linux-kernel - wireless-next tree: ODEBUG: free active, object type timer

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Message-ID: <d94cd6aa-ab04-8d34-e1e7-9c7aae7f81e7@candelatech.com>
Date:   Tue, 31 Oct 2023 15:18:09 -0700
From:   Ben Greear <greearb@...delatech.com>
To:     LKML <linux-kernel@...r.kernel.org>
Subject: wireless-next tree: ODEBUG: free active, object type timer_list

Hello,

In an attempt to debug various crashes I've been seeing while testing on wireless-next (based on 6.6.0-rc5, plus hacks),
I enabled all of the useful looking debug options that I could find.

While looking through logs, I see this below.  Any idea on how to debug this further?  It looks
like just generic code to me...

16876 Oct 31 15:05:08 ct523c-2103 kernel: ODEBUG: free active (active state 0) object: ffff888158c465a0 object type: timer_list hint: 
kobject_delayed_cleanup+0x0/0x140
16877 Oct 31 15:05:08 ct523c-2103 kernel: WARNING: CPU: 5 PID: 80 at lib/debugobjects.c:514 debug_print_object+0xdf/0x110
16878 Oct 31 15:05:08 ct523c-2103 kernel: Modules linked in: vrf nf_conntrack_netlink nfnetlink iptable_nat(-) nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 
bpfilter 8021q garp mrp stp llc              macvlan pktgen rpcrdma rdma_cm iw_cm ib_cm ib_core qrtr f71882fg snd_hda_codec_hdmi snd_hda_codec_realtek 
intel_rapl_msr snd_hda_codec_generic ledtrig_audio iTCO_wdt intel_pmc_bxt ee1004              iTCO_vendor_support coretemp intel_rapl_common snd_hda_intel 
snd_intel_dspcfg snd_hda_codec intel_tcc_cooling x86_pkg_temp_thermal intel_powerclamp snd_hda_core snd_hwdep snd_seq snd_seq_device       kvm_intel snd_pcm kvm 
intel_wmi_thunderbolt irqbypass snd_timer snd pcspkr i2c_i801 soundcore iwlmvm i2c_smbus mac80211 iwlwifi cfg80211 bfq mei_hdcp mei_pxp intel_pch_thermal 
tpm_crb tpm_tis         tpm_tis_core tpm acpi_pad sch_fq_codel nfsd auth_rpcgss nfs_acl lockd grace fuse sunrpc zram raid1 dm_raid raid456 libcrc32c 
async_raid6_recov async_memcpy async_pq async_xor xor async_tx             raid6_pq i915 drm_buddy intel_gtt drm_display_helper drm_kms_helper cec rc_core ttm 
igb i2c_algo_bit drm
16879 Oct 31 15:05:08 ct523c-2103 kernel:  agpgart mei_wdt xhci_pci ixgbe mdio xhci_pci_renesas dca i2c_core hwmon video wmi [last unloaded: iptable_nat]
16880 Oct 31 15:05:08 ct523c-2103 kernel: CPU: 5 PID: 80 Comm: kworker/5:1 Tainted: G        W          6.6.0-rc5+ #8
16881 Oct 31 15:05:08 ct523c-2103 kernel: Hardware name: Default string Default string/SKYBAY, BIOS 5.12 02/21/2023
16882 Oct 31 15:05:08 ct523c-2103 kernel: Workqueue: events kobject_delayed_cleanup
16883 Oct 31 15:05:08 ct523c-2103 kernel: RIP: 0010:debug_print_object+0xdf/0x110
16884 Oct 31 15:05:08 ct523c-2103 kernel: Code: a0 ab c4 82 e8 b2 6d b7 ff 4d 89 f9 4d 89 f0 89 e9 41 55 48 8b 14 dd a0 ab c4 82 4c 89 e6 48 c7 c7 00 9f c4 82 
e8 21 0b 75 ff <0f> 0b 58 5b 83 05 82 8d       49 02 01 5d 41 5c 41 5d 41 5e 41 5f c3 c3
16885 Oct 31 15:05:08 ct523c-2103 kernel: RSP: 0000:ffff8881131f7bf0 EFLAGS: 00010286
16886 Oct 31 15:05:08 ct523c-2103 kernel: RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffffff81343598
16887 Oct 31 15:05:08 ct523c-2103 kernel: RDX: 1ffff110838158a4 RSI: 0000000000000008 RDI: ffff88841c0ac520
16888 Oct 31 15:05:08 ct523c-2103 kernel: RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed102263ef43
16889 Oct 31 15:05:08 ct523c-2103 kernel: R10: ffff8881131f7a1f R11: 00000000000fa8d0 R12: ffffffff82c4a560
