Subject: [REGRESSION] Re: [PATCH v2 22/50] convert efivarfs

From: Chris Bainbridge <[email-masked]>
Date: Wed, 19 Nov 2025 21:15:54 +0000

On Wed, Nov 05, 2025 at 02:43:34PM +0100, Christian Brauner wrote:
> > > > And suspend/resume works just fine with freeze/thaw. See commit
> > > > eacfbf74196f ("power: freeze filesystems during suspend/resume")
> > > > which implements exactly that.
> > > > 
> > > > The reason this didn't work for you is very likely:
> > > > 
> > > > cat /sys/power/freeze_filesystems
> > > > 0
> > > > 
> > > > which you must set to 1.
> > > 
> > > Actually, no, that's not correct.  The efivarfs freeze/thaw logic must
> > > run unconditionally regardless of this setting to fix the systemd bug,
> > > so all the variable resyncing is done in the thaw call, which isn't
> > > conditioned on the above (or at least it shouldn't be).
> > 
> > It is conditioned on the above currently but we can certainly fix it
> > easily to not be.
> 
> Something like the appended patch would do it.

> >From 1f9dc293cebb10b18d9ec8e01b60c014664c98ab Mon Sep 17 00:00:00 2001
> From: Christian Brauner <[email-masked]>
> Date: Wed, 5 Nov 2025 14:39:45 +0100
> Subject: [PATCH] power: always freeze efivarfs
> 
> The efivarfs filesystems must always be frozen and thawed to resync
> variable state. Make it so.
> 
> Signed-off-by: Christian Brauner <[email-masked]>

I bisected some intermittent (44% chance of occuring on any given
suspend) lock warnings on suspend to this commit:

a3f8f8662771285511ae26c4c8d3ba1cd22159b9 power: always freeze efivarfs

Reproducer: `for x in {1..20}; do systemctl suspend; sleep 5; done`

Warnings are:

[   50.702541] OOM killer enabled.
[   50.702545] Restarting tasks: Starting
[   50.703553] Restarting tasks: Done
[   50.704233] efivarfs: resyncing variable state
[   50.710323] efivarfs: finished resyncing variable state
[   50.710349] random: crng reseeded on system resumption
[   50.724547] PM: suspend exit
[   50.743157] nvme nvme0: 8/0/0 default/read/poll queues
[   54.814961] PM: suspend entry (s2idle)
[   55.064704] Filesystems sync: 0.249 seconds
[   55.112462] Freezing user space processes
[   55.112647] ------------[ cut here ]------------

[   55.113009] ======================================================
[   55.113010] WARNING: possible circular locking dependency detected
[   55.113011] 6.18.0-rc6-00040-g8b690556d8fe-dirty #168 Not tainted
[   55.113012] ------------------------------------------------------
[   55.113012] systemd-sleep/2563 is trying to acquire lock:
[   55.113013] ffffffff99e7aa00 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x3c/0x60
[   55.113021] 
               but task is already holding lock:
[   55.113022] ffff9c3961c65728 (&p->pi_lock){-.-.}-{2:2}, at: task_call_func+0x49/0xf0
[   55.113025] 
               which lock already depends on the new lock.

