Date:   Wed, 20 Sep 2017 14:49:33 +0200
From:   Paweł Staszewski <pstaszewski@...are.pl>
To:     Eric Dumazet <eric.dumazet@...il.com>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>
Subject: Re: Latest net-next from GIT panic

And the last one

git bisect good
Bisecting: 1 revision left to test after this (roughly 1 step)
[1cfb71eeb12047bcdbd3e6730ffed66e810a0855] ipv6: take dst->__refcnt for 
insertion into fib6 tree

With this have kernel panic same as always

git bisect bad
Bisecting: 0 revisions left to test after this (roughly 0 steps)
[b838d5e1c5b6e57b10ec8af2268824041e3ea911] ipv4: mark DST_NOGC and 
remove the operation of dst_free()



W dniu 2017-09-20 o 14:23, Paweł Staszewski pisze:
> Almost there
>
> Bisecting: 6 revisions left to test after this (roughly 3 steps)
> [ad65a2f05695aced349e308193c6e2a6b1d87112] ipv6: call dst_hold_safe() 
> properly
>
>
>
> W dniu 2017-09-20 o 13:02, Paweł Staszewski pisze:
>> Ok resumed and soo far:
>>
>> Panic:
>>
>> # bad: [9cc9a5cb176ccb4f2cda5ac34da5a659926f125f] datapath: Avoid 
>> using stack larger than 1024.
>> git bisect bad 9cc9a5cb176ccb4f2cda5ac34da5a659926f125f
>>
>> No panic:
>>
>> # good: [073cf9e20c333ab29744717a23f9e43ec7512a20] Merge branch 
>> 'udp-reduce-cache-pressure'
>> git bisect good 073cf9e20c333ab29744717a23f9e43ec7512a20
>>
>>
>> W dniu 2017-09-20 o 12:22, Paweł Staszewski pisze:
>>> Soo far bisected and marked:
>>>
>>> git bisect start
>>> # bad: [07dd6cc1fff160143e82cf5df78c1db0b6e03355] Linux 4.13.2
>>> git bisect bad 07dd6cc1fff160143e82cf5df78c1db0b6e03355
>>> # good: [5d7d2e03e0f01a992e3521b180c3d3e67905f269] Linux 4.12.13
>>> git bisect good 5d7d2e03e0f01a992e3521b180c3d3e67905f269
>>> # good: [6f7da290413ba713f0cdd9ff1a2a9bb129ef4f6c] Linux 4.12
>>> git bisect good 6f7da290413ba713f0cdd9ff1a2a9bb129ef4f6c
>>> # bad: [ac7b75966c9c86426b55fe1c50ae148aa4571075] Merge tag 
>>> 'pinctrl-v4.13-1' of 
>>> git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
>>> git bisect bad ac7b75966c9c86426b55fe1c50ae148aa4571075
>>> # good: [e24dd9ee5399747b71c1d982a484fc7601795f31] Merge branch 
>>> 'next' of 
>>> git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
>>> git bisect good e24dd9ee5399747b71c1d982a484fc7601795f31
>>> # good: [e24dd9ee5399747b71c1d982a484fc7601795f31] Merge branch 
>>> 'next' of 
>>> git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
>>> git bisect good e24dd9ee5399747b71c1d982a484fc7601795f31
>>> # good: [e24dd9ee5399747b71c1d982a484fc7601795f31] Merge branch 
>>> 'next' of 
>>> git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
>>> git bisect good e24dd9ee5399747b71c1d982a484fc7601795f31
>>>
>>>
>>>
>>> W dniu 2017-09-20 o 12:21, Paweł Staszewski pisze:
>>>> Ok kernel crashed with different panic that i didnt catch when i 
>>>> was doing bisect and now my bisection is broken :)
>>>>
>>>> git bisect good
>>>> Bisecting: 1787 revisions left to test after this (roughly 11 steps)
>>>> error: Your local changes to the following files would be 
