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SubjectRe: [PATCH 4.18 000/123] 4.18.6-stable review
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On 09/03/18 18:55, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 4.18.6 release.

Unfortunately this is busted. First blamed my custom patches, but as it
turns out a 100% vanilla 4.18.6 build crashes as well. Single-user starts,
but later when starting services and esp. autofs (I think - too much output)
explodes with:

...
Sep 3 20:19:36 ragnarok kernel: IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
Sep 3 20:19:38 ragnarok kernel: BUG: stack guard page was hit at 00000000ab58c99c (stack is 00000000382b9464..00000000d642b9d6)
Sep 3 20:19:38 ragnarok kernel: kernel stack overflow (double-fault): 0000 [#1] SMP
Sep 3 20:19:38 ragnarok kernel: CPU: 4 PID: 3634 Comm: automount Tainted: G O 4.18.6 #1
Sep 3 20:19:38 ragnarok kernel: Hardware name: Gigabyte Technology Co., Ltd. P67-DS3-B3/P67-DS3-B3, BIOS F1 05/06/2011
Sep 3 20:19:38 ragnarok kernel: RIP: 0010:flush_tlb_func_common.constprop.4+0x23/0x260
Sep 3 20:19:38 ragnarok kernel: Code: 0b eb e5 0f 1f 40 00 66 66 66 66 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 f0 48 83 ec 20 65 48 8b 04 25 28 00 00 00 <48> 89 44 24 18 31 c0 65 66 8b 1d 96 fd fc 7e 0f b7 c3 65 48 8b 15
Sep 3 20:19:38 ragnarok kernel: RSP: 0018:ffffc9000326bfe0 EFLAGS: 00010082
Sep 3 20:19:38 ragnarok kernel: RAX: cf0a75e3a0e78e00 RBX: ffff880601006cc0 RCX: 0000000000000000
Sep 3 20:19:38 ragnarok kernel: RDX: 00007fb464e7e000 RSI: 0000000000000003 RDI: ffffc9000326c040
Sep 3 20:19:38 ragnarok kernel: RBP: ffffc9000326c030 R08: 00000005fca490e7 R09: 00000000004fa811
Sep 3 20:19:38 ragnarok kernel: R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000000004
Sep 3 20:19:38 ragnarok kernel: R13: ffff8805fbab7600 R14: ffff880601006cc0 R15: ffff880602dfb540
Sep 3 20:19:38 ragnarok kernel: FS: 00007fb469245240(0000) GS:ffff88061f500000(0000) knlGS:0000000000000000
Sep 3 20:19:38 ragnarok kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Sep 3 20:19:38 ragnarok kernel: CR2: ffffc9000326bfd8 CR3: 00000005feadb001 CR4: 00000000000606e0
Sep 3 20:19:38 ragnarok kernel: Call Trace:
Sep 3 20:19:38 ragnarok kernel: flush_tlb_mm_range+0xff/0x110
Sep 3 20:19:38 ragnarok kernel: ? cpumask_any_but+0x1f/0x40
Sep 3 20:19:38 ragnarok kernel: ? cpumask_any_but+0x1f/0x40
Sep 3 20:19:38 ragnarok kernel: tlb_flush_mmu_tlbonly+0x76/0xc0
Sep 3 20:19:38 ragnarok kernel: tlb_table_flush.part.13+0xe/0x30
Sep 3 20:19:38 ragnarok kernel: tlb_flush_mmu_tlbonly+0x54/0xc0
..a few hundred times..
Sep 3 20:19:38 ragnarok kernel: tlb_table_flush.part.13+0xe/0x30
Sep 3 20:19:38 ragnarok kernel: tlb_flush_mmu_tlbonly+0x54/0xc0
Sep 3 20:19:38 ragnarok kernel: arch_tlb_finish_mmu+0x3a/0x70
Sep 3 20:19:38 ragnarok kernel: tlb_finish_mmu+0x1f/0x30
Sep 3 20:19:38 ragnarok kernel: unmap_region+0xdd/0x110
Sep 3 20:19:38 ragnarok kernel: ? __vma_rb_erase+0x128/0x250
Sep 3 20:19:38 ragnarok kernel: do_munmap+0x273/0x3f0
Sep 3 20:19:38 ragnarok kernel: vm_munmap+0x5f/0xa0
Sep 3 20:19:38 ragnarok kernel: __x64_sys_munmap+0x22/0x30
Sep 3 20:19:38 ragnarok kernel: do_syscall_64+0x3e/0xe0
Sep 3 20:19:38 ragnarok kernel: entry_SYSCALL_64_after_hwframe+0x44/0xa9
Sep 3 20:19:38 ragnarok kernel: RIP: 0033:0x7fb469081187