[   55.113025] 
               the existing dependency chain (in reverse order) is:
[   55.113025] 
               -> #2 (&p->pi_lock){-.-.}-{2:2}:
[   55.113027]        _raw_spin_lock_irqsave+0x47/0x60
[   55.113030]        try_to_wake_up+0x69/0xac0
[   55.113031]        create_worker+0x17c/0x200
[   55.113033]        workqueue_init+0x27e/0x2e0
[   55.113036]        kernel_init_freeable+0x15e/0x310
[   55.113038]        kernel_init+0x16/0x120
[   55.113039]        ret_from_fork+0x2a9/0x310
[   55.113041]        ret_from_fork_asm+0x11/0x20
[   55.113043] 
               -> #1 (&pool->lock){-.-.}-{2:2}:
[   55.113045]        _raw_spin_lock+0x2f/0x40
[   55.113046]        __queue_work+0x23d/0x680
[   55.113048]        queue_work_on+0x56/0xa0
[   55.113050]        soft_cursor+0x196/0x240
[   55.113053]        bit_cursor+0x368/0x5e0
[   55.113055]        hide_cursor+0x21/0xa0
[   55.113056]        vt_console_print+0x460/0x480
[   55.113057]        console_flush_all+0x2de/0x4e0
[   55.113059]        console_unlock+0x78/0x130
[   55.113060]        vprintk_emit+0x34c/0x400
[   55.113062]        _printk+0x67/0x80
[   55.113064]        int_to_scsilun+0xa/0x30 [scsi_common]
[   55.113068]        do_one_initcall+0x68/0x390
[   55.113069]        do_init_module+0x60/0x220
[   55.113070]        init_module_from_file+0x85/0xc0
[   55.113071]        idempotent_init_module+0x11a/0x310
[   55.113072]        __x64_sys_finit_module+0x69/0xd0
[   55.113073]        do_syscall_64+0x95/0x6e0
[   55.113076]        entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   55.113077] 
               -> #0 (console_owner){....}-{0:0}:
[   55.113078]        __lock_acquire+0x1444/0x2200
[   55.113080]        lock_acquire+0xd1/0x2e0
[   55.113081]        console_lock_spinning_enable+0x58/0x60
[   55.113083]        console_flush_all+0x2a6/0x4e0
[   55.113085]        console_unlock+0x78/0x130
[   55.113086]        vprintk_emit+0x34c/0x400
[   55.113088]        _printk+0x67/0x80
[   55.113090]        report_bug.cold+0x13/0x5a
[   55.113092]        handle_bug+0x18d/0x250
[   55.113094]        exc_invalid_op+0x13/0x60
[   55.113096]        asm_exc_invalid_op+0x16/0x20
[   55.113097]        __set_task_frozen+0x6a/0x90
[   55.113099]        task_call_func+0x76/0xf0
[   55.113099]        freeze_task+0x87/0xf0
[   55.113101]        try_to_freeze_tasks+0xe1/0x2b0
[   55.113102]        freeze_processes+0x46/0xb0
[   55.113104]        pm_suspend.cold+0x194/0x29f
[   55.113106]        state_store+0x68/0xc0
[   55.113108]        kernfs_fop_write_iter+0x172/0x240
[   55.113110]        vfs_write+0x249/0x560
[   55.113112]        ksys_write+0x6d/0xe0
[   55.113114]        do_syscall_64+0x95/0x6e0
[   55.113115]        entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   55.113116] 
               other info that might help us debug this:

[   55.113117] Chain exists of:
                 console_owner --> &pool->lock --> &p->pi_lock

[   55.113118]  Possible unsafe locking scenario:

[   55.113119]        CPU0                    CPU1
[   55.113119]        ----                    ----
[   55.113119]   lock(&p->pi_lock);
[   55.113120]                                lock(&pool->lock);
[   55.113121]                                lock(&p->pi_lock);
[   55.113121]   lock(console_owner);
[   55.113122] 
                *** DEADLOCK ***

[   55.113122] 9 locks held by systemd-sleep/2563:
[   55.113124]  #0: ffff9c39429a2420 (sb_writers#5){.+.+}-{0:0}, at: ksys_write+0x6d/0xe0
[   55.113127]  #1: ffff9c394683f488 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x117/0x240
[   55.113130]  #2: ffff9c3941257298 (kn->active#212){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x12c/0x240
[   55.113132]  #3: ffffffff99e6f088 (system_transition_mutex){+.+.}-{4:4}, at: pm_suspend.cold+0x4c/0x29f
[   55.113136]  #4: ffffffff99e08098 (tasklist_lock){.+.+}-{3:3}, at: try_to_freeze_tasks+0x8a/0x2b0
[   55.113138]  #5: ffffffff99fa8e98 (freezer_lock){....}-{3:3}, at: freeze_task+0x29/0xf0
[   55.113141]  #6: ffff9c3961c65728 (&p->pi_lock){-.-.}-{2:2}, at: task_call_func+0x49/0xf0
[   55.113143]  #7: ffffffff99eeadc0 (console_lock){+.+.}-{0:0}, at: _printk+0x67/0x80
[   55.113146]  #8: ffffffff99eeae10 (console_srcu){....}-{0:0}, at: console_flush_all+0x3d/0x4e0
[   55.113149] 
               stack backtrace:
[   55.113151] CPU: 8 UID: 0 PID: 2563 Comm: systemd-sleep Not tainted 6.18.0-rc6-00040-g8b690556d8fe-dirty #168 PREEMPT(voluntary) 
[   55.113153] Hardware name: HP HP Pavilion Aero Laptop 13-be0xxx/8916, BIOS F.17 12/18/2024
[   55.113154] Call Trace:
[   55.113155]  <TASK>
[   55.113156]  dump_stack_lvl+0x6a/0x90
[   55.113159]  print_circular_bug.cold+0x178/0x1be
[   55.113162]  check_noncircular+0x142/0x160
[   55.113166]  __lock_acquire+0x1444/0x2200
[   55.113169]  lock_acquire+0xd1/0x2e0
[   55.113170]  ? console_lock_spinning_enable+0x3c/0x60
[   55.113173]  ? console_lock_spinning_enable+0x35/0x60
[   55.113175]  ? lock_release+0x17d/0x2c0
[   55.113177]  console_lock_spinning_enable+0x58/0x60
[   55.113179]  ? console_lock_spinning_enable+0x3c/0x60
[   55.113181]  console_flush_all+0x2a6/0x4e0
[   55.113183]  ? console_flush_all+0x3d/0x4e0
[   55.113186]  console_unlock+0x78/0x130
[   55.113188]  vprintk_emit+0x34c/0x400
[   55.113191]  ? __set_task_frozen+0x6a/0x90
[   55.113193]  _printk+0x67/0x80
[   55.113195]  ? lock_is_held_type+0xd5/0x130
[   55.113199]  report_bug.cold+0x13/0x5a
[   55.113201]  ? __set_task_frozen+0x6a/0x90
[   55.113203]  handle_bug+0x18d/0x250
[   55.113205]  exc_invalid_op+0x13/0x60
[   55.113207]  asm_exc_invalid_op+0x16/0x20
[   55.113209] RIP: 0010:__set_task_frozen+0x6a/0x90
[   55.113211] Code: f7 c5 00 20 00 00 74 06 40 f6 c5 03 74 33 81 e5 00 40 00 00 75 16 8b 15 d8 8c 52 01 85 d2 74 0c 8b 83 f0 0e 00 00 85 c0 74 02 <0f> 0b 8b 43 18 c7 43 18 00 80 00 00 89 43 1c b8 00 80 00 00 5b 5d
[   55.113212] RSP: 0018:ffffbfba462ef8d0 EFLAGS: 00010002
[   55.113214] RAX: 0000000000000002 RBX: ffff9c3961c64900 RCX: 0000000000000000
[   55.113215] RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff9c3961c64900
[   55.113216] RBP: 0000000000000000 R08: 00000000000000b6 R09: 0000000000000006
[   55.113217] R10: 00000000000000f0 R11: 0000000000000006 R12: ffffffff98bd9000
[   55.113217] R13: 0000000000000000 R14: ffff9c3961c65710 R15: ffff9c3961c65200
[   55.113218]  ? freezing_slow_path+0x70/0x70
[   55.113222]  task_call_func+0x76/0xf0
[   55.113224]  freeze_task+0x87/0xf0
[   55.113226]  try_to_freeze_tasks+0xe1/0x2b0
[   55.113229]  ? lockdep_hardirqs_on+0x78/0x100
[   55.113231]  freeze_processes+0x46/0xb0
[   55.113233]  pm_suspend.cold+0x194/0x29f
[   55.113235]  state_store+0x68/0xc0
[   55.113238]  kernfs_fop_write_iter+0x172/0x240
[   55.113239]  vfs_write+0x249/0x560
[   55.113243]  ksys_write+0x6d/0xe0
