rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=98dc/1/0x4000000000000000 softirq=129780/129780 fqs=6
rcu: 	(detected by 1, t=10503 jiffies, g=241149, q=130 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 22733 Comm: syz-executor.3 Not tainted 6.8.0-rc3-syzkaller-00010-g6d280f4d760e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:kasan_check_range+0x12/0x1a0 mm/kasan/generic.c:188
Code: 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 48 85 f6 0f 84 50 01 00 00 48 89 f8 41 54 <44> 0f b6 c2 48 01 f0 55 53 0f 82 c6 00 00 00 48 b8 ff ff ff ff ff
RSP: 0018:ffffc90000007ce8 EFLAGS: 00000002
RAX: ffffc90000007d20 RBX: ffff8880229e52e8 RCX: ffffffff816b23de
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc90000007d20
RBP: 1ffff92000000fa0 R08: 0000000000000001 R09: ffffed100453ca5d
R10: ffff8880229e52eb R11: 0000000000000003 R12: ffff8880229e52f0
R13: ffff8880229e52f8 R14: ffff8880229e5340 R15: ffffffff88db1e50
FS:  0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31821000 CR3: 0000000064f08000 CR4: 00000000003506f0
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
 atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1295 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:111 [inline]
 do_raw_spin_lock+0x12e/0x2c0 kernel/locking/spinlock_debug.c:116
 spin_lock include/linux/spinlock.h:351 [inline]
 advance_sched+0xd8/0xc60 net/sched/sch_taprio.c:935
 __run_hrtimer kernel/time/hrtimer.c:1688 [inline]
 __hrtimer_run_queues+0x203/0xc30 kernel/time/hrtimer.c:1752
 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1814
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1065 [inline]
 __sysvec_apic_timer_interrupt+0x108/0x400 arch/x86/kernel/apic/apic.c:1082
 sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1076
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:ptep_get include/linux/pgtable.h:291 [inline]
RIP: 0010:zap_pte_range mm/memory.c:1436 [inline]
RIP: 0010:zap_pmd_range mm/memory.c:1597 [inline]
RIP: 0010:zap_pud_range mm/memory.c:1626 [inline]
RIP: 0010:zap_p4d_range mm/memory.c:1647 [inline]
RIP: 0010:unmap_page_range+0xac7/0x2af0 mm/memory.c:1668
Code: 4c 8b 7c 24 20 48 83 04 24 08 48 89 de 4c 89 ff e8 ae 25 bd ff 48 8d 83 00 10 00 00 49 39 df 0f 84 19 0e 00 00 48 89 44 24 08 <e8> 44 2b bd ff 48 8b 04 24 48 c1 e8 03 42 80 3c 30 00 0f 85 a6 17
RSP: 0018:ffffc9000446f6d0 EFLAGS: 00000206
RAX: 0000001b31938000 RBX: 0000001b31937000 RCX: ffffffff81ce1a22
RDX: ffff8880473f5940 RSI: 0000001b31a00000 RDI: 0000000000000006
RBP: 0000000000000000 R08: 0000000000000006 R09: 0000001b31a00000
R10: 0000001b31937000 R11: 0000000000000003 R12: ffffea0001afad80
R13: ffffea0001afad80 R14: dffffc0000000000 R15: 0000001b31a00000
 unmap_single_vma+0x194/0x2b0 mm/memory.c:1714
 unmap_vmas+0x22f/0x490 mm/memory.c:1758
 exit_mmap+0x1c1/0xb50 mm/mmap.c:3279
 __mmput+0x12a/0x4d0 kernel/fork.c:1343
 mmput+0x62/0x70 kernel/fork.c:1365
 exit_mm kernel/exit.c:569 [inline]
 do_exit+0x9a5/0x2ad0 kernel/exit.c:858
 do_group_exit+0xd4/0x2a0 kernel/exit.c:1020
 get_signal+0x23b9/0x2790 kernel/signal.c:2893
 arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:105 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
 syscall_exit_to_user_mode+0x156/0x2b0 kernel/entry/common.c:212
 do_syscall_64+0xe5/0x270 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f852327dda9
Code: Unable to access opcode bytes at 0x7f852327dd7f.
RSP: 002b:00007f85225ff178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007f85233abf88 RCX: 00007f852327dda9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f85233abf8c
RBP: 00007f85233abf80 R08: 0000000000000001 R09: 00007f85225ff6c0
R10: ffffffffffffffff R11: 0000000000000246 R12: 00007f85233abf8c
R13: 000000000000000b R14: 00007ffd77674400 R15: 00007ffd776744e8
 </TASK>
rcu: rcu_preempt kthread starved for 10475 jiffies! g241149 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:27712 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5400 [inline]
 __schedule+0xf12/0x5c60 kernel/sched/core.c:6727
 __schedule_loop kernel/sched/core.c:6802 [inline]
 schedule+0xe9/0x280 kernel/sched/core.c:6817
 schedule_timeout+0x137/0x2a0 kernel/time/timer.c:2183
 rcu_gp_fqs_loop+0x1ec/0xb20 kernel/rcu/tree.c:1663
 rcu_gp_kthread+0x24b/0x380 kernel/rcu/tree.c:1862
 kthread+0x2c6/0x3b0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 24825 Comm: kworker/u4:9 Not tainted 6.8.0-rc3-syzkaller-00010-g6d280f4d760e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:200
Code: be b0 01 00 00 e8 a0 ff ff ff 31 c0 c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 65 48 8b 14 25 40 c2 03 00 65 8b 05 b4 7c 78 7e a9 00
RSP: 0018:ffffc90012e3f928 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffff8880b9444a40 RCX: ffffffff817f3f9b
RDX: ffff8880635f1dc0 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000006 R12: ffffed1017288949
R13: 0000000000000001 R14: ffff8880b9444a48 R15: ffff8880b953de40
FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7bd5cd5690 CR3: 000000000d57a000 CR4: 00000000003506f0
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 rep_nop arch/x86/include/asm/vdso/processor.h:13 [inline]
 cpu_relax arch/x86/include/asm/vdso/processor.h:18 [inline]
 csd_lock_wait kernel/smp.c:311 [inline]
 smp_call_function_many_cond+0x4e5/0x1570 kernel/smp.c:855
 on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1023
 on_each_cpu include/linux/smp.h:71 [inline]
 text_poke_sync arch/x86/kernel/alternative.c:2087 [inline]
 text_poke_bp_batch+0x22b/0x760 arch/x86/kernel/alternative.c:2297
 text_poke_flush arch/x86/kernel/alternative.c:2488 [inline]
 text_poke_flush arch/x86/kernel/alternative.c:2485 [inline]
 text_poke_finish+0x30/0x40 arch/x86/kernel/alternative.c:2495
 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
 jump_label_update+0x1d7/0x400 kernel/jump_label.c:829
 static_key_enable_cpuslocked+0x1b7/0x270 kernel/jump_label.c:205
 static_key_enable+0x1a/0x20 kernel/jump_label.c:218
 toggle_allocation_gate mm/kfence/core.c:826 [inline]
 toggle_allocation_gate+0xf8/0x250 mm/kfence/core.c:818
 process_one_work+0x889/0x15e0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x12a0 kernel/workqueue.c:2787
 kthread+0x2c6/0x3b0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242
 </TASK>