rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: (detected by 0, t=10502 jiffies, g=6441, q=73) rcu: All QSes seen, last rcu_preempt kthread activity 10501 (4294953478-4294942977), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor.0 R running task 28272 8142 8117 0x0000400a Call Trace: sched_show_task+0x40f/0x560 kernel/sched/core.c:5954 print_other_cpu_stall kernel/rcu/tree_stall.h:410 [inline] check_cpu_stall kernel/rcu/tree_stall.h:538 [inline] rcu_pending kernel/rcu/tree.c:2827 [inline] rcu_sched_clock_irq+0x1861/0x1ad0 kernel/rcu/tree.c:2271 update_process_times+0x12d/0x180 kernel/time/timer.c:1726 tick_sched_handle kernel/time/tick-sched.c:167 [inline] tick_sched_timer+0x263/0x420 kernel/time/tick-sched.c:1310 __run_hrtimer kernel/time/hrtimer.c:1514 [inline] __hrtimer_run_queues+0x403/0x840 kernel/time/hrtimer.c:1576 hrtimer_interrupt+0x38c/0xda0 kernel/time/hrtimer.c:1638 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline] smp_apic_timer_interrupt+0x109/0x280 arch/x86/kernel/apic/apic.c:1135 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:mod_memcg_page_state+0x2b/0x190 include/linux/memcontrol.h:653 Code: 48 89 e5 41 57 41 56 41 54 53 41 89 f6 48 89 fb e8 da 28 2e 00 48 83 c3 38 48 89 d8 48 c1 e8 03 49 bc 00 00 00 00 00 fc ff df <42> 80 3c 20 00 74 08 48 89 df e8 b6 9f 69 00 48 8b 1b 48 85 db 0f RSP: 0018:ffffc900024175c8 EFLAGS: 00000a06 ORIG_RAX: ffffffffffffff13 RAX: 1ffffd40004ff527 RBX: ffffea00027fa938 RCX: 0000000000040000 RDX: ffffc90001e59000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: ffffc900024175e8 R08: 000000000003a768 R09: ffffed101511df4f R10: ffffed101511df4f R11: 0000000000000000 R12: dffffc0000000000 R13: dffffc0000000000 R14: 00000000fffffffc R15: ffff8880a88efa68 free_thread_stack+0x168/0x590 kernel/fork.c:280 release_task_stack kernel/fork.c:440 [inline] put_task_stack+0xa3/0x130 kernel/fork.c:451 finish_task_switch+0x3f1/0x550 kernel/sched/core.c:3256 context_switch kernel/sched/core.c:3388 [inline] __schedule+0x9a8/0xcc0 kernel/sched/core.c:4081 preempt_schedule_common kernel/sched/core.c:4236 [inline] __cond_resched_lock+0x11b/0x1d0 kernel/sched/core.c:5649 __purge_vmap_area_lazy+0x1a05/0x1b00 mm/vmalloc.c:1319 _vm_unmap_aliases+0x43a/0x4c0 mm/vmalloc.c:1730 vm_unmap_aliases+0x19/0x20 mm/vmalloc.c:1753 change_page_attr_set_clr+0x267/0x650 arch/x86/mm/pageattr.c:1709 change_page_attr_clear arch/x86/mm/pageattr.c:1766 [inline] set_memory_ro+0x66/0x90 arch/x86/mm/pageattr.c:1899 bpf_jit_binary_lock_ro include/linux/filter.h:786 [inline] bpf_int_jit_compile+0x8bab/0x9090 arch/x86/net/bpf_jit_comp.c:1659 bpf_prog_select_runtime+0x787/0xa80 kernel/bpf/core.c:1801 bpf_migrate_filter net/core/filter.c:1275 [inline] bpf_prepare_filter+0xfd9/0x1270 net/core/filter.c:1323 __get_filter+0x2f0/0x410 net/core/filter.c:1492 sk_attach_filter+0x23/0x140 net/core/filter.c:1507 sock_setsockopt+0x1ce3/0x2910 net/core/sock.c:999 __sys_setsockopt+0x4de/0x720 net/socket.c:2113 __do_sys_setsockopt net/socket.c:2133 [inline] __se_sys_setsockopt net/socket.c:2130 [inline] __x64_sys_setsockopt+0xbf/0xd0 net/socket.c:2130 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45a679 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ff2334cec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045a679 RDX: 000000000000001a RSI: 0000000000000001 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000010 R09: 0000000000000000 R10: 0000000020b86000 R11: 0000000000000246 R12: 00007ff2334cf6d4 R13: 00000000004c9ada R14: 00000000004e1b58 R15: 00000000ffffffff rcu: rcu_preempt kthread starved for 10535 jiffies! g6441 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 29032 10 2 0x80004000 Call Trace: context_switch kernel/sched/core.c:3385 [inline] __schedule+0x9a0/0xcc0 kernel/sched/core.c:4081 schedule+0x181/0x210 kernel/sched/core.c:4155 schedule_timeout+0x14f/0x240 kernel/time/timer.c:1895 rcu_gp_fqs_loop kernel/rcu/tree.c:1661 [inline] rcu_gp_kthread+0xed8/0x1770 kernel/rcu/tree.c:1821 kthread+0x332/0x350 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352