igt@xe_pm@s4* - abort - xe_pm* is trying to acquire lock:, at: efivarfs_actor, but task is already holding lock:, at: iterate_dir

https://gfx-ci.igk.intel.com/cibuglog-ng/testresult/2102796575?query_key=ab420852abe03f8275582026a1f040d2e5074dbe

<6> [92.610590] usb 1-2: reset full-speed USB device number 2 using xhci_hcd
<7> [92.750012] PM: hibernation: Basic memory bitmaps freed
<6> [92.750497] OOM killer enabled.
<6> [92.750505] Restarting tasks ... done.
<6> [92.757266] efivarfs: resyncing variable state
<4> [92.757686] 
<4> [92.757690] ============================================
<4> [92.757692] WARNING: possible recursive locking detected
<4> [92.757694] 6.14.0-rc2-xe+ #1 Not tainted
<4> [92.757697] --------------------------------------------
<4> [92.757699] xe_pm/2562 is trying to acquire lock:
<4> [92.757701] ffff8881123a1558 (&sb->s_type->i_mutex_key#12){++++}-{3:3}, at: efivarfs_actor+0x94/0x100
<4> [92.757708] 
but task is already holding lock:
<4> [92.757710] ffff8881112a9558 (&sb->s_type->i_mutex_key#12){++++}-{3:3}, at: iterate_dir+0x99/0x2b0
<4> [92.757716] 
other info that might help us debug this:
<4> [92.757718]  Possible unsafe locking scenario:



<4> [92.757720]        CPU0
<4> [92.757721]        ----
<4> [92.757723]   lock(&sb->s_type->i_mutex_key#12);
<4> [92.757725]   lock(&sb->s_type->i_mutex_key#12);
<4> [92.757728] 
 *** DEADLOCK ***



<4> [92.757730]  May be due to missing lock nesting notation



<4> [92.757732] 7 locks held by xe_pm/2562:
<4> [92.757734]  #0: ffff888113c89b38 (&f->f_pos_lock){+.+.}-{3:3}, at: fdget_pos+0x92/0xe0
<4> [92.757741]  #1: ffff888110764420 (sb_writers#5){.+.+}-{0:0}, at: ksys_write+0x7c/0x100
<4> [92.757746]  #2: ffff8881173f4a88 (&of->mutex#2){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x11e/0x210
<4> [92.757751]  #3: ffff8881029a7880 (kn->active#232){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x127/0x210
<4> [92.757756]  #4: ffffffff83298fc8 (system_transition_mutex){+.+.}-{3:3}, at: lock_system_sleep+0x2b/0x40
<4> [92.757762]  #5: ffffffff832aca70 ((pm_chain_head).rwsem){++++}-{3:3}, at: blocking_notifier_call_chain+0x2d/0x70
<4> [92.757769]  #6: ffff8881112a9558 (&sb->s_type->i_mutex_key#12){++++}-{3:3}, at: iterate_dir+0x99/0x2b0
<4> [92.757774] 
stack backtrace:
<4> [92.757776] CPU: 2 UID: 0 PID: 2562 Comm: xe_pm Not tainted 6.14.0-rc2-xe+ #1
<4> [92.757778] Hardware name: Micro-Star International Co., Ltd. MS-7D25/PRO Z690-A DDR4(MS-7D25), BIOS 1.10 12/13/2021
<4> [92.757778] Call Trace:
<4> [92.757779]  <TASK>
<4> [92.757779]  dump_stack_lvl+0x91/0xf0
<4> [92.757782]  dump_stack+0x10/0x20
<4> [92.757784]  print_deadlock_bug+0x23f/0x320
<4> [92.757786]  __lock_acquire+0x145f/0x2810
<4> [92.757788]  lock_acquire+0xc9/0x300
<4> [92.757790]  ? efivarfs_actor+0x94/0x100
<4> [92.757791]  down_write+0x3e/0xf0
<4> [92.757793]  ? efivarfs_actor+0x94/0x100
<4> [92.757794]  efivarfs_actor+0x94/0x100
<4> [92.757795]  dcache_readdir+0x7c/0x210
<4> [92.757797]  iterate_dir+0xcc/0x2b0
<4> [92.757798]  efivarfs_pm_notify+0x139/0x180
<4> [92.757799]  ? __pfx_efivarfs_actor+0x10/0x10
<4> [92.757801]  notifier_call_chain+0x4d/0x170
<4> [92.757803]  blocking_notifier_call_chain+0x47/0x70
<4> [92.757805]  pm_notifier_call_chain+0x1a/0x30
<4> [92.757807]  hibernate+0x259/0x480
<4> [92.757808]  state_store+0xd3/0xe0
<4> [92.757809]  kobj_attr_store+0xf/0x40
<4> [92.757810]  sysfs_kf_write+0x49/0x80

added feature: power/runtime PM platform: ADL_P platform: BMG platform: DG2 platform: LNL labels

