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INFO: rcu detected stall in sys_mkdir (9)

Status: upstream: reported syz repro on 2025/01/25 04:35
Subsystems: mm
Labels: prio:high
[Documentation on labels]
Reported-by: syzbot+21889604e13b9172a50b@syzkaller.appspotmail.com
First crash: 526d, last: 43d
Cause bisection: introduced by (bisect log) :
commit 5a781ccbd19e4664babcbe4b4ead7aa2b9283d22
Author: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Date: Sat Sep 29 00:59:43 2018 +0000

  tc: Add support for configuring the taprio scheduler

Crash: BUG: soft lockup in do_idle (log)
Repro: syz .config
  
Fix bisection: failed (error log, bisect log)
  
▶ ▼ ✨ AI Jobs (1)
ID Workflow Result Correct Bug Created Started Finished Revision Error
692ba40c-667c-4a44-9dc3-8d24a55a8553 assessment-security DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ✅ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ✅ ❓ INFO: rcu detected stall in sys_mkdir (9) 2026/05/24 07:05 2026/05/24 07:05 2026/05/24 08:04 c69befb30ac10e158cc9d1557b508ee3f0eca1de 

			
				
	

	
	



			

		

	

	
	

		

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			[syzbot] [ext4?] INFO: rcu detected stall in sys_mkdir (9)
			0 (1)
			2025/01/25 04:35
		

	
	




			
			
		

	

	
	

		

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			Similar bugs (16)
		

		

			




	
	

		
			Kernel
		
		Title
		
			Rank
			
🛈

		
		Repro
		Cause bisect
		Fix bisect
		Count
		Last
		Reported
		
		
		
			Patched
		
		
			Status
		
		
	

	
	
	
		

			linux-5.15
			
				INFO: rcu detected stall in sys_mkdir
			
			1
			
			
			
			1
			551d
			
				
					551d
				
			
			
			
			
				0/3
			
			
				
					
						auto-obsoleted due to no activity on 2025/04/06 10:37
					
				
			
			
		

	
		

			linux-6.1
			
				INFO: rcu detected stall in sys_mkdir
			
			1
			
			
			
			1
			484d
			
				
					484d
				
			
			
			
			
				0/3
			
			
				
					
						auto-obsoleted due to no activity on 2025/06/11 20:27
					
				
			
			
		

	
		

			linux-6.1
			
				INFO: rcu detected stall in sys_mkdir (2)
					origin:lts-only
			
			1
			C
			
			error
			2
			7d11h
			
				
					191d
				
			
			
			
			
				0/3
			
			
				
					
						upstream: reported C repro on 2025/12/22 06:04
					
				
			
			
		

	
		

			upstream
			
				INFO: rcu detected stall in sys_mkdir (3)
					cgroups
			
			1
			
			
			
			1
			2366d
			
				
					2366d
				
			
			
			
			
				0/29
			
			
				
					
						closed as invalid on 2020/01/08 05:33
					
				
			
			
		

	
		

			linux-5.15
			
				INFO: rcu detected stall in sys_mkdir (3)
			
			1
			
			
			
			1
			115d
			
				
					115d
				
			
			
			
			
				0/3
			
			
				
					
						auto-obsoleted due to no activity on 2026/06/16 08:45
					
				
			
			
		

	
		

			upstream
			
				INFO: rcu detected stall in sys_mkdir (7)
					ext4
			
			1
			
			
			
			1
			1041d
			
				
					1041d
				
			
			
			
			
				0/29
			
			
				
					
						auto-obsoleted due to no activity on 2023/10/24 07:40
					
				
			
			
		

	
		

			linux-5.15
			
				INFO: rcu detected stall in sys_mkdir (2)
			
			1
			
			
			
			1
			285d
			
				
					285d
				
			
			
			
			
				0/3
			
			
				
					
						auto-obsoleted due to no activity on 2025/12/28 08:27
					
				
			
			
		

	
		

			linux-6.6
			
				INFO: rcu detected stall in sys_mkdir
			
			1
			
			
			
			1
			316d
			
				
					316d
				
			
			
			
			
				0/2
			
			
				
					
						auto-obsoleted due to no activity on 2025/11/27 00:13
					
				
			
			
		

	
		

			upstream
			
				INFO: rcu detected stall in sys_mkdir
					mm
			
			1
			
			
			
			2
			2534d
			
				
					2536d
				
			
			
			
			
				0/29
			
			
				
					
						auto-closed as invalid on 2019/10/25 14:21
					
				
			
			
		

	
		

			upstream
			
				INFO: rcu detected stall in sys_mkdir (2)
					cgroups
			
			1
			
			
			
			5
			2401d
			
				
					2402d
				
			
			
			
			
				0/29
			
			
				
					
						closed as invalid on 2019/12/04 14:04
					
				
			
			
		

	
		

			upstream
			
				INFO: rcu detected stall in sys_mkdir (6)
					ext4
			
			1
			
			
			
			2
			1612d
			
				
					1621d
				
			
			
			
			
				0/29
			
			
				
					
						closed as invalid on 2022/02/08 09:50
					
				
			
			
		