16890 Oct 31 15:05:08 ct523c-2103 kernel: R13: ffffffff82696e20 R14: ffff888158c465a0 R15: ffffffff82ac32a0
16891 Oct 31 15:05:08 ct523c-2103 kernel: FS:  0000000000000000(0000) GS:ffff88841c080000(0000) knlGS:0000000000000000
16892 Oct 31 15:05:08 ct523c-2103 kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
16893 Oct 31 15:05:08 ct523c-2103 kernel: CR2: 00007fe266cb2000 CR3: 0000000003696004 CR4: 00000000003706e0
16894 Oct 31 15:05:08 ct523c-2103 kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
16895 Oct 31 15:05:08 ct523c-2103 kernel: DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
16896 Oct 31 15:05:08 ct523c-2103 kernel: Call Trace:
16897 Oct 31 15:05:08 ct523c-2103 kernel:  <TASK>
16898 Oct 31 15:05:08 ct523c-2103 kernel:  ? __warn+0x9c/0x1f0
16899 Oct 31 15:05:08 ct523c-2103 kernel:  ? debug_print_object+0xdf/0x110
16900 Oct 31 15:05:08 ct523c-2103 kernel:  ? report_bug+0x1aa/0x1e0
16901 Oct 31 15:05:08 ct523c-2103 kernel:  ? handle_bug+0x41/0x80
16902 Oct 31 15:05:08 ct523c-2103 kernel:  ? exc_invalid_op+0x13/0x40
16903 Oct 31 15:05:08 ct523c-2103 kernel:  ? asm_exc_invalid_op+0x16/0x20
16904 Oct 31 15:05:08 ct523c-2103 kernel:  ? __kobject_del+0xc0/0xc0
16905 Oct 31 15:05:08 ct523c-2103 kernel:  ? tick_nohz_tick_stopped+0x18/0x30
16906 Oct 31 15:05:08 ct523c-2103 kernel:  ? debug_print_object+0xdf/0x110
16907 Oct 31 15:05:08 ct523c-2103 kernel:  ? __kobject_del+0xc0/0xc0
16908 Oct 31 15:05:08 ct523c-2103 kernel:  debug_check_no_obj_freed+0x261/0x2b0
16909 Oct 31 15:05:08 ct523c-2103 kernel:  __kmem_cache_free+0x185/0x200
16910 Oct 31 15:05:08 ct523c-2103 kernel:  ? device_release+0x57/0x100
16911 Oct 31 15:05:08 ct523c-2103 kernel:  device_release+0x57/0x100
16912 Oct 31 15:05:08 ct523c-2103 kernel:  kobject_delayed_cleanup+0xdf/0x140
16913 Oct 31 15:05:08 ct523c-2103 kernel:  process_one_work+0x475/0x920
16914 Oct 31 15:05:08 ct523c-2103 kernel:  ? kick_pool+0x1b0/0x1b0
16915 Oct 31 15:05:08 ct523c-2103 kernel:  ? __list_add_valid_or_report+0x33/0xd0
16916 Oct 31 15:05:08 ct523c-2103 kernel:  worker_thread+0x38a/0x680
16917 Oct 31 15:05:08 ct523c-2103 kernel:  ? __kthread_parkme+0xc9/0xe0
16918 Oct 31 15:05:08 ct523c-2103 kernel:  ? create_worker+0x380/0x380
16919 Oct 31 15:05:08 ct523c-2103 kernel:  kthread+0x199/0x1e0
16920 Oct 31 15:05:08 ct523c-2103 kernel:  ? kthread+0xed/0x1e0
16921 Oct 31 15:05:08 ct523c-2103 kernel:  ? kthread_complete_and_exit+0x20/0x20
16922 Oct 31 15:05:08 ct523c-2103 kernel:  ret_from_fork+0x28/0x50
16923 Oct 31 15:05:08 ct523c-2103 kernel:  ? kthread_complete_and_exit+0x20/0x20
16924 Oct 31 15:05:08 ct523c-2103 kernel:  ret_from_fork_asm+0x11/0x20
16925 Oct 31 15:05:08 ct523c-2103 kernel:  </TASK>
16926 Oct 31 15:05:08 ct523c-2103 kernel: irq event stamp: 33601
16927 Oct 31 15:05:08 ct523c-2103 kernel: hardirqs last  enabled at (33607): [<ffffffff812c876d>] console_unlock+0x15d/0x170
16928 Oct 31 15:05:08 ct523c-2103 kernel: hardirqs last disabled at (33612): [<ffffffff812c8752>] console_unlock+0x142/0x170
16929 Oct 31 15:05:08 ct523c-2103 kernel: softirqs last  enabled at (33112): [<ffffffff811ea631>] __irq_exit_rcu+0x81/0xa0
16930 Oct 31 15:05:08 ct523c-2103 kernel: softirqs last disabled at (33107): [<ffffffff811ea631>] __irq_exit_rcu+0x81/0xa0
16931 Oct 31 15:05:08 ct523c-2103 kernel: ---[ end trace 0000000000000000 ]---
16932 Oct 31 15:05:08 ct523c-2103 kernel: kobject: 'pps2': free name

Thanks,
Ben
-- 
Ben Greear <greearb@...delatech.com>
Candela Technologies Inc  http://www.candelatech.com