[   55.113246]  do_syscall_64+0x95/0x6e0
[   55.113249]  ? __lock_acquire+0x469/0x2200
[   55.113252]  ? __lock_acquire+0x469/0x2200
[   55.113255]  ? lock_acquire+0xd1/0x2e0
[   55.113257]  ? find_held_lock+0x2b/0x80
[   55.113258]  ? __folio_batch_add_and_move+0x185/0x320
[   55.113260]  ? find_held_lock+0x2b/0x80
[   55.113261]  ? rcu_read_unlock+0x17/0x60
[   55.113264]  ? rcu_read_unlock+0x17/0x60
[   55.113266]  ? lock_release+0x17d/0x2c0
[   55.113269]  ? __lock_acquire+0x469/0x2200
[   55.113271]  ? __handle_mm_fault+0xac2/0xf10
[   55.113273]  ? find_held_lock+0x2b/0x80
[   55.113275]  ? rcu_read_unlock+0x17/0x60
[   55.113276]  ? rcu_read_unlock+0x17/0x60
[   55.113278]  ? lock_release+0x17d/0x2c0
[   55.113279]  ? rcu_is_watching+0xd/0x40
[   55.113281]  ? find_held_lock+0x2b/0x80
[   55.113282]  ? exc_page_fault+0x8f/0x260
[   55.113284]  ? exc_page_fault+0x8f/0x260
[   55.113285]  ? lock_release+0x17d/0x2c0
[   55.113287]  ? exc_page_fault+0x132/0x260
[   55.113289]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   55.113291] RIP: 0033:0x7fd302d0e0d0
[   55.113292] Code: 2d 0e 00 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 80 3d 99 af 0e 00 00 74 17 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 58 c3 0f 1f 80 00 00 00 00 48 83 ec 28 48 89
[   55.113293] RSP: 002b:00007fffb5edd3d8 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[   55.113295] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fd302d0e0d0
[   55.113295] RDX: 0000000000000004 RSI: 000055aa9fd98750 RDI: 0000000000000007
[   55.113296] RBP: 000055aa9fd98750 R08: 00007fd302df1ac0 R09: 0000000000000001
[   55.113297] R10: 00007fd302df1bb0 R11: 0000000000000202 R12: 0000000000000004
[   55.113297] R13: 000055aa9fd8f2a0 R14: 00007fd302defea0 R15: 00000000fffffff7
[   55.113301]  </TASK>
[   55.113362] WARNING: CPU: 8 PID: 2563 at kernel/freezer.c:140 __set_task_frozen+0x6a/0x90
[   55.113366] Modules linked in: snd_seq_dummy snd_hrtimer snd_seq snd_seq_device xt_conntrack nft_chain_nat xt_MASQUERADE nf_nat nf_conntrack_netlink nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 xfrm_user xfrm_algo xt_addrtype nft_compat x_tables nf_tables br_netfilter bridge stp llc ccm overlay qrtr rfcomm cmac algif_hash algif_skcipher af_alg bnep binfmt_misc nls_ascii nls_cp437 vfat fat iwlmvm snd_hda_codec_generic intel_rapl_msr uvcvideo snd_hda_codec_hdmi amd_atl mac80211 btusb videobuf2_vmalloc intel_rapl_common btrtl videobuf2_memops snd_hda_intel snd_acp3x_pdm_dma snd_soc_dmic snd_acp3x_rn uvc btintel kvm_amd snd_hda_codec videobuf2_v4l2 snd_soc_core btbcm libarc4 videodev snd_compress btmtk snd_intel_dspcfg ucsi_acpi kvm snd_hwdep videobuf2_common snd_pci_acp6x typec_ucsi bluetooth snd_hda_core snd_pci_acp5x mc ee1004 sg iwlwifi irqbypass roles snd_pcm ecdh_generic snd_rn_pci_acp3x typec wmi_bmof ecc rapl snd_timer snd_acp_config cfg80211 snd snd_soc_acpi sp5100_tco pcspkr k10temp thunderbolt watchdog ccp
[   55.113424]  snd_pci_acp3x soundcore rfkill ac battery joydev acpi_tad amd_pmc evdev serio_raw msr dm_mod parport_pc ppdev lp parport nvme_fabrics fuse efi_pstore configfs nfnetlink efivarfs autofs4 crc32c_cryptoapi sd_mod uas usb_storage scsi_mod scsi_common btrfs blake2b_generic xor raid6_pq amdgpu drm_client_lib i2c_algo_bit drm_ttm_helper ttm drm_exec drm_suballoc_helper drm_buddy drm_panel_backlight_quirks gpu_sched amdxcp drm_display_helper xhci_pci hid_multitouch drm_kms_helper hid_generic xhci_hcd cec i2c_hid_acpi amd_sfh i2c_hid rc_core nvme usbcore i2c_piix4 video ghash_clmulni_intel hid crc16 usb_common nvme_core i2c_smbus fan button wmi drm aesni_intel
[   55.113467] CPU: 8 UID: 0 PID: 2563 Comm: systemd-sleep Not tainted 6.18.0-rc6-00040-g8b690556d8fe-dirty #168 PREEMPT(voluntary) 
[   55.113470] Hardware name: HP HP Pavilion Aero Laptop 13-be0xxx/8916, BIOS F.17 12/18/2024
[   55.113471] RIP: 0010:__set_task_frozen+0x6a/0x90
