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From: Pavel Tatashin <soleen@gmail.com>
Date: Thu, 4 Jan 2018 11:38:25 -0500
Message-ID: <CAOAebxs4wiAk--pH0q+-UXAv8BMiSH0n-4Y8WcdPuSaf2BXJOA@mail.gmail.com>
Subject: Re: [PATCH 4.4 00/37] 4.4.110-stable review
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-kernel@vger.kernel.org, torvalds@linux-foundation.org,
        Andrew Morton <akpm@linux-foundation.org>, linux@roeck-us.net,
        shuahkh@osg.samsung.com, patches@kernelci.org,
        ben.hutchings@codethink.co.uk, lkft-triage@lists.linaro.org,
        stable@vger.kernel.org
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I am getting the following panic when trying to boot 4.4.110rc1 on
Intel(R) Xeon(R) CPU E5-2630:

[    5.923489] BUG: unable to handle kernel NULL pointer dereference
at 000000000000000d
[    5.932259] IP: [<ffffffff810e70d2>] dyntick_save_progress_counter+0x12/0x50
[    5.940142] PGD 0
[    5.942400] Oops: 0002 [#1] SMP
[    5.946023] Modules linked in:
[    5.949448] CPU: 5 PID: 8 Comm: rcu_sched Not tainted
4.4.110-rc1_pt_linux-4.4.110rc1 #1
[    5.958484] Hardware name: Oracle Corporation ORACLE SERVER
X6-2/ASM,MOTHERBOARD,1U, BIOS 38050100 08/30/2016
[    5.969552] task: ffff881ff2f1ab00 ti: ffff881ff2f24000 task.ti:
ffff881ff2f24000
[    5.977905] RIP: 0010:[<ffffffff810e70d2>]  [<ffffffff810e70d2>]
dyntick_save_progress_counter+0x12/0x50
[    5.988505] RSP: 0000:ffff881ff2f27dc0  EFLAGS: 00010046
[    5.994434] RAX: 0000000000000001 RBX: ffffffff81b02140 RCX: ffff883fec768000
[    6.002403] RDX: 0000000000000000 RSI: ffff881ff2f27e5f RDI: ffff88407e958140
[    6.010368] RBP: ffff881ff2f27dc0 R08: ffff881ff2f27e78 R09: 000000016110f359
[    6.018333] R10: 0000000000000b10 R11: 0000000000000000 R12: ffffffff81b02140
[    6.026297] R13: 00000000ffffffdf R14: 0000000000000021 R15: 0000000200000000
[    6.034262] FS:  0000000000000000(0000) GS:ffff881fff940000(0000)
knlGS:0000000000000000
[    6.043293] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    6.049707] CR2: 000000000000000d CR3: 0000000001aa6000 CR4: 0000000000360670
[    6.057672] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    6.065638] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[    6.073603] Stack:
[    6.075847]  ffff881ff2f27e18 ffffffff810e8fac 0000000000000202
ffff881ff2f27e60
[    6.084158]  ffff881ff2f27e5f ffffffff810e70c0 ffffffff81b02140
ffffffff81b127a0
[    6.092465]  0000000000000001 0000000000000000 0000000000000003
ffff881ff2f27eb8
[    6.100768] Call Trace:
[    6.103501]  [<ffffffff810e8fac>] force_qs_rnp+0xdc/0x150
[    6.109527]  [<ffffffff810e70c0>] ? rcu_start_gp+0x70/0x70
[    6.115654]  [<ffffffff810ea118>] rcu_gp_kthread+0x468/0x9b0
[    6.121976]  [<ffffffff810c9190>] ? prepare_to_wait_event+0xf0/0xf0
[    6.128973]  [<ffffffff810e9cb0>] ? rcu_process_callbacks+0x5f0/0x5f0
[    6.136167]  [<ffffffff810a4a25>] kthread+0xe5/0x100
[    6.141710]  [<ffffffff810a4940>] ? kthread_park+0x60/0x60
[    6.147840]  [<ffffffff81714e8f>] ret_from_fork+0x3f/0x70
[    6.153868]  [<ffffffff810a4940>] ? kthread_park+0x60/0x60

I tried to bisect the problem, but when I try to boot only with:
"KAISER: Kernel Address Isolation" machine hangs during boot and
reboots without any panic message.

