Re: WARNING trace at kvm_nx_huge_page_recovery_worker on 6.3.4

From: Bagas Sanjaya <bagasdotme@gmail.com>
To: Fabio Coatti <fabio.coatti@gmail.com>,
	stable@vger.kernel.org, regressions@lists.linux.dev,
	kvm@vger.kernel.org
Cc: Junaid Shahid <junaids@google.com>, Paolo Bonzini <pbonzini@redhat.com>
Subject: Re: WARNING trace at kvm_nx_huge_page_recovery_worker on 6.3.4
Date: Sun, 28 May 2023 19:44:34 +0700	[thread overview]
Message-ID: <ZHNMsmpo2LWjnw1A@debian.me> (raw)
In-Reply-To: <CADpTngX9LESCdHVu_2mQkNGena_Ng2CphWNwsRGSMxzDsTjU2A@mail.gmail.com>

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On Fri, May 26, 2023 at 09:43:17AM +0200, Fabio Coatti wrote:
> Hi all,
> I'm using vanilla kernels on a gentoo-based laptop and since 6.3.2 I'm
> getting the kernel log  below when using kvm VM on my box.
> I know, kernel is tainted but avoiding to load nvidia driver could
> make things complicated on my side; if needed for debug I can try to
> avoid it.
> 
> Not sure which other infos can be relevant in this context; if you
> need more details just let me know, happy to provide them.
> 
> [Fri May 26 09:16:35 2023] ------------[ cut here ]------------
> [Fri May 26 09:16:35 2023] WARNING: CPU: 5 PID: 4684 at
> kvm_nx_huge_page_recovery_worker+0x38c/0x3d0 [kvm]
> [Fri May 26 09:16:35 2023] Modules linked in: vhost_net vhost
> vhost_iotlb tap tun tls rfcomm snd_hrtimer snd_seq xt_CHECKSUM
> algif_skcipher xt_MASQUERADE xt_conntrack ipt_REJECT nf_reject_ipv4
> ip6table_mangle ip6table_nat ip6table_filter ip6_tables iptable_mangle
> iptable_nat nf_nat iptable_filter ip_tables bpfilter bridge stp llc
> rmi_smbus rmi_core bnep squashfs sch_fq_codel nvidia_drm(POE)
> intel_rapl_msr vboxnetadp(OE) vboxnetflt(OE) nvidia_modeset(POE)
> mei_pxp mei_hdcp rtsx_pci_sdmmc vboxdrv(OE) mmc_core intel_rapl_common
> intel_pmc_core_pltdrv intel_pmc_core snd_ctl_led intel_tcc_cooling
> snd_hda_codec_realtek snd_hda_codec_generic x86_pkg_temp_thermal
> intel_powerclamp btusb btrtl snd_usb_audio btbcm btmtk kvm_intel
> btintel snd_hda_intel snd_intel_dspcfg snd_usbmidi_lib snd_hda_codec
> snd_rawmidi snd_hwdep bluetooth snd_hda_core snd_seq_device kvm
> snd_pcm thinkpad_acpi iwlmvm mousedev ledtrig_audio uvcvideo snd_timer
> ecdh_generic irqbypass crct10dif_pclmul crc32_pclmul polyval_clmulni
> snd think_lmi joydev mei_me ecc uvc
> [Fri May 26 09:16:35 2023]  polyval_generic rtsx_pci iwlwifi
> firmware_attributes_class psmouse wmi_bmof soundcore intel_pch_thermal
> mei platform_profile input_leds evdev nvidia(POE) coretemp hwmon
> akvcam(OE) videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videodev
> videobuf2_common mc loop nfsd auth_rpcgss nfs_acl efivarfs dmi_sysfs
> dm_zero dm_thin_pool dm_persistent_data dm_bio_prison dm_service_time
> dm_round_robin dm_queue_length dm_multipath dm_delay virtio_pci
