==========================================================
Example for Kernel "6.5.0-1014-raspi #17-Ubuntu" (aarch64)
==========================================================
# lsb_release -rd
No LSB modules are available.
Description:    Ubuntu 23.10
Release:        23.10

# uname -a
Linux fpgrpi 6.5.0-1014-raspi #17-Ubuntu SMP PREEMPT_DYNAMIC Thu Mar 21 
11:24:03 UTC 2024 aarch64 aarch64 aarch64 GNU/Linux

# cat /proc/version_signature
Ubuntu 6.5.0-1014.17-raspi 6.5.13

----------------------------
How to reproduce the problem
----------------------------
For instance, I'm using KeePassXC 
(https://launchpad.net/ubuntu/+source/keepassxc) to update a database located 
at CIFS filesystem. Any change done to that database causes this Kernel error 
exception:

abr 11 09:11:02 fpgrpi kernel: Unable to handle kernel paging request at 
virtual address fffffffffffffffe
abr 11 09:11:02 fpgrpi kernel: Mem abort info:
abr 11 09:11:02 fpgrpi kernel:   ESR = 0x0000000096000004
abr 11 09:11:02 fpgrpi kernel:   EC = 0x25: DABT (current EL), IL = 32 bits
abr 11 09:11:02 fpgrpi kernel:   SET = 0, FnV = 0
abr 11 09:11:02 fpgrpi kernel:   EA = 0, S1PTW = 0
abr 11 09:11:02 fpgrpi kernel:   FSC = 0x04: level 0 translation fault
abr 11 09:11:02 fpgrpi kernel: Data abort info:
abr 11 09:11:02 fpgrpi kernel:   ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000
abr 11 09:11:02 fpgrpi kernel:   CM = 0, WnR = 0, TnD = 0, TagAccess = 0
abr 11 09:11:02 fpgrpi kernel:   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
abr 11 09:11:02 fpgrpi kernel: swapper pgtable: 4k pages, 48-bit VAs, 
pgdp=0000000001498000
abr 11 09:11:02 fpgrpi kernel: [fffffffffffffffe] pgd=0000000000000000, 
p4d=0000000000000000
abr 11 09:11:02 fpgrpi kernel: Internal error: Oops: 0000000096000004 [#1] 
PREEMPT SMP
abr 11 09:11:02 fpgrpi kernel: Modules linked in: rfcomm snd_seq_dummy 
snd_hrtimer snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device 
nls_utf8 cifs cifs_arc4 cifs_md4 fscache netfs cmac algif_hash algif_skcipher 
af_alg bnep lz4 lz4_compress zram zsmalloc nft_chain_nat nf_nat sunrpc 
xt_tcpudp xt_conntrack nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 binfmt_misc 
nft_compat nf_tables nfnetlink brcmfmac_wcc btsdio brcmfmac vc4 brcmutil 
snd_soc_hdmi_codec hci_uart cfg80211 drm_display_helper btqca btrtl 
raspberrypi_hwmon cec drm_dma_helper btbcm btintel bluetooth 
raspberrypi_gpiomem drm_kms_helper ecdh_generic rfkill ecc snd_soc_core 
bcm2835_v4l2(CE) bcm2835_codec(CE) bcm2835_isp(CE) bcm2835_mmal_vchiq(CE) 
snd_compress ac97_bus snd_pcm_dmaengine rpivid_hevc(CE) vc_sm_cma(CE) 
snd_bcm2835(CE) v4l2_mem2mem videobuf2_vmalloc videobuf2_dma_contig 
videobuf2_memops videobuf2_v4l2 videodev videobuf2_common mc snd_pcm snd_timer 
joydev nvmem_rmem input_leds uio_pdrv_genirq uio tcp_bbr sch_fq ecryptfs 
parport_pc ppdev lp parport fuse
abr 11 09:11:02 fpgrpi kernel:  ip_tables x_tables autofs4 btrfs 
blake2b_generic raid10 hid_generic raid456 async_raid6_recov async_memcpy 
async_pq async_xor async_tx usbhid xor xor_neon uas usb_storage raid6_pq 
libcrc32c raid1 raid0 multipath linear md_mod dm_mirror dm_region_hash dm_log 
dm_mod dax zstd z3fold spidev dwc2 v3d gpu_sched drm_shmem_helper drm roles 
