From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:53082 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752449AbdL0P2l (ORCPT ); Wed, 27 Dec 2017 10:28:41 -0500 Subject: Patch "arch, mm: Allow arch_dup_mmap() to fail" has been added to the 4.14-stable tree To: tglx@linutronix.de, David.Laight@aculab.com, boris.ostrovsky@oracle.com, bp@alien8.de, bpetkov@suse.de, brgerst@gmail.com, dave.hansen@intel.com, dave.hansen@linux.intel.com, dvlasenk@redhat.com, eduval@amazon.com, gregkh@linuxfoundation.org, hpa@zytor.com, jgross@suse.com, jpoimboe@redhat.com, luto@kernel.org, mingo@kernel.org, peterz@infradead.org, torvalds@linux-foundation.org, will.deacon@arm.com Cc: , From: Date: Wed, 27 Dec 2017 16:25:49 +0100 Message-ID: <1514388349152183@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled arch, mm: Allow arch_dup_mmap() to fail 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: arch-mm-allow-arch_dup_mmap-to-fail.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 know about it. >>From c10e83f598d08046dd1ebc8360d4bb12d802d51b Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Thu, 14 Dec 2017 12:27:29 +0100 Subject: arch, mm: Allow arch_dup_mmap() to fail From: Thomas Gleixner commit c10e83f598d08046dd1ebc8360d4bb12d802d51b upstream. In order to sanitize the LDT initialization on x86 arch_dup_mmap() must be allowed to fail. Fix up all instances. Signed-off-by: Thomas Gleixner Signed-off-by: Peter Zijlstra (Intel) Cc: Andy Lutomirski Cc: Andy Lutomirsky Cc: Boris Ostrovsky Cc: Borislav Petkov Cc: Borislav Petkov Cc: Brian Gerst Cc: Dave Hansen Cc: Dave Hansen Cc: David Laight Cc: Denys Vlasenko Cc: Eduardo Valentin Cc: Greg KH Cc: H. Peter Anvin Cc: Josh Poimboeuf Cc: Juergen Gross Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Will Deacon Cc: aliguori@amazon.com Cc: dan.j.williams@intel.com Cc: hughd@google.com Cc: keescook@google.com Cc: kirill.shutemov@linux.intel.com Cc: linux-mm@kvack.org Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman --- arch/powerpc/include/asm/mmu_context.h | 5 +++-- arch/um/include/asm/mmu_context.h | 3 ++- arch/unicore32/include/asm/mmu_context.h | 5 +++-- arch/x86/include/asm/mmu_context.h | 4 ++-- include/asm-generic/mm_hooks.h | 5 +++-- kernel/fork.c | 3 +-- 6 files changed, 14 insertions(+), 11 deletions(-) --- a/arch/powerpc/include/asm/mmu_context.h +++ b/arch/powerpc/include/asm/mmu_context.h @@ -114,9 +114,10 @@ static inline void enter_lazy_tlb(struct #endif } -static inline void arch_dup_mmap(struct mm_struct *oldmm, - struct mm_struct *mm) +static inline int arch_dup_mmap(struct mm_struct *oldmm, + struct mm_struct *mm) { + return 0; } static inline void arch_exit_mmap(struct mm_struct *mm) --- a/arch/um/include/asm/mmu_context.h +++ b/arch/um/include/asm/mmu_context.h @@ -15,9 +15,10 @@ extern void uml_setup_stubs(struct mm_st /* * Needed since we do not use the asm-generic/mm_hooks.h: */ -static inline void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm) +static inline int arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm) { uml_setup_stubs(mm); + return 0; } extern void arch_exit_mmap(struct mm_struct *mm); static inline void arch_unmap(struct mm_struct *mm, --- a/arch/unicore32/include/asm/mmu_context.h +++ b/arch/unicore32/include/asm/mmu_context.h @@ -81,9 +81,10 @@ do { \ } \ } while (0) -static inline void arch_dup_mmap(struct mm_struct *oldmm, - struct mm_struct *mm) +static