	
		

			upstream
			
				INFO: rcu detected stall in sys_mkdir (4)
					mm
			
			1
			
			
			
			2
			2366d
			
				
					2366d
				
			
			
			
			
				0/29
			
			
				
					
						closed as invalid on 2020/01/09 08:13
					
				
			
			
		

	
		

			upstream
			
				INFO: rcu detected stall in sys_mkdir (8)
					fs
			
			1
			
			
			
			1
			640d
			
				
					640d
				
			
			
			
			
				0/29
			
			
				
					
						auto-obsoleted due to no activity on 2024/12/28 09:04
					
				
			
			
		

	
		

			upstream
			
				INFO: rcu detected stall in sys_mkdir (5)
					tomoyo
			
			1
			
			
			
			1
			1748d
			
				
					1748d
				
			
			
			
			
				0/29
			
			
				
					
						auto-closed as invalid on 2021/12/15 23:48
					
				
			
			
		

	
		

			linux-6.6
			
				INFO: rcu detected stall in sys_mkdir (2)
			
			1
			
			
			
			1
			208d
			
				
					208d
				
			
			
			
			
				0/2
			
			
				
					
						auto-obsoleted due to no activity on 2026/03/14 17:07
					
				
			
			
		

	
		

			android-5-15
			
				BUG: soft lockup in sys_mkdir
			
			1
			
			
			
			2
			775d
			
				
					779d
				
			
			
			
			
				0/2
			
			
				
					
						auto-obsoleted due to no activity on 2024/08/15 15:43
					
				
			
			
		

	
	





			
			
			
			
		

	

	
	

		

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				2026/06/27 17:46
				
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				2026/06/01 16:20
				
					43m
				
				
					
						retest repro
					
				
				
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				2026/06/01 16:19
				
					32m
				
				
					
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				2026/04/18 01:59
				
					20m
				
				
					
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				2026/04/18 02:14
				
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				2025/11/12 19:44
				
					25m
				
				
					
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				2025/09/03 18:50
				
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				2025/06/08 06:13
				
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				2025/02/04 09:36
				
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			Fix bisection attempts (6)
		

		

			
			

	

		
		
		

			
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				2026/02/06 15:47
				
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				2025/12/19 06:14
				
					2h24m
				
				
					
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				2025/11/19 02:23
				
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				2025/06/11 23:44
				
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				2025/03/30 01:22
				
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				2025/02/27 18:39
				
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Sample crash report:

	
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P6031/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=24317, q=1267 ncpus=2)
task:udevd           state:R  running task    
 stack:27240 pid:6031  tgid:6031  ppid:4984   task_flags:0x400140 flags:0x00080001
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1295/0x67a0 kernel/sched/core.c:7189
 preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7513
 irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:468 [inline]
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x205/0x7e0 kernel/entry/common.c:164
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_release+0x19e/0x310 kernel/locking/lockdep.c:5893
Code: ff 65 0f c1 05 db e2 26 12 83 f8 01 0f 85 28 01 00 00 9c 58 f6 c4 02 0f 85 13 01 00 00 41 f7 c6 00 02 00 00 0f 85 c0 00 00 00 <48> 8b 44 24 10 65 48 2b 05 2d 9b 26 12 0f 85 4e 01 00 00 48 83 c4
RSP: 0018:ffffc9000391f6f8 EFLAGS: 00000206

