apport information

** Tags added: apport-collected noble

** Description changed:

  Kernel 6.11-24-generic on Ubuntu 24.04 freezes (partially) some time
  after boot (I've seen anything from 5 minutes to 3.5 hours).  This did
  not happen on 6.11.0-21-generic, which I ran for a couple or weeks
  without issue, nor any other earlier version.
  
  This is on a Dell R7515 server with an AMD EPYC 7302P CPU; in case it's
  relevant I use ZFS.
  
  When it freezes, the console prints a warning:
  
  [12158.380885] ------------[ cut here ]------------
  [12158.386332] WARNING: CPU: 0 PID: 0 at kernel/time/timer_migration.c:543 
tmigr_cpu_new_timer+0x1c9/0x230
  [12158.396381] Modules linked in: tcp_diag inet_diag bonding tls cfg80211 
binfmt_misc ip6t_REJECT nf_reject_ipv6 xt_tcpudp ipt_REJECT f_reject_ipv4 
xt_set nft_compat nf_tables ip_set_hash_net ip_set nls_iso8859_1 amd_atl 
intel_rapl_msr intel_rapl_common amd64_edac eda_mce_amd dell_pc 
platform_profile kvm_amd kvm dell_wmi ee1004 ses video enclosure dell_smbios 
sparse_keymap i2c_piix4 ccp rapl scsi_trnsport_sas ptdma wmi_bmof k10temp 
cdc_acm dcdbas dell_wmi_descriptor i2c_algo_bit i2c_smbus ipmi_ssif 
acpi_power_meter mac_hid sch_fq_odel dm_multipath acpi_ipmi ipmi_si 
ipmi_devintf ipmi_msghandler efi_pstore nfsd auth_rpcgss nfs_acl lockd grace 
sunrpc nfnetlink dmi_ysfs ip_tables x_tables autofs4 zfs(PO) spl(O) btrfs 
blake2b_generic raid10 raid456 async_raid6_recov async_memcpy async_pq 
async_xor sync_tx xor raid6_pq libcrc32c raid0 cdc_ether usbnet mii raid1 uas 
usb_storage crct10dif_pclmul crc32_pclmul polyval_clmulni polyval_eneric 
ghash_clmulni_intel sfc sha256_ssse3 mtd ahci xhci_
 pci sha1_ssse3 tg3 libahci
  [12158.396678]  megaraid_sas mdio xhci_pci_renesas wmi aesni_intel 
crypto_simd cryptd
  [12158.501416] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: P        W  O    
   6.11.0-24-generic #24~24.04.1-Ubuntu
  [12158.512627] Tainted: [P]=PROPRIETARY_MODULE, [W]=WARN, [O]=OOT_MODULE
  
  The freeze affects some things but not others.  My existing SSH
  connection and tmux continue to work (mostly; tmux freezes
  intermittently and *usually* recovers after a minute or so...though
  eventually it seems to get stuck forever).  New SSH connections do not
  succeed; the TCP connection establishes and SSH starts to negotiate, but
  it gets stuck during authentication.  Some commands such as "ps aux"
  freeze indefinitely, or freeze for a while.  My serial console's getty
  and the VGA console both stop responding entirely (no response to
  pressing enter).  The above warning only makes it to the serial console,
  not VGA.
  
  strace'ing "ps aux" shows that it freezes (seemingly forever) whilst
  reading from procfs:
  
  openat(AT_FDCWD, "/proc/4/stat", O_RDONLY) = 4
  read(4,
  
  PID 4 is some kernel thread but I'm not sure what.
  
