Hi,
there has been a thread referencing "field-spanning writes" recently:
https://www.spinics.net/lists/linux-bcache/msg11631.html
I understood this to be some kind of false positive, to be fixed in some
later relase of 6.1.x kernels.
Does the system become unusable or is this green-screen just a warning?
Regards
Matthias Ferdinand
On Thu, Feb 16, 2023 at 05:58:15PM +0100, Stefan Boehringer wrote:
> Dear bache maintainer,
>
> I would like to report a kernel panic for bcache that is unfortunately not
> reproducible. I get this error roughly once a week, resulting in a green
> screen on my system. Please let me know, if I can provide further
> information to fix the bug. Below dmesg output copy-pasted as instructed.
>
> Thank you, best,
>
> Stefan
>
>
> Feb 15 08:44:49.840548 myhost kernel: ------------[ cut here ]------------
>
> Feb 15 08:44:49.840614 myhost kernel: memcpy: detected field-spanning write
> (size 264) of single field "&i
> ->j" at drivers/md/bcache/journal.c:152 (size 240)
> Feb 15 08:44:49.840633 myhost kernel: WARNING: CPU: 7 PID: 755 at
> drivers/md/bcache/journal.c:152 journal_
> read_bucket+0x3df/0x490 [bcache]
> Feb 15 08:44:49.840649 myhost kernel: Modules linked in: snd_hwdep(+) kvm(+)
> snd_pcm videobuf2_vmalloc(+)
> videobuf2_memops snd_timer videobuf2_v4l2 sr_mod(+) snd real
> tek cdrom pcspkr efi_pstore k10temp videobuf2_common i2c_piix4
> hid_plantronics(+) irqbypass pcc_cpufreq(-) mdio_devres joydev soundcore
> cfg80211 libphy bcache tiny_power_button acpi_cpufreq button fuse configfs
> dmi_sysfs ip_tables x_tables btusb btrtl btbcm btintel btmtk bluetooth
> hid_generic uas ecdh_generic usbhid usb_storage rfkill amdgpu
> crct10dif_pclmul crc32_pclmul polyval_clmulni polyval_generic gf128mul
> drm_ttm_helper ttm ghash_clmulni_intel iommu_v2 xhci_pci gpu_sched
> sha512_ssse3 xhci_pci_renesas xhci_hcd drm_buddy aesni_intel
> drm_display_helper nvme crypto_simd usbcore cryptd cec ccp nvme_core
> sp5100_tco rc_core amd_sfh video wmi btrfs blake2b_generic libcrc32c
> crc32c_intel xor raid6_pq v4l2loopback(O) videodev mc sg dm_multipath dm_mod
> scsi_dh_rdac scsi_dh_emc scsi_dh_alua msr efivarfs
> Feb 15 08:44:49.840786 myhost kernel: CPU: 7 PID: 755 Comm: kworker/7:2
> Tainted: G O 6.1.10-1-default #1 openSUSE Tumbleweed
> 22576c8b47239465c1855ce27337697dac36c24c
> Feb 15 08:44:49.840809 myhost kernel: Hardware name: GIGABYTE
> GB-BRR7H-4800/GB-BRR7H-4800, BIOS F5 05/05/2021
> Feb 15 08:44:49.840827 myhost kernel: Workqueue: events
> register_cache_worker [bcache]
> Feb 15 08:44:49.840844 myhost kernel: RIP:
> 0010:journal_read_bucket+0x3df/0x490 [bcache]
> Feb 15 08:44:49.840860 myhost kernel: Code: 00 00 00 48 89 ee 48 c7 c2 70 c4