RAX: 0000000000000046 RBX: ffffffff8e7e5620 RCX: ffffc9000391f704
RDX: 0000000000000002 RSI: ffffffff8defcec5 RDI: ffffffff8c1c3a00
RBP: ffffffff81b7d1ae R08: 0000000000000001 R09: 0000000000000007
R10: 0000000000000200 R11: 000000000000b7f1 R12: ffff8880281dca00
R13: ffffc9000391f800 R14: 0000000000000202 R15: 0000000000000003
 rcu_lock_release include/linux/rcupdate.h:310 [inline]
 rcu_read_unlock include/linux/rcupdate.h:869 [inline]
 class_rcu_destructor include/linux/rcupdate.h:1181 [inline]
 unwind_next_frame+0x3c3/0x2090 arch/x86/kernel/unwind_orc.c:495
 __unwind_start+0x3d1/0x7f0 arch/x86/kernel/unwind_orc.c:787
 unwind_start arch/x86/include/asm/unwind.h:64 [inline]
 arch_stack_walk+0x73/0xf0 arch/x86/kernel/stacktrace.c:24
 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
 kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
 kasan_save_track+0x14/0x30 mm/kasan/common.c:78
 poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
 __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:415
 kmalloc_noprof include/linux/slab.h:950 [inline]
 kzalloc_noprof include/linux/slab.h:1188 [inline]
 simple_xattrs_alloc+0x40/0xd0 fs/xattr.c:1637
 class_simple_xattrs_constructor include/linux/xattr.h:165 [inline]
 shmem_initxattrs+0x7d/0x6c0 mm/shmem.c:4237
 security_inode_init_security+0x242/0x370 security/security.c:1370
 shmem_mknod+0x2ce/0x480 mm/shmem.c:3868
 shmem_mkdir+0x31/0x80 mm/shmem.c:3923
 vfs_mkdir+0x361/0x850 fs/namei.c:5261
 filename_mkdirat+0x48b/0x5e0 fs/namei.c:5294
 __do_sys_mkdir fs/namei.c:5321 [inline]
 __se_sys_mkdir fs/namei.c:5318 [inline]
 __x64_sys_mkdir+0x6b/0x90 fs/namei.c:5318
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7f4b514c37
RSP: 002b:00007fff9c441b48 EFLAGS: 00000246
 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007fff9c443893 RCX: 00007f7f4b514c37
RDX: 0000000000000052 RSI: 00000000000001ed RDI: 00007fff9c441b50
RBP: 00007fff9c442c10 R08: 00007fff9c443890 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff9c443840
R13: 0000000000000000 R14: 00005583cbc4f7d4 R15: 0000000000000052
 </TASK>
rcu: rcu_preempt kthread starved for 10502 jiffies! g24317 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R
  running task    
 stack:28904 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1295/0x67a0 kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0xdd/0x390 kernel/sched/core.c:7283
 schedule_timeout+0x127/0x280 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1a9/0x900 kernel/rcu/tree.c:2095
 rcu_gp_kthread+0x179/0x230 kernel/rcu/tree.c:2297
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
R10: ffffffffffffffff R11: 0000000000000202 R12: 0000558407d724e0
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5948 Comm: kworker/0:4 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Workqueue: wg-crypt-wg1 wg_packet_decrypt_worker
RIP: 0010:lookup_chain_cache kernel/locking/lockdep.c:3802 [inline]
RIP: 0010:lookup_chain_cache_add kernel/locking/lockdep.c:3821 [inline]
RIP: 0010:validate_chain kernel/locking/lockdep.c:3876 [inline]
RIP: 0010:__lock_acquire+0x879/0x2630 kernel/locking/lockdep.c:5237
Code: 4d 0f af e7 49 c1 ec 2d 4a 8b 04 e5 20 7c 4f 97 4e 8d 34 e5 20 7c 4f 97 48 85 c0 74 1f 48 83 e8 08 48 85 c0 74 16 48 8b 50 18 <49> 39 d7 0f 84 a7 fd ff ff 48 8b 40 08 48 85 c0 75 e1 8b 0d 6f 33
RSP: 0018:ffffc900000070a0 EFLAGS: 00000086
RAX: ffffffff94282960 RBX: ffff888020708cd0 RCX: 0000000000000008
RDX: a55923ad401c4804 RSI: 0000000057371f2a RDI: 000000002d5ff032
RBP: ffff888020708000 R08: 00000000d628d108 R09: 000000000000000d
R10: 0000000000000008 R11: 0000000000000000 R12: 000000000002e17d
R13: 000000000000000d R14: ffffffff97668808 R15: a55923ad401c4804
FS:  0000000000000000(0000) GS:ffff88812436d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7f4b5909c0 CR3: 000000004664d000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 lock_acquire kernel/locking/lockdep.c:5868 [inline]
 lock_acquire+0x1b1/0x370 kernel/locking/lockdep.c:5825
 __raw_spin_lock include/linux/spinlock_api_smp.h:158 [inline]
 _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:158
 console_lock_spinning_enable+0x2f/0x80 kernel/printk/printk.c:1896
 console_emit_next_record kernel/printk/printk.c:3177 [inline]
 console_flush_one_record+0x739/0xe50 kernel/printk/printk.c:3269
 console_flush_all kernel/printk/printk.c:3343 [inline]
 __console_flush_and_unlock kernel/printk/printk.c:3373 [inline]
 console_unlock+0x103/0x260 kernel/printk/printk.c:3413
 vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2479
 _printk+0xcf/0x110 kernel/printk/printk.c:2504
 __show_regs.cold+0x209/0x554 arch/x86/kernel/process_64.c:91
 __show_trace_log_lvl+0x26a/0x2c4 arch/x86/kernel/dumpstack.c:298
 show_trace_log_lvl arch/x86/kernel/dumpstack.c:319 [inline]
 show_stack+0x47/0x70 arch/x86/kernel/dumpstack.c:337
 sched_show_task kernel/sched/core.c:8140 [inline]
 sched_show_task+0x471/0x610 kernel/sched/core.c:8115
 show_state_filter+0xee/0x390 kernel/sched/core.c:8185
 k_spec drivers/tty/vt/keyboard.c:659 [inline]
 k_spec+0x100/0x140 drivers/tty/vt/keyboard.c:648
 kbd_keycode drivers/tty/vt/keyboard.c:1565 [inline]
 kbd_event+0xe4c/0x1b70 drivers/tty/vt/keyboard.c:1583
 input_handle_events_default+0x119/0x1b0 drivers/input/input.c:2558
 input_pass_values+0x753/0x880 drivers/input/input.c:128
 input_event_dispose drivers/input/input.c:342 [inline]
 input_handle_event+0x7e4/0x1500 drivers/input/input.c:370