  Let me know if there's anything else I can usefully provide.
+ --- 
+ ProblemType: Bug
+ AlsaDevices:
+  total 0
+  crw-rw---- 1 root audio 116,  1 Apr 23 15:23 seq
+  crw-rw---- 1 root audio 116, 33 Apr 23 15:23 timer
+ AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
+ ApportVersion: 2.28.1-0ubuntu3.5
+ Architecture: amd64
+ ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
+ AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', 
'/dev/snd/timer'] failed with exit code 1:
+ CRDA: N/A
+ CasperMD5CheckResult: unknown
+ DistroRelease: Ubuntu 24.04
+ HibernationDevice: RESUME=none
+ IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
+ MachineType: Dell Inc. PowerEdge R7515
+ NonfreeKernelModules: zfs
+ Package: linux (not installed)
+ PciMultimedia:
+  
+ ProcEnviron:
+  LANG=en_GB.UTF-8
+  PATH=(custom, no user)
+  SHELL=/bin/bash
+  TERM=tmux-256color
+ ProcFB: 0 simpledrmdrmfb
+ ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.11.0-24-generic 
root=ZFS=otsillac_ssd/ROOT ro nordrand random.trust_cpu=0 console=tty0 
console=ttyS0,115200n8 nomodeset
+ ProcVersionSignature: Ubuntu 6.11.0-24.24~24.04.1-generic 6.11.11
+ RelatedPackageVersions:
+  linux-restricted-modules-6.11.0-24-generic N/A
+  linux-backports-modules-6.11.0-24-generic  N/A
+  linux-firmware                             20240318.git3b128b60-0ubuntu2.11
+ RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
+ Tags: noble
+ Uname: Linux 6.11.0-24-generic x86_64
+ UnreportableReason: This report is about a package that is not installed.
+ UpgradeStatus: Upgraded to noble on 2024-05-19 (339 days ago)
+ UserGroups: N/A
+ _MarkForUpload: False
+ dmi.bios.date: 02/03/2025
+ dmi.bios.release: 2.18
+ dmi.bios.vendor: Dell Inc.
+ dmi.bios.version: 2.18.1
+ dmi.board.name: 0J9WRD
+ dmi.board.vendor: Dell Inc.
+ dmi.board.version: A02
+ dmi.chassis.type: 23
+ dmi.chassis.vendor: Dell Inc.
+ dmi.modalias: 
dmi:bvnDellInc.:bvr2.18.1:bd02/03/2025:br2.18:svnDellInc.:pnPowerEdgeR7515:pvr:rvnDellInc.:rn0J9WRD:rvrA02:cvnDellInc.:ct23:cvr:skuSKU=08FD;ModelName=PowerEdgeR7515:
+ dmi.product.family: PowerEdge
+ dmi.product.name: PowerEdge R7515
+ dmi.product.sku: SKU=08FD;ModelName=PowerEdge R7515
+ dmi.sys.vendor: Dell Inc.

** Attachment added: "CurrentDmesg.txt"
   
https://bugs.launchpad.net/bugs/2107668/+attachment/5873784/+files/CurrentDmesg.txt

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/2107668

Title:
  kernel 6.11.0-24-generic regression: freeze after minutes/hours;
  timer_migration warning

Status in linux package in Ubuntu:
  New
Status in linux source package in Noble:
  New

Bug description:
  Kernel 6.11-24-generic on Ubuntu 24.04 freezes (partially) some time
  after boot (I've seen anything from 5 minutes to 3.5 hours).  This did
  not happen on 6.11.0-21-generic, which I ran for a couple or weeks
  without issue, nor any other earlier version.

  This is on a Dell R7515 server with an AMD EPYC 7302P CPU; in case
  it's relevant I use ZFS.

  When it freezes, the console prints a warning:

  [12158.380885] ------------[ cut here ]------------
  [12158.386332] WARNING: CPU: 0 PID: 0 at kernel/time/timer_migration.c:543 
tmigr_cpu_new_timer+0x1c9/0x230
  [12158.396381] Modules linked in: tcp_diag inet_diag bonding tls cfg80211 
binfmt_misc ip6t_REJECT nf_reject_ipv6 xt_tcpudp ipt_REJECT f_reject_ipv4 
xt_set nft_compat nf_tables ip_set_hash_net ip_set nls_iso8859_1 amd_atl 
intel_rapl_msr intel_rapl_common amd64_edac eda_mce_amd dell_pc 
platform_profile kvm_amd kvm dell_wmi ee1004 ses video enclosure dell_smbios 
sparse_keymap i2c_piix4 ccp rapl scsi_trnsport_sas ptdma wmi_bmof k10temp 
cdc_acm dcdbas dell_wmi_descriptor i2c_algo_bit i2c_smbus ipmi_ssif 
acpi_power_meter mac_hid sch_fq_odel dm_multipath acpi_ipmi ipmi_si 
ipmi_devintf ipmi_msghandler efi_pstore nfsd auth_rpcgss nfs_acl lockd grace 
sunrpc nfnetlink dmi_ysfs ip_tables x_tables autofs4 zfs(PO) spl(O) btrfs 
blake2b_generic raid10 raid456 async_raid6_recov async_memcpy async_pq 
async_xor sync_tx xor raid6_pq libcrc32c raid0 cdc_ether usbnet mii raid1 uas 
usb_storage crct10dif_pclmul crc32_pclmul polyval_clmulni polyval_eneric 
ghash_clmulni_intel sfc sha256_ssse3 mtd ahci xhci_
 pci sha1_ssse3 tg3 libahci
  [12158.396678]  megaraid_sas mdio xhci_pci_renesas wmi aesni_intel 
crypto_simd cryptd
  [12158.501416] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: P        W  O    
   6.11.0-24-generic #24~24.04.1-Ubuntu
  [12158.512627] Tainted: [P]=PROPRIETARY_MODULE, [W]=WARN, [O]=OOT_MODULE

