rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-....: (1 GPs behind) idle=2cb/1/0x4000000000000000 softirq=27514/27515 fqs=17 (detected by 1, t=10506 jiffies, g=39009, q=16931) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4527 Comm: kworker/0:15 Not tainted 5.15.170-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: events_power_efficient gc_worker RIP: 0010:check_preemption_disabled+0x19/0x110 lib/smp_processor_id.c:14 Code: cc 48 c7 c7 20 04 d9 8a 48 c7 c6 60 04 d9 8a eb 00 41 57 41 56 41 54 53 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 44 24 08 <65> 8b 1d 98 e2 cd 75 65 8b 05 01 3d ce 75 a9 ff ff ff 7f 74 22 65 RSP: 0018:ffffc90000007b48 EFLAGS: 00000086 RAX: 2915734c0268f100 RBX: 0000000000000046 RCX: ffffffff8162e388 RDX: 0000000000000000 RSI: ffffffff8a8b3880 RDI: ffffffff8ad90480 RBP: ffffc90000007cb0 R08: dffffc0000000000 R09: fffffbfff1bd2cce R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000000f7c R13: ffffffff8881a685 R14: ffffc90000007c30 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0b46caad00 CR3: 00000000492c0000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lockdep_recursion_inc kernel/locking/lockdep.c:431 [inline] lock_release+0x181/0x9a0 kernel/locking/lockdep.c:5642 rcu_read_unlock include/linux/rcupdate.h:772 [inline] advance_sched+0x7d4/0x940 net/sched/sch_taprio.c:771 __run_hrtimer kernel/time/hrtimer.c:1688 [inline] __hrtimer_run_queues+0x598/0xcf0 kernel/time/hrtimer.c:1752 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1814 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline] __sysvec_apic_timer_interrupt+0x13b/0x4b0 arch/x86/kernel/apic/apic.c:1114 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline] sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676 RIP: 0010:lock_release+0x62d/0x9a0 kernel/locking/lockdep.c:5647 Code: 3c 3b 00 74 08 4c 89 f7 e8 a0 55 67 00 f6 84 24 91 00 00 00 02 75 6f 41 f7 c5 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 27 00 00 00 00 4b c7 44 27 08 00 00 00 00 65 48 8b 04 25 RSP: 0018:ffffc900036779c0 EFLAGS: 00000206 RAX: 0000000000000001 RBX: 1ffff920006cef4a RCX: ffffc90003677a03 RDX: 0000000000000002 RSI: ffffffff8a8b3d20 RDI: ffffffff8ad90480 RBP: ffffc90003677af0 R08: dffffc0000000000 R09: fffffbfff1bd2cce R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920006cef44 R13: 0000000000000246 R14: ffffc90003677a50 R15: dffffc0000000000 rcu_read_unlock include/linux/rcupdate.h:772 [inline] gc_worker+0xd6a/0x14b0 net/netfilter/nf_conntrack_core.c:1543 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 rcu: rcu_preempt kthread starved for 2752 jiffies! g39009 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:26144 pid: 15 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5027 [inline] __schedule+0x12c4/0x45b0 kernel/sched/core.c:6373 schedule+0x11b/0x1f0 kernel/sched/core.c:6456 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1914 rcu_gp_fqs_loop+0x2bf/0x1080 kernel/rcu/tree.c:1972 rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2145 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 rcu: Stack dump where RCU GP kthread last ran: NMI backtrace for cpu 1 CPU: 1 PID: 10071 Comm: dhcpcd Not tainted 5.15.170-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline] rcu_check_gp_kthread_starvation+0x1d2/0x240 kernel/rcu/tree_stall.h:487 print_other_cpu_stall+0x137a/0x14d0 kernel/rcu/tree_stall.h:592 check_cpu_stall kernel/rcu/tree_stall.h:745 [inline] rcu_pending kernel/rcu/tree.c:3932 [inline] rcu_sched_clock_irq+0xa38/0x1150 kernel/rcu/tree.c:2619 update_process_times+0x196/0x200 kernel/time/timer.c:1818 tick_sched_handle kernel/time/tick-sched.c:254 [inline] tick_sched_timer+0x386/0x550 kernel/time/tick-sched.c:1473 __run_hrtimer kernel/time/hrtimer.c:1688 [inline] __hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1752 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1814 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline] __sysvec_apic_timer_interrupt+0x13b/0x4b0 arch/x86/kernel/apic/apic.c:1114 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline] sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676 RIP: 0010:csd_lock_wait kernel/smp.c:440 [inline] RIP: 0010:smp_call_function_many_cond+0xa93/0xd90 kernel/smp.c:969 Code: 04 03 84 c0 0f 85 84 00 00 00 45 8b 7d 00 44 89 fe 83 e6 01 31 ff e8 5c d5 0b 00 41 83 e7 01 75 07 e8 f1 d1 0b 00 eb 41 f3 90 <48> b8 00 00 00 00 00 fc ff df 0f b6 04 03 84 c0 75 11 41 f7 45 00 RSP: 0018:ffffc900041670a0 EFLAGS: 00000293 RAX: ffffffff8174a1f4 RBX: 1ffff11017208541 RCX: ffff88804fb73b80 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc900041671d0 R08: ffffffff8174a1c4 R09: fffffbfff20ec621 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: ffff8880b9042a08 R14: ffff8880b913b380 R15: 0000000000000001 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1135 on_each_cpu include/linux/smp.h:71 [inline] flush_tlb_kernel_range+0x197/0x230 arch/x86/mm/tlb.c:1033 __purge_vmap_area_lazy+0x15ae/0x1740 mm/vmalloc.c:1704 _vm_unmap_aliases+0x453/0x4e0 mm/vmalloc.c:2107 change_page_attr_set_clr+0x308/0x1050 arch/x86/mm/pat/set_memory.c:1740 change_page_attr_clear arch/x86/mm/pat/set_memory.c:1797 [inline] set_memory_ro+0xa1/0xe0 arch/x86/mm/pat/set_memory.c:1943 bpf_jit_binary_lock_ro include/linux/filter.h:892 [inline] bpf_int_jit_compile+0xbf36/0xc6c0 arch/x86/net/bpf_jit_comp.c:2422 bpf_prog_select_runtime+0x701/0x9f0 kernel/bpf/core.c:1930 bpf_migrate_filter net/core/filter.c:1299 [inline] bpf_prepare_filter+0x10d0/0x13d0 net/core/filter.c:1347 sk_attach_filter+0x1e/0x130 net/core/filter.c:1531 sock_setsockopt+0x19ff/0x2f10 net/core/sock.c:1167 __sys_setsockopt+0x5dd/0x990 net/socket.c:2199 __do_sys_setsockopt net/socket.c:2214 [inline] __se_sys_setsockopt net/socket.c:2211 [inline] __x64_sys_setsockopt+0xb1/0xc0 net/socket.c:2211 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f8db9a8bb7a Code: d8 64 89 02 48 83 c8 ff 89 ef 48 89 44 24 08 e8 eb 54 f9 ff 48 8b 44 24 08 48 83 c4 30 5d c3 c3 49 89 ca b8 36 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 10 48 8b 15 7f c2 0c 00 f7 d8 64 89 02 48 83 RSP: 002b:00007ffde47fa388 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000565043038ca3 RCX: 00007f8db9a8bb7a RDX: 000000000000001a RSI: 0000000000000001 RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000010 R09: 0000000000400000 R10: 00007ffde47fa3a8 R11: 0000000000000246 R12: 000056505ec357c0 R13: 000056505ec50868 R14: 00007ffde481ae2c R15: 000056505ec50834