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While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:

apport-collect 2012661

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/2012661

Title:
  kernel BUG at lib/assoc_array.c:652!

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I am seeing this in Ubuntu 22.04 with kernel 5.15.0-67.74:

  Mar 23 12:38:32 box kernel: [13399.080589] ------------[ cut here 
]------------
  Mar 23 12:38:32 box kernel: [13399.080596] kernel BUG at 
lib/assoc_array.c:652!
  Mar 23 12:38:32 box kernel: [13399.082833] invalid opcode: 0000 [#1] SMP PTI
  Mar 23 12:38:32 box kernel: [13399.084912] CPU: 27 PID: 3746279 Comm: 
kworker/27:3 Tainted: G           OE     5.15.0-67-generic #74-Ubuntu
  Mar 23 12:38:32 box kernel: [13399.087091] Hardware name: HP ProLiant DL380 
Gen9/ProLiant DL380 Gen9, BIOS P89 07/18/2022
  Mar 23 12:38:32 box kernel: [13399.089195] Workqueue: cifsiod 
cifs_resolve_server [cifs]
  Mar 23 12:38:32 box kernel: [13399.091379] RIP: 
0010:assoc_array_insert_into_terminal_node.isra.0+0x806/0xc20
  Mar 23 12:38:32 box kernel: [13399.093480] Code: 4c 63 e2 44 8d 6a 01 49 83 
fc 10 0f 87 d7 01 00 00 4c 8b 4d b8 44 89 ea 4b 8d 4c e1 10 e9 a7 fc ff ff 0f 
0b 0f 0b 0f 0b 0f 0b <0f> 0b 0f 0b 48 c7 c7 e0 cf 4b 9c e8 ba 37 03 00 e9 53 f8 
ff ff 0f
  Mar 23 12:38:32 box kernel: [13399.097735] RSP: 0018:ffffc08e7a66fa20 EFLAGS: 
00010286
  Mar 23 12:38:32 box kernel: [13399.099790] RAX: 0000000000000002 RBX: 
00000000ffffffff RCX: 0000000000000001
  Mar 23 12:38:32 box kernel: [13399.101871] RDX: ffff9d2275968000 RSI: 
000000000000000f RDI: 0000000000000001
  Mar 23 12:38:32 box kernel: [13399.103963] RBP: ffffc08e7a66faa0 R08: 
ffff9d31e7cbda00 R09: ffff9d2275969b00
  Mar 23 12:38:32 box kernel: [13399.106111] R10: ffff9cb6cfc93800 R11: 
000000000000000c R12: 0000000000000001
  Mar 23 12:38:32 box kernel: [13399.108209] R13: 000000000000000f R14: 
0000000000000000 R15: ffff9d2275969b00
  Mar 23 12:38:32 box kernel: [13399.110292] FS:  0000000000000000(0000) 
GS:ffff9d14bfc40000(0000) knlGS:0000000000000000
  Mar 23 12:38:32 box kernel: [13399.112355] CS:  0010 DS: 0000 ES: 0000 CR0: 
0000000080050033
  Mar 23 12:38:32 box kernel: [13399.114411] CR2: 00007f3a9b9e4a58 CR3: 
00000012c8810005 CR4: 00000000001706e0
  Mar 23 12:38:32 box kernel: [13399.116461] Call Trace:
  Mar 23 12:38:32 box kernel: [13399.118452]  <TASK>
  Mar 23 12:38:32 box kernel: [13399.120455]  assoc_array_insert+0x153/0x170
  Mar 23 12:38:32 box kernel: [13399.122422]  ? _raw_spin_lock+0x22/0x30
  Mar 23 12:38:32 box kernel: [13399.124357]  ? key_alloc+0x2e6/0x550
  Mar 23 12:38:32 box kernel: [13399.126273]  __key_link_begin+0x4c/0xb0
  Mar 23 12:38:32 box kernel: [13399.128153]  construct_alloc_key+0xdb/0x270
  Mar 23 12:38:32 box kernel: [13399.130032]  request_key_and_link+0x22c/0x320
  Mar 23 12:38:32 box kernel: [13399.131867]  ? dns_resolver_read+0x30/0x30
  Mar 23 12:38:32 box kernel: [13399.133689]  ? key_default_cmp+0x30/0x30
  Mar 23 12:38:32 box kernel: [13399.135469]  request_key_tag+0x49/0x90
  Mar 23 12:38:32 box kernel: [13399.137241]  dns_query+0x13d/0x250
  Mar 23 12:38:32 box kernel: [13399.138989]  
dns_resolve_server_name_to_ip+0xb7/0x310 [cifs]
  Mar 23 12:38:32 box kernel: [13399.141130]  ? scnprintf+0x4d/0x90
  Mar 23 12:38:32 box kernel: [13399.142866]  
reconn_set_ipaddr_from_hostname+0x86/0x2b0 [cifs]
  Mar 23 12:38:32 box kernel: [13399.144654]  ? 
finish_task_switch.isra.0+0x7e/0x280