  The freeze affects some things but not others.  My existing SSH
  connection and tmux continue to work (mostly; tmux freezes
  intermittently and *usually* recovers after a minute or so...though
  eventually it seems to get stuck forever).  New SSH connections do not
  succeed; the TCP connection establishes and SSH starts to negotiate,
  but it gets stuck during authentication.  Some commands such as "ps
  aux" freeze indefinitely, or freeze for a while.  My serial console's
  getty and the VGA console both stop responding entirely (no response
  to pressing enter).  The above warning only makes it to the serial
  console, not VGA.

  strace'ing "ps aux" shows that it freezes (seemingly forever) whilst
  reading from procfs:

  openat(AT_FDCWD, "/proc/4/stat", O_RDONLY) = 4
  read(4,

  PID 4 is some kernel thread but I'm not sure what.

  Let me know if there's anything else I can usefully provide.
  --- 
  ProblemType: Bug
  AlsaDevices:
   total 0
   crw-rw---- 1 root audio 116,  1 Apr 23 15:23 seq
   crw-rw---- 1 root audio 116, 33 Apr 23 15:23 timer
  AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
  ApportVersion: 2.28.1-0ubuntu3.5
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', 
'/dev/snd/timer'] failed with exit code 1:
  CRDA: N/A
  CasperMD5CheckResult: unknown
  DistroRelease: Ubuntu 24.04
  HibernationDevice: RESUME=none
  IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
  MachineType: Dell Inc. PowerEdge R7515
  NonfreeKernelModules: zfs
  Package: linux (not installed)
  PciMultimedia:
   
  ProcEnviron:
   LANG=en_GB.UTF-8
   PATH=(custom, no user)
   SHELL=/bin/bash
   TERM=tmux-256color
  ProcFB: 0 simpledrmdrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.11.0-24-generic 
root=ZFS=otsillac_ssd/ROOT ro nordrand random.trust_cpu=0 console=tty0 
console=ttyS0,115200n8 nomodeset
  ProcVersionSignature: Ubuntu 6.11.0-24.24~24.04.1-generic 6.11.11
  RelatedPackageVersions:
   linux-restricted-modules-6.11.0-24-generic N/A
   linux-backports-modules-6.11.0-24-generic  N/A
   linux-firmware                             20240318.git3b128b60-0ubuntu2.11
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
  Tags: noble
  Uname: Linux 6.11.0-24-generic x86_64
  UnreportableReason: This report is about a package that is not installed.
  UpgradeStatus: Upgraded to noble on 2024-05-19 (339 days ago)
  UserGroups: N/A
  _MarkForUpload: False
  dmi.bios.date: 02/03/2025
  dmi.bios.release: 2.18
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 2.18.1
  dmi.board.name: 0J9WRD
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A02
  dmi.chassis.type: 23
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvr2.18.1:bd02/03/2025:br2.18:svnDellInc.:pnPowerEdgeR7515:pvr:rvnDellInc.:rn0J9WRD:rvrA02:cvnDellInc.:ct23:cvr:skuSKU=08FD;ModelName=PowerEdgeR7515:
  dmi.product.family: PowerEdge
  dmi.product.name: PowerEdge R7515
  dmi.product.sku: SKU=08FD;ModelName=PowerEdge R7515
  dmi.sys.vendor: Dell Inc.

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