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SubjectRe: 5.4.7: WARNING: CPU: 4 PID: 30 at kernel/rcu/tree.c:2211 rcu_core+0x3f7/0x450
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Hello,

I opened bug https://bugzilla.kernel.org/show_bug.cgi?id=206191 for this
issue as it also appears to crash the system multiple times per day on
5.4.x.


Kind regards,
Udo

On 04-01-2020 16:02, Udo van den Heuvel wrote:
> On 02-01-2020 18:01, Udo van den Heuvel wrote:
> (...)
>>
>> What happend here?
>> Is it a bug?
>
> It appears to happen more than once:
>
> [ 246.911694] ------------[ cut here ]------------
> [ 246.911705] WARNING: CPU: 3 PID: 25 at kernel/rcu/tree.c:2211
> rcu_core+0x3f7/0x450
> [ 246.911706] Modules linked in: fuse mq_deadline ip6t_REJECT
> nf_reject_ipv6 xt_state ip6table_filter ip6_tables
> nf_conntrack_netbios_ns nf_conntrack_broadcast xt_MASQUERADE iptable_nat
> nf_nat ipt_REJECT nf_reject_ipv4 xt_u32 xt_multiport xt_tcpudp
> xt_conntrack nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 msr it87
> hwmon_vid iptable_filter uvcvideo videobuf2_vmalloc snd_usb_audio
> videobuf2_memops videobuf2_v4l2 snd_hwdep videodev snd_usbmidi_lib
> videobuf2_common snd_rawmidi cdc_acm snd_hda_codec_realtek
> snd_hda_codec_generic snd_hda_intel snd_intel_nhlt snd_hda_codec
> snd_hda_core snd_seq k10temp snd_seq_device snd_pcm i2c_piix4 snd_timer
> snd bfq evdev acpi_cpufreq binfmt_misc ip_tables x_tables hid_generic
> sr_mod cdrom usbhid aesni_intel amdgpu gpu_sched ttm i2c_dev autofs4
> [ 246.911746] CPU: 3 PID: 25 Comm: ksoftirqd/3 Tainted: G W
> 5.4.7 #9
> [ 246.911748] Hardware name: Gigabyte Technology Co., Ltd. X570 AORUS
> PRO/X570 AORUS PRO, BIOS F11 12/06/2019
> [ 246.911750] RIP: 0010:rcu_core+0x3f7/0x450
> [ 246.911754] Code: fd ff ff 48 2b 15 49 13 f6 00 48 39 c2 7e 07 48 89
> 83 b0 00 00 00 48 8b 43 50 48 85 c0 75 c7 0f 0b eb c3 0f 0b e9 59 fc ff
> ff <0f> 0b eb b8 48 8b 15 26 13 f6 00 48 89 93 c0 00 00 00 e9 72 ff ff
> [ 246.911756] RSP: 0018:ffff9df7801d7e18 EFLAGS: 00010006
> [ 246.911758] RAX: 000000397e6650ca RBX: ffff8ba4df0dee80 RCX:
> ffff8ba4a056d590
> [ 246.911759] RDX: 0000000000000000 RSI: ffff9df7801d7e18 RDI:
> ffff8ba4df0deed0
> [ 246.911761] RBP: ffff8ba4df0deed0 R08: 0000000000000000 R09:
> 0000000000000100
> [ 246.911762] R10: 0000000000000002 R11: 0000000000000000 R12:
> 0000000000000246
> [ 246.911763] R13: ffff8ba4ddf410c0 R14: 0000000000000000 R15:
> 0000000000000000
> [ 246.911765] FS: 0000000000000000(0000) GS:ffff8ba4df0c0000(0000)
> knlGS:0000000000000000
> [ 246.911766] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [ 246.911768] CR2: 00007ff60f06ffe0 CR3: 00000003d179c000 CR4:
> 00000000003406e0
> [ 246.911769] Call Trace:
> [ 246.911777] __do_softirq+0xfc/0x247
> [ 246.911783] run_ksoftirqd+0x21/0x30
> [ 246.911787] smpboot_thread_fn+0x195/0x230
> [ 246.911789] ? sort_range+0x20/0x20
> [ 246.911792] kthread+0x118/0x130
> [ 246.911795] ? kthread_create_worker_on_cpu+0x60/0x60
> [ 246.911797] ret_from_fork+0x22/0x40
> [ 246.911800] ---[ end trace 6f223c45fc8e7e99 ]---
>
> Kind regards,
> Udo
>

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