>>>> overwritten by checkout:
>>>>         Documentation/00-INDEX
>>>>         Documentation/ABI/stable/sysfs-class-udc
>>>>         Documentation/ABI/testing/configfs-usb-gadget-uac1
>>>>         Documentation/ABI/testing/ima_policy
>>>>         Documentation/ABI/testing/sysfs-bus-iio
>>>>         Documentation/ABI/testing/sysfs-bus-iio-meas-spec
>>>>         Documentation/ABI/testing/sysfs-bus-iio-timer-stm32
>>>>         Documentation/ABI/testing/sysfs-class-net
>>>>         Documentation/ABI/testing/sysfs-class-power-twl4030
>>>>         Documentation/ABI/testing/sysfs-class-typec
>>>>         Documentation/DMA-API.txt
>>>>         Documentation/IRQ-domain.txt
>>>>         Documentation/Makefile
>>>>         Documentation/PCI/MSI-HOWTO.txt
>>>>         Documentation/RCU/00-INDEX
>>>> Documentation/RCU/Design/Requirements/Requirements.html
>>>>         Documentation/RCU/checklist.txt
>>>>         Documentation/admin-guide/README.rst
>>>>         Documentation/admin-guide/devices.txt
>>>>         Documentation/admin-guide/index.rst
>>>>         Documentation/admin-guide/kernel-parameters.txt
>>>>         Documentation/admin-guide/pm/cpufreq.rst
>>>>         Documentation/admin-guide/pm/intel_pstate.rst
>>>>         Documentation/admin-guide/ras.rst
>>>>         Documentation/arm/Atmel/README
>>>>         Documentation/block/biodoc.txt
>>>>         Documentation/conf.py
>>>>         Documentation/core-api/assoc_array.rst
>>>>         Documentation/core-api/atomic_ops.rst
>>>>         Documentation/core-api/index.rst
>>>>         Documentation/crypto/asymmetric-keys.txt
>>>>         Documentation/dev-tools/index.rst
>>>>         Documentation/dev-tools/sparse.rst
>>>>         Documentation/devicetree/bindings/arm/amlogic.txt
>>>>         Documentation/devicetree/bindings/arm/atmel-at91.txt
>>>>         Documentation/devicetree/bindings/arm/ccn.txt
>>>>         Documentation/devicetree/bindings/arm/cpus.txt
>>>>         Documentation/devicetree/bindings/arm/gemini.txt
>>>> Documentation/devicetree/bindings/arm/hisilicon/hisilicon.txt
>>>> Documentation/devicetree/bindings/arm/keystone/keystone.txt
>>>>         Documentation/devicetree/bindings/arm/mediatek.txt
>>>>         Documentation/devicetree/bindings/arm/rockchip.txt
>>>>         Documentation/devicetree/bindings/arm/shmobile.txt
>>>>         Documentation/devicetree/bindings/arm/tegra.txt
>>>> Documentation/devicetree/bindings/ata/ahci-fsl-qoriq.txt
>>>> Documentation/devicetree/bindings/bus/brcm,gisb-arb.txt
>>>> Documentation/devicetree/bindings/clock/brcm,iproc-clocks.txt
>>>> Documentation/devicetree/bindings/cpufreq/ti-cpufreq.txt
>>>> Documentation/devicetree/bindings/gpio/gpio_atmel.txt
>>>> Documentation/devicetree/bindings/iio/adc/amlogic,meson-saradc.txt
>>>> Documentation/devicetree/bindings/iio/adc/renesas,gyroadc.txt
>>>> Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt
>>>> Documentation/devicetree/bindings/iio/imu/st_lsm6dsx.txt
