Unpatched return thunk in use. This should not happen!

Issue

• The warning message is displayed as below:

[   28.286186] dsa_filter_hook: loading out-of-tree module taints kernel.
[   28.311219] dsa_filter: module license 'Proprietary' taints kernel.
[   28.311241] Disabling lock debugging due to kernel taint
[   28.311252] dsa_filter: module license taints kernel.
[   28.350807] block dm-0: the capability attribute has been deprecated.
[   28.358309] ------------[ cut here ]------------
[   28.358325] Unpatched return thunk in use. This should not happen!
[   28.358338] WARNING: CPU: 48 PID: 5620 at arch/x86/kernel/cpu/bugs.c:3108 __warn_thunk+0x26/0x30
[   28.358347] Modules linked in: dsa_filter(PO+) dsa_filter_hook(O) bonding tls rfkill vfat fat intel_rapl_msr intel_rapl_common intel_uncore_frequency intel_uncore_frequency_common intel_ifs nfit libnvdimm x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel ipmi_ssif kvm mgag200 i2c_algo_bit pmt_telemetry cxl_acpi rapl isst_if_mmio isst_if_mbox_pci intel_sdsi pmt_class intel_cstate drm_shmem_helper mei_me cxl_port acpi_power_meter ipmi_si ses acpi_ipmi intel_uncore cxl_core ipmi_devintf pcspkr enclosure isst_if_common intel_vsec hpilo drm_kms_helper mei acpi_tad ipmi_msghandler joydev einj fuse drm xfs libcrc32c sd_mod sg qla2xxx nvme_fc nvme_fabrics qat_4xxx qede iaa_crypto(X) nvme_keyring intel_qat crct10dif_pclmul qed nvme_core crc32_pclmul smartpqi idxd crc32c_intel nvme_auth ghash_clmulni_intel scsi_transport_fc scsi_transport_sas idxd_bus wmi hpwdt crc8 dm_mirror dm_region_hash dm_log dm_mod
[   28.358370] CPU: 48 PID: 5620 Comm: insmod Tainted: P           O   X  -------  ---  5.14.0-570.18.1.el9_6.x86_64 #1
[   28.358372] Hardware name: HPE Synergy 480 Gen11/Synergy 480 Gen11 Compute Module, BIOS 2.50 04/22/2025
[   28.358373] RIP: 0010:__warn_thunk+0x26/0x30
[   28.358376] Code: 90 90 90 90 0f 1f 44 00 00 80 3d 3f d4 2f 02 00 74 05 c3 cc cc cc cc 48 c7 c7 58 69 c5 ac c6 05 2a d4 2f 02 01 e8 fa 1d 0c 00 <0f> 0b c3 cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90
[   28.358377] RSP: 0018:ff632aaca0e23c90 EFLAGS: 00010282
[   28.358379] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000027
[   28.358380] RDX: 0000000000000027 RSI: 00000000fffeffff RDI: ff44c5dfbe4208c8
[   28.358381] RBP: ff632aaca0e23ce0 R08: 0000000000000000 R09: ff632aaca0e23b38
[   28.358382] R10: ff632aaca0e23b30 R11: ff44c5e03fdb3fe8 R12: ff44c5a0d2b39fc0
[   28.358383] R13: 0000560e5e00a962 R14: ff44c5c056b2c978 R15: ffffffffae46dda8
[   28.358384] FS:  00007fca921f3b80(0000) GS:ff44c5dfbe400000(0000) knlGS:0000000000000000
[   28.358385] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   28.358386] CR2: 0000560e5dfffbd0 CR3: 00000020dbb06005 CR4: 0000000000773ef0
[   28.358387] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   28.358388] DR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400
[   28.358388] PKRU: 55555554
[   28.358389] Call Trace:
[   28.358390]  <TASK>
[   28.358391]  ? show_trace_log_lvl+0x1c4/0x2df
[   28.358397]  ? show_trace_log_lvl+0x1c4/0x2df
[   28.358399]  ? warn_thunk_thunk+0x16/0x30
[   28.358403]  ? __warn_thunk+0x26/0x30
[   28.358405]  ? __warn+0x7e/0xd0
[   28.358409]  ? __warn_thunk+0x26/0x30
[   28.358411]  ? report_bug+0x100/0x140
[   28.358415]  ? prb_read_valid+0x17/0x20
[   28.358420]  ? handle_bug+0x3c/0x70
[   28.358424]  ? exc_invalid_op+0x14/0x70
[   28.358425]  ? asm_exc_invalid_op+0x16/0x20
[   28.358431]  ? __warn_thunk+0x26/0x30
[   28.358432]  warn_thunk_thunk+0x16/0x30
[   28.358434]  ? do_init_module+0x23/0x230
[   28.358439]  ? __pfx_init_module+0x10/0x10 [dsa_filter]
[   28.358457]  dsa_init+0x15/0xff0 [dsa_filter]
[   28.358474]  ? __pfx_init_module+0x10/0x10 [dsa_filter]
[   28.358490]  do_one_initcall+0x41/0x210
[   28.358494]  do_init_module+0x64/0x230
[   28.358496]  init_module_from_file+0x8b/0xd0
[   28.358499]  idempotent_init_module+0x17e/0x230
[   28.358501]  __x64_sys_finit_module+0x5a/0xb0
[   28.358503]  do_syscall_64+0x5c/0xe0
[   28.358504]  ? exc_page_fault+0x62/0x150
[   28.358508]  entry_SYSCALL_64_after_hwframe+0x78/0x80
[   28.358510] RIP: 0033:0x7fca9170764d
[   28.358512] Code: 5b 41 5c c3 66 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 9b 17 0f 00 f7 d8 64 89 01 48
[   28.358513] RSP: 002b:00007ffe150e9d78 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[   28.358513] RAX: ffffffffffffffda RBX: 0000560e5e441860 RCX: 00007fca9170764d
[   28.358514] RDX: 0000000000000000 RSI: 0000560e5e00a962 RDI: 0000000000000006
[   28.358515] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[   28.358516] R10: 0000000000000006 R11: 0000000000000246 R12: 0000560e5e00a962
[   28.358516] R13: 0000560e5e441810 R14: 0000560e5e009550 R15: 0000560e5e441970
[   28.358518]  </TASK>
[   28.358518] ---[ end trace 0000000000000000 ]---
[   28.358519] dsa: loading filter 12.6.0.5813
[   28.373362] dsa: registered on device 10:119
[   28.373698] dsa: registered on ssl device 10:118
[   28.377469] dsa: filter loaded OK

