This is a note to let you know that I've just added the patch titled
x86/xen: Fix initialisation in hypercall_page after rethunk
to the 5.10-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:
x86-xen-fix-initialisation-in-hypercall_page-after-rethunk.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Thu Jul 14 10:26:50 AM CEST 2022
Date: Thu, 14 Jul 2022 00:50:16 +0200
To: Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx>
From: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
Date: Thu, 14 Jul 2022 00:39:33 +0200
Subject: x86/xen: Fix initialisation in hypercall_page after rethunk
From: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
The hypercall_page is special and the RETs there should not be changed
into rethunk calls (but can have SLS mitigation). Change the initial
instructions to ret + int3 padding, as was done in upstream commit
5b2fc51576ef "x86/ibt,xen: Sprinkle the ENDBR".
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/xen/xen-head.S | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/arch/x86/xen/xen-head.S
+++ b/arch/x86/xen/xen-head.S
@@ -69,9 +69,9 @@ SYM_CODE_END(asm_cpu_bringup_and_idle)
SYM_CODE_START(hypercall_page)
.rept (PAGE_SIZE / 32)
UNWIND_HINT_FUNC
- .skip 31, 0x90
ANNOTATE_UNRET_SAFE
- RET
+ ret
+ .skip 31, 0xcc
.endr
#define HYPERCALL(n) \
Patches currently in stable-queue which might be from gregkh@xxxxxxxxxxxxxxxxxxx are
queue-5.10/objtool-cache-instruction-relocs.patch
queue-5.10/x86-alternative-merge-include-files.patch
queue-5.10/makefile-set-retpoline-cflags-based-on-config_cc_is_-clang-gcc.patch
queue-5.10/x86-sev-avoid-using-__x86_return_thunk.patch
queue-5.10/objtool-add-elf_create_undef_symbol.patch
queue-5.10/x86-ftrace-use-alternative-ret-encoding.patch
queue-5.10/objtool-re-add-unwind_hint_-save_restore.patch
queue-5.10/x86-bugs-add-retbleed-ibpb.patch
queue-5.10/x86-kexec-disable-ret-on-kexec.patch
queue-5.10/x86-bugs-enable-stibp-for-jmp2ret.patch
queue-5.10/x86-retpoline-cleanup-some-ifdefery.patch
queue-5.10/objtool-handle-__sanitize_cov-tail-calls.patch
queue-5.10/objtool-assume-only-elf-functions-do-sibling-calls.patch
queue-5.10/x86-prepare-asm-files-for-straight-line-speculation.patch
queue-5.10/x86-speculation-disable-rrsba-behavior.patch
queue-5.10/kvm-vmx-flatten-__vmx_vcpu_run.patch
queue-5.10/objtool-support-retpoline-jump-detection-for-vmlinux.o.patch
queue-5.10/x86-xen-support-objtool-vmlinux.o-validation-in-xen-head.s.patch
queue-5.10/x86-kvm-vmx-make-noinstr-clean.patch
queue-5.10/x86-static_call-serialize-__static_call_fixup-properly.patch
queue-5.10/objtool-x86-replace-alternatives-with-.retpoline_sites.patch
queue-5.10/objtool-skip-magical-retpoline-.altinstr_replacement.patch
queue-5.10/x86-retbleed-add-fine-grained-kconfig-knobs.patch
queue-5.10/x86-cpu-amd-add-spectral-chicken.patch
queue-5.10/objtool-add-straight-line-speculation-validation.patch
queue-5.10/kvm-vmx-fix-ibrs-handling-after-vmexit.patch
queue-5.10/kvm-vmx-prevent-guest-rsb-poisoning-attacks-with-eibrs.patch
queue-5.10/x86-vsyscall_emu-64-don-t-use-ret-in-vsyscall-emulation.patch
queue-5.10/kvm-nvmx-use-__vmx_vcpu_run-in-nested_vmx_check_vmentry_hw.patch
queue-5.10/objtool-skip-non-text-sections-when-adding-return-thunk-sites.patch