>>>> Documentation/devicetree/bindings/interrupt-controller/allwinner,sunxi-nmi.txt 
>>>>
>>>> Documentation/devicetree/bindings/interrupt-controller/aspeed,ast2400-vic.txt 
>>>>
>>>> Documentation/devicetree/bindings/interrupt-controller/mediatek,sysirq.txt 
>>>>
>>>>         Documentation/devicetree/bindings/leds/common.txt
>>>>         Documentation/devicetree/bindings/mfd/hi6421.txt
>>>>         Documentation/devicetree/bindings/mfd/tps65910.txt
>>>>         Documentation/devicetree/bindings/mmc/fsl-esdhc.txt
>>>>         Documentation/devicetree/bindings/mmc/k3-dw-mshc.txt
>>>> Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.txt
>>>> Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt
>>>>         Documentation/devicetree/bindings/mtd/atmel-nand.txt
>>>>         Documentation/devicetree/bindings/net/dsa/b53.txt
>>>>         Documentation/devicetree/bindings/net/ethernet.txt
>>>>         Documentation/devicetree/bindings/net/macb.txt
>>>> Documentation/devicetree/bindings/net/marvell-orion-mdio.txt
>>>> Documentation/devicetree/bindings/net/ti,wilink-st.txt
>>>> Documentation/devicetree/bindings/net/wireless/ti,wlcore.txt
>>>> Documentation/devicetree/bindings/nvmem/rockchip-efuse.txt
>>>>         Documentation/devicetree/bindings/opp/opp.txt
>>>> Documentation/devicetree/bindings/phy/bcm-ns-usb3-phy.txt
>>>> Documentation/devicetree/bindings/phy/brcm-sata-phy.txt
>>>> Documentation/devicetree/bindings/phy/meson8b-usb2-phy.txt
>>>> Documentation/devicetree/bindings/phy/phy-rockchip-inno-usb2.txt
>>>> Documentation/devicetree/bindings/power/rockchip-io-domain.txt
>>>> Documentation/devicetree/bindings/power/supply/bq27xxx.txt
>>>>         Documentation/devicetree/bindings/property-units.txt
>>>> Documentation/devicetree/bindings/regulator/regulator.txt
>>>>         Documentation/devicetree/bindings/serial/8
>>>> error: The following untracked working tree files would be 
>>>> overwritten by checkout:
>>>>         Documentation/ABI/testing/sysfs-class-net-phydev
>>>>         Documentation/DocBook/.gitignore
>>>>         Documentation/DocBook/Makefile
>>>>         Documentation/DocBook/filesystems.tmpl
>>>>         Documentation/DocBook/kernel-hacking.tmpl
>>>>         Documentation/DocBook/kernel-locking.tmpl
>>>>         Documentation/DocBook/kgdb.tmpl
>>>>         Documentation/DocBook/libata.tmpl
>>>>         Documentation/DocBook/librs.tmpl
>>>>         Documentation/DocBook/lsm.tmpl
>>>>         Documentation/DocBook/mtdnand.tmpl
>>>>         Documentation/DocBook/networking.tmpl
>>>>         Documentation/DocBook/rapidio.tmpl
>>>>         Documentation/DocBook/s390-drivers.tmpl
>>>>         Documentation/DocBook/scsi.tmpl
>>>>         Documentation/DocBook/sh.tmpl
>>>>         Documentation/DocBook/stylesheet.xsl
>>>>         Documentation/DocBook/w1.tmpl
>>>>         Documentation/DocBook/z8530book.tmpl
>>>>         Documentation/Makefile.sphinx
>>>>         Documentation/RCU/trace.txt
>>>>         Documentation/devicetree/bindings/i2c/i2c-mt6577.txt