• In another system with tracedev 3rd party module.

Jan  5 14:14:12 kernel: ------------[ cut here ]------------
Jan  5 14:14:12 kernel: Unpatched return thunk in use. This should not happen!
Jan  5 14:14:12 kernel: WARNING: CPU: 3 PID: 509781 at arch/x86/kernel/cpu/bugs.c:3586 __warn_thunk+0x26/0x30
Jan  5 14:14:12 kernel: Modules linked in: tracedev(OE+) tls cls_bpf sch_ingress rfkill vsock_loopback vmw_vsock_virtio_transport_common vmw_vsock_vmci_transport vsock binfmt_misc vfat fat intel_rapl_msr intel_rapl_common intel_uncore_frequency_common isst_if_mbox_msr isst_if_common nfit libnvdimm rapl pcspkr i2c_piix4 joydev auth_rpcgss sunrpc xfs libcrc32c vmwgfx drm_ttm_helper ttm ahci ata_generic drm_kms_helper libahci ata_piix drm crct10dif_pclmul nvme crc32_pclmul libata vmw_balloon crc32c_intel nvme_core ghash_clmulni_intel vmxnet3 vmw_vmci nvme_auth serio_raw dm_mirror dm_region_hash dm_log dm_mod fuse [last unloaded: tracedev(OE)]
Jan  5 14:14:12 kernel: CPU: 3 PID: 509781 Comm: insmod Kdump: loaded Tainted: G           OE     -------  ---  5.14.0-570.69.1.el9_6.x86_64 #1
Jan  5 14:14:12 kernel: Hardware name: VMware, Inc. VMware20,1/440BX Desktop Reference Platform, BIOS VMW201.00V.24504846.B64.2501180339 01/18/2025
Jan  5 14:14:12 kernel: RIP: 0010:__warn_thunk+0x26/0x30
Jan  5 14:14:12 kernel: Code: 90 90 90 90 0f 1f 44 00 00 80 3d 8f ba 2f 02 00 74 05 e9 0d 0a cf 00 48 c7 c7 00 af 05 9c c6 05 7a ba 2f 02 01 e8 5a 3e 0c 00 <0f> 0b c3 cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90
Jan  5 14:14:12 kernel: RSP: 0018:ffffd1e0534a3a60 EFLAGS: 00010282
Jan  5 14:14:12 kernel: RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
Jan  5 14:14:12 kernel: RDX: ffff8d946baed980 RSI: ffff8d946bae08c0 RDI: ffff8d946bae08c0
Jan  5 14:14:12 kernel: RBP: ffffd1e0534a3ab0 R08: 0000000000000000 R09: ffffd1e0534a3908
Jan  5 14:14:12 kernel: R10: ffffd1e0534a3900 R11: ffffffff9cbe1848 R12: ffff8d922d237240
Jan  5 14:14:12 kernel: R13: 000055bef24e1962 R14: ffff8d9042355638 R15: ffffffff9d8729d0
Jan  5 14:14:12 kernel: FS:  00007f0fbdbda740(0000) GS:ffff8d946bac0000(0000) knlGS:0000000000000000
Jan  5 14:14:12 kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Jan  5 14:14:12 kernel: CR2: 000055bef2541328 CR3: 0000000105bd0003 CR4: 00000000007706f0
Jan  5 14:14:12 kernel: PKRU: 55555554
Jan  5 14:14:12 kernel: Call Trace:
Jan  5 14:14:12 kernel: <TASK>
Jan  5 14:14:12 kernel: warn_thunk_thunk+0x16/0x30
Jan  5 14:14:12 kernel: myModuleInit+0xe/0xff0 [tracedev]
Jan  5 14:14:12 kernel: ? chan+0x51e8/0x51e8 [tracedev]
Jan  5 14:14:12 kernel: do_one_initcall+0x41/0x210
Jan  5 14:14:12 kernel: do_init_module+0x64/0x230
Jan  5 14:14:12 kernel: init_module_from_file+0x8b/0xd0
Jan  5 14:14:12 kernel: idempotent_init_module+0x17e/0x230
Jan  5 14:14:12 kernel: __x64_sys_finit_module+0x5a/0xb0
Jan  5 14:14:12 kernel: do_syscall_64+0x5f/0xe0