queue-5.10/objtool-don-t-make-.altinstructions-writable.patch
queue-5.10/x86-bugs-do-ibpb-fallback-check-only-once.patch
queue-5.10/x86-alternative-support-not-feature.patch
queue-5.10/x86-kvm-use-proper-asm-macros-for-kvm_vcpu_is_preempted.patch
queue-5.10/tools-arch-update-arch-x86-lib-mem-cpy-set-_64.s-copies-used-in-perf-bench-mem-memcpy.patch
queue-5.10/x86-add-straight-line-speculation-mitigation.patch
queue-5.10/x86-add-magic-amd-return-thunk.patch
queue-5.10/x86-bugs-keep-a-per-cpu-ia32_spec_ctrl-value.patch
queue-5.10/x86-alternatives-optimize-optimize_nops.patch
queue-5.10/x86-objtool-create-.return_sites.patch
queue-5.10/crypto-x86-poly1305-fixup-sls.patch
queue-5.10/x86-alternative-handle-jcc-__x86_indirect_thunk_-reg.patch
queue-5.10/x86-alternative-use-insn_decode.patch
queue-5.10/x86-kvm-fix-setcc-emulation-for-return-thunks.patch
queue-5.10/objtool-fix-objtool-regression-on-x32-systems.patch
queue-5.10/x86-cpu-amd-enumerate-btc_no.patch
queue-5.10/x86-alternative-relax-text_poke_bp-constraint.patch
queue-5.10/x86-retpoline-swizzle-retpoline-thunk.patch
queue-5.10/objtool-rework-the-elf_rebuild_reloc_section-logic.patch
queue-5.10/x86-speculation-fix-firmware-entry-spec_ctrl-handling.patch
queue-5.10/x86-xen-support-objtool-validation-in-xen-asm.s.patch
queue-5.10/x86-retpoline-remove-unused-replacement-symbols.patch
queue-5.10/objtool-support-stack-layout-changes-in-alternatives.patch
queue-5.10/objtool-fix-symbol-creation.patch
queue-5.10/x86-speculation-add-spectre_v2-ibrs-option-to-support-kernel-ibrs.patch
queue-5.10/bpf-x86-respect-x86_feature_retpoline.patch
queue-5.10/objtool-fix-type-of-reloc-addend.patch
queue-5.10/objtool-x86-rewrite-retpoline-thunk-calls.patch
queue-5.10/x86-undo-return-thunk-damage.patch
queue-5.10/x86-prepare-inline-asm-for-straight-line-speculation.patch
queue-5.10/x86-alternative-support-alternative_ternary.patch
queue-5.10/x86-speculation-remove-x86_spec_ctrl_mask.patch
queue-5.10/kvm-emulate-fix-setcc-emulation-function-offsets-with-sls.patch
queue-5.10/x86-bugs-add-cannon-lake-to-retbleed-affected-cpu-list.patch
queue-5.10/objtool-handle-per-arch-retpoline-naming.patch
queue-5.10/x86-retpoline-create-a-retpoline-thunk-array.patch
queue-5.10/x86-retpoline-simplify-retpolines.patch
queue-5.10/x86-asm-fix-register-order.patch
queue-5.10/x86-speculation-fill-rsb-on-vmexit-for-ibrs.patch
queue-5.10/x86-realmode-build-with-d__disable_exports.patch
queue-5.10/objtool-add-entry-unret-validation.patch
queue-5.10/x86-alternative-use-alternative_ternary-in-_static_cpu_has.patch
queue-5.10/x86-add-insn_decode_kernel.patch
queue-5.10/x86-insn-rename-insn_decode-to-insn_decode_from_regs.patch
queue-5.10/objtool-keep-track-of-retpoline-call-sites.patch
queue-5.10/kvm-vmx-convert-launched-argument-to-flags.patch
queue-5.10/objtool-add-elf_create_reloc-helper.patch
queue-5.10/objtool-make-.altinstructions-section-entry-size-consistent.patch
queue-5.10/x86-bpf-use-alternative-ret-encoding.patch
queue-5.10/x86-common-stamp-out-the-stepping-madness.patch
queue-5.10/x86-bugs-split-spectre_v2_select_mitigation-and-spectre_v2_user_select_mitigation.patch
queue-5.10/x86-xen-fix-initialisation-in-hypercall_page-after-rethunk.patch