[   55.113473] Code: f7 c5 00 20 00 00 74 06 40 f6 c5 03 74 33 81 e5 00 40 00 00 75 16 8b 15 d8 8c 52 01 85 d2 74 0c 8b 83 f0 0e 00 00 85 c0 74 02 <0f> 0b 8b 43 18 c7 43 18 00 80 00 00 89 43 1c b8 00 80 00 00 5b 5d
[   55.113474] RSP: 0018:ffffbfba462ef8d0 EFLAGS: 00010002
[   55.113476] RAX: 0000000000000002 RBX: ffff9c3961c64900 RCX: 0000000000000000
[   55.113477] RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff9c3961c64900
[   55.113479] RBP: 0000000000000000 R08: 00000000000000b6 R09: 0000000000000006
[   55.113480] R10: 00000000000000f0 R11: 0000000000000006 R12: ffffffff98bd9000
[   55.113481] R13: 0000000000000000 R14: ffff9c3961c65710 R15: ffff9c3961c65200
[   55.113482] FS:  00007fd303258980(0000) GS:ffff9c3cb2d98000(0000) knlGS:0000000000000000
[   55.113484] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   55.113485] CR2: 0000561c6a183168 CR3: 0000000122bcb000 CR4: 0000000000750ef0
[   55.113487] PKRU: 55555554
[   55.113488] Call Trace:
[   55.113489]  <TASK>
[   55.113491]  task_call_func+0x76/0xf0
[   55.113493]  freeze_task+0x87/0xf0
[   55.113496]  try_to_freeze_tasks+0xe1/0x2b0
[   55.113499]  ? lockdep_hardirqs_on+0x78/0x100
[   55.113502]  freeze_processes+0x46/0xb0
[   55.113505]  pm_suspend.cold+0x194/0x29f
[   55.113507]  state_store+0x68/0xc0
[   55.113510]  kernfs_fop_write_iter+0x172/0x240
[   55.113513]  vfs_write+0x249/0x560
[   55.113518]  ksys_write+0x6d/0xe0
[   55.113521]  do_syscall_64+0x95/0x6e0
[   55.113524]  ? __lock_acquire+0x469/0x2200
[   55.113528]  ? __lock_acquire+0x469/0x2200
[   55.113532]  ? lock_acquire+0xd1/0x2e0
[   55.113534]  ? find_held_lock+0x2b/0x80
[   55.113536]  ? __folio_batch_add_and_move+0x185/0x320
[   55.113538]  ? find_held_lock+0x2b/0x80
[   55.113540]  ? rcu_read_unlock+0x17/0x60
[   55.113543]  ? rcu_read_unlock+0x17/0x60
[   55.113545]  ? lock_release+0x17d/0x2c0
[   55.113549]  ? __lock_acquire+0x469/0x2200
[   55.113551]  ? __handle_mm_fault+0xac2/0xf10
[   55.113554]  ? find_held_lock+0x2b/0x80
[   55.113556]  ? rcu_read_unlock+0x17/0x60
[   55.113558]  ? rcu_read_unlock+0x17/0x60
[   55.113561]  ? lock_release+0x17d/0x2c0
[   55.113563]  ? rcu_is_watching+0xd/0x40
[   55.113565]  ? find_held_lock+0x2b/0x80
[   55.113566]  ? exc_page_fault+0x8f/0x260
[   55.113568]  ? exc_page_fault+0x8f/0x260
[   55.113570]  ? lock_release+0x17d/0x2c0
[   55.113573]  ? exc_page_fault+0x132/0x260
[   55.113576]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   55.113578] RIP: 0033:0x7fd302d0e0d0
[   55.113579] Code: 2d 0e 00 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 80 3d 99 af 0e 00 00 74 17 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 58 c3 0f 1f 80 00 00 00 00 48 83 ec 28 48 89
[   55.113581] RSP: 002b:00007fffb5edd3d8 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[   55.113583] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fd302d0e0d0
[   55.113584] RDX: 0000000000000004 RSI: 000055aa9fd98750 RDI: 0000000000000007
[   55.113585] RBP: 000055aa9fd98750 R08: 00007fd302df1ac0 R09: 0000000000000001
[   55.113586] R10: 00007fd302df1bb0 R11: 0000000000000202 R12: 0000000000000004
[   55.113587] R13: 000055aa9fd8f2a0 R14: 00007fd302defea0 R15: 00000000fffffff7
[   55.113591]  </TASK>
[   55.113592] irq event stamp: 22480
[   55.113594] hardirqs last  enabled at (22479): [<ffffffff997159b8>] _raw_spin_unlock_irqrestore+0x48/0x60
[   55.113596] hardirqs last disabled at (22480): [<ffffffff9971575b>] _raw_spin_lock_irqsave+0x5b/0x60
[   55.113598] softirqs last  enabled at (21756): [<ffffffff98a91401>] kernel_fpu_end+0x31/0x40
[   55.113600] softirqs last disabled at (21754): [<ffffffff98a91a66>] kernel_fpu_begin_mask+0xd6/0x150
[   55.113602] ---[ end trace 0000000000000000 ]---
[   55.115030] Freezing user space processes completed (elapsed 0.002 seconds)
[   55.115035] OOM killer disabled.
[   55.115037] Freezing remaining freezable tasks
[   55.116230] Freezing remaining freezable tasks completed (elapsed 0.001 seconds)
[   55.116233] printk: Suspending console(s) (use no_console_suspend to debug)

