Message-ID: <CA+G9fYusnp3AdtfPji2oX1=WKzm6Gwy_GcK2E4bVyaQcaf2+jA@mail.gmail.com>
Date: Thu, 13 Jun 2024 13:28:10 +0530
From: Naresh Kamboju <naresh.kamboju@...aro.org>
To: Steven Rostedt <rostedt@...dmis.org>
Cc: open list <linux-kernel@...r.kernel.org>, lkft-triage@...ts.linaro.org, 
	Linux Regressions <regressions@...ts.linux.dev>, Dan Carpenter <dan.carpenter@...aro.org>, 
	Arnd Bergmann <arnd@...db.de>, Masami Hiramatsu <mhiramat@...nel.org>, Mark Rutland <mark.rutland@....com>
Subject: Re: LTP tracing crashed on arm64 rk3399-rock-pi-4 - pc : ftrace_ops_test

On Wed, 12 Jun 2024 at 22:21, Steven Rostedt <rostedt@...dmis.org> wrote:
>
> On Wed, 12 Jun 2024 16:52:05 +0530
> Naresh Kamboju <naresh.kamboju@...aro.org> wrote:
>
> > The following kernel oops and kernel panic noticed while running LTP tracing
> > test cases on arm64 rk3399-rock-pi-4 device running Linux next-20240612 tag.
>
> How reproducible is this?  Do you only see it on arm64?

This is only seen once and not easy to reproduce.
I see only on arm64 rk3399-rock-pi-4 board.