queue-5.10/x86-bugs-report-intel-retbleed-vulnerability.patch
queue-5.10/bpf-x86-simplify-computing-label-offsets.patch
queue-5.10/x86-cpufeatures-move-retpoline-flags-to-word-11.patch
queue-5.10/x86-speculation-fix-spec_ctrl-write-on-smt-state-change.patch
queue-5.10/x86-retpoline-use-mfunction-return.patch
queue-5.10/objtool-refactor-orc-section-generation.patch
queue-5.10/x86-xen-rename-sys-entry-points.patch
queue-5.10/kvm-vmx-use-test-reg-reg-instead-of-cmp-0-reg-in-vmenter.s.patch
queue-5.10/objtool-only-rewrite-unconditional-retpoline-thunk-calls.patch
queue-5.10/x86-bugs-optimize-spec_ctrl-msr-writes.patch
queue-5.10/x86-bugs-do-not-enable-ibpb-on-entry-when-ibpb-is-not-supported.patch
queue-5.10/x86-alternative-optimize-single-byte-nops-at-an-arbitrary-position.patch
queue-5.10/objtool-fix-code-relocs-vs-weak-symbols.patch
queue-5.10/x86-bugs-report-amd-retbleed-vulnerability.patch
queue-5.10/objtool-combine-unwind_hint_ret_offset-and-unwind_hint_func.patch
queue-5.10/x86-static_call-use-alternative-ret-encoding.patch
queue-5.10/x86-speculation-fix-rsb-filling-with-config_retpoline-n.patch
queue-5.10/x86-asm-fixup-odd-gen-for-each-reg.h-usage.patch
queue-5.10/x86-alternative-add-debug-prints-to-apply_retpolines.patch
queue-5.10/objtool-extract-elf_symbol_add.patch
queue-5.10/x86-insn-add-an-insn_decode-api.patch
queue-5.10/objtool-print-out-the-symbol-type-when-complaining-about-it.patch
queue-5.10/x86-use-return-thunk-in-asm-code.patch
queue-5.10/objtool-remove-reloc-symbol-type-checks-in-get_alt_entry.patch
queue-5.10/objtool-classify-symbols.patch
queue-5.10/intel_idle-disable-ibrs-during-long-idle.patch
queue-5.10/objtool-correctly-handle-retpoline-thunk-calls.patch
queue-5.10/objtool-fix-.symtab_shndx-handling-for-elf_create_undef_symbol.patch
queue-5.10/objtool-add-alt_group-struct.patch
queue-5.10/x86-retpoline-move-the-retpoline-thunk-declarations-to-nospec-branch.h.patch
queue-5.10/objtool-support-asm-jump-tables.patch
queue-5.10/x86-alternative-implement-.retpoline_sites-support.patch
queue-5.10/objtool-x86-ignore-__x86_indirect_alt_-symbols.patch
queue-5.10/tools-insn-restore-the-relative-include-paths-for-cross-building.patch
queue-5.10/objtool-fix-sls-validation-for-kcov-tail-call-replacement.patch
queue-5.10/x86-alternative-try-inline-spectre_v2-retpoline-amd.patch
queue-5.10/x86-entry-remove-skip_r11rcx.patch
queue-5.10/objtool-explicitly-avoid-self-modifying-code-in-.altinstr_replacement.patch
queue-5.10/x86-speculation-use-cached-host-spec_ctrl-value-for-guest-entry-exit.patch
queue-5.10/x86-bugs-add-amd-retbleed-boot-parameter.patch
queue-5.10/objtool-create-reloc-sections-implicitly.patch
queue-5.10/x86-entry-add-kernel-ibrs-implementation.patch
queue-5.10/objtool-treat-.text.__x86.-as-noinstr.patch
queue-5.10/x86-lib-atomic64_386_32-rename-things.patch
queue-5.10/objtool-introduce-cfi-hash.patch
queue-5.10/objtool-default-ignore-int3-for-unreachable.patch
queue-5.10/objtool-extract-elf_strtab_concat.patch
queue-5.10/x86-insn-add-a-__ignore_sync_check__-marker.patch
queue-5.10/objtool-teach-get_alt_entry-about-more-relocation-types.patch
queue-5.10/x86-insn-eval-handle-return-values-from-the-decoder.patch
queue-5.10/objtool-update-retpoline-validation.patch