Sep 3 20:19:38 ragnarok kernel: Code: ff ff ff f7 d8 89 05 58 df 20 00 48 c7 c0 ff ff ff ff eb 8a 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 0b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8d 0d 29 df 20 00 f7 d8 89 01 48 83
Sep 3 20:19:38 ragnarok kernel: RSP: 002b:00007ffef83ba548 EFLAGS: 00000206 ORIG_RAX: 000000000000000b
Sep 3 20:19:38 ragnarok kernel: RAX: ffffffffffffffda RBX: 0000562a1dca9010 RCX: 00007fb469081187
Sep 3 20:19:38 ragnarok kernel: RDX: 0000000000000002 RSI: 0000000000204028 RDI: 00007fb464c79000
Sep 3 20:19:38 ragnarok kernel: RBP: 00007ffef83ba720 R08: 00007fb46928e930 R09: 0000000000000000
Sep 3 20:19:38 ragnarok kernel: R10: 00007fb464e7d000 R11: 0000000000000206 R12: 00007ffef83ba654
Sep 3 20:19:38 ragnarok kernel: R13: 00007ffef83ba610 R14: 00007ffef83ba655 R15: 00007fb46928e000
Sep 3 20:19:38 ragnarok kernel: Modules linked in: autofs4 tcp_bbr sch_fq_codel pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) it87 hwmon_vid x86_pkg_temp_thermal uvcvideo videobuf2_vmalloc videobuf2_memops snd_usb_audio videobuf2_v4l2 snd_hwdep bfq snd_usbmidi_lib videodev snd_rawmidi coretemp snd_seq_device videobuf2_common radeon usbhid kvm_intel i2c_algo_bit kvm snd_hda_codec_realtek irqbypass drm_kms_helper snd_hda_codec_hdmi snd_hda_codec_generic pcbc syscopyarea sysfillrect sysimgblt mq_deadline fb_sys_fops ttm snd_hda_intel aesni_intel snd_hda_codec drm snd_hda_core aes_x86_64 crypto_simd drm_panel_orientation_quirks cryptd snd_pcm glue_helper backlight snd_timer snd i2c_i801 soundcore i2c_core r8169 parport_pc parport mii
Sep 3 20:19:38 ragnarok kernel: ---[ end trace cf25033b43d98311 ]---
Sep 3 20:19:38 ragnarok kernel: RIP: 0010:flush_tlb_func_common.constprop.4+0x23/0x260
Sep 3 20:19:38 ragnarok kernel: Code: 0b eb e5 0f 1f 40 00 66 66 66 66 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 f0 48 83 ec 20 65 48 8b 04 25 28 00 00 00 <48> 89 44 24 18 31 c0 65 66 8b 1d 96 fd fc 7e 0f b7 c3 65 48 8b 15
Sep 3 20:19:38 ragnarok kernel: RSP: 0018:ffffc9000326bfe0 EFLAGS: 00010082
Sep 3 20:19:38 ragnarok kernel: RAX: cf0a75e3a0e78e00 RBX: ffff880601006cc0 RCX: 0000000000000000
Sep 3 20:19:38 ragnarok kernel: RDX: 00007fb464e7e000 RSI: 0000000000000003 RDI: ffffc9000326c040
Sep 3 20:19:38 ragnarok kernel: RBP: ffffc9000326c030 R08: 00000005fca490e7 R09: 00000000004fa811
Sep 3 20:19:38 ragnarok kernel: R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000000004
Sep 3 20:19:38 ragnarok kernel: R13: ffff8805fbab7600 R14: ffff880601006cc0 R15: ffff880602dfb540
Sep 3 20:19:38 ragnarok kernel: FS: 00007fb469245240(0000) GS:ffff88061f500000(0000) knlGS:0000000000000000
Sep 3 20:19:38 ragnarok kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Sep 3 20:19:38 ragnarok kernel: CR2: ffffc9000326bfd8 CR3: 00000005feadb001 CR4: 00000000000606e0
Sep 3 20:19:40 ragnarok kernel: r8169 0000:04:00.0 eth0: link up
Sep 3 20:19:40 ragnarok kernel: IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready

This is repeatable; full log is available on request.

Reverting "mm-tlb-x86-mm-support-invalidating-tlb-caches-for-rcu_table_free"
makes everything work.

I'm now going back to my custom tree with lazy TLB handling, that worked as
advertised. :D

cheers
Holger

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