inline int arch_dup_mmap(struct mm_struct *oldmm, + struct mm_struct *mm) { + return 0; } static inline void arch_unmap(struct mm_struct *mm, --- a/arch/x86/include/asm/mmu_context.h +++ b/arch/x86/include/asm/mmu_context.h @@ -176,10 +176,10 @@ do { \ } while (0) #endif -static inline void arch_dup_mmap(struct mm_struct *oldmm, - struct mm_struct *mm) +static inline int arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm) { paravirt_arch_dup_mmap(oldmm, mm); + return 0; } static inline void arch_exit_mmap(struct mm_struct *mm) --- a/include/asm-generic/mm_hooks.h +++ b/include/asm-generic/mm_hooks.h @@ -7,9 +7,10 @@ #ifndef _ASM_GENERIC_MM_HOOKS_H #define _ASM_GENERIC_MM_HOOKS_H -static inline void arch_dup_mmap(struct mm_struct *oldmm, - struct mm_struct *mm) +static inline int arch_dup_mmap(struct mm_struct *oldmm, + struct mm_struct *mm) { + return 0; } static inline void arch_exit_mmap(struct mm_struct *mm) --- a/kernel/fork.c +++ b/kernel/fork.c @@ -721,8 +721,7 @@ static __latent_entropy int dup_mmap(str goto out; } /* a new mm has just been created */ - arch_dup_mmap(oldmm, mm); - retval = 0; + retval = arch_dup_mmap(oldmm, mm); out: up_write(&mm->mmap_sem); flush_tlb_mm(oldmm); Patches currently in stable-queue which might be from tglx@linutronix.de are queue-4.14/x86-entry-rename-sysenter_stack-to-cpu_entry_area_entry_stack.patch queue-4.14/x86-mm-put-mmu-to-hardware-asid-translation-in-one-place.patch queue-4.14/x86-vsyscall-64-explicitly-set-_page_user-in-the-pagetable-hierarchy.patch queue-4.14/x86-uv-use-the-right-tlb-flush-api.patch queue-4.14/x86-decoder-fix-and-update-the-opcodes-map.patch queue-4.14/x86-mm-dump_pagetables-check-page_present-for-real.patch queue-4.14/x86-ldt-prevent-ldt-inheritance-on-exec.patch queue-4.14/x86-microcode-dont-abuse-the-tlb-flush-interface.patch queue-4.14/x86-doc-remove-obvious-weirdnesses-from-the-x86-mm-layout-documentation.patch queue-4.14/init-invoke-init_espfix_bsp-from-mm_init.patch queue-4.14/x86-cpu_entry_area-move-it-to-a-separate-unit.patch queue-4.14/x86-vsyscall-64-warn-and-fail-vsyscall-emulation-in-native-mode.patch queue-4.14/x86-mm-create-asm-invpcid.h.patch queue-4.14/x86-cpu_entry_area-prevent-wraparound-in-setup_cpu_entry_area_ptes-on-32bit.patch queue-4.14/x86-mm-remove-superfluous-barriers.patch queue-4.14/x86-ldt-rework-locking.patch queue-4.14/pci-pm-force-devices-to-d0-in-pci_pm_thaw_noirq.patch queue-4.14/arch-mm-allow-arch_dup_mmap-to-fail.patch queue-4.14/x86-cpu_entry_area-move-it-out-of-the-fixmap.patch queue-4.14/tools-headers-sync-objtool-uapi-header.patch queue-4.14/x86-mm-remove-hard-coded-asid-limit-checks.patch queue-4.14/x86-kconfig-limit-nr_cpus-on-32-bit-to-a-sane-amount.patch queue-4.14/objtool-fix-64-bit-build-on-32-bit-host.patch queue-4.14/x86-mm-add-comments-to-clarify-which-tlb-flush-functions-are-supposed-to-flush-what.patch queue-4.14/x86-mm-move-the-cr3-construction-functions-to-tlbflush.h.patch queue-4.14/x86-mm-dump_pagetables-make-the-address-hints-correct-and-readable.patch queue-4.14/x86-insn-eval-add-utility-functions-to-get-segment-selector.patch queue-4.14/objtool-move-synced-files-to-their-original-relative-locations.patch queue-4.14/x86-mm-use-__flush_tlb_one-for-kernel-memory.patch queue-4.14/objtool-move-kernel-headers-code-sync-check-to-a-script.patch queue-4.14/x86-mm-64-improve-the-memory-map-documentation.patch queue-4.14/objtool-fix-cross-build.patch