I saw this while testing a kernel a great pile of debugging options turned on.
This might be something I can actually debug, so I'll try to investigate it more.
Oct 31 15:19:38 ct523c-2103 kernel: BUG kmalloc-96 (Tainted: G W ): Freepointer corrupt
Oct 31 15:19:38 ct523c-2103 kernel: -----------------------------------------------------------------------------
Oct 31 15:19:38 ct523c-2103 kernel: Allocated in iwl_dbg_tlv_add+0x27/0xc0 [iwlwifi] age=18446726515884352973 cpu=4088 pid=990
Oct 31 15:19:38 ct523c-2103 kernel: adjust-he-cap, disabling 160Mhz.
Oct 31 15:19:38 ct523c-2103 kernel: __kmalloc+0x4b/0x150
Oct 31 15:19:38 ct523c-2103 kernel: iwl_dbg_tlv_add+0x27/0xc0 [iwlwifi]
Oct 31 15:19:38 ct523c-2103 kernel: _iwl_dbg_tlv_time_point+0x14c2/0x1660 [iwlwifi]
Oct 31 15:19:38 ct523c-2103 kernel: iwl_run_unified_mvm_ucode+0x171/0x4c0 [iwlmvm]
Oct 31 15:19:38 ct523c-2103 kernel: iwl_run_init_mvm_ucode+0x3e7/0x620 [iwlmvm]
Oct 31 15:19:38 ct523c-2103 kernel: iwl_mvm_start_get_nvm+0xff/0x380 [iwlmvm]
Oct 31 15:19:38 ct523c-2103 kernel: iwl_op_mode_mvm_start+0x1119/0x1460 [iwlmvm]
Oct 31 15:19:38 ct523c-2103 kernel: _iwl_op_mode_start+0x197/0x1e0 [iwlwifi]
Oct 31 15:19:38 ct523c-2103 kernel: iwl_opmode_register+0x84/0x110 [iwlwifi]
Oct 31 15:19:38 ct523c-2103 kernel: 0xffffffffa1ac801d
Oct 31 15:19:38 ct523c-2103 kernel: do_one_initcall+0xb4/0x380
Oct 31 15:19:38 ct523c-2103 kernel: do_init_module+0x130/0x360
Oct 31 15:19:38 ct523c-2103 kernel: load_module+0x3263/0x3440
Oct 31 15:19:38 ct523c-2103 kernel: init_module_from_file+0xcc/0x120
Oct 31 15:19:38 ct523c-2103 kernel: idempotent_init_module+0x1ae/0x3e0
Oct 31 15:19:38 ct523c-2103 kernel: __x64_sys_finit_module+0x73/0xc0
Oct 31 15:19:38 ct523c-2103 kernel: Slab 0xffffea0004ade580 objects=37 used=18 fp=0xffff88812b796cb0
flags=0x5fff8000000840(slab|head|node=0|zone=2|lastcpupid=0x3fff)
Oct 31 15:19:38 ct523c-2103 kernel: Object 0xffff88812b796878 @offset=2168 fp=0x00000ff82b796950
Oct 31 15:19:38 ct523c-2103 kernel: Redzone ffff88812b796870: cc cc cc cc cc cc cc cc ........
Oct 31 15:19:38 ct523c-2103 kernel: Object ffff88812b796878: 40 8e 12 cb 81 88 ff ff f5 5a 00 00 ca 02 50 06 @........Z....P.
Oct 31 15:19:38 ct523c-2103 kernel: Object ffff88812b796888: 09 00 00 01 48 00 00 00 01 00 00 00 00 00 00 00 ....H...........
Oct 31 15:19:38 ct523c-2103 kernel: Object ffff88812b796898: 08 00 00 00 0a 1a 00 00 03 00 01 00 00 00 00 00 ................
Oct 31 15:19:38 ct523c-2103 kernel: Object ffff88812b7968a8: ff ff ff ff 00 00 00 00 00 00 00 00 00 00 00 00 ................
Oct 31 15:19:38 ct523c-2103 kernel: Object ffff88812b7968b8: 00 00 00 00 01 00 01 04 01 00 00 f0 f8 0f 00 00 ................
Oct 31 15:19:38 ct523c-2103 kernel: Object ffff88812b7968c8: cc cc cc cc cc cc cc cc cc cc cc cc f8 0f 00 00 ................
Oct 31 15:19:38 ct523c-2103 kernel: Redzone ffff88812b7968d8: cc cc cc cc cc cc cc cc ........
