rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=aa8c/1/0x4000000000000000 softirq=10335/10335 fqs=0
	(detected by 1, t=10506 jiffies, g=12409, q=307 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4393 Comm: syz.3.188 Not tainted 6.1.103-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:__netif_schedule+0x1/0x310 net/core/dev.c:3110
Code: 99 8e 80 e1 07 80 c1 03 38 c1 0f 8c b8 fd ff ff 48 c7 c7 b8 c6 99 8e e8 2d fc 47 f9 e9 a7 fd ff ff e8 c3 fa 0a 02 0f 1f 00 55 <48> 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec a0 00 00
RSP: 0018:ffffc90000007cb0 EFLAGS: 00000046
RAX: ffffffff88ce8f62 RBX: ffffffff88ce8f20 RCX: ffff88807e9a5940
RDX: 0000000080010002 RSI: ffffffff8b5d5dc0 RDI: ffff888056538000
RBP: 0000000000000001 R08: ffffffff88ce8f50 R09: fffffbfff20e7245
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888056538000
R13: ffff888056538360 R14: dffffc0000000000 R15: 17f0aee4e4000000
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc8270fff8 CR3: 0000000077389000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 advance_sched+0x772/0x970 net/sched/sch_taprio.c:754
 __run_hrtimer kernel/time/hrtimer.c:1686 [inline]
 __hrtimer_run_queues+0x5e5/0xe50 kernel/time/hrtimer.c:1750
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x7c/0x80 kernel/kcov.c:306
Code: 8d 42 28 4c 39 c8 77 22 89 f8 89 f6 49 ff c2 4c 89 11 48 c7 44 0a 08 05 00 00 00 48 89 44 0a 10 48 89 74 0a 18 4c 89 44 0a 20 <c3> 0f 1f 00 4c 8b 04 24 65 48 8b 0d b4 ca 77 7e 65 8b 05 b5 ca 77
RSP: 0018:ffffc9001768f2a0 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff88807e9a5940
RDX: ffff88807e9a5940 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffffff81ece6c2 R09: fffffbfff20e7245
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 00000000000720cc R14: ffffffff81ece446 R15: ffff88813fff91c0
 rcu_read_unlock_sched include/linux/rcupdate.h:902 [inline]
 pfn_valid+0x372/0x440 include/linux/mmzone.h:1867
 page_table_check_clear+0x1e/0x6d0 mm/page_table_check.c:67
 zap_pte_range mm/memory.c:1435 [inline]
 zap_pmd_range mm/memory.c:1574 [inline]
 zap_pud_range mm/memory.c:1603 [inline]
 zap_p4d_range mm/memory.c:1624 [inline]
 unmap_page_range+0x1b4a/0x2740 mm/memory.c:1645
 unmap_vmas+0x48b/0x640 mm/memory.c:1730
 exit_mmap+0x252/0x9f0 mm/mmap.c:3227
 __mmput+0x115/0x3c0 kernel/fork.c:1199
 exit_mm+0x226/0x300 kernel/exit.c:565
 do_exit+0x9f6/0x26a0 kernel/exit.c:858
 do_group_exit+0x202/0x2b0 kernel/exit.c:1021
 get_signal+0x16f7/0x17d0 kernel/signal.c:2870
 arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fe1d41779f9
Code: Unable to access opcode bytes at 0x7fe1d41779cf.
RSP: 002b:00007fe1d503d0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fe1d4305f88 RCX: 00007fe1d41779f9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fe1d4305f88
RBP: 00007fe1d4305f80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe1d4305f8c
R13: 0000000000000000 R14: 00007ffdc9cb7010 R15: 00007ffdc9cb70f8
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10505 jiffies! g12409 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=7423
rcu: rcu_preempt kthread starved for 10506 jiffies! g12409 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:26712 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5241 [inline]
 __schedule+0x143f/0x4570 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1965
 rcu_gp_fqs_loop+0x2d2/0x1150 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0xa3/0x3b0 kernel/rcu/tree.c:1905
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4393 Comm: syz.3.188 Not tainted 6.1.103-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:__lock_acquire+0x12a5/0x1f80 kernel/locking/lockdep.c:5053
Code: 24 60 74 12 48 89 df e8 09 92 77 00 48 ba 00 00 00 00 00 fc ff df 48 89 2b 48 8b 44 24 28 0f b6 04 10 84 c0 0f 85 61 08 00 00 <41> 8b 04 24 ff c0 41 89 04 24 83 f8 30 0f 83 c4 02 00 00 be 01 00
RSP: 0018:ffffc90000007a60 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff88807e9a6410 RCX: ffffffff816b2c12
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffffffff90739328
RBP: 7f842808c85a20d1 R08: dffffc0000000000 R09: fffffbfff20e7266
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88807e9a6418
R13: ffff88807e9a5940 R14: 0000000000000001 R15: 1ffff1100fd34c97
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc8270fff8 CR3: 0000000077389000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:351 [inline]
 advance_sched+0x47/0x970 net/sched/sch_taprio.c:700
 __run_hrtimer kernel/time/hrtimer.c:1686 [inline]
 __hrtimer_run_queues+0x5e5/0xe50 kernel/time/hrtimer.c:1750
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x7c/0x80 kernel/kcov.c:306
Code: 8d 42 28 4c 39 c8 77 22 89 f8 89 f6 49 ff c2 4c 89 11 48 c7 44 0a 08 05 00 00 00 48 89 44 0a 10 48 89 74 0a 18 4c 89 44 0a 20 <c3> 0f 1f 00 4c 8b 04 24 65 48 8b 0d b4 ca 77 7e 65 8b 05 b5 ca 77
RSP: 0018:ffffc9001768f2a0 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff88807e9a5940
RDX: ffff88807e9a5940 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffffff81ece6c2 R09: fffffbfff20e7245
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 00000000000720cc R14: ffffffff81ece446 R15: ffff88813fff91c0
 rcu_read_unlock_sched include/linux/rcupdate.h:902 [inline]
 pfn_valid+0x372/0x440 include/linux/mmzone.h:1867
 page_table_check_clear+0x1e/0x6d0 mm/page_table_check.c:67
 zap_pte_range mm/memory.c:1435 [inline]
 zap_pmd_range mm/memory.c:1574 [inline]
 zap_pud_range mm/memory.c:1603 [inline]
 zap_p4d_range mm/memory.c:1624 [inline]
 unmap_page_range+0x1b4a/0x2740 mm/memory.c:1645
 unmap_vmas+0x48b/0x640 mm/memory.c:1730
 exit_mmap+0x252/0x9f0 mm/mmap.c:3227
 __mmput+0x115/0x3c0 kernel/fork.c:1199
 exit_mm+0x226/0x300 kernel/exit.c:565
 do_exit+0x9f6/0x26a0 kernel/exit.c:858
 do_group_exit+0x202/0x2b0 kernel/exit.c:1021
 get_signal+0x16f7/0x17d0 kernel/signal.c:2870
 arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fe1d41779f9
Code: Unable to access opcode bytes at 0x7fe1d41779cf.
RSP: 002b:00007fe1d503d0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fe1d4305f88 RCX: 00007fe1d41779f9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fe1d4305f88
RBP: 00007fe1d4305f80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe1d4305f8c
R13: 0000000000000000 R14: 00007ffdc9cb7010 R15: 00007ffdc9cb70f8
 </TASK>