 input_event drivers/input/input.c:396 [inline]
 input_event+0x83/0xb0 drivers/input/input.c:391
 input_sync include/linux/input.h:464 [inline]
 hidinput_report_event+0xb2/0x100 drivers/hid/hid-input.c:1779
 hid_report_raw_event+0x29f/0x1420 drivers/hid/hid-core.c:2102
 __hid_input_report.constprop.0+0x349/0x470 drivers/hid/hid-core.c:2166
 hid_irq_in+0x55d/0x710 drivers/hid/usbhid/hid-core.c:286
 __usb_hcd_giveback_urb+0x38d/0x610 drivers/usb/core/hcd.c:1657
 usb_hcd_giveback_urb+0x3ca/0x4a0 drivers/usb/core/hcd.c:1741
 dummy_timer+0xda1/0x36c0 drivers/usb/gadget/udc/dummy_hcd.c:2005
 __run_hrtimer kernel/time/hrtimer.c:1930 [inline]
 __hrtimer_run_queues+0x470/0xa00 kernel/time/hrtimer.c:1994
 hrtimer_run_softirq+0x17d/0x2c0 kernel/time/hrtimer.c:2011
 handle_softirqs+0x1ea/0xa00 kernel/softirq.c:622
 do_softirq kernel/softirq.c:523 [inline]
 do_softirq+0xac/0xe0 kernel/softirq.c:510
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0xf8/0x120 kernel/softirq.c:450
 spin_unlock_bh include/linux/spinlock.h:396 [inline]
 ptr_ring_consume_bh include/linux/ptr_ring.h:377 [inline]
 wg_packet_decrypt_worker+0x35e/0x540 drivers/net/wireguard/receive.c:499
 process_one_work+0xa0e/0x1980 kernel/workqueue.c:3314
 process_scheduled_works kernel/workqueue.c:3397 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3478
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
R13: 00007fff9c444650 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
task:kworker/u9:2    state:I stack:27608 pid:5683  tgid:5683  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue:  0x0 (hci1)
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1295/0x67a0 kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0xdd/0x390 kernel/sched/core.c:7283
 worker_thread+0x53b/0xe50 kernel/workqueue.c:3493
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
task:udevd           state:S stack:27240 pid:5686  tgid:5686  ppid:4984   task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1295/0x67a0 kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0xdd/0x390 kernel/sched/core.c:7283
 schedule_hrtimeout_range_clock+0x2d0/0x310 kernel/time/sleep_timeout.c:207
 ep_poll fs/eventpoll.c:2030 [inline]
 do_epoll_wait+0xdc3/0x1020 fs/eventpoll.c:2464
 __do_sys_epoll_wait fs/eventpoll.c:2472 [inline]
 __se_sys_epoll_wait fs/eventpoll.c:2467 [inline]
 __x64_sys_epoll_wait+0x194/0x290 fs/eventpoll.c:2467
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7f4b4a7407
RSP: 002b:00007fff9c4445c0 EFLAGS: 00000202 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 00007f7f4bb68880 RCX: 00007f7f4b4a7407
RDX: 0000000000000004 RSI: 00007fff9c444650 RDI: 0000000000000004
RBP: 0000558407b272c0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000202 R12: 0000558407ea6ba0
R13: 00007fff9c444650 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
task:udevd           state:S stack:27144 pid:5687  tgid:5687  ppid:4984   task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1295/0x67a0 kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0xdd/0x390 kernel/sched/core.c:7283
 schedule_hrtimeout_range_clock+0x2d0/0x310 kernel/time/sleep_timeout.c:207
 ep_poll fs/eventpoll.c:2030 [inline]
 do_epoll_wait+0xdc3/0x1020 fs/eventpoll.c:2464
 __do_sys_epoll_wait fs/eventpoll.c:2472 [inline]
 __se_sys_epoll_wait fs/eventpoll.c:2467 [inline]
 __x64_sys_epoll_wait+0x194/0x290 fs/eventpoll.c:2467
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7f4b4a7407
RSP: 002b:00007fff9c4445c0 EFLAGS: 00000202 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 00007f7f4bb68880 RCX: 00007f7f4b4a7407
RDX: 0000000000000004 RSI: 00007fff9c444650 RDI: 0000000000000004
RBP: 0000558407b272c0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000202 R12: 0000558407d99b40
R13: 00007fff9c444650 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
task:kworker/u9:3    state:I stack:26904 pid:5774  tgid:5774  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue:  0x0 (hci6)
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1295/0x67a0 kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0xdd/0x390 kernel/sched/core.c:7283
 worker_thread+0x53b/0xe50 kernel/workqueue.c:3493
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
task:kworker/u9:4    state:I stack:26248 pid:5777  tgid:5777  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue:  0x0 (hci9)
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1295/0x67a0 kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0xdd/0x390 kernel/sched/core.c:7283
 worker_thread+0x53b/0xe50 kernel/workqueue.c:3493
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
task:kworker/u9:5    state:I stack:27352 pid:5786  tgid:5786  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue:  0x0 (hci4)
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1295/0x67a0 kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0xdd/0x390 kernel/sched/core.c:7283
 worker_thread+0x53b/0xe50 kernel/workqueue.c:3493
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
task:kworker/1:4     state:I stack:25896 pid:5918  tgid:5918  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue:  0x0 (mld)
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1295/0x67a0 kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0xdd/0x390 kernel/sched/core.c:7283
 worker_thread+0x53b/0xe50 kernel/workqueue.c:3493
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