Looks to be non-GPU related issue, as similar issue is seen even without loading Xe driver, build used - CI_DRM_16094-g24a5696cb262+

lnl_hibernate_without_xe_dmesg_log.txt [ 832.160558] ============================================ [ 832.165904] WARNING: possible recursive locking detected [ 832.172634] 6.14.0-rc2-CI_DRM_16094-g24a5696cb262+ #1 (closed) Not tainted [ 832.178765] -------------------------------------------- [ 832.185493] bash/1988 is trying to acquire lock: [ 832.190142] ffff88812ef54558 (&sb->s_type->i_mutex_key#11)++-{3:3}, at: efivarfs_actor+0x94/0x100 [ 832.200768] but task is already holding lock: [ 832.206630] ffff88812dc51558 (&sb->s_type->i_mutex_key#11)++-{3:3}, at: iterate_dir+0x99/0x2b0 [ 832.215627] other info that might help us debug this: [ 832.223567] Possible unsafe locking scenario:

[ 832.229512] CPU0 [ 832.231986] ---- [ 832.234456] lock(&sb->s_type->i_mutex_key#11); [ 832.239101] lock(&sb->s_type->i_mutex_key#11); [ 832.243744] *** DEADLOCK ***

[ 832.249697] May be due to missing lock nesting notation

[ 832.257898] 6 locks held by bash/1988: [ 832.261679] #0: ffff88811cd44420 (sb_writers#6){.+.+}-{0:0}, at: ksys_write+0x7c/0x100 [ 832.269722] #1 (closed): ffff8881206e6e88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x11e/0x210 [ 832.280015] #2 (closed): ffff8881042c6de0 (kn->active#168){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x127/0x210 [ 832.289266] #3 (closed): ffffffff83298fc8 (system_transition_mutex){+.+.}-{3:3}, at: lock_system_sleep+0x2b/0x40 [ 832.298781] #4 (closed): ffffffff832acab0 ((pm_chain_head).rwsem)++-{3:3}, at: blocking_notifier_call_chain+0x2d/0x70 [ 832.310455] #5: ffff88812dc51558 (&sb->s_type->i_mutex_key#11)++-{3:3}, at: iterate_dir+0x99/0x2b0 [ 832.319882] stack backtrace: [ 832.324265] CPU: 3 UID: 0 PID: 1988 Comm: bash Not tainted 6.14.0-rc2-CI_DRM_16094-g24a5696cb262+ #1 (closed) [ 832.324267] Hardware name: Intel Corporation Lunar Lake Client Platform/LNL-M LP5 RVP1, BIOS LNLMFWI1.R00.3222.D97.2411281331 11/28/2024 [ 832.324268] Call Trace: [ 832.324268] [ 832.324269] dump_stack_lvl+0x91/0xf0 [ 832.324272] dump_stack+0x10/0x20 [ 832.324273] print_deadlock_bug+0x23f/0x320 [ 832.324276] __lock_acquire+0x145f/0x2810 [ 832.324278] lock_acquire+0xc9/0x300 [ 832.324279] ? efivarfs_actor+0x94/0x100 [ 832.324281] down_write+0x3e/0xf0 [ 832.324283] ? efivarfs_actor+0x94/0x100 [ 832.324284] efivarfs_actor+0x94/0x100 [ 832.324285] dcache_readdir+0x7c/0x210 [ 832.324287] iterate_dir+0xcc/0x2b0 [ 832.324288] efivarfs_pm_notify+0x139/0x180 [ 832.324289] ? __pfx_efivarfs_actor+0x10/0x10 [ 832.324293] notifier_call_chain+0x4d/0x170 [ 832.324295] blocking_notifier_call_chain+0x47/0x70 [ 832.324297] pm_notifier_call_chain+0x1a/0x30 [ 832.324299] hibernate+0x259/0x480 [ 832.324299] state_store+0xd3/0xe0 [ 832.324301] kobj_attr_store+0xf/0x40 [ 832.324302] sysfs_kf_write+0x49/0x80 [ 832.324303] kernfs_fop_write_iter+0x164/0x210 [ 832.324304] vfs_write+0x2b9/0x570 [ 832.324307] ksys_write+0x7c/0x100 [ 832.324308] __x64_sys_write+0x19/0x30 [ 832.324309] x64_sys_call+0x2c4/0x2650 [ 832.324311] do_syscall_64+0x91/0x180 [ 832.324313] ? syscall_exit_to_user_mode+0x95/0x260 [ 832.324314] ? do_syscall_64+0x9d/0x180 [ 832.324315] ? do_fcntl+0x34c/0x9a0 [ 832.324317] ? trace_hardirqs_off+0x5d/0xe0 [ 832.324319] ? syscall_exit_to_user_mode+0x95/0x260 [ 832.324320] ? do_syscall_64+0x9d/0x180 [ 832.324321] ? do_syscall_64+0x9d/0x180 [ 832.324322] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 832.324324] RIP: 0033:0x78e190b14a77