4.4.109 boots fine
4.9.75rc1 also boots fine.

Thank you,
Pavel

On Wed, Jan 3, 2018 at 3:11 PM, Greg Kroah-Hartman
<gregkh@linuxfoundation.org> wrote:
> This is the start of the stable review cycle for the 4.4.110 release.
> There are 37 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Fri Jan  5 19:50:38 UTC 2018.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
>         kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.4.110-rc1.gz
> or in the git tree and branch at:
>   git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.4.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h
>
> -------------
> Pseudo-Shortlog of commits:
>
> Greg Kroah-Hartman <gregkh@linuxfoundation.org>
>     Linux 4.4.110-rc1
>
> Kees Cook <keescook@chromium.org>
>     KPTI: Report when enabled
>
> Kees Cook <keescook@chromium.org>
>     KPTI: Rename to PAGE_TABLE_ISOLATION
>
> Borislav Petkov <bp@suse.de>
>     x86/kaiser: Move feature detection up
>
> Jiri Kosina <jkosina@suse.cz>
>     kaiser: disabled on Xen PV
>
> Borislav Petkov <bp@suse.de>
>     x86/kaiser: Reenable PARAVIRT
>
> Thomas Gleixner <tglx@linutronix.de>
>     x86/paravirt: Dont patch flush_tlb_single
>
> Hugh Dickins <hughd@google.com>
>     kaiser: kaiser_flush_tlb_on_return_to_user() check PCID
>
> Hugh Dickins <hughd@google.com>
>     kaiser: asm/tlbflush.h handle noPGE at lower level
>
> Hugh Dickins <hughd@google.com>
>     kaiser: drop is_atomic arg to kaiser_pagetable_walk()
>
> Hugh Dickins <hughd@google.com>
>     kaiser: use ALTERNATIVE instead of x86_cr3_pcid_noflush
>
> Borislav Petkov <bp@suse.de>
>     x86/kaiser: Check boottime cmdline params
>
> Borislav Petkov <bp@suse.de>
>     x86/kaiser: Rename and simplify X86_FEATURE_KAISER handling
>
> Hugh Dickins <hughd@google.com>
>     kaiser: add "nokaiser" boot option, using ALTERNATIVE
>
> Hugh Dickins <hughd@google.com>
>     kaiser: fix unlikely error in alloc_ldt_struct()
>
> Hugh Dickins <hughd@google.com>
>     kaiser: _pgd_alloc() without __GFP_REPEAT to avoid stalls
>
> Hugh Dickins <hughd@google.com>
>     kaiser: paranoid_entry pass cr3 need to paranoid_exit
>
> Hugh Dickins <hughd@google.com>
>     kaiser: x86_cr3_pcid_noflush and x86_cr3_pcid_user
>
> Hugh Dickins <hughd@google.com>
>     kaiser: PCID 0 for kernel and 128 for user
>
> Hugh Dickins <hughd@google.com>
>     kaiser: load_new_mm_cr3() let SWITCH_USER_CR3 flush user
>
> Dave Hansen <dave.hansen@linux.intel.com>
>     kaiser: enhanced by kernel and user PCIDs
>
> Hugh Dickins <hughd@google.com>
>     kaiser: vmstat show NR_KAISERTABLE as nr_overhead
>
> Hugh Dickins <hughd@google.com>
>     kaiser: delete KAISER_REAL_SWITCH option
>
> Hugh Dickins <hughd@google.com>
>     kaiser: name that 0x1000 KAISER_SHADOW_PGD_OFFSET
>
> Hugh Dickins <hughd@google.com>
>     kaiser: cleanups while trying for gold link
>
> Hugh Dickins <hughd@google.com>
>     kaiser: kaiser_remove_mapping() move along the pgd
>
> Hugh Dickins <hughd@google.com>
>     kaiser: tidied up kaiser_add/remove_mapping slightly
>
> Hugh Dickins <hughd@google.com>
>     kaiser: tidied up asm/kaiser.h somewhat
>
> Hugh Dickins <hughd@google.com>
>     kaiser: ENOMEM if kaiser_pagetable_walk() NULL
>
> Hugh Dickins <hughd@google.com>
>     kaiser: fix perf crashes
>