Oct 31 15:19:38 ct523c-2103 kernel: Padding ffff88812b79693c: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZZZZZ
Oct 31 15:19:38 ct523c-2103 kernel: CPU: 0 PID: 23351 Comm: pkill Tainted: G W 6.6.0-rc5+ #8
Oct 31 15:19:38 ct523c-2103 kernel: Hardware name: Default string Default string/SKYBAY, BIOS 5.12 02/21/2023
Oct 31 15:19:38 ct523c-2103 kernel: Call Trace:
Oct 31 15:19:38 ct523c-2103 kernel: <TASK>
Oct 31 15:19:38 ct523c-2103 kernel: dump_stack_lvl+0x57/0x90
Oct 31 15:19:38 ct523c-2103 kernel: check_object+0x14e/0x310
Oct 31 15:19:38 ct523c-2103 kernel: free_to_partial_list+0x1ff/0x5b0
Oct 31 15:19:38 ct523c-2103 kernel: ? qlist_free_all+0x68/0x190
Oct 31 15:19:38 ct523c-2103 kernel: qlist_free_all+0x6d/0x190
Oct 31 15:19:38 ct523c-2103 kernel: ? _raw_spin_unlock_irqrestore+0x2b/0x50
Oct 31 15:19:38 ct523c-2103 kernel: kasan_quarantine_reduce+0x18a/0x1d0
Oct 31 15:19:38 ct523c-2103 kernel: __kasan_slab_alloc+0x46/0x70
Oct 31 15:19:38 ct523c-2103 kernel: kmem_cache_alloc+0x111/0x310
Oct 31 15:19:38 ct523c-2103 kernel: ? mntput_no_expire+0xf0/0x5d0
Oct 31 15:19:38 ct523c-2103 kernel: ? getname_flags.part.0+0x34/0x240
Oct 31 15:19:38 ct523c-2103 kernel: ? mark_held_locks+0x24/0x90
Oct 31 15:19:38 ct523c-2103 kernel: getname_flags.part.0+0x34/0x240
Oct 31 15:19:38 ct523c-2103 kernel: ? build_open_flags+0x1d9/0x240
Oct 31 15:19:38 ct523c-2103 kernel: do_sys_openat2+0xc6/0x130
Oct 31 15:19:38 ct523c-2103 kernel: ? build_open_flags+0x240/0x240
Oct 31 15:19:38 ct523c-2103 kernel: ? debug_objects_oom+0x220/0x220
Oct 31 15:19:38 ct523c-2103 kernel: ? lockdep_hardirqs_on_prepare+0x132/0x200
Oct 31 15:19:38 ct523c-2103 kernel: ? percpu_counter_add_batch+0xd0/0x120
Oct 31 15:19:38 ct523c-2103 kernel: __x64_sys_openat+0xe0/0x130
Oct 31 15:19:38 ct523c-2103 kernel: ? __x64_compat_sys_openat+0x130/0x130
Oct 31 15:19:38 ct523c-2103 kernel: ? __call_rcu_common.constprop.0+0x220/0x480
Oct 31 15:19:38 ct523c-2103 kernel: ? lockdep_hardirqs_on_prepare+0x132/0x200
Oct 31 15:19:38 ct523c-2103 kernel: ? syscall_enter_from_user_mode+0x1c/0x50
Oct 31 15:19:38 ct523c-2103 kernel: do_syscall_64+0x34/0xb0
Oct 31 15:19:38 ct523c-2103 kernel: entry_SYSCALL_64_after_hwframe+0x46/0xb0
Oct 31 15:19:38 ct523c-2103 kernel: RIP: 0033:0x7fbc6c9018e8
Oct 31 15:19:38 ct523c-2103 kernel: Code: f0 25 00 00 41 00 3d 00 00 41 00 74 45 64 8b 04 25 18 00 00 00 85 c0 75 69 89 da 48 89 ee bf 9c ff ff ff b8 01 01 00
00 0f 05 <48> 3d 00 f0 ff ff 0f 87 8c 00 00 00 48 8b 54 24 28 64 48 2b 14 25
Oct 31 15:19:38 ct523c-2103 kernel: RSP: 002b:00007ffcd6384370 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
Oct 31 15:19:38 ct523c-2103 kernel: RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fbc6c9018e8
Oct 31 15:19:38 ct523c-2103 kernel: RDX: 0000000000000000 RSI: 00007ffcd6384400 RDI: 00000000ffffff9c
Oct 31 15:19:38 ct523c-2103 kernel: RBP: 00007ffcd6384400 R08: 0000000000000000 R09: 0000000000000073
Oct 31 15:19:38 ct523c-2103 kernel: R10: 0000000000000000 R11: 0000000000000246 R12: 0000562d00eb8ac0
Oct 31 15:19:38 ct523c-2103 kernel: R13: 0000000000000000 R14: 0000000000000020 R15: 000000000001ffc5
Oct 31 15:19:38 ct523c-2103 kernel: </TASK>
Oct 31 15:19:38 ct523c-2103 kernel: FIX kmalloc-96: Object at 0xffff88812b796878 not freed
--
Ben Greear <greearb@xxxxxxxxxxxxxxx>
Candela Technologies Inc http://www.candelatech.com
