[ 3327] 0 3327 18213 8748 27 4 0 1000 syz-executor.1 [ 3371] 0 3371 18279 10421 29 4 0 1000 syz-executor.3 [ 3399] 0 3399 18279 11459 30 4 0 1000 syz-executor.3 INFO: rcu_preempt detected stalls on CPUs/tasks: Tasks blocked on level-0 rcu_node (CPUs 0-1): P12176 (detected by 1, t=10503 jiffies, g=23929, c=23928, q=66) kworker/u4:4 R running task 26464 12176 2 0x80000000 Workqueue: events_unbound call_usermodehelper_exec_work Call Trace: preempt_schedule_common+0x4f/0xd0 kernel/sched/core.c:3578 ___preempt_schedule+0x16/0x18 __raw_spin_unlock include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock+0x3b/0x40 kernel/locking/spinlock.c:184 spin_unlock include/linux/spinlock.h:357 [inline] task_unlock include/linux/sched/task.h:136 [inline] dump_tasks mm/oom_kill.c:403 [inline] dump_header+0x7bb/0x848 mm/oom_kill.c:428 oom_kill_process.cold+0x10/0xde6 mm/oom_kill.c:861 out_of_memory mm/oom_kill.c:1084 [inline] out_of_memory+0x2d2/0xab0 mm/oom_kill.c:1023 __alloc_pages_may_oom mm/page_alloc.c:3415 [inline] __alloc_pages_slowpath mm/page_alloc.c:4112 [inline] __alloc_pages_nodemask+0x1988/0x2370 mm/page_alloc.c:4277 __alloc_pages include/linux/gfp.h:461 [inline] __alloc_pages_node include/linux/gfp.h:474 [inline] alloc_pages_node include/linux/gfp.h:488 [inline] alloc_thread_stack_node kernel/fork.c:243 [inline] dup_task_struct kernel/fork.c:529 [inline] copy_process.part.0+0x2c9/0x66c0 kernel/fork.c:1729 copy_process kernel/fork.c:1679 [inline] _do_fork+0x197/0xce0 kernel/fork.c:2220 kernel_thread+0x2f/0x40 kernel/fork.c:2284 call_usermodehelper_exec_sync kernel/umh.c:123 [inline] call_usermodehelper_exec_work+0xa7/0x230 kernel/umh.c:175 process_one_work+0x7f1/0x1580 kernel/workqueue.c:2134 worker_thread+0xdd/0xdf0 kernel/workqueue.c:2271 kthread+0x31f/0x430 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:404 kworker/u4:4 R running task 26464 12176 2 0x80000000 Workqueue: events_unbound call_usermodehelper_exec_work Call Trace: preempt_schedule_common+0x4f/0xd0 kernel/sched/core.c:3578 ___preempt_schedule+0x16/0x18 __raw_spin_unlock include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock+0x3b/0x40 kernel/locking/spinlock.c:184 spin_unlock include/linux/spinlock.h:357 [inline] task_unlock include/linux/sched/task.h:136 [inline] dump_tasks mm/oom_kill.c:403 [inline] dump_header+0x7bb/0x848 mm/oom_kill.c:428 oom_kill_process.cold+0x10/0xde6 mm/oom_kill.c:861 out_of_memory mm/oom_kill.c:1084 [inline] out_of_memory+0x2d2/0xab0 mm/oom_kill.c:1023 __alloc_pages_may_oom mm/page_alloc.c:3415 [inline] __alloc_pages_slowpath mm/page_alloc.c:4112 [inline] __alloc_pages_nodemask+0x1988/0x2370 mm/page_alloc.c:4277 __alloc_pages include/linux/gfp.h:461 [inline] __alloc_pages_node include/linux/gfp.h:474 [inline] alloc_pages_node include/linux/gfp.h:488 [inline] alloc_thread_stack_node kernel/fork.c:243 [inline] dup_task_struct kernel/fork.c:529 [inline] copy_process.part.0+0x2c9/0x66c0 kernel/fork.c:1729 copy_process kernel/fork.c:1679 [inline] _do_fork+0x197/0xce0 kernel/fork.c:2220 kernel_thread+0x2f/0x40 kernel/fork.c:2284 call_usermodehelper_exec_sync kernel/umh.c:123 [inline] call_usermodehelper_exec_work+0xa7/0x230 kernel/umh.c:175 process_one_work+0x7f1/0x1580 kernel/workqueue.c:2134 worker_thread+0xdd/0xdf0 kernel/workqueue.c:2271 kthread+0x31f/0x430 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:404 [ 3413] 0 3413 18279 12092 32 4 0 1000 syz-executor.4 [ 3428] 0 3428 18312 9143 27 4 0 1000 syz-executor.1 [ 3430] 0 3430 18279 9858 29 4 0 1000 syz-executor.2 [ 3466] 0 3466 18246 9738 28 4 0 1000 syz-executor.0 [ 3497] 0 3497 18279 10133 29 4 0 1000 syz-executor.0 [ 3509] 0 3509 18246 10190 28 4 0 1000 syz-executor.3 [ 3547] 0 3547 18279 8990 27 4 0 1000 syz-executor.2 [ 3598] 0 3598 18246 12462 32 4 0 1000 syz-executor.3 [ 3603] 0 3603 18246 8751 27 4 0 1000 syz-executor.1 [ 3717] 0 3717 18213 8746 25 4 0 1000 syz-executor.3 [ 3754] 0 3754 18246 9194 27 4 0 1000 syz-executor.2 [ 3784] 0 3784 18279 10787 30 4 0 1000 syz-executor.2 [ 3803] 0 3803 18279 9973 29 4 0 1000 syz-executor.2 [ 3927] 0 3927 18279 11718 31 4 0 1000 syz-executor.4 [ 3961] 0 3961 18246 8749 26 4 0 1000 syz-executor.3 [ 3975] 0 3975 18279 11436 31 4 0 1000 syz-executor.4 [ 4066] 0 4066 18312 11961 32 4 0 1000 syz-executor.4 [ 4114] 0 4114 18279 8888 27 4 0 1000 syz-executor.1 [ 4164] 0 4164 18279 8783 27 4 0 1000 syz-executor.1 [ 4209] 0 4209 18312 9064 27 4 0 1000 syz-executor.1 [ 4276] 0 4276 18246 9463 28 4 0 1000 syz-executor.4 [ 4288] 0 4288 18246 9290 27 4 0 1000 syz-executor.3 [ 4303] 0 4303 18279 11516 31 4 0 1000 syz-executor.4 [ 4308] 0 4308 18246 8750 27 4 0 1000 syz-executor.1 [ 4490] 0 4490 18279 10688 30 4 0 1000 syz-executor.0 [ 4516] 0 4516 18279 10086 29 4 0 1000 syz-executor.0 [ 4551] 0 4551 18279 10200 29 4 0 1000 syz-executor.0 [ 4566] 0 4566 18246 8935 26 4 0 1000 syz-executor.3 [ 4590] 0 4590 18246 9211 26 4 0 1000 syz-executor.3 [ 4664] 0 4664 18279 10530 30 4 0 1000 syz-executor.0 [ 4675] 0 4675 18279 8973 27 4 0 1000 syz-executor.2 [ 4679] 0 4679 18279 8834 26 4 0 1000 syz-executor.3 [ 4713] 0 4713 18279 11500 31 4 0 1000 syz-executor.0 [ 4717] 0 4717 18246 8795 26 4 0 1000 syz-executor.3 [ 4757] 0 4757 18246 9466 27 4 0 1000 syz-executor.3 [ 4799] 0 4799 18213 8861 25 4 0 1000 syz-executor.3 [ 4821] 0 4821 18246 9219 27 4 0 1000 syz-executor.1 [ 4855] 0 4855 18246 9283 28 4 0 1000 syz-executor.1 [ 4874] 0 4874 18246 10608 30 4 0 1000 syz-executor.2 [ 4958] 0 4958 18246 10071 28 4 0 1000 syz-executor.3 [ 5036] 0 5036 18279 10111 29 4 0 1000 syz-executor.2 [ 5050] 0 5050 18279 10249 29 4 0 1000 syz-executor.0 [ 5106] 0 5106 18279 10168 29 4 0 1000 syz-executor.0 [ 5111] 0 5111 18246 9123 25 4 0 1000 syz-executor.3 [ 5152] 0 5152 18246 8981 26 4 0 1000 syz-executor.3