And another:

[   90.334155] OOM killer enabled.
[   90.334159] Restarting tasks: Starting
[   90.335256] Restarting tasks: Done
[   90.336242] efivarfs: resyncing variable state
[   90.347855] efivarfs: finished resyncing variable state
[   90.351615] random: crng reseeded on system resumption
[   90.402289] Bluetooth: MGMT ver 1.23
[   90.418337] PM: suspend exit
[   90.418508] PM: suspend entry (s2idle)
[   90.442310] Filesystems sync: 0.023 seconds
[   90.464970] Freezing user space processes
[   90.465209] ------------[ cut here ]------------
[   90.465655] WARNING: CPU: 12 PID: 3770 at kernel/freezer.c:140 __set_task_frozen+0x6a/0x90
[   90.465662] Modules linked in: snd_seq_dummy snd_hrtimer snd_seq snd_seq_device xt_conntrack nft_chain_nat xt_MASQUERADE nf_nat nf_conntrack_netlink nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 xfrm_user xfrm_algo xt_addrtype nft_compat x_tables nf_tables br_netfilter bridge stp llc ccm overlay qrtr rfcomm cmac algif_hash algif_skcipher af_alg bnep binfmt_misc ext4 mbcache jbd2 nls_ascii nls_cp437 vfat fat iwlmvm intel_rapl_msr amd_atl intel_rapl_common snd_hda_codec_generic snd_hda_codec_hdmi btusb uvcvideo mac80211 btrtl videobuf2_vmalloc btintel kvm_amd videobuf2_memops snd_hda_intel btbcm uvc libarc4 snd_hda_codec btmtk videobuf2_v4l2 kvm snd_intel_dspcfg snd_hda_scodec_cs35l41_i2c snd_hwdep bluetooth videodev snd_hda_scodec_cs35l41 snd_hda_core irqbypass iwlwifi ideapad_laptop snd_soc_cs_amp_lib videobuf2_common ecdh_generic sparse_keymap snd_pcm cs_dsp rapl ecc mc wmi_bmof ee1004 platform_profile pcspkr cfg80211 snd_soc_cs35l41_lib snd_timer k10temp ccp sg rfkill battery snd soundcore cm32181
[   90.466192]  serial_multi_instantiate industrialio joydev ac evdev msr parport_pc ppdev lp parport nvme_fabrics fuse efi_pstore configfs nfnetlink efivarfs autofs4 crc32c_cryptoapi btrfs blake2b_generic xor raid6_pq dm_crypt sd_mod uas usbhid usb_storage amdgpu drm_client_lib i2c_algo_bit drm_ttm_helper ttm drm_exec drm_suballoc_helper drm_buddy drm_panel_backlight_quirks dm_mod gpu_sched ahci amdxcp r8169 libahci drm_display_helper ucsi_acpi realtek libata drm_kms_helper typec_ucsi hid_multitouch xhci_pci mdio_devres roles cec sp5100_tco hid_generic xhci_hcd libphy scsi_mod nvme video typec rc_core wdat_wdt i2c_piix4 ghash_clmulni_intel nvme_core mdio_bus serio_raw watchdog scsi_common usbcore thunderbolt crc16 i2c_hid_acpi i2c_smbus usb_common i2c_hid wmi hid drm button aesni_intel
[   90.466268] CPU: 12 UID: 0 PID: 3770 Comm: systemd-sleep Not tainted 6.18.0-rc6-00040-g8b690556d8fe-dirty #168 PREEMPT(voluntary) 
[   90.466272] Hardware name: LENOVO 82N6/LNVNB161216, BIOS GKCN65WW 01/16/2024
[   90.466274] RIP: 0010:__set_task_frozen+0x6a/0x90
[   90.466277] Code: f7 c5 00 20 00 00 74 06 40 f6 c5 03 74 33 81 e5 00 40 00 00 75 16 8b 15 d8 8c 52 01 85 d2 74 0c 8b 83 f0 0e 00 00 85 c0 74 02 <0f> 0b 8b 43 18 c7 43 18 00 80 00 00 89 43 1c b8 00 80 00 00 5b 5d
[   90.466279] RSP: 0018:ffffaa8f8bf5bab0 EFLAGS: 00010002
[   90.466282] RAX: 0000000000000002 RBX: ffff8bd9e5d12480 RCX: 0000000000000000
[   90.466284] RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff8bd9e5d12480
[   90.466285] RBP: 0000000000000000 R08: 00000000000000b4 R09: 0000000000000006
[   90.466287] R10: 00000000000000f0 R11: 0000000000000006 R12: ffffffff83dd9000
[   90.466288] R13: 0000000000000000 R14: ffff8bd9e5d13290 R15: ffff8bd9e5d12d80
[   90.466290] FS:  00007f5e1fc45980(0000) GS:ffff8bdfc4698000(0000) knlGS:0000000000000000
[   90.466292] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   90.466293] CR2: 00007f5e2043b488 CR3: 000000016063e000 CR4: 0000000000750ef0
[   90.466295] PKRU: 55555554
[   90.466296] Call Trace:
[   90.466298]  <TASK>
[   90.466301]  task_call_func+0x76/0xf0
[   90.466307]  freeze_task+0x87/0xf0
[   90.466312]  try_to_freeze_tasks+0xe1/0x2b0
[   90.466317]  ? lockdep_hardirqs_on+0x78/0x100
[   90.466322]  freeze_processes+0x46/0xb0
[   90.466326]  pm_suspend.cold+0x194/0x29f
[   90.466330]  state_store+0x68/0xc0
