests requiring 32-bit support on pure 64-bit systems
to the 4.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
selftests-x86-disable-tests-requiring-32-bit-support-on-pure-64-bit-systems.patch
and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 9279ddf23ce78ff2676e8e8e19fec0f022c26d04 Mon Sep 17 00:00:00 2001
From: Dominik Brodowski <linux@xxxxxxxxxxxxxxxxxxxx>
Date: Tue, 13 Feb 2018 09:15:19 +0100
Subject: selftests/x86: Disable tests requiring 32-bit support on pure 64-bit systems
From: Dominik Brodowski <linux@xxxxxxxxxxxxxxxxxxxx>
commit 9279ddf23ce78ff2676e8e8e19fec0f022c26d04 upstream.
The ldt_gdt and ptrace_syscall selftests, even in their 64-bit variant, use
hard-coded 32-bit syscall numbers and call "int $0x80".
This will fail on 64-bit systems with CONFIG_IA32_EMULATION=y disabled.
Therefore, do not build these tests if we cannot build 32-bit binaries
(which should be a good approximation for CONFIG_IA32_EMULATION=y being enabled).
Signed-off-by: Dominik Brodowski <linux@xxxxxxxxxxxxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Dmitry Safonov <dsafonov@xxxxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: linux-kselftest@xxxxxxxxxxxxxxx
Cc: shuah@xxxxxxxxxx
Link: http://lkml.kernel.org/r/20180211111013.16888-6-linux@xxxxxxxxxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/x86/Makefile | 20 +++++++++++++-------
1 file changed, 13 insertions(+), 7 deletions(-)
--- a/tools/testing/selftests/x86/Makefile
+++ b/tools/testing/selftests/x86/Makefile
@@ -5,16 +5,26 @@ include ../lib.mk
.PHONY: all all_32 all_64 warn_32bit_failure clean
-TARGETS_C_BOTHBITS := single_step_syscall sysret_ss_attrs syscall_nt ptrace_syscall test_mremap_vdso \
- check_initial_reg_state sigreturn ldt_gdt iopl mpx-mini-test ioperm \
+UNAME_M := $(shell uname -m)
+CAN_BUILD_I386 := $(shell ./check_cc.sh $(CC) trivial_32bit_program.c -m32)
+CAN_BUILD_X86_64 := $(shell ./check_cc.sh $(CC) trivial_64bit_program.c)
+
+TARGETS_C_BOTHBITS := single_step_syscall sysret_ss_attrs syscall_nt test_mremap_vdso \
+ check_initial_reg_state sigreturn iopl mpx-mini-test ioperm \
protection_keys test_vdso test_vsyscall
TARGETS_C_32BIT_ONLY := entry_from_vm86 syscall_arg_fault test_syscall_vdso unwind_vdso \
test_FCMOV test_FCOMI test_FISTTP \
vdso_restorer
TARGETS_C_64BIT_ONLY := fsgsbase sysret_rip
+# Some selftests require 32bit support enabled also on 64bit systems
+TARGETS_C_32BIT_NEEDED := ldt_gdt ptrace_syscall
-TARGETS_C_32BIT_ALL := $(TARGETS_C_BOTHBITS) $(TARGETS_C_32BIT_ONLY)
+TARGETS_C_32BIT_ALL := $(TARGETS_C_BOTHBITS) $(TARGETS_C_32BIT_ONLY) $(TARGETS_C_32BIT_NEEDED)
TARGETS_C_64BIT_ALL := $(TARGETS_C_BOTHBITS) $(TARGETS_C_64BIT_ONLY)
+ifeq ($(CAN_BUILD_I386)$(CAN_BUILD_X86_64),11)
+TARGETS_C_64BIT_ALL += $(TARGETS_C_32BIT_NEEDED)
+endif
+
BINARIES_32 := $(TARGETS_C_32BIT_ALL:%=%_32)
BINARIES_64 := $(TARGETS_C_64BIT_ALL:%=%_64)
@@ -23,10 +33,6 @@ BINARIES_64 := $(patsubst %,$(OUTPUT)/%,
CFLAGS := -O2 -g -std=gnu99 -pthread -Wall -no-pie
-UNAME_M := $(shell uname -m)
-CAN_BUILD_I386 := $(shell ./check_cc.sh $(CC) trivial_32bit_program.c -m32)
-CAN_BUILD_X86_64 := $(shell ./check_cc.sh $(CC) trivial_64bit_program.c)
-
ifeq ($(CAN_BUILD_I386),1)
all: all_32
TEST_PROGS += $(BINARIES_32)
Patches currently in stable-queue which might be from linux@xxxxxxxxxxxxxxxxxxxx are
queue-4.14/x86-entry-64-interleave-xor-register-clearing-with-push-instructions.patch
queue-4.14/x86-entry-64-merge-the-pop_c_regs-and-pop_extra_regs-macros-into-a-single-pop_regs-macro.patch
queue-4.14/x86-entry-64-remove-the-unused-icebp-macro.patch
queue-4.14/x86-entry-64-use-push_and_clean_regs-in-more-cases.patch
queue-4.14/selftests-x86-disable-tests-requiring-32-bit-support-on-pure-64-bit-systems.patch
queue-4.14/x86-entry-64-fix-paranoid_entry-frame-pointer-warning.patch
queue-4.14/x86-entry-64-merge-save_c_regs-and-save_extra_regs-remove-unused-extensions.patch
queue-4.14/selftests-x86-do-not-rely-on-int-0x80-in-single_step_syscall.c.patch
queue-4.14/selftests-x86-fix-vdso-selftest-segfault-for-vsyscall-none.patch
queue-4.14/x86-entry-64-indent-push_and_clear_regs-and-pop_regs-properly.patch
queue-4.14/selftests-x86-clean-up-and-document-sscanf-usage.patch
queue-4.14/selftests-x86-do-not-rely-on-int-0x80-in-test_mremap_vdso.c.patch
queue-4.14/x86-entry-64-get-rid-of-the-alloc_pt_gpregs_on_stack-and-save_and_clear_regs-macros.patch
queue-4.14/x86-entry-64-introduce-the-push_and_clean_regs-macro.patch