>>>> Documentation/devicetree/bindings/misc/allwinner,syscon.txt
>>>>         Documentation/devicetree/bindings/net/cortina.txt
>>>>         Documentation/devicetree/bindings/net/dsa/ksz.txt
>>>> Documentation/devicetree/bindings/net/dwmac-sun8i.txt
>>>> Documentation/devicetree/bindings/net/qca,qca7000.txt
>>>> Documentation/devicetree/bindings/power/max8903-charger.txt
>>>> Documentation/devicetree/bindings/power_supply/maxim,max14656.txt
>>>> Documentation/devicetree/bindings/ptp/brcm,ptp-dte.txt
>>>> Documentation/devicetree/bindings/timer/moxa,moxart-timer.txt
>>>>         Documentation/doc-guide/docbook.rst
>>>>         Documentation/networking/tls.txt
>>>>         Documentation/prctl/no_new_privs.txt
>>>>         Documentation/prctl/seccomp_filter.txt
>>>>         Documentation/security/00-INDEX
>>>>         Documentation/security/IMA-templates.txt
>>>>         Documentation/security/LSM.txt
>>>>         Documentation/security/LoadPin.txt
>>>>         Documentation/security/SELinux.txt
>>>>         Documentation/security/Smack.txt
>>>>         Documentation/security/Yama.txt
>>>>         Documentation/security/apparmor.txt
>>>>         Documentation/security/conf.py
>>>>         Documentation/security/credentials.txt
>>>>         Documentation/security/keys-ecryptfs.txt
>>>>         Documentation/security/keys-request-key.txt
>>>>         Documentation/security/keys-trusted-encrypted.txt
>>>>         Documentation/security/keys.txt
>>>>         Documentation/security/self-protection.txt
>>>>         Documentation/security/tomoyo.txt
>>>>         Documentation/sphinx/convert_template.sed
>>>>         Documentation/sphinx/post_convert.sed
>>>>         Documentation/sphinx/tmplcvt
>>>>         Documentation/usb/typec.rst
>>>>         Documentation/usb/usb3-debug-port.rst
>>>>         arch/arm/boot/dts/rk1108-evb.dts
>>>>         arch/arm/boot/dts/rk1108.dtsi
>>>>         arch/arm/boot/dts/tegra20-whistler.dts
>>>>         arch/arm/mach-omap2/opp.c
>>>>         arch/arm/mach-omap2/pmu.c
>>>>         arch/ia64/include/asm/siginfo.h
>>>>         arch/m32r/include/uapi/asm/siginfo.h
>>>>         arch/microblaze/include/asm/bitops.h
>>>>         arch/microblaze/include/asm/bug.h
>>>>         arch/microblaze/include/asm/bugs.h
>>>>         arch/microblaze/include/asm/div64.h
>>>>         arch/microblaze/include/asm/emergency-restart.h
>>>>         arch/microblaze/include/asm/fb.h
>>>>         arch/microblaze/include/asm/hardirq.h
>>>>         arch/microblaze/include/asm/irq_regs.h
>>>>         arch/microblaze/include/asm/kdebug.h
>>>>         arch/microblaze/include/asm/kmap_types.h
>>>>         arch/microblaze/include/asm/linkage.h
>>>>         arch/microblaze/include/asm/local.h
>>>>         arch/microblaze/include/asm/local64.h
>>>>         arch/microblaze/include/asm/parport.h
>>>>         arch/microblaze/include/asm/percpu.h
>>>>         arch/microblaze/include/asm/serial.h
>>>>         arch/microblaze/include/asm/shmparam.h
>>>>         arch/microblaze/include/asm/topology.h