> cb c0 48 c7 c7 a8 c4 cb c0 4c 89 5c 24 48 48 89 44 24 20 c6 05 21 c8 02 00
> 01 e8 3e f5 65 f1 <0f> 0b 4c 8b 5c 24 48 48 8b 44 24 20 e9 6b ff ff ff 44 8b
> 74 24 54
> Feb 15 08:44:49.840884 myhost kernel: RSP: 0018:ffffb6fe01893c98 EFLAGS:
> 00010282
> Feb 15 08:44:49.840900 myhost kernel: RAX: 0000000000000000 RBX:
> ffff95ebc2a3c000 RCX: 0000000000000027
> Feb 15 08:44:49.840915 myhost kernel: RDX: ffff95f2af7e24e8 RSI:
> 0000000000000001 RDI: ffff95f2af7e24e0
> Feb 15 08:44:49.840932 myhost kernel: RBP: 0000000000000108 R08:
> 0000000000000000 R09: ffffb6fe01893b40
> Feb 15 08:44:49.840948 myhost kernel: R10: 0000000000000003 R11:
> ffff95f2cf2ff228 R12: dead000000000122
> Feb 15 08:44:49.840965 myhost kernel: R13: dead000000000100 R14:
> ffff95ebc46a8400 R15: ffffb6fe01893e08
> Feb 15 08:44:49.840981 myhost kernel: FS: 0000000000000000(0000)
> GS:ffff95f2af7c0000(0000) knlGS:0000000000000000
> Feb 15 08:44:49.840998 myhost kernel: CS: 0010 DS: 0000 ES: 0000 CR0:
> 0000000080050033
> Feb 15 08:44:49.841014 myhost kernel: CR2: 00007f166249afe0 CR3:
> 000000010323e000 CR4: 0000000000350ee0
> Feb 15 08:44:49.841030 myhost kernel: Call Trace:
> Feb 15 08:44:49.841047 myhost kernel: <TASK>
> Feb 15 08:44:49.841067 myhost kernel: ? bch_btree_exit+0x20/0x20 [bcache
> f7676faef63111511583961fa9b18ec07deb88c4]
> Feb 15 08:44:49.841090 myhost kernel: bch_journal_read+0x79/0x320 [bcache
> f7676faef63111511583961fa9b18ec07deb88c4]
> Feb 15 08:44:49.841108 myhost kernel: register_cache_worker+0x99f/0x11c0
> [bcache f7676faef63111511583961fa9b18ec07deb88c4]
> Feb 15 08:44:49.841125 myhost kernel: ?
> finish_task_switch.isra.0+0x90/0x2d0
> Feb 15 08:44:49.841141 myhost kernel: process_one_work+0x20c/0x3d0
> Feb 15 08:44:49.841157 myhost kernel: worker_thread+0x4a/0x3b0
> Feb 15 08:44:49.841173 myhost kernel: ? process_one_work+0x3d0/0x3d0
> Feb 15 08:44:49.841188 myhost kernel: kthread+0xd7/0x100
> Feb 15 08:44:49.841203 myhost kernel: ? kthread_complete_and_exit+0x20/0x20
> Feb 15 08:44:49.841219 myhost kernel: ret_from_fork+0x1f/0x30
> Feb 15 08:44:49.841236 myhost kernel: </TASK>
> Feb 15 08:44:49.841251 myhost kernel: ---[ end trace 0000000000000000 ]---
> Feb 15 08:44:49.848553 myhost kernel: sr 1:0:0:0: [sr0] scsi3-mmc drive:
> 24x/24x writer dvd-ram cd/rw xa/form2 cdda tray
> Feb 15 08:44:49.848843 myhost kernel: cdrom: Uniform CD-ROM driver Revision:
> 3.20
> Feb 15 08:44:49.872544 myhost kernel: plantronics 0003:047F:1200.0004:
> input,hiddev96,hidraw3: USB HID v1.11 Device [Plantronics Plantronics
> Calisto 7200] on usb-0000:04:00.0-2.4/input3
> Feb 15 08:44:49.876547 myhost kernel: sr 1:0:0:0: Attached scsi CD-ROM sr0
> Feb 15 08:44:49.880540 myhost kernel: ------------[ cut here ]------------