task:kworker/1:5     state:D stack:26104 pid:5940  tgid:5940  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1295/0x67a0 kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0xdd/0x390 kernel/sched/core.c:7283
 schedule_timeout+0x1b2/0x280 kernel/time/sleep_timeout.c:75
 do_wait_for_common kernel/sched/completion.c:100 [inline]
 __wait_for_common+0x2e7/0x4c0 kernel/sched/completion.c:121
 devtmpfs_submit_req drivers/base/devtmpfs.c:121 [inline]
 devtmpfs_create_node+0x1e2/0x290 drivers/base/devtmpfs.c:152
 device_add+0x114e/0x1950 drivers/base/core.c:3665
 usb_new_device.cold+0x685/0x115c drivers/usb/core/hub.c:2695
 hub_port_connect drivers/usb/core/hub.c:5567 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
 port_event drivers/usb/core/hub.c:5871 [inline]
 hub_event+0x314d/0x4af0 drivers/usb/core/hub.c:5953
 process_one_work+0xa0e/0x1980 kernel/workqueue.c:3314
 process_scheduled_works kernel/workqueue.c:3397 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3478
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
task:kworker/0:4     state:R  running task     stack:22136 pid:5948  tgid:5948  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: wg-crypt-wg1 wg_packet_decrypt_worker
Call Trace:
 <IRQ>
 sched_show_task kernel/sched/core.c:8140 [inline]
 sched_show_task+0x471/0x610 kernel/sched/core.c:8115
 show_state_filter+0xee/0x390 kernel/sched/core.c:8185
 k_spec drivers/tty/vt/keyboard.c:659 [inline]
 k_spec+0x100/0x140 drivers/tty/vt/keyboard.c:648
 kbd_keycode drivers/tty/vt/keyboard.c:1565 [inline]
 kbd_event+0xe4c/0x1b70 drivers/tty/vt/keyboard.c:1583
 input_handle_events_default+0x119/0x1b0 drivers/input/input.c:2558
 input_pass_values+0x753/0x880 drivers/input/input.c:128
 input_event_dispose drivers/input/input.c:342 [inline]
 input_handle_event+0x7e4/0x1500 drivers/input/input.c:370
 input_event drivers/input/input.c:396 [inline]
 input_event+0x83/0xb0 drivers/input/input.c:391
 input_sync include/linux/input.h:464 [inline]
 hidinput_report_event+0xb2/0x100 drivers/hid/hid-input.c:1779
 hid_report_raw_event+0x29f/0x1420 drivers/hid/hid-core.c:2102
 __hid_input_report.constprop.0+0x349/0x470 drivers/hid/hid-core.c:2166
 hid_irq_in+0x55d/0x710 drivers/hid/usbhid/hid-core.c:286
 __usb_hcd_giveback_urb+0x38d/0x610 drivers/usb/core/hcd.c:1657
 usb_hcd_giveback_urb+0x3ca/0x4a0 drivers/usb/core/hcd.c:1741
 dummy_timer+0xda1/0x36c0 drivers/usb/gadget/udc/dummy_hcd.c:2005
 __run_hrtimer kernel/time/hrtimer.c:1930 [inline]
 __hrtimer_run_queues+0x470/0xa00 kernel/time/hrtimer.c:1994
 hrtimer_run_softirq+0x17d/0x2c0 kernel/time/hrtimer.c:2011
 handle_softirqs+0x1ea/0xa00 kernel/softirq.c:622
 do_softirq kernel/softirq.c:523 [inline]
 do_softirq+0xac/0xe0 kernel/softirq.c:510
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0xf8/0x120 kernel/softirq.c:450
 spin_unlock_bh include/linux/spinlock.h:396 [inline]
 ptr_ring_consume_bh include/linux/ptr_ring.h:377 [inline]
 wg_packet_decrypt_worker+0x35e/0x540 drivers/net/wireguard/receive.c:499
 process_one_work+0xa0e/0x1980 kernel/workqueue.c:3314
 process_scheduled_works kernel/workqueue.c:3397 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3478
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
task:kworker/0:5     state:I stack:26712 pid:5952  tgid:5952  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue:  0x0 (events)
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1295/0x67a0 kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0xdd/0x390 kernel/sched/core.c:7283
 worker_thread+0x53b/0xe50 kernel/workqueue.c:3493
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
task:kworker/0:6     state:I stack:22184 pid:5964  tgid:5964  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue:  0x0 (events_long)
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1295/0x67a0 kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0xdd/0x390 kernel/sched/core.c:7283
 worker_thread+0x53b/0xe50 kernel/workqueue.c:3493
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
task:udevd           state:S stack:26248 pid:5974  tgid:5974  ppid:4984   task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1295/0x67a0 kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0xdd/0x390 kernel/sched/core.c:7283
 schedule_hrtimeout_range_clock+0x2d0/0x310 kernel/time/sleep_timeout.c:207
 ep_poll fs/eventpoll.c:2030 [inline]
 do_epoll_wait+0xdc3/0x1020 fs/eventpoll.c:2464
 __do_sys_epoll_wait fs/eventpoll.c:2472 [inline]
 __se_sys_epoll_wait fs/eventpoll.c:2467 [inline]
 __x64_sys_epoll_wait+0x194/0x290 fs/eventpoll.c:2467
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7f4b4a7407
RSP: 002b:00007fff9c4445c0 EFLAGS: 00000202 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 00007f7f4bb68880 RCX: 00007f7f4b4a7407
RDX: 0000000000000004 RSI: 00007fff9c444650 RDI: 0000000000000004
RBP: 0000558407b272c0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000202 R12: 0000558407d68340
R13: 00007fff9c444650 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
task:kworker/0:7     state:I stack:25896 pid:5980  tgid:5980  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue:  0x0 (events)
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1295/0x67a0 kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0xdd/0x390 kernel/sched/core.c:7283
 worker_thread+0x53b/0xe50 kernel/workqueue.c:3493
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
