rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2679 jiffies s: 19117 root: 0x2/. rcu: blocking rcu_node structures (internal RCU debug): Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 11114 Comm: syz.4.2370 Not tainted 6.11.0-rc5-syzkaller-00176-g20371ba12063 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:lockdep_recursion_finish kernel/locking/lockdep.c:466 [inline] RIP: 0010:lock_acquire kernel/locking/lockdep.c:5761 [inline] RIP: 0010:lock_acquire+0x1c1/0x560 kernel/locking/lockdep.c:5724 Code: 45 0f b6 c9 ff b4 24 00 01 00 00 41 57 8b 4c 24 2c 8b 74 24 28 e8 3f ad ff ff 48 c7 c7 40 da 4c 8b 48 83 c4 28 e8 ef 62 ac 09 ff ff ff ff 65 0f c1 05 7a ca 98 7e 83 f8 01 0f 85 ea 02 00 00 RSP: 0018:ffffc90000a18800 EFLAGS: 00000092 RAX: 0000000000000001 RBX: 1ffff92000143102 RCX: 0000000000000001 RDX: 0000000000000001 RSI: ffffffff8b4cda40 RDI: ffffffff8bb0ee40 RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff28cace1 R10: ffffffff9465670f R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000000 R14: ffffffff8dde60c8 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f891921d763 CR3: 000000000db7c000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: seqcount_lockdep_reader_access include/linux/seqlock.h:72 [inline] timekeeping_debug_get_ns+0x86/0x5b0 kernel/time/timekeeping.c:256 timekeeping_get_ns kernel/time/timekeeping.c:401 [inline] ktime_get+0xd9/0x1a0 kernel/time/timekeeping.c:850 clockevents_program_event+0x155/0x380 kernel/time/clockevents.c:326 tick_program_event+0xa9/0x140 kernel/time/tick-oneshot.c:44 hrtimer_interrupt+0x36d/0x800 kernel/time/hrtimer.c:1828 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x10f/0x450 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x43/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:in_softirq_really kernel/kcov.c:170 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:182 [inline] RIP: 0010:write_comp_data+0x1f/0x90 kernel/kcov.c:245 Code: 90 90 90 90 90 90 90 90 90 90 90 49 89 d2 49 89 f8 49 89 f1 65 48 8b 15 7f 1a 78 7e 65 8b 05 80 1a 78 7e a9 00 01 ff 00 74 1d c4 01 74 67 a9 00 00 0f 00 75 60 a9 00 00 f0 00 75 59 8b 82 1c RSP: 0018:ffffc90000a18b78 EFLAGS: 00000206 RAX: 0000000000000102 RBX: ffff88805ecf0ae0 RCX: ffffffff8924550a RDX: ffff8880285d3c00 RSI: 0000000000000000 RDI: 0000000000000001 RBP: ffff88805c624300 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88805ecf0b18 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 pie_calculate_probability+0x64a/0x850 net/sched/sch_pie.c:412 fq_pie_timer+0x215/0x5a0 net/sched/sch_fq_pie.c:398 call_timer_fn+0x1a0/0x610 kernel/time/timer.c:1792 expire_timers kernel/time/timer.c:1843 [inline] __run_timers+0x74b/0xaf0 kernel/time/timer.c:2417 __run_timer_base kernel/time/timer.c:2428 [inline] __run_timer_base kernel/time/timer.c:2421 [inline] run_timer_base+0x111/0x190 kernel/time/timer.c:2437 run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2447 handle_softirqs+0x216/0x8f0 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu kernel/softirq.c:637 [inline] irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:lock_acquire+0x1f2/0x560 kernel/locking/lockdep.c:5727 Code: c1 05 7a ca 98 7e 83 f8 01 0f 85 ea 02 00 00 9c 58 f6 c4 02 0f 85 d5 02 00 00 48 85 ed 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24 RSP: 0018:ffffc9000307f4d8 EFLAGS: 00000206 RAX: dffffc0000000000 RBX: 1ffff9200060fe9d RCX: 0000000000000001 RDX: 0000000000000001 RSI: ffffffff8b4cda40 RDI: ffffffff8bb0ee40 RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff28cace0 R10: ffffffff94656707 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffffffff8ddb9fe0 R15: 0000000000000000 rcu_lock_acquire include/linux/rcupdate.h:326 [inline] rcu_read_lock include/linux/rcupdate.h:838 [inline] page_ext_get+0x3a/0x310 mm/page_ext.c:525 page_table_check_clear.part.0+0x32/0x540 mm/page_table_check.c:74 page_table_check_clear mm/page_table_check.c:70 [inline] __page_table_check_pte_clear+0x328/0x580 mm/page_table_check.c:169 page_table_check_pte_clear include/linux/page_table_check.h:49 [inline] ptep_get_and_clear_full arch/x86/include/asm/pgtable.h:1284 [inline] get_and_clear_full_ptes include/linux/pgtable.h:678 [inline] zap_present_folio_ptes mm/memory.c:1493 [inline] zap_present_ptes mm/memory.c:1576 [inline] zap_pte_range mm/memory.c:1618 [inline] zap_pmd_range mm/memory.c:1736 [inline] zap_pud_range mm/memory.c:1765 [inline] zap_p4d_range mm/memory.c:1786 [inline] unmap_page_range+0x21ac/0x3c10 mm/memory.c:1807 unmap_single_vma+0x194/0x2b0 mm/memory.c:1853 unmap_vmas+0x22f/0x490 mm/memory.c:1897 exit_mmap+0x1b8/0xb20 mm/mmap.c:3412 __mmput+0x12a/0x480 kernel/fork.c:1345 mmput+0x62/0x70 kernel/fork.c:1367 exit_mm kernel/exit.c:571 [inline] do_exit+0x9bf/0x2bb0 kernel/exit.c:869 do_group_exit+0xd3/0x2a0 kernel/exit.c:1031 get_signal+0x25fb/0x2770 kernel/signal.c:2917 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] irqentry_exit_to_user_mode+0x13f/0x280 kernel/entry/common.c:231 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0033:0x7fa4dc84da54 Code: Unable to access opcode bytes at 0x7fa4dc84da2a. RSP: 002b:00007ffe5d8c2e30 EFLAGS: 00010246 RAX: 00000000003ffdf0 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000001b30b20000 RSI: 0000000000400000 RDI: 00007fa4dca68bd0 RBP: 00007ffe5d8c308c R08: 0000000000000004 R09: 0000000000040000 R10: 0000000000000011 R11: 0000000000000293 R12: 0000000000000032 R13: 0000000000098b5a R14: 00000000000987e0 R15: 00007ffe5d8c30e0