>
> >
> > Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>
> >
> > Boot and test log:
> > --------------
> > [    0.000000] Linux version 6.10.0-rc3-next-20240612 (tuxmake@...make)
> >  (Debian clang version 18.1.6
> >  (++20240518023133+1118c2e05e67-1~exp1~20240518143227.130),
> >  Debian LLD 18.1.6) #1 SMP PREEMPT @1718178628
> > ...
> > trap: SIGUSR1: bad trap
> > ftrace-stress-test 1 TINFO: Start pid16=595
>
> ug, I guess I need to try to get LTP working again.
>
>
> > /opt/ltp/testcases/bin/ftrace_stress/ftrace_tracing_cpumask.sh
> > ftrace-stress-test 1 TINFO: Start pid17=598
> > /opt/ltp/testcases/bin/ftrace_stress/ftrace_set_ftrace_filter.sh
> > [   55.770077] Scheduler tracepoints stat_sleep, stat_iowait,
> > stat_blocked and stat_runtime require the kernel parameter
> > schedstats=enable or kernel.sched_schedstats=1
> > [   55.790580] Scheduler tracepoints stat_sleep, stat_iowait,
> > stat_blocked and stat_runtime require the kernel parameter
> > schedstats=enable or kernel.sched_schedstats=1
> > trap: SIGTERM: bad trap
> > ftrace_buffer_size_kb.sh: 33: echo: echo: I/O error
> > ftrace_buffer_size_kb.sh: 33: echo: echo: I/O error
> > ftrace_buffer_size_kb.sh: 33: echo: echo: I/O error
> > ftrace_buffer_size_kb.sh: 33: echo: echo: I/O error
> > ftrace_buffer_size_kb.sh: 33: echo: echo: I/O error
> > ftrace_buffer_size_kb.sh: 33: echo: echo: I/O error
> > ftrace_buffer_size_kb.sh: 33: echo: echo: I/O error
> > ftrace_buffer_size_kb.sh: 33: echo: echo: I/O error
> > ftrace_buffer_size_kb.sh: 33: echo: echo: I/O error
> > ftrace_buffer_size_kb.sh: 33: echo: echo: I/O error
> > ftrace_buffer_size_kb.sh: 33: echo: echo: I/O error
> > ftrace_buffer_size_kb.sh: 33: echo: echo: I/O error
> > ftrace_buffer_size_kb.sh: 33: echo: echo: I/O error
> > ftrace_buffer_size_kb.sh: 33: echo: echo: I/O error
> > ftrace_buffer_size_kb.sh: 33: echo: echo: I/O error
> > [  100.599846] Unable to handle kernel NULL pointer dereference at
> > virtual address 0000000000000008
> > [  100.599846] Unable to handle kernel NULL pointer dereference at
> > virtual address 0000000000000008
> > [  100.599846] Unable to handle kernel NULL pointer dereference at
> > virtual address 0000000000000008
> > [  100.599846] Unable to handle kernel NULL pointer dereference at
> > virtual address 0000000000000008
> > [  100.599856] Unable to handle kernel NULL pointer dereference at
> > virtual address 0000000000000008
> > [  100.599866] Mem abort info:
> > [  100.599867] Mem abort info:
> > [  100.599867] Mem abort info:
> > [  100.599874]   ESR = 0x0000000096000004
> > [  100.599875]   ESR = 0x0000000096000004
> > [  100.599875]   ESR = 0x0000000096000004
> > [  100.599883]   EC = 0x25: DABT (current EL), IL = 32 bits
> > [  100.599885]   EC = 0x25: DABT (current EL), IL = 32 bits
> > [  100.599885]   EC = 0x25: DABT (current EL), IL = 32 bits
> > [  100.599892]   SET = 0, FnV = 0
> > [  100.599896]   SET = 0, FnV = 0
> > [  100.599896]   SET = 0, FnV = 0
> > [  100.599899]   EA = 0, S1PTW = 0
> > [  100.599906]   EA = 0, S1PTW = 0
> > [  100.599906]   EA = 0, S1PTW = 0
> > [  100.599906]   FSC = 0x04: level 0 translation fault
> > [  100.599914] Data abort info:
> > [  100.599915]   FSC = 0x04: level 0 translation fault
> > [  100.599915]   FSC = 0x04: level 0 translation fault
> > [  100.599920]   ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000
> > [  100.599925] Data abort info:
> > [  100.599926] Data abort info:
> > [  100.599928]   CM = 0, WnR = 0, TnD = 0, TagAccess = 0
> > [  100.599935]   ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000
> > [  100.599935]   ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000
> > [  100.599936]   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
> > [  100.599944]   CM = 0, WnR = 0, TnD = 0, TagAccess = 0
> > [  100.599946]   CM = 0, WnR = 0, TnD = 0, TagAccess = 0
> > [  100.599945] user pgtable: 4k pages, 48-bit VAs, pgdp=0000000014fc7000
> > [  100.599955]   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
> > [  100.599955]   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
> > [  100.599956] [0000000000000008] pgd=0000000000000000
> > [  100.599964] , p4d=0000000000000000
> > [  100.599966] user pgtable: 4k pages, 48-bit VAs, pgdp=0000000006ce0000
> > [  100.599966] user pgtable: 4k pages, 48-bit VAs, pgdp=00000000079ec000
> > [  100.599975]
> > [  100.599976] [0000000000000008] pgd=0000000000000000
> > [  100.599977] [0000000000000008] pgd=0000000000000000
> > [  100.599985] , p4d=0000000000000000
> > [  100.599986] , p4d=0000000000000000
> > [  100.599985] Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP
> > [  100.599992]
> > [  100.599994]
> > [  100.599997] Modules linked in: brcmfmac snd_soc_hdmi_codec
> > dw_hdmi_cec dw_hdmi_i2s_audio brcmutil crct10dif_ce rockchipdrm
> > hci_uart snd_soc_spdif_tx hantro_vpu panfrost snd_soc_simple_card
> > snd_soc_audio_graph_card btqca dw_mipi_dsi gpu_sched
> > snd_soc_simple_card_utils btbcm v4l2_h264 analogix_dp cfg80211
> > drm_shmem_helper dw_hdmi v4l2_vp9 phy_rockchip_pcie bluetooth
> > v4l2_mem2mem cec snd_soc_rockchip_i2s videobuf2_v4l2
> > drm_display_helper videobuf2_dma_contig drm_dma_helper
> > videobuf2_memops rtc_rk808 rfkill snd_soc_es8316 videobuf2_common
> > drm_kms_helper rockchip_saradc industrialio_triggered_buffer
> > pcie_rockchip_host rockchip_thermal kfifo_buf coresight_cpu_debug drm
> > fuse backlight dm_mod ip_tables x_tables
> > [  100.600212] CPU: 3 PID: 0 Comm: swapper/3 Not tainted
> > 6.10.0-rc3-next-20240612 #1
> > [  100.600222] Hardware name: Radxa ROCK Pi 4B (DT)
> > [  100.600229] pstate: 800003c5 (Nzcv DAIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
> > [  100.600239] pc : ftrace_ops_test+0x34/0x138
>
> Hmm, could you show the exact line of the above code? Specifically we have:

Sorry. I have tried to decode stack dump but it is not giving valid information.

>
>         rcu_assign_pointer(hash.filter_hash, ops->func_hash->filter_hash);
>         rcu_assign_pointer(hash.notrace_hash, ops->func_hash->notrace_hash);
>
> Hmm, it's a NULL pointer dereference at 0x8, so ops is likely not NULL,
> as func_hash is much farther down. But if func_hash is NULL,
> filter_hash is at the 0x8 offset.
>
> So now the question is, how did func_hash become NULL. It should always
> be pointing at something. May have to do with the subops. Will investigate.
>
> Thanks,
>
> -- Steve