>>>>         arch/microblaze/include/asm/ucontext.h
>>>>         arch/microblaze/include/asm/vga.h
>>>>         arch/microblaze/include/asm/xor.h
>>>>         arch/microblaze/include/uapi/asm/bitsperlong.h
>>>>         arch/microblaze/include/uapi/asm/errno.h
>>>>         arch/microblaze/include/uapi/asm/fcntl.h
>>>>         arch/microblaze/include/uapi/asm/ioctl.h
>>>>         arch/microblaze/include/uapi/asm/ioctls.h
>>>>         arch/microblaze/include/uapi/asm/ipcbuf.h
>>>>         arch/microblaze/include/uapi/asm/kvm_para.h
>>>>         arch/microblaze/include/uapi/asm/mman.h
>>>>         arch/microblaze/include/uapi/asm/msgbuf.h
>>>>         arch/microblaze/include/uapi/asm/param.h
>>>>         arch/microblaze/include/uapi/asm/poll.h
>>>>         arch/microblaze/include/uapi/asm/resource.h
>>>>         arch/microblaze/include/uapi/asm/sembuf.h
>>>>         arch/microblaze/include/uapi/asm/shmbuf.h
>>>>         arch/microblaze/include/uapi/asm/siginfo.h
>>>>         arch/microblaze/include/uapi/asm/signal.h
>>>>         arch/microblaze/includ
>>>> Aborting
>>>>
>>>>
>>>>
>>>> W dniu 2017-09-20 o 11:45, Paweł Staszewski pisze:
>>>>> Ok looks like ending bisection
>>>>>
>>>>>
>>>>> Latest bisected kernel when there is no kernel panic 4.12.0+ (from 
>>>>> next)  - but only this warning:
>>>>>
>>>>> [  309.030019] NETDEV WATCHDOG: enp4s0f0 (ixgbe): transmit queue 0 
>>>>> timed out
>>>>> [  309.030034] ------------[ cut here ]------------
>>>>> [  309.030040] WARNING: CPU: 35 PID: 0 at dev_watchdog+0xcf/0x139
>>>>> [  309.030041] Modules linked in: bonding ipmi_si 
>>>>> x86_pkg_temp_thermal
>>>>> [  309.030045] CPU: 35 PID: 0 Comm: swapper/35 Not tainted 4.12.0+ #5
>>>>> [  309.030046] task: ffff88086d98a000 task.stack: ffffc90003378000
>>>>> [  309.030048] RIP: 0010:dev_watchdog+0xcf/0x139
>>>>> [  309.030049] RSP: 0018:ffff88087fbc3ea8 EFLAGS: 00010246
>>>>> [  309.030050] RAX: 000000000000003d RBX: ffff88046b680000 RCX: 
>>>>> 0000000000000000
>>>>> [  309.030050] RDX: ffff88087fbd2f01 RSI: 0000000000000000 RDI: 
>>>>> ffff88087fbcda08
>>>>> [  309.030051] RBP: ffff88087fbc3eb8 R08: 0000000000000000 R09: 
>>>>> ffff88087ff80a04
>>>>> [  309.030051] R10: 0000000000000000 R11: ffff88086d98a001 R12: 
>>>>> 0000000000000000
>>>>> [  309.030052] R13: ffff88087fbc3ef8 R14: ffff88086d98a000 R15: 
>>>>> ffffffff81c06008
>>>>> [  309.030053] FS:  0000000000000000(0000) 
>>>>> GS:ffff88087fbc0000(0000) knlGS:0000000000000000
>>>>> [  309.030054] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>>>>> [  309.030054] CR2: 00007fba600f6098 CR3: 000000086b955000 CR4: 
>>>>> 00000000001406e0
>>>>> [  309.030055] Call Trace:
>>>>> [  309.030057]  <IRQ>
>>>>> [  309.030059]  ? netif_tx_lock+0x79/0x79
>>>>> [  309.030062]  call_timer_fn.isra.24+0x17/0x77
>>>>> [  309.030063]  run_timer_softirq+0x118/0x161
>>>>> [  309.030065]  ? netif_tx_lock+0x79/0x79
>>>>> [  309.030066]  ? ktime_get+0x2b/0x42
>>>>> [  309.030070]  ? lapic_next_deadline+0x21/0x27
