rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: (detected by 0, t=10502 jiffies, g=126749, q=120) rcu: All QSes seen, last rcu_preempt kthread activity 8228 (4295028586-4295020358), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor.0 R running task 27784 7877 9936 0x2002400c Call Trace: sched_show_task kernel/sched/core.c:5954 [inline] sched_show_task.cold+0x2ee/0x35d kernel/sched/core.c:5929 print_other_cpu_stall kernel/rcu/tree_stall.h:430 [inline] check_cpu_stall kernel/rcu/tree_stall.h:558 [inline] rcu_pending kernel/rcu/tree.c:3030 [inline] rcu_sched_clock_irq.cold+0xb23/0xc37 kernel/rcu/tree.c:2276 update_process_times+0x2d/0x70 kernel/time/timer.c:1726 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:171 tick_sched_timer+0x53/0x140 kernel/time/tick-sched.c:1314 __run_hrtimer kernel/time/hrtimer.c:1517 [inline] __hrtimer_run_queues+0x364/0xe40 kernel/time/hrtimer.c:1579 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1641 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline] smp_apic_timer_interrupt+0x160/0x610 arch/x86/kernel/apic/apic.c:1135 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:rcu_dynticks_curr_cpu_in_eqs+0x2e/0xb0 kernel/rcu/tree.c:299 Code: 41 54 53 48 c7 c3 00 83 03 00 48 83 ec 08 e8 d9 ca 3f 02 48 ba 00 00 00 00 00 fc ff df 89 c0 48 8d 3c c5 60 e1 7a 89 48 89 f9 <48> c1 e9 03 80 3c 11 00 75 63 48 03 1c c5 60 e1 7a 89 be 04 00 00 RSP: 0018:ffffc90000007c48 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 0000000000038300 RCX: ffffffff897ae160 RDX: dffffc0000000000 RSI: ffffffff83a1cb43 RDI: ffffffff897ae160 RBP: ffffc90000007c60 R08: ffff888037e22340 R09: fffffbfff1547589 R10: fffffbfff1547588 R11: ffffffff8aa3ac47 R12: 0000000000000101 R13: ffffc90000007db0 R14: 0000000000000000 R15: dffffc0000000000 rcu_is_watching+0x10/0x30 kernel/rcu/tree.c:919 rcu_read_lock_held_common+0xb4/0x130 kernel/rcu/update.c:104 rcu_read_lock_sched_held+0x5b/0xd0 kernel/rcu/update.c:119 trace_timer_expire_exit include/trace/events/timer.h:125 [inline] call_timer_fn+0x698/0x780 kernel/time/timer.c:1405 expire_timers kernel/time/timer.c:1449 [inline] __run_timers kernel/time/timer.c:1773 [inline] __run_timers kernel/time/timer.c:1740 [inline] run_timer_softirq+0x6c3/0x1790 kernel/time/timer.c:1786 __do_softirq+0x262/0x98c kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x19b/0x1e0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1137 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:752 [inline] RIP: 0010:lock_acquire+0x20b/0x410 kernel/locking/lockdep.c:4487 Code: 94 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 d3 01 00 00 48 83 3d a9 93 58 08 00 0f 84 53 01 00 00 48 8b 7d c8 57 9d <0f> 1f 44 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 65 8b RSP: 0018:ffffc900015d7a70 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13675af RBX: ffff888037e22340 RCX: ffffffff815acd32 RDX: dffffc0000000000 RSI: 0000000000000008 RDI: 0000000000000286 RBP: ffffc900015d7ab8 R08: 00000000000072d7 R09: fffffbfff169ed67 R10: ffff888037e22c00 R11: ffff888037e22340 R12: ffff8880595cd5d0 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] browse_rb mm/mmap.c:353 [inline] validate_mm+0x32f/0x620 mm/mmap.c:420 vma_link+0x114/0x170 mm/mmap.c:660 mmap_region+0x1297/0x1760 mm/mmap.c:1801 do_mmap+0x837/0x1150 mm/mmap.c:1549 do_mmap_pgoff include/linux/mm.h:2334 [inline] vm_mmap_pgoff+0x1c5/0x230 mm/util.c:506 ksys_mmap_pgoff+0xf7/0x630 mm/mmap.c:1601 __do_sys_mmap_pgoff mm/mmap.c:1612 [inline] __se_sys_mmap_pgoff mm/mmap.c:1608 [inline] __ia32_sys_mmap_pgoff+0xdd/0x1a0 mm/mmap.c:1608 do_syscall_32_irqs_on arch/x86/entry/common.c:337 [inline] do_fast_syscall_32+0x27b/0xe16 arch/x86/entry/common.c:408 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7f47e39 Code: 1d 00 00 00 89 d3 5b 5e 5d c3 8b 04 24 c3 8b 1c 24 c3 8b 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f5d420cc EFLAGS: 00000296 ORIG_RAX: 00000000000000c0 RAX: ffffffffffffffda RBX: 0000000020000000 RCX: 000000000000f000 RDX: 0000000000000002 RSI: 000000000001b071 RDI: 00000000ffffffff RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000