netlink: 4 bytes leftover after parsing attributes in process `syz-executor.2'. rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: (detected by 1, t=10502 jiffies, g=409893, q=497) rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4295147816-4295137314), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor.3 R running task 27776 17781 8133 0x00000008 Call Trace: sched_show_task.cold+0x332/0x396 kernel/sched/core.c:5341 print_other_cpu_stall kernel/rcu/tree.c:1430 [inline] check_cpu_stall kernel/rcu/tree.c:1557 [inline] __rcu_pending kernel/rcu/tree.c:3293 [inline] rcu_pending kernel/rcu/tree.c:3336 [inline] rcu_check_callbacks.cold+0xb37/0xe19 kernel/rcu/tree.c:2682 update_process_times+0x2a/0x70 kernel/time/timer.c:1650 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:168 tick_sched_timer+0xfc/0x290 kernel/time/tick-sched.c:1278 __run_hrtimer kernel/time/hrtimer.c:1401 [inline] __hrtimer_run_queues+0x3f6/0xe60 kernel/time/hrtimer.c:1463 hrtimer_interrupt+0x32a/0x930 kernel/time/hrtimer.c:1521 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline] smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1092 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] RIP: 0010:_raw_spin_unlock_irq+0x50/0x80 kernel/locking/spinlock.c:192 Code: c0 98 81 f1 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 31 48 83 3d 61 a8 db 01 00 74 25 fb 66 0f 1f 44 00 00 01 00 00 00 e8 46 d2 2c f9 65 8b 05 bf 05 ec 77 85 c0 74 02 5d RSP: 0018:ffff8880ba107dd0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3033 RBX: dffffc0000000000 RCX: 1ffff110043ae9af RDX: dffffc0000000000 RSI: ffff888021d74d58 RDI: ffff888021d74d04 RBP: ffff8880ba122b00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff86a66ee0 R13: ffff8880ba122b00 R14: ffff8880ba107e68 R15: 0000000000000000 expire_timers+0x238/0x4e0 kernel/time/timer.c:1374 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x26c/0x9a0 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:544 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1094 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:__call_rcu.constprop.0+0x278/0x7f0 kernel/rcu/tree.c:3031 Code: 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 8d 04 00 00 48 83 3d 9c fa 9d 08 00 0f 84 dc 02 00 00 48 8b 3c 24 57 9d <0f> 1f 44 00 00 48 83 c4 20 5b 5d 41 5c 41 5d 41 5e 41 5f c3 80 3d RSP: 0018:ffff888227e17760 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3031 RBX: ffff8880442571d0 RCX: 1ffff110043ae9af RDX: dffffc0000000000 RSI: ffff888021d74d58 RDI: 0000000000000286 RBP: ffff8880ba12be90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff89f87f40 R13: ffff8880ba12be00 R14: ffff8880ba12be80 R15: ffff8880ba12be38 __purge_vmap_area_lazy+0x17c/0x280 mm/vmalloc.c:687 vm_unmap_aliases mm/vmalloc.c:1113 [inline] vm_unmap_aliases+0x415/0x510 mm/vmalloc.c:1076 change_page_attr_set_clr+0x247/0xc60 arch/x86/mm/pageattr.c:1497 change_page_attr_clear arch/x86/mm/pageattr.c:1560 [inline] set_memory_ro+0x78/0xa0 arch/x86/mm/pageattr.c:1789 bpf_jit_binary_lock_ro include/linux/filter.h:686 [inline] bpf_int_jit_compile+0x6a7/0xb84 arch/x86/net/bpf_jit_comp.c:1148 bpf_prog_select_runtime+0x51c/0x620 kernel/bpf/core.c:1559 bpf_migrate_filter+0x2dc/0x380 net/core/filter.c:1273 bpf_prepare_filter+0x183/0x370 net/core/filter.c:1321 __get_filter+0x1d4/0x270 net/core/filter.c:1490 sk_attach_filter+0x1c/0x170 net/core/filter.c:1505 sock_setsockopt+0x138d/0x2060 net/core/sock.c:893 __sys_setsockopt+0x203/0x240 net/socket.c:1897 __do_sys_setsockopt net/socket.c:1912 [inline] __se_sys_setsockopt net/socket.c:1909 [inline] __x64_sys_setsockopt+0xba/0x150 net/socket.c:1909 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45e159 Code: 0d b4 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 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffb5f770c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045e159 RDX: 000000000000001a RSI: 0000000000000001 RDI: 0000000000000005 RBP: 000000000119bfd0 R08: 0000000000000010 R09: 0000000000000000 R10: 0000000020000480 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007ffd38d175bf R14: 00007ffb5f7719c0 R15: 000000000119bf8c rcu: rcu_preempt kthread starved for 10502 jiffies! g409893 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 29208 10 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 schedule_timeout+0x4cf/0xfe0 kernel/time/timer.c:1818 rcu_gp_kthread+0xdad/0x21c0 kernel/rcu/tree.c:2202 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415