Re: Latest net-next from GIT panic

hmm

But after

b838d5e1c5b6e57b10ec8af2268824041e3ea911 is the first bad commit
commit b838d5e1c5b6e57b10ec8af2268824041e3ea911
Author: Wei Wang [off-list ref]
Date:   Sat Jun 17 10:42:32 2017 -0700

     ipv4: mark DST_NOGC and remove the operation of dst_free()

     With the previous preparation patches, we are ready to get rid of the
     dst gc operation in ipv4 code and release dst based on refcnt only.
     So this patch adds DST_NOGC flag for all IPv4 dst and remove the calls
     to dst_free().
     At this point, all dst created in ipv4 code do not use the dst gc
     anymore and will be destroyed at the point when refcnt drops to 0.

     Signed-off-by: Wei Wang [off-list ref]
     Acked-by: Martin KaFai Lau [off-list ref]
     Signed-off-by: David S. Miller [off-list ref]

:040000 040000 9b7e7fb641de6531fc7887473ca47ef7cb6a11da 
831a73b71d3df1755f3e24c0d3c86d7a93fd55e2 M      net


Still panic - soo will back to past 3 steps and will try to get again 
bisect without panic.



W dniu 2017-09-20 o 14:49, Paweł Staszewski pisze:

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:

quoted

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:

quoted

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:

quoted

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:

quoted

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
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        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
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        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
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        Documentation/crypto/asymmetric-keys.txt
        Documentation/dev-tools/index.rst
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        Documentation/devicetree/bindings/leds/common.txt
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        Documentation/devicetree/bindings/serial/8
error: The following untracked working tree files would be 
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        Documentation/ABI/testing/sysfs-class-net-phydev
        Documentation/DocBook/.gitignore
        Documentation/DocBook/Makefile
        Documentation/DocBook/filesystems.tmpl
        Documentation/DocBook/kernel-hacking.tmpl
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        Documentation/devicetree/bindings/net/cortina.txt
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        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
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        arch/microblaze/include/asm/kdebug.h
        arch/microblaze/include/asm/kmap_types.h
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        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:

quoted

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:

quoted

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:

quoted

Hi


Will try bisecting tonight



W dniu 2017-09-20 o 05:24, Eric Dumazet pisze:

quoted

On Wed, 2017-09-20 at 02:06 +0200, Paweł Staszewski wrote:

quoted

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.