> Hugh Dickins <hughd@google.com>
>     kaiser: fix regs to do_nmi() ifndef CONFIG_KAISER
>
> Hugh Dickins <hughd@google.com>
>     kaiser: KAISER depends on SMP
>
> Hugh Dickins <hughd@google.com>
>     kaiser: fix build and FIXME in alloc_ldt_struct()
>
> Hugh Dickins <hughd@google.com>
>     kaiser: stack map PAGE_SIZE at THREAD_SIZE-PAGE_SIZE
>
> Hugh Dickins <hughd@google.com>
>     kaiser: do not set _PAGE_NX on pgd_none
>
> Dave Hansen <dave.hansen@linux.intel.com>
>     kaiser: merged update
>
> Richard Fellner <richard.fellner@student.tugraz.at>
>     KAISER: Kernel Address Isolation
>
> Tom Lendacky <thomas.lendacky@amd.com>
>     x86/boot: Add early cmdline parsing for options with arguments
>
>
> -------------
>
> Diffstat:
>
>  Documentation/kernel-parameters.txt         |   8 +
>  Makefile                                    |   4 +-
>  arch/x86/boot/compressed/misc.h             |   1 +
>  arch/x86/entry/entry_64.S                   | 164 ++++++++--
>  arch/x86/entry/entry_64_compat.S            |   7 +
>  arch/x86/include/asm/cmdline.h              |   2 +
>  arch/x86/include/asm/cpufeature.h           |   4 +
>  arch/x86/include/asm/desc.h                 |   2 +-
>  arch/x86/include/asm/hw_irq.h               |   2 +-
>  arch/x86/include/asm/kaiser.h               | 141 +++++++++
>  arch/x86/include/asm/pgtable.h              |  28 +-
>  arch/x86/include/asm/pgtable_64.h           |  25 +-
>  arch/x86/include/asm/pgtable_types.h        |  29 +-
>  arch/x86/include/asm/processor.h            |   2 +-
>  arch/x86/include/asm/tlbflush.h             |  74 ++++-
>  arch/x86/include/uapi/asm/processor-flags.h |   3 +-
>  arch/x86/kernel/cpu/common.c                |  28 +-
>  arch/x86/kernel/cpu/perf_event_intel_ds.c   |  57 +++-
>  arch/x86/kernel/espfix_64.c                 |  10 +
>  arch/x86/kernel/head_64.S                   |  35 ++-
>  arch/x86/kernel/irqinit.c                   |   2 +-
>  arch/x86/kernel/ldt.c                       |  25 +-
>  arch/x86/kernel/paravirt_patch_64.c         |   2 -
>  arch/x86/kernel/process.c                   |   2 +-
>  arch/x86/kernel/setup.c                     |   7 +
>  arch/x86/kernel/tracepoint.c                |   2 +
>  arch/x86/kvm/x86.c                          |   3 +-
>  arch/x86/lib/cmdline.c                      | 105 +++++++
>  arch/x86/mm/Makefile                        |   1 +
>  arch/x86/mm/init.c                          |   2 +-
>  arch/x86/mm/init_64.c                       |  10 +
>  arch/x86/mm/kaiser.c                        | 455 ++++++++++++++++++++++++++++
>  arch/x86/mm/pageattr.c                      |  63 +++-
>  arch/x86/mm/pgtable.c                       |  16 +-
>  arch/x86/mm/tlb.c                           |  39 ++-
>  include/asm-generic/vmlinux.lds.h           |   7 +
>  include/linux/kaiser.h                      |  52 ++++
>  include/linux/mmzone.h                      |   3 +-
>  include/linux/percpu-defs.h                 |  32 +-
>  init/main.c                                 |   2 +
>  kernel/fork.c                               |   6 +
>  mm/vmstat.c                                 |   1 +
>  security/Kconfig                            |  10 +
>  43 files changed, 1375 insertions(+), 98 deletions(-)
>
>



-- 
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