  Mar 23 12:38:32 box kernel: [13399.146412]  cifs_resolve_server+0x2c/0x90 
[cifs]
  Mar 23 12:38:32 box kernel: [13399.148176]  process_one_work+0x22b/0x3d0
  Mar 23 12:38:32 box kernel: [13399.149845]  worker_thread+0x53/0x420
  Mar 23 12:38:32 box kernel: [13399.151459]  ? process_one_work+0x3d0/0x3d0
  Mar 23 12:38:32 box kernel: [13399.153061]  kthread+0x12a/0x150
  Mar 23 12:38:32 box kernel: [13399.154631]  ? set_kthread_struct+0x50/0x50
  Mar 23 12:38:32 box kernel: [13399.156181]  ret_from_fork+0x22/0x30
  Mar 23 12:38:32 box kernel: [13399.157716]  </TASK>
  Mar 23 12:38:32 box kernel: [13399.159565] Modules linked in: xt_REDIRECT 
xt_state ip_vs_rr xt_ipvs ip_vs vxlan ip6_udp_tunnel udp_tunnel xt_policy 
xt_mark xt_u32 veth xt_nat xt_tcpudp xt_conntrack nft_chain_nat xt_MASQUERADE 
nf_nat nf_conntrack_netlink nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 
xfrm_user xfrm_algo nft_counter xt_addrtype nft_compat nf_tables nfnetlink 
br_netfilter bridge stp llc cmac nls_utf8 cifs cifs_arc4 cifs_md4 binfmt_misc 
nfsv3 rpcsec_gss_krb5 nfsv4 nfs fscache netfs cpuid eset_rtp(OE-) overlay hpwdt 
nls_iso8859_1 intel_rapl_msr intel_rapl_common sb_edac ipmi_ssif 
x86_pkg_temp_thermal intel_powerclamp kvm_intel kvm crct10dif_pclmul 
ghash_clmulni_intel aesni_intel crypto_simd cryptd rapl intel_cstate mgag200 
drm_kms_helper cec rc_core i2c_algo_bit fb_sys_fops syscopyarea sysfillrect 
ioatdma input_leds joydev hpilo sysimgblt dca acpi_ipmi ipmi_si ipmi_devintf 
ipmi_msghandler acpi_tad acpi_power_meter mac_hid sch_fq_codel dm_multipath 
scsi_dh_rdac scsi_dh_emc s
 csi_dh_alua coretemp lp parport
  Mar 23 12:38:32 box kernel: [13399.159693]  ramoops reed_solomon pstore_blk 
pstore_zone efi_pstore drm nfsd nfs_acl lockd auth_rpcgss grace sunrpc 
ip_tables x_tables autofs4 btrfs blake2b_generic xor zstd_compress raid6_pq 
hid_generic bnx2x usbhid nvme i2c_i801 hpsa ahci xhci_pci mdio crc32_pclmul hid 
libahci lpc_ich tg3 i2c_smbus nvme_core xhci_pci_renesas scsi_transport_sas 
libcrc32c wmi
  Mar 23 12:38:32 box kernel: [13399.179701] ---[ end trace 2ef4625ad06f1cf9 
]---
  Mar 23 12:38:32 box kernel: [13399.194447] RIP: 
0010:assoc_array_insert_into_terminal_node.isra.0+0x806/0xc20
  Mar 23 12:38:32 box kernel: [13399.195804] Code: 4c 63 e2 44 8d 6a 01 49 83 
fc 10 0f 87 d7 01 00 00 4c 8b 4d b8 44 89 ea 4b 8d 4c e1 10 e9 a7 fc ff ff 0f 
0b 0f 0b 0f 0b 0f 0b <0f> 0b 0f 0b 48 c7 c7 e0 cf 4b 9c e8 ba 37 03 00 e9 53 f8 
ff ff 0f
  Mar 23 12:38:32 box kernel: [13399.198454] RSP: 0018:ffffc08e7a66fa20 EFLAGS: 
00010286
  Mar 23 12:38:32 box kernel: [13399.199789] RAX: 0000000000000002 RBX: 
00000000ffffffff RCX: 0000000000000001
  Mar 23 12:38:32 box kernel: [13399.201169] RDX: ffff9d2275968000 RSI: 
000000000000000f RDI: 0000000000000001
  Mar 23 12:38:32 box kernel: [13399.202543] RBP: ffffc08e7a66faa0 R08: 
ffff9d31e7cbda00 R09: ffff9d2275969b00
  Mar 23 12:38:32 box kernel: [13399.203923] R10: ffff9cb6cfc93800 R11: 
000000000000000c R12: 0000000000000001
  Mar 23 12:38:32 box kernel: [13399.205327] R13: 000000000000000f R14: 
0000000000000000 R15: ffff9d2275969b00
  Mar 23 12:38:32 box kernel: [13399.206740] FS:  0000000000000000(0000) 
GS:ffff9d14bfc40000(0000) knlGS:0000000000000000
  Mar 23 12:38:32 box kernel: [13399.208166] CS:  0010 DS: 0000 ES: 0000 CR0: 
0000000080050033
  Mar 23 12:38:32 box kernel: [13399.209633] CR2: 00007f3a9b9e4a58 CR3: 
00000012c8810005 CR4: 00000000001706e0

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