[   90.466335]  kernfs_fop_write_iter+0x172/0x240
[   90.466340]  vfs_write+0x249/0x560
[   90.466350]  ksys_write+0x6d/0xe0
[   90.466355]  do_syscall_64+0x95/0x6e0
[   90.466363]  ? entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   90.466366]  ? lockdep_hardirqs_on+0x78/0x100
[   90.466369]  ? do_syscall_64+0x1ad/0x6e0
[   90.466372]  ? find_held_lock+0x2b/0x80
[   90.466376]  ? do_sys_openat2+0xa4/0xe0
[   90.466379]  ? kmem_cache_free+0x13e/0x640
[   90.466385]  ? do_sys_openat2+0xa4/0xe0
[   90.466387]  ? do_sys_openat2+0xa4/0xe0
[   90.466390]  ? find_held_lock+0x2b/0x80
[   90.466395]  ? entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   90.466397]  ? lockdep_hardirqs_on+0x78/0x100
[   90.466400]  ? do_syscall_64+0x1ad/0x6e0
[   90.466402]  ? exc_page_fault+0x132/0x260
[   90.466409]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   90.466410] RIP: 0033:0x7f5e1fe99687
[   90.466414] Code: 48 89 fa 4c 89 df e8 58 b3 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
[   90.466415] RSP: 002b:00007fff3d312840 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[   90.466418] RAX: ffffffffffffffda RBX: 00007f5e1fc45980 RCX: 00007f5e1fe99687
[   90.466419] RDX: 0000000000000007 RSI: 000055c3cbfbce50 RDI: 0000000000000007
[   90.466421] RBP: 000055c3cbfbce50 R08: 0000000000000000 R09: 0000000000000000
[   90.466422] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000007
[   90.466423] R13: 000055c3cbfb22a0 R14: 00007f5e1ffefe80 R15: 00000000fffffff7
[   90.466435]  </TASK>
[   90.466437] irq event stamp: 118990
[   90.466438] hardirqs last  enabled at (118989): [<ffffffff849159b8>] _raw_spin_unlock_irqrestore+0x48/0x60
[   90.466441] hardirqs last disabled at (118990): [<ffffffff8491575b>] _raw_spin_lock_irqsave+0x5b/0x60
[   90.466443] softirqs last  enabled at (118630): [<ffffffff83cf99ed>] __irq_exit_rcu+0xcd/0x140
[   90.466446] softirqs last disabled at (118623): [<ffffffff83cf99ed>] __irq_exit_rcu+0xcd/0x140
[   90.466448] ---[ end trace 0000000000000000 ]---
[   90.466528] ------------[ cut here ]------------
[   90.466530] WARNING: CPU: 12 PID: 3770 at kernel/freezer.c:140 __set_task_frozen+0x6a/0x90
[   90.466535] Modules linked in: snd_seq_dummy snd_hrtimer snd_seq snd_seq_device xt_conntrack nft_chain_nat xt_MASQUERADE nf_nat nf_conntrack_netlink nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 xfrm_user xfrm_algo xt_addrtype nft_compat x_tables nf_tables br_netfilter bridge stp llc ccm overlay qrtr rfcomm cmac algif_hash algif_skcipher af_alg bnep binfmt_misc ext4 mbcache jbd2 nls_ascii nls_cp437 vfat fat iwlmvm intel_rapl_msr amd_atl intel_rapl_common snd_hda_codec_generic snd_hda_codec_hdmi btusb uvcvideo mac80211 btrtl videobuf2_vmalloc btintel kvm_amd videobuf2_memops snd_hda_intel btbcm uvc libarc4 snd_hda_codec btmtk videobuf2_v4l2 kvm snd_intel_dspcfg snd_hda_scodec_cs35l41_i2c snd_hwdep bluetooth videodev snd_hda_scodec_cs35l41 snd_hda_core irqbypass iwlwifi ideapad_laptop snd_soc_cs_amp_lib videobuf2_common ecdh_generic sparse_keymap snd_pcm cs_dsp rapl ecc mc wmi_bmof ee1004 platform_profile pcspkr cfg80211 snd_soc_cs35l41_lib snd_timer k10temp ccp sg rfkill battery snd soundcore cm32181
[   90.466665]  serial_multi_instantiate industrialio joydev ac evdev msr parport_pc ppdev lp parport nvme_fabrics fuse efi_pstore configfs nfnetlink efivarfs autofs4 crc32c_cryptoapi btrfs blake2b_generic xor raid6_pq dm_crypt sd_mod uas usbhid usb_storage amdgpu drm_client_lib i2c_algo_bit drm_ttm_helper ttm drm_exec drm_suballoc_helper drm_buddy drm_panel_backlight_quirks dm_mod gpu_sched ahci amdxcp r8169 libahci drm_display_helper ucsi_acpi realtek libata drm_kms_helper typec_ucsi hid_multitouch xhci_pci mdio_devres roles cec sp5100_tco hid_generic xhci_hcd libphy scsi_mod nvme video typec rc_core wdat_wdt i2c_piix4 ghash_clmulni_intel nvme_core mdio_bus serio_raw watchdog scsi_common usbcore thunderbolt crc16 i2c_hid_acpi i2c_smbus usb_common i2c_hid wmi hid drm button aesni_intel
