linux-kernel - Re: 5.4.7: WARNING: CPU: 4 PID: 30 at kernel/rcu/tree.c:2211 rcu

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Message-ID: <1c1fe83d-4173-f4a0-71d2-8b07a718f5f6@xs4all.nl>
Date:   Sat, 4 Jan 2020 16:02:28 +0100
From:   Udo van den Heuvel <udovdh@...all.nl>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: 5.4.7: WARNING: CPU: 4 PID: 30 at kernel/rcu/tree.c:2211
 rcu_core+0x3f7/0x450

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