netlink: 'syz-executor.5': attribute type 1 has an invalid length. netlink: 28 bytes leftover after parsing attributes in process `syz-executor.5'. rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (10496 ticks this GP) idle=7ce/1/0x4000000000000004 softirq=157302/157306 fqs=5248 rcu: (t=10501 jiffies g=164069 q=3237) NMI backtrace for cpu 1 CPU: 1 PID: 19042 Comm: syz-executor.0 Not tainted 4.19.102-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x189/0x1d5 kernel/rcu/tree.c:1340 print_cpu_stall kernel/rcu/tree.c:1478 [inline] check_cpu_stall kernel/rcu/tree.c:1550 [inline] __rcu_pending kernel/rcu/tree.c:3293 [inline] rcu_pending kernel/rcu/tree.c:3336 [inline] rcu_check_callbacks.cold+0x5e3/0xd90 kernel/rcu/tree.c:2682 update_process_times+0x32/0x80 kernel/time/timer.c:1638 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:168 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1278 __run_hrtimer kernel/time/hrtimer.c:1401 [inline] __hrtimer_run_queues+0x33b/0xdc0 kernel/time/hrtimer.c:1463 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1521 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline] smp_apic_timer_interrupt+0x111/0x550 arch/x86/kernel/apic/apic.c:1092 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0010:mrp_pdu_queue+0x3b/0x350 net/802/mrp.c:334 Code: 8d ab 28 01 00 00 48 83 ec 18 e8 a0 64 92 fb 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 74 02 00 00 <4c> 8b a3 28 01 00 00 4d 85 e4 0f 84 24 02 00 00 e8 70 64 92 fb 49 RSP: 0018:ffff8880ae907ca0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffff888059673840 RCX: ffffffff81530837 RDX: 1ffff1100b2ce72d RSI: ffffffff85d8a6e0 RDI: ffff888059673840 RBP: ffff8880ae907ce0 R08: 1ffff1100b2ce71c R09: ffffed100b2ce71d R10: ffffed100b2ce71c R11: ffff8880596738e3 R12: ffff8880596738e0 R13: ffff888059673968 R14: 1ffff11015d20fa6 R15: 0000000000000000 mrp_join_timer+0x40/0x80 net/802/mrp.c:595 call_timer_fn+0x18d/0x720 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers kernel/time/timer.c:1684 [inline] __run_timers kernel/time/timer.c:1652 [inline] run_timer_softirq+0x64f/0x16a0 kernel/time/timer.c:1697 __do_softirq+0x25c/0x921 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x13b/0x550 arch/x86/kernel/apic/apic.c:1094 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x95/0xe0 kernel/locking/spinlock.c:184 Code: 48 c7 c0 48 57 f2 88 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 39 48 83 3d 7a 4c 9d 01 00 74 24 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 3c c4 f3 f9 65 8b 05 e5 e2 ac 78 RSP: 0018:ffff88802988f3e8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff11e4ae9 RBX: 0000000000000286 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000286 RBP: ffff88802988f3f8 R08: ffff888088bb8040 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8ae06f08 R13: 0000000000000286 R14: ffffffff8ae06f08 R15: 0000000000000000 __debug_check_no_obj_freed lib/debugobjects.c:798 [inline] debug_check_no_obj_freed+0x200/0x464 lib/debugobjects.c:817 free_pages_prepare mm/page_alloc.c:1055 [inline] __free_pages_ok+0x252/0xd90 mm/page_alloc.c:1273 free_compound_page+0x68/0x90 mm/page_alloc.c:594 free_transhuge_page+0x230/0x310 mm/huge_memory.c:2804 __put_compound_page+0x90/0xd0 mm/swap.c:96 release_pages+0x5e0/0x1990 mm/swap.c:768 free_pages_and_swap_cache+0x2a0/0x3d0 mm/swap_state.c:319 tlb_flush_mmu_free+0x7e/0x150 mm/memory.c:249 zap_pte_range mm/memory.c:1405 [inline] zap_pmd_range mm/memory.c:1440 [inline] zap_pud_range mm/memory.c:1469 [inline] zap_p4d_range mm/memory.c:1