crct10dif_ce drm_panel_orientation_quirks i2c_brcmstb udc_core i2c_bcm2835 
xhci_pci xhci_pci_renesas spi_bcm2835 snd backlight phy_generic aes_arm64
abr 11 09:11:02 fpgrpi kernel: CPU: 3 PID: 79549 Comm: Thread (pooled) Tainted: 
G         C  E      6.5.0-1014-raspi #17-Ubuntu
abr 11 09:11:02 fpgrpi kernel: Hardware name: Raspberry Pi 4 Model B Rev 1.4 
(DT)
abr 11 09:11:02 fpgrpi kernel: pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT 
-SSBS BTYPE=--)
abr 11 09:11:02 fpgrpi kernel: pc : cifs_flush_folio+0x5c/0x160 [cifs]
abr 11 09:11:02 fpgrpi kernel: lr : cifs_flush_folio+0x50/0x160 [cifs]
abr 11 09:11:02 fpgrpi kernel: sp : ffff80008d00bb30
abr 11 09:11:02 fpgrpi kernel: x29: ffff80008d00bb30 x28: 0000000000000000 x27: 
ffff6cb892a49000
abr 11 09:11:02 fpgrpi kernel: x26: ffff6cb88fff9200 x25: ffff6cb92bd1c350 x24: 
0000000000000000
abr 11 09:11:02 fpgrpi kernel: x23: 0000000000000001 x22: ffff80008d00bba8 x21: 
ffff80008d00bbb0
abr 11 09:11:02 fpgrpi kernel: x20: 0000000000000000 x19: fffffffffffffffe x18: 
0000000000000000
abr 11 09:11:02 fpgrpi kernel: x17: 0000000000000000 x16: ffffb6bfe450e050 x15: 
0000000000000000
abr 11 09:11:02 fpgrpi kernel: x14: 0000000000000000 x13: 0000000000000000 x12: 
0000000000000000
abr 11 09:11:02 fpgrpi kernel: x11: 0000000000000000 x10: 0000000000000000 x9 : 
ffffb6bfe450df28
abr 11 09:11:02 fpgrpi kernel: x8 : ffff80008d00bad8 x7 : 0000000000000000 x6 : 
0000000000023854
abr 11 09:11:02 fpgrpi kernel: x5 : ffff6cb887d82080 x4 : 0000000000001000 x3 : 
0000000000000000
abr 11 09:11:02 fpgrpi kernel: x2 : 0000000000000000 x1 : 0000000000000001 x0 : 
fffffffffffffffe
abr 11 09:11:02 fpgrpi kernel: Call trace:
abr 11 09:11:02 fpgrpi kernel:  cifs_flush_folio+0x5c/0x160 [cifs]
abr 11 09:11:02 fpgrpi kernel:  cifs_remap_file_range+0x140/0x678 [cifs]
abr 11 09:11:02 fpgrpi kernel:  do_clone_file_range+0xe0/0x270
abr 11 09:11:02 fpgrpi kernel:  vfs_clone_file_range+0x68/0x258
abr 11 09:11:02 fpgrpi kernel:  ioctl_file_clone+0x64/0xd8
abr 11 09:11:02 fpgrpi kernel:  do_vfs_ioctl+0x6c8/0x978
abr 11 09:11:02 fpgrpi kernel:  __arm64_sys_ioctl+0x90/0x100
abr 11 09:11:02 fpgrpi kernel:  invoke_syscall+0x50/0x120
abr 11 09:11:02 fpgrpi kernel:  el0_svc_common.constprop.0+0x6c/0x140
abr 11 09:11:02 fpgrpi kernel:  do_el0_svc+0x34/0x50
abr 11 09:11:02 fpgrpi kernel:  el0_svc+0x30/0xc8
abr 11 09:11:02 fpgrpi kernel:  el0t_64_sync_handler+0x120/0x130
abr 11 09:11:02 fpgrpi kernel:  el0t_64_sync+0x1a8/0x1b0
abr 11 09:11:02 fpgrpi kernel: Code: 94021742 b4000540 aa0003f3 d2820004 
(f9400000) 
abr 11 09:11:02 fpgrpi kernel: ---[ end trace 0000000000000000 ]---

After that error the CIFS filesystem just became unusable.

** Summary changed:

- Remote filesystems mounted as CIFS not working after update to Kernel 
"6.5.0-27-generic #28-Ubuntu"
+ Remote filesystems mounted as CIFS not working after update to Kernel 
"6.5.0-27-generic #28-Ubuntu" (amd64) or Kernel "6.5.0-1014-raspi #17-Ubuntu" 
(aarch64).

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2060919

Title:
  Remote filesystems mounted as CIFS not working after update to Kernel
  "6.5.0-27-generic #28-Ubuntu" (amd64) or Kernel "6.5.0-1014-raspi
  #17-Ubuntu" (aarch64).

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