> virtio_pci_legacy_dev virtio_pci_modern_dev virtio_blk virtio_console
> virtio_balloon vxlan ip6_udp_tunnel udp_tunnel macvlan virtio_net
> net_failover failover virtio_ring virtio fuse overlay nfs lockd grace
> sunrpc linear raid10 raid1 raid0 dm_raid raid456 async_raid6_recov
> async_memcpy async_pq async_xor async_tx md_mod dm_snapshot dm_bufio
> dm_crypt trusted asn1_encoder tpm rng_core dm_mirror dm_region_hash
> dm_log firewire_core crc_itu_t hid_apple usb_storage ehci_pci ehci_hcd
> sr_mod cdrom ahci libahci libata
> [Fri May 26 09:16:35 2023] CPU: 5 PID: 4684 Comm: kvm-nx-lpage-re
> Tainted: P     U     OE      6.3.4-cova #1
> [Fri May 26 09:16:35 2023] Hardware name: LENOVO
> 20EQS58500/20EQS58500, BIOS N1EET98W (1.71 ) 12/06/2022
> [Fri May 26 09:16:35 2023] RIP:
> 0010:kvm_nx_huge_page_recovery_worker+0x38c/0x3d0 [kvm]
> [Fri May 26 09:16:35 2023] Code: 48 8b 44 24 30 4c 39 e0 0f 85 1b fe
> ff ff 48 89 df e8 2e ab fb ff e9 23 fe ff ff 49 bc ff ff ff ff ff ff
> ff 7f e9 fb fc ff ff <0f> 0b e9 1b ff ff ff 48 8b 44 24 40 65 48 2b 04
> 25 28 00 00 00 75
> [Fri May 26 09:16:35 2023] RSP: 0018:ffff8e1a4403fe68 EFLAGS: 00010246
> [Fri May 26 09:16:35 2023] RAX: 0000000000000000 RBX: ffff8e1a42bbd000
> RCX: 0000000000000000
> [Fri May 26 09:16:35 2023] RDX: 0000000000000000 RSI: 0000000000000000
> RDI: 0000000000000000
> [Fri May 26 09:16:35 2023] RBP: ffff8b4e9a56d930 R08: 0000000000000000
> R09: ffff8b4e9a56d8a0
> [Fri May 26 09:16:35 2023] R10: 0000000000000000 R11: 0000000000000001
> R12: ffff8e1a4403fe98
> [Fri May 26 09:16:35 2023] R13: 0000000000000001 R14: ffff8b4d9c432e80
> R15: 0000000000000010
> [Fri May 26 09:16:35 2023] FS:  0000000000000000(0000)
> GS:ffff8b5cdf740000(0000) knlGS:0000000000000000
> [Fri May 26 09:16:35 2023] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [Fri May 26 09:16:35 2023] CR2: 00007efeac53d000 CR3: 0000000978c2c003
> CR4: 00000000003726e0
> [Fri May 26 09:16:35 2023] Call Trace:
> [Fri May 26 09:16:35 2023]  <TASK>
> [Fri May 26 09:16:35 2023]  ?
> __pfx_kvm_nx_huge_page_recovery_worker+0x10/0x10 [kvm]
> [Fri May 26 09:16:35 2023]  kvm_vm_worker_thread+0x106/0x1c0 [kvm]
> [Fri May 26 09:16:35 2023]  ? __pfx_kvm_vm_worker_thread+0x10/0x10 [kvm]
> [Fri May 26 09:16:35 2023]  kthread+0xd9/0x100
> [Fri May 26 09:16:35 2023]  ? __pfx_kthread+0x10/0x10
> [Fri May 26 09:16:35 2023]  ret_from_fork+0x2c/0x50
> [Fri May 26 09:16:35 2023]  </TASK>
> [Fri May 26 09:16:35 2023] ---[ end trace 0000000000000000 ]---

Thanks for the regression report. I'm adding it to regzbot:

#regzbot ^introduced: v6.3.1..v6.3.2
#regzbot title: WARNING trace at kvm_nx_huge_page_recovery_worker when opening a new tab in Chrome

Fabio, can you also check the mainline (on guest)?

-- 
An old man doll... just what I always wanted! - Clara

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