>>>>> [  309.030073]  ? clockevents_program_event+0xa8/0xc5
>>>>> [  309.030076]  __do_softirq+0xa8/0x19d
>>>>> [  309.030078]  irq_exit+0x5d/0x6b
>>>>> [  309.030079]  smp_apic_timer_interrupt+0x2a/0x36
>>>>> [  309.030082]  apic_timer_interrupt+0x89/0x90
>>>>> [  309.030085] RIP: 0010:mwait_idle+0x4e/0x6a
>>>>> [  309.030086] RSP: 0018:ffffc9000337be98 EFLAGS: 00000246 
>>>>> ORIG_RAX: ffffffffffffff10
>>>>> [  309.030087] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 
>>>>> 0000000000000000
>>>>> [  309.030087] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 
>>>>> ffff88086d98a000
>>>>> [  309.030088] RBP: ffffc9000337be98 R08: ffff88046f8279a0 R09: 
>>>>> ffff88046f827040
>>>>> [  309.030089] R10: ffff88086d98a000 R11: ffff88086d98a000 R12: 
>>>>> 0000000000000000
>>>>> [  309.030089] R13: ffff88086d98a000 R14: ffff88086d98a000 R15: 
>>>>> ffff88086d98a000
>>>>> [  309.030090]  </IRQ>
>>>>> [  309.030094]  arch_cpu_idle+0xa/0xc
>>>>> [  309.030095]  default_idle_call+0x19/0x1b
>>>>> [  309.030102]  do_idle+0xbc/0x196
>>>>> [  309.030104]  cpu_startup_entry+0x1d/0x20
>>>>> [  309.030105]  start_secondary+0xd8/0xdc
>>>>> [  309.030108]  secondary_startup_64+0x9f/0x9f
>>>>> [  309.030109] Code: cc 75 bd eb 35 48 89 df c6 05 c3 dc 74 00 01 
>>>>> e8 3a 62 fe ff 44 89 e1 48 89 de 48 89 c2 48 c7 c7 0f 65 a4 81 31 
>>>>> c0 e8 3d 4c b5 ff <0f> ff 48 8b 83 e0 01 00 00 48 89 df ff 50 78 
>>>>> 48 8b 05 a0 bc 6a
>>>>> [  309.030128] ---[ end trace 9102cb25703ae2d9 ]---
>>>>>
>>>>>
>>>>> I just marked it as good - cause this problem above is differend - 
>>>>> and im going to:
>>>>>
>>>>> git bisect good
>>>>> Bisecting: 1787 revisions left to test after this (roughly 11 steps)
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> W dniu 2017-09-20 o 10:44, Paweł Staszewski pisze:
>>>>>> Trying to make video from ipmi :)
>>>>>>
>>>>>> with that results:
>>>>>>
>>>>>> https://bugzilla.kernel.org/attachment.cgi?id=258521
>>>>>>
>>>>>> catched two more lines where it starts - panic from 4.13.2.
>>>>>>
>>>>>>
>>>>>> Now will try tro do some bisection
>>>>>>
>>>>>>
>>>>>>
>>>>>> W dniu 2017-09-20 o 09:58, Paweł Staszewski pisze:
>>>>>>> Hi
>>>>>>>
>>>>>>>
>>>>>>> Will try bisecting tonight
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> W dniu 2017-09-20 o 05:24, Eric Dumazet pisze:
>>>>>>>> On Wed, 2017-09-20 at 02:06 +0200, Paweł Staszewski wrote:
>>>>>>>>> Just checked kernel 4.13.2 and same problem
>>>>>>>>>
>>>>>>>>> Just after start all 6 bgp sessions - and kernel starts to 
>>>>>>>>> learn routes
>>>>>>>>> it panic.
>>>>>>>>>
>>>>>>>>> https://bugzilla.kernel.org/attachment.cgi?id=258509
>>>>>>>>>
>>>>>>>>
>>>>>>>> Unfortunately we have not enough information from these traces.
>>>>>>>>
>>>>>>>> Can you get a full stack trace ?
>>>>>>>>
>>>>>>>> Alternatively, can you bisect ?
>>>>>>>>
>>>>>>>> Thanks.
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>
>>>
>>
>>
>
>

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