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@xxxxxxxxxxxxxxxxxxx> 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@xxxxxxxxxxxxxxxxxxx> > Linux 4.4.110-rc1 > > Kees Cook <keescook@xxxxxxxxxxxx> > KPTI: Report when enabled > > Kees Cook <keescook@xxxxxxxxxxxx> > KPTI: Rename to PAGE_TABLE_ISOLATION > > Borislav Petkov <bp@xxxxxxx> > x86/kaiser: Move feature detection up > > Jiri Kosina <jkosina@xxxxxxx> > kaiser: disabled on Xen PV > > Borislav Petkov <bp@xxxxxxx> > x86/kaiser: Reenable PARAVIRT > > Thomas Gleixner <tglx@xxxxxxxxxxxxx> > x86/paravirt: Dont patch flush_tlb_single > > Hugh Dickins <hughd@xxxxxxxxxx> > kaiser: kaiser_flush_tlb_on_return_to_user() check PCID > > Hugh Dickins <hughd@xxxxxxxxxx> > kaiser: asm/tlbflush.h handle noPGE at lower level > > Hugh Dickins <hughd@xxxxxxxxxx> > kaiser: drop is_atomic arg to kaiser_pagetable_walk() > > Hugh Dickins <hughd@xxxxxxxxxx> > kaiser: use ALTERNATIVE instead of x86_cr3_pcid_noflush > > Borislav Petkov <bp@xxxxxxx> > x86/kaiser: Check boottime cmdline params > > Borislav Petkov <bp@xxxxxxx> > x86/kaiser: Rename and simplify X86_FEATURE_KAISER handling > > Hugh Dickins <hughd@xxxxxxxxxx> > kaiser: add "nokaiser" boot option, using ALTERNATIVE > > Hugh Dickins <hughd@xxxxxxxxxx> > kaiser: fix unlikely error in alloc_ldt_struct() > > Hugh Dickins <hughd@xxxxxxxxxx> > kaiser: _pgd_alloc() without __GFP_REPEAT to avoid stalls > > Hugh Dickins <hughd@xxxxxxxxxx> > kaiser: paranoid_entry pass cr3 need to paranoid_exit > > Hugh Dickins <hughd@xxxxxxxxxx> > kaiser: x86_cr3_pcid_noflush and x86_cr3_pcid_user > > Hugh Dickins <hughd@xxxxxxxxxx> > kaiser: PCID 0 for kernel and 128 for user > > Hugh Dickins <hughd@xxxxxxxxxx> > kaiser: load_new_mm_cr3() let SWITCH_USER_CR3 flush user > > Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx> > kaiser: enhanced by kernel and user PCIDs > > Hugh Dickins <hughd@xxxxxxxxxx> > kaiser: vmstat show NR_KAISERTABLE as nr_overhead > > Hugh Dickins <hughd@xxxxxxxxxx> > kaiser: delete KAISER_REAL_SWITCH option > > Hugh Dickins <hughd@xxxxxxxxxx> > kaiser: name that 0x1000 KAISER_SHADOW_PGD_OFFSET > > Hugh Dickins <hughd@xxxxxxxxxx> > kaiser: cleanups while trying for gold link > > Hugh Dickins <hughd@xxxxxxxxxx> > kaiser: kaiser_remove_mapping() move along the pgd > > Hugh Dickins <hughd@xxxxxxxxxx> > kaiser: tidied up kaiser_add/remove_mapping slightly > > Hugh Dickins <hughd@xxxxxxxxxx> > kaiser: tidied up asm/kaiser.h somewhat > > Hugh Dickins <hughd@xxxxxxxxxx> > kaiser: ENOMEM if kaiser_pagetable_walk() NULL > > Hugh Dickins <hughd@xxxxxxxxxx> > kaiser: fix perf crashes > > Hugh Dickins <hughd@xxxxxxxxxx> > kaiser: fix regs to do_nmi() ifndef CONFIG_KAISER > > Hugh Dickins <hughd@xxxxxxxxxx> > kaiser: KAISER depends on SMP > > Hugh Dickins <hughd@xxxxxxxxxx> > kaiser: fix build and FIXME in alloc_ldt_struct() > > Hugh Dickins <hughd@xxxxxxxxxx> > kaiser: stack map PAGE_SIZE at THREAD_SIZE-PAGE_SIZE > > Hugh Dickins <hughd@xxxxxxxxxx> > kaiser: do not set _PAGE_NX on pgd_none > > Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx> > kaiser: merged update > > Richard Fellner <richard.fellner@xxxxxxxxxxxxxxxxx> > KAISER: Kernel Address Isolation > > Tom Lendacky <thomas.lendacky@xxxxxxx> > 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(-) > > -- Life Is BeAuTifuL :)