task:udevd           state:S stack:27608 pid:6019  tgid:6019  ppid:4984   task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1295/0x67a0 kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0xdd/0x390 kernel/sched/core.c:7283
 schedule_hrtimeout_range_clock+0x2d0/0x310 kernel/time/sleep_timeout.c:207
 ep_poll fs/eventpoll.c:2030 [inline]
 do_epoll_wait+0xdc3/0x1020 fs/eventpoll.c:2464
 __do_sys_epoll_wait fs/eventpoll.c:2472 [inline]
 __se_sys_epoll_wait fs/eventpoll.c:2467 [inline]
 __x64_sys_epoll_wait+0x194/0x290 fs/eventpoll.c:2467
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7f4b4a7407
RSP: 002b:00007fff9c4445c0 EFLAGS: 00000202 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 00007f7f4bb68880 RCX: 00007f7f4b4a7407
RDX: 0000000000000004 RSI: 00007fff9c444650 RDI: 0000000000000004
RBP: 0000558407b272c0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000202 R12: 0000558407b2a080
R13: 00007fff9c444650 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
task:udevd           state:S stack:27240 pid:6027  tgid:6027  ppid:4984   task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1295/0x67a0 kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0xdd/0x390 kernel/sched/core.c:7283
 schedule_hrtimeout_range_clock+0x2d0/0x310 kernel/time/sleep_timeout.c:207
 ep_poll fs/eventpoll.c:2030 [inline]
 do_epoll_wait+0xdc3/0x1020 fs/eventpoll.c:2464
 __do_sys_epoll_wait fs/eventpoll.c:2472 [inline]
 __se_sys_epoll_wait fs/eventpoll.c:2467 [inline]
 __x64_sys_epoll_wait+0x194/0x290 fs/eventpoll.c:2467
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7f4b4a7407
RSP: 002b:00007fff9c4445c0 EFLAGS: 00000202 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 00007f7f4bb68880 RCX: 00007f7f4b4a7407
RDX: 0000000000000004 RSI: 00007fff9c444650 RDI: 0000000000000004
RBP: 0000558407b272c0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000202 R12: 0000558407d7b070
R13: 00007fff9c444650 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
task:udevd           state:S stack:27976 pid:6028  tgid:6028  ppid:4984   task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1295/0x67a0 kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0xdd/0x390 kernel/sched/core.c:7283
 schedule_hrtimeout_range_clock+0x2d0/0x310 kernel/time/sleep_timeout.c:207
 ep_poll fs/eventpoll.c:2030 [inline]
 do_epoll_wait+0xdc3/0x1020 fs/eventpoll.c:2464
 __do_sys_epoll_wait fs/eventpoll.c:2472 [inline]
 __se_sys_epoll_wait fs/eventpoll.c:2467 [inline]
 __x64_sys_epoll_wait+0x194/0x290 fs/eventpoll.c:2467
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7f4b4a7407
RSP: 002b:00007fff9c4445c0 EFLAGS: 00000202 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 00007f7f4bb68880 RCX: 00007f7f4b4a7407
RDX: 0000000000000004 RSI: 00007fff9c444650 RDI: 0000000000000004
RBP: 0000558407b272c0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000202 R12: 0000558407b2a7f0
R13: 00007fff9c444650 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
task:udevd           state:S stack:27624 pid:6029  tgid:6029  ppid:4984   task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1295/0x67a0 kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0xdd/0x390 kernel/sched/core.c:7283
 schedule_hrtimeout_range_clock+0x2d0/0x310 kernel/time/sleep_timeout.c:207
 ep_poll fs/eventpoll.c:2030 [inline]
 do_epoll_wait+0xdc3/0x1020 fs/eventpoll.c:2464
 __do_sys_epoll_wait fs/eventpoll.c:2472 [inline]
 __se_sys_epoll_wait fs/eventpoll.c:2467 [inline]
 __x64_sys_epoll_wait+0x194/0x290 fs/eventpoll.c:2467
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7f4b4a7407
RSP: 002b:00007fff9c4445c0 EFLAGS: 00000202 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 00007f7f4bb68880 RCX: 00007f7f4b4a7407
RDX: 0000000000000004 RSI: 00007fff9c444650 RDI: 0000000000000004
RBP: 0000558407b272c0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000202 R12: 0000558407b2a7f0
R13: 00007fff9c444650 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
task:udevd           state:R  running task     stack:26168 pid:6030  tgid:6030  ppid:4984   task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1295/0x67a0 kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0xdd/0x390 kernel/sched/core.c:7283
 schedule_hrtimeout_range_clock+0x213/0x310 kernel/time/sleep_timeout.c:216
 ep_poll fs/eventpoll.c:2030 [inline]
 do_epoll_wait+0xdc3/0x1020 fs/eventpoll.c:2464
 __do_sys_epoll_wait fs/eventpoll.c:2472 [inline]
 __se_sys_epoll_wait fs/eventpoll.c:2467 [inline]
 __x64_sys_epoll_wait+0x194/0x290 fs/eventpoll.c:2467
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7f4b4a7407
RSP: 002b:00007fff9c43de90 EFLAGS: 00000202 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 00007f7f4bb68880 RCX: 00007f7f4b4a7407
RDX: 0000000000000004 RSI: 00007fff9c43df70 RDI: 0000000000000009
RBP: 00007fff9c43df70 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000002c2ca R11: 0000000000000202 R12: 0000558407d74680
R13: 0000000000000009 R14: 0000000000001a84 R15: 0000000000001a84
 </TASK>
task:udevd           state:R  running task     stack:27240 pid:6031  tgid:6031  ppid:4984   task_flags:0x400140 flags:0x00080001
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1295/0x67a0 kernel/sched/core.c:7189
 preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7513
 irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:468 [inline]
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x205/0x7e0 kernel/entry/common.c:164
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_release+0x19e/0x310 kernel/locking/lockdep.c:5893