[   90.466759] CPU: 12 UID: 0 PID: 3770 Comm: systemd-sleep Tainted: G        W           6.18.0-rc6-00040-g8b690556d8fe-dirty #168 PREEMPT(voluntary) 
[   90.466763] Tainted: [W]=WARN
[   90.466765] Hardware name: LENOVO 82N6/LNVNB161216, BIOS GKCN65WW 01/16/2024
[   90.466767] RIP: 0010:__set_task_frozen+0x6a/0x90
[   90.466770] Code: f7 c5 00 20 00 00 74 06 40 f6 c5 03 74 33 81 e5 00 40 00 00 75 16 8b 15 d8 8c 52 01 85 d2 74 0c 8b 83 f0 0e 00 00 85 c0 74 02 <0f> 0b 8b 43 18 c7 43 18 00 80 00 00 89 43 1c b8 00 80 00 00 5b 5d
[   90.466772] RSP: 0018:ffffaa8f8bf5bab0 EFLAGS: 00010002
[   90.466775] RAX: 0000000000000002 RBX: ffff8bda00862480 RCX: 0000000000000000
[   90.466777] RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff8bda00862480
[   90.466779] RBP: 0000000000000000 R08: 00000000000000b4 R09: 0000000000000006
[   90.466781] R10: 00000000000000f0 R11: 0000000000000006 R12: ffffffff83dd9000
[   90.466783] R13: 0000000000000000 R14: ffff8bda00863290 R15: ffff8bd9e5d45200
[   90.466785] FS:  00007f5e1fc45980(0000) GS:ffff8bdfc4698000(0000) knlGS:0000000000000000
[   90.466787] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   90.466789] CR2: 00007f5e2043b488 CR3: 000000016063e000 CR4: 0000000000750ef0
[   90.466791] PKRU: 55555554
[   90.466793] Call Trace:
[   90.466794]  <TASK>
[   90.466797]  task_call_func+0x76/0xf0
[   90.466805]  freeze_task+0x87/0xf0
[   90.466812]  try_to_freeze_tasks+0xe1/0x2b0
[   90.466817]  ? lockdep_hardirqs_on+0x78/0x100
[   90.466824]  freeze_processes+0x46/0xb0
[   90.466828]  pm_suspend.cold+0x194/0x29f
[   90.466833]  state_store+0x68/0xc0
[   90.466840]  kernfs_fop_write_iter+0x172/0x240
[   90.466846]  vfs_write+0x249/0x560
[   90.466859]  ksys_write+0x6d/0xe0
[   90.466866]  do_syscall_64+0x95/0x6e0
[   90.466877]  ? entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   90.466880]  ? lockdep_hardirqs_on+0x78/0x100
[   90.466883]  ? do_syscall_64+0x1ad/0x6e0
[   90.466888]  ? find_held_lock+0x2b/0x80
[   90.466894]  ? do_sys_openat2+0xa4/0xe0
[   90.466896]  ? kmem_cache_free+0x13e/0x640
[   90.466905]  ? do_sys_openat2+0xa4/0xe0
[   90.466908]  ? do_sys_openat2+0xa4/0xe0
[   90.466911]  ? find_held_lock+0x2b/0x80
[   90.466918]  ? entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   90.466921]  ? lockdep_hardirqs_on+0x78/0x100
[   90.466925]  ? do_syscall_64+0x1ad/0x6e0
[   90.466929]  ? exc_page_fault+0x132/0x260
[   90.466938]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   90.466940] RIP: 0033:0x7f5e1fe99687
[   90.466943] Code: 48 89 fa 4c 89 df e8 58 b3 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
[   90.466945] RSP: 002b:00007fff3d312840 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[   90.466949] RAX: ffffffffffffffda RBX: 00007f5e1fc45980 RCX: 00007f5e1fe99687
[   90.466950] RDX: 0000000000000007 RSI: 000055c3cbfbce50 RDI: 0000000000000007
[   90.466952] RBP: 000055c3cbfbce50 R08: 0000000000000000 R09: 0000000000000000
[   90.466954] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000007
[   90.466956] R13: 000055c3cbfb22a0 R14: 00007f5e1ffefe80 R15: 00000000fffffff7
[   90.466971]  </TASK>
[   90.466973] irq event stamp: 119140
[   90.466975] hardirqs last  enabled at (119139): [<ffffffff849159b8>] _raw_spin_unlock_irqrestore+0x48/0x60
[   90.466977] hardirqs last disabled at (119140): [<ffffffff8491575b>] _raw_spin_lock_irqsave+0x5b/0x60
[   90.466980] softirqs last  enabled at (118630): [<ffffffff83cf99ed>] __irq_exit_rcu+0xcd/0x140
[   90.466983] softirqs last disabled at (118623): [<ffffffff83cf99ed>] __irq_exit_rcu+0xcd/0x140
[   90.466987] ---[ end trace 0000000000000000 ]---
[   90.468818] Freezing user space processes completed (elapsed 0.003 seconds)
[   90.468822] OOM killer disabled.
[   90.468824] Freezing remaining freezable tasks
[   90.470358] Freezing remaining freezable tasks completed (elapsed 0.001 seconds)
[   90.470361] printk: Suspending console(s) (use no_console_suspend to debug)

#regzbot title: Intermittent suspend __set_task_frozen lock warnings
#regzbot introduced: a3f8f8662771285511ae26c4c8d3ba1cd22159b9