rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: (detected by 0, t=10502 jiffies, g=6533, q=357) rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294954109-4294943606), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor.1 R running task 24952 8419 8418 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:1517 [inline] __hrtimer_run_queues+0x403/0x840 kernel/time/hrtimer.c:1579 hrtimer_interrupt+0x38c/0xda0 kernel/time/hrtimer.c:1641 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+0x8/0x190 include/linux/memcontrol.h:652 Code: eb 0c e8 eb 27 2e 00 eb 05 e8 e4 27 2e 00 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 <41> 54 53 41 89 f6 48 89 fb e8 ba 27 2e 00 48 83 c3 38 48 89 d8 48 RSP: 0018:ffffc900021673b8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 1ffff11014da54c1 RBX: ffff8880a6d2a608 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 00000000fffffffc RDI: ffffea00025162c0 RBP: ffffc900021673c8 R08: 000000000003a728 R09: fffffbfff124248a R10: fffffbfff124248a R11: 0000000000000000 R12: ffff8880a708ed20 R13: dffffc0000000000 R14: 1ffff11014e11da4 R15: ffff88809a5c79f8 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_irq+0xc1/0x140 kernel/sched/core.c:4338 retint_kernel+0x1b/0x2b RIP: 0010:preempt_count_add+0x6/0x160 kernel/sched/core.c:3774 Code: 80 e1 07 80 c1 03 38 c1 0f 8c 3b ff ff ff 4c 89 e7 e8 3e 09 60 00 e9 2e ff ff ff 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 <41> 56 53 89 fb 65 01 3d 3a 00 af 7e 48 c7 c0 60 51 47 8a 48 c1 e8 RSP: 0018:ffffc90002167620 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff8163d517 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001 RBP: ffffc90002167628 R08: dffffc0000000000 R09: ffffed1015d46fc5 R10: ffffed1015d46fc5 R11: 0000000000000000 R12: ffff888094d680c0 R13: ffffffff8165c180 R14: 0000000000000000 R15: 1ffff9200042cee1 is_module_text_address+0x1a/0x150 kernel/module.c:4494 kernel_text_address kernel/extable.c:143 [inline] __kernel_text_address+0x88/0x110 kernel/extable.c:104 unwind_get_return_address+0x4c/0x90 arch/x86/kernel/unwind_frame.c:19 arch_stack_walk+0x98/0xe0 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0xb6/0x150 kernel/stacktrace.c:123 save_stack mm/kasan/common.c:72 [inline] set_track mm/kasan/common.c:80 [inline] __kasan_kmalloc+0x11c/0x1b0 mm/kasan/common.c:513 kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:521 slab_post_alloc_hook mm/slab.h:584 [inline] slab_alloc_node mm/slab.c:3263 [inline] kmem_cache_alloc_node_trace+0x225/0x2d0 mm/slab.c:3593 kmalloc_node include/linux/slab.h:574 [inline] kzalloc_node include/linux/slab.h:681 [inline] __get_vm_area_node+0x14f/0x350 mm/vmalloc.c:2102 __vmalloc_node_range+0xe1/0x850 mm/vmalloc.c:2541 __vmalloc_node mm/vmalloc.c:2601 [inline] __vmalloc_node_flags mm/vmalloc.c:2615 [inline] vzalloc+0x73/0x80 mm/vmalloc.c:2660 alloc_counters+0x6b/0x6e0 net/ipv6/netfilter/ip6_tables.c:816 copy_entries_to_user net/ipv4/netfilter/arp_tables.c:675 [inline] get_entries net/ipv4/netfilter/arp_tables.c:862 [inline] do_arpt_get_ctl+0x420/0x7e0 net/ipv4/netfilter/arp_tables.c:1483 nf_sockopt net/netfilter/nf_sockopt.c:104 [inline] nf_getsockopt+0x287/0x2b0 net/netfilter/nf_sockopt.c:122 ip_getsockopt+0x10b/0x1f0 net/ipv4/ip_sockglue.c:1576 tcp_getsockopt+0xbe/0xd0 net/ipv4/tcp.c:3690 sock_common_getsockopt+0x99/0xb0 net/core/sock.c:3108 __sys_getsockopt+0x24c/0x2b0 net/socket.c:2162 __do_sys_getsockopt net/socket.c:2177 [inline] __se_sys_getsockopt net/socket.c:2174 [inline] __x64_sys_getsockopt+0xbf/0xd0 net/socket.c:2174 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45da5a Code: b8 34 01 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 8d 8b fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 37 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 6a 8b fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007ffe8559f628 EFLAGS: 00000212 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007ffe8559f640 RCX: 000000000045da5a RDX: 0000000000000061 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000003 R08: 00007ffe8559f63c R09: 0000000000000001 R10: 00007ffe8559f640 R11: 0000000000000212 R12: 00000000000003e0 R13: 00007ffe8559fcc0 R14: 0000000000000003 R15: 00007ffe8559fcd0 rcu: rcu_preempt kthread starved for 10563 jiffies! g6533 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 28984 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