 - Naresh
>
> > [  100.600258] lr : function_graph_enter+0x144/0x208
> > [  100.600271] sp : ffff800082fd3730
> > [  100.600276] x29: ffff800082fd3770 x28: 0000000000000038 x27: ffff80008271a790
> > [  100.600293] x26: ffff800082d24b08 x25: ffffffffffffffff x24: ffff800082d24000
> > [  100.600310] x23: 0000000000000001 x22: 0000000000000001 x21: ffff000000cbdf00
> > [  100.600326] x20: ffff80008271a3f0 x19: ffff800080163078 x18: 000000000000123d
> > [  100.600343] x17: 0000000000000000 x16: 00500072b5503510 x15: 0000000000000000
> > [  100.600359] x14: 0000000000000009 x13: 0000000000000037 x12: 0000000000000006
> > [  100.600375] x11: 00000000fffffffe x10: ffff800082fd3740 x9 : ffff800082fd3738
> > [  100.600391] x8 : 0000000000000000 x7 : 00000072b5503510 x6 : 0000000000300000
> > [  100.600407] x5 : 0000000000000000 x4 : ffff8000801ffc20 x3 : ffff800082fd3900
> > [  100.600423] x2 : 0000000000000000 x1 : ffff800080163078 x0 : ffff80008271a400
> > [  100.600440] Call trace:
> > [  100.600445]  ftrace_ops_test+0x34/0x138
> > [  100.600455]  function_graph_enter+0x144/0x208
> > [  100.600465]  ftrace_graph_func+0x34/0x58
> > [  100.600477]  arch_ftrace_ops_list_func+0xd0/0x180
> > [  100.600489]  ftrace_caller+0x6c/0x9c
> > [  100.600498]  __traceiter_rcu_dyntick+0xc/0x88
> > [  100.600511]  trace_rcu_dyntick+0x7c/0xa0
> > [  100.600523]  ct_nmi_enter+0x90/0xc0
> > [  100.600537]  ct_irq_enter+0x10/0x20
> > [  100.600548]  enter_from_kernel_mode+0x30/0x58
> > [  100.600560]  el1_abort+0x24/0x60
> > [  100.600570]  el1h_64_sync_handler+0x80/0xd0
> > [  100.600580]  el1h_64_sync+0x64/0x68
> > [  100.600590]  ftrace_ops_test+0x34/0x138
> > [  100.600600]  function_graph_enter+0x144/0x208
> > [  100.600610]  ftrace_graph_func+0x34/0x58
> > [  100.600620]  arch_ftrace_ops_list_func+0xd0/0x180
> > [  100.600633] Mem abort info:
> > [  100.600630]  ftrace_caller+0x6c/0x9c
> > [  100.600639]   ESR = 0x0000000096000004
> > [  100.600641]  arch_timer_set_next_event_phys+0xc/0x50
> > [  100.600656]  clockevents_program_event+0xa0/0x1e0
> > [  100.600669]  tick_program_event+0x5c/0xb0
> > [  100.600679]  hrtimer_start_range_ns+0x15c/0x350
> > [  100.600691]  tick_nohz_restart_sched_tick+0x90/0xb0
> > [  100.600702]  tick_nohz_idle_exit+0xf0/0x168
> > [  100.600712]  do_idle+0x238/0x290
> > [  100.600721]  cpu_startup_entry+0x40/0x50
> > [  100.600730]  secondary_start_kernel+0x13c/0x168
> > [  100.600743]  __secondary_switched+0xb8/0xc0
> > [  100.600761] Code: f9402c08 a902ffff a901ffff a900ffff (f9400508)
> > [  100.600769] ---[ end trace 0000000000000000 ]---
> > [  100.600782] Kernel panic - not syncing: Attempted to kill the idle task!
> > [  100.600789] SMP: stopping secondary CPUs
> > [  101.767463] SMP: failed to stop secondary CPUs 0-1,3-5
> > [  101.767476] Kernel Offset: disabled
> > [  101.767481] CPU features: 0x04,00001041,60100000,4200421b
> > [  101.767489] Memory Limit: none
> > [  101.814070] ---[ end Kernel panic - not syncing: Attempted to kill
> > the idle task! ]---
> >
> > metadata:
> > -------
> >   git_describe: next-20240612
> >   git_repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next
> >   git_sha: 03d44168cbd7fc57d5de56a3730427db758fc7f6
> >   kernel-config:
> > https://storage.tuxsuite.com/public/linaro/lkft/builds/2hloyVmgiND3p4zFZFj3KksAgm8/config
> >   build-url: https://storage.tuxsuite.com/public/linaro/lkft/builds/2hloyVmgiND3p4zFZFj3KksAgm8/
> >   kernel_version: 6.10.0-rc3
> >   toolchain: clang-18
> >
> > Links:
> > ----
> >  - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240612/testrun/24277665/suite/log-parser-test/tests/
> >  - https://lkft.validation.linaro.org/scheduler/job/7658998#L1508
> >
> >  --
> > Linaro LKFT
> > https://lkft.linaro.org
>

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