Code: ff 65 0f c1 05 db e2 26 12 83 f8 01 0f 85 28 01 00 00 9c 58 f6 c4 02 0f 85 13 01 00 00 41 f7 c6 00 02 00 00 0f 85 c0 00 00 00 <48> 8b 44 24 10 65 48 2b 05 2d 9b 26 12 0f 85 4e 01 00 00 48 83 c4
RSP: 0018:ffffc9000391f6f8 EFLAGS: 00000206
RAX: 0000000000000046 RBX: ffffffff8e7e5620 RCX: ffffc9000391f704
RDX: 0000000000000002 RSI: ffffffff8defcec5 RDI: ffffffff8c1c3a00
RBP: ffffffff81b7d1ae R08: 0000000000000001 R09: 0000000000000007
R10: 0000000000000200 R11: 000000000000b7f1 R12: ffff8880281dca00
R13: ffffc9000391f800 R14: 0000000000000202 R15: 0000000000000003
 rcu_lock_release include/linux/rcupdate.h:310 [inline]
 rcu_read_unlock include/linux/rcupdate.h:869 [inline]
 class_rcu_destructor include/linux/rcupdate.h:1181 [inline]
 unwind_next_frame+0x3c3/0x2090 arch/x86/kernel/unwind_orc.c:495
 __unwind_start+0x3d1/0x7f0 arch/x86/kernel/unwind_orc.c:787
 unwind_start arch/x86/include/asm/unwind.h:64 [inline]
 arch_stack_walk+0x73/0xf0 arch/x86/kernel/stacktrace.c:24
 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
 kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
 kasan_save_track+0x14/0x30 mm/kasan/common.c:78
 poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
 __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:415
 kmalloc_noprof include/linux/slab.h:950 [inline]
 kzalloc_noprof include/linux/slab.h:1188 [inline]
 simple_xattrs_alloc+0x40/0xd0 fs/xattr.c:1637
 class_simple_xattrs_constructor include/linux/xattr.h:165 [inline]
 shmem_initxattrs+0x7d/0x6c0 mm/shmem.c:4237
 security_inode_init_security+0x242/0x370 security/security.c:1370
 shmem_mknod+0x2ce/0x480 mm/shmem.c:3868
 shmem_mkdir+0x31/0x80 mm/shmem.c:3923
 vfs_mkdir+0x361/0x850 fs/namei.c:5261
 filename_mkdirat+0x48b/0x5e0 fs/namei.c:5294
 __do_sys_mkdir fs/namei.c:5321 [inline]
 __se_sys_mkdir fs/namei.c:5318 [inline]
 __x64_sys_mkdir+0x6b/0x90 fs/namei.c:5318
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7f4b514c37
RSP: 002b:00007fff9c441b48 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007fff9c443893 RCX: 00007f7f4b514c37
RDX: 0000000000000052 RSI: 00000000000001ed RDI: 00007fff9c441b50
RBP: 00007fff9c442c10 R08: 00007fff9c443890 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff9c443840
R13: 0000000000000000 R14: 00005583cbc4f7d4 R15: 0000000000000052
 </TASK>
task:udevd           state:R  running task     stack:27240 pid:6032  tgid:6032  ppid:4984   task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1295/0x67a0 kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0xdd/0x390 kernel/sched/core.c:7283
 schedule_hrtimeout_range_clock+0x2d0/0x310 kernel/time/sleep_timeout.c:207
 ep_poll fs/eventpoll.c:2030 [inline]
 do_epoll_wait+0xdc3/0x1020 fs/eventpoll.c:2464
 __do_sys_epoll_wait fs/eventpoll.c:2472 [inline]
 __se_sys_epoll_wait fs/eventpoll.c:2467 [inline]
 __x64_sys_epoll_wait+0x194/0x290 fs/eventpoll.c:2467
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7f4b4a7407
RSP: 002b:00007fff9c4445c0 EFLAGS: 00000202 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 00007f7f4bb68880 RCX: 00007f7f4b4a7407
RDX: 0000000000000004 RSI: 00007fff9c444650 RDI: 0000000000000004
RBP: 0000558407b272c0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000202 R12: 0000558407d918c0
R13: 00007fff9c444650 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
task:udevd           state:S stack:26896 pid:6033  tgid:6033  ppid:4984   task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1295/0x67a0 kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0xdd/0x390 kernel/sched/core.c:7283
 schedule_hrtimeout_range_clock+0x2d0/0x310 kernel/time/sleep_timeout.c:207
 ep_poll fs/eventpoll.c:2030 [inline]
 do_epoll_wait+0xdc3/0x1020 fs/eventpoll.c:2464
 __do_sys_epoll_wait fs/eventpoll.c:2472 [inline]
 __se_sys_epoll_wait fs/eventpoll.c:2467 [inline]
 __x64_sys_epoll_wait+0x194/0x290 fs/eventpoll.c:2467
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7f4b4a7407
RSP: 002b:00007fff9c4445c0 EFLAGS: 00000202 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 00007f7f4bb68880 RCX: 00007f7f4b4a7407
RDX: 0000000000000004 RSI: 00007fff9c444650 RDI: 0000000000000004
RBP: 0000558407b272c0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000202 R12: 0000558407d68340
R13: 00007fff9c444650 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
task:kworker/u9:6    state:R  running task     stack:27888 pid:6046  tgid:6046  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue:  0x0 (krxrpcd)
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1295/0x67a0 kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0xdd/0x390 kernel/sched/core.c:7283
 worker_thread+0x53b/0xe50 kernel/workqueue.c:3493
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
task:kworker/u9:7    state:I stack:28440 pid:6049  tgid:6049  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue:  0x0 (hci3)
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1295/0x67a0 kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0xdd/0x390 kernel/sched/core.c:7283
 worker_thread+0x53b/0xe50 kernel/workqueue.c:3493
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
task:dhcpcd          state:S stack:26800 pid:6244  tgid:6244  ppid:5279   task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1295/0x67a0 kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0xdd/0x390 kernel/sched/core.c:7283
 schedule_hrtimeout_range_clock+0x2d0/0x310 kernel/time/sleep_timeout.c:207



	

	



	Crashes (6):
		
		

			Time
			Kernel
			Commit
			Syzkaller
			Config
			Log
			Report
			Syz repro
			C repro
			VM info
			Assets (help?)
			Manager
			Title
		

		
		
		
		

			2026/05/18 16:01
			upstream
			5200f5f493f7
			55156e84
			.config
			console log
			report
			syz / log
			
			
			
				[disk image]
			
				[vmlinux]
			
				[kernel image]
			
			ci-upstream-kasan-gce-selinux-root
			INFO: rcu detected stall in sys_mkdir
		

		
		

			2025/01/21 04:27
			upstream
			100ceb4817a2
			6e87cfa2
			.config
			console log
			report
			syz / log
			
			
			
				[disk image]
			
				[vmlinux]
			
				[kernel image]
			
			ci-upstream-kasan-gce
			INFO: rcu detected stall in sys_mkdir
		

		
		

			2025/12/28 19:39
			upstream
			d26143bb38e2
			d6526ea3
			.config
			console log
			report
			
			
			info
			
				[disk image]
			
				[vmlinux]
			
				[kernel image]
			
			ci-upstream-kasan-gce-selinux-root
			INFO: rcu detected stall in sys_mkdir
		

		
		

			2025/08/20 01:00
			upstream
			b19a97d57c15
			79512909
			.config
			console log
			report
			
			
			info
			
				[disk image]
			
				[vmlinux]
			
				[kernel image]
			
			ci-upstream-kasan-gce-root
			INFO: rcu detected stall in sys_mkdir
		

		
		

			2025/05/12 22:40
			upstream
			82f2b0b97b36
			f6671af7
			.config
			console log
			report
			
			
			info
			
				[disk image]
			
				[vmlinux]
			
				[kernel image]
			
			ci-upstream-kasan-gce
			INFO: rcu detected stall in sys_mkdir
		

		
		

			2026/01/07 12:50
			linux-next
			f96074c6d01d
			d6526ea3
			.config
			console log
			report
			
			
			info
			
				[disk image]
			
				[vmlinux]
			
				[kernel image]
			
			ci-upstream-linux-next-kasan-gce-root
			INFO: rcu detected stall in sys_mkdir
		

		
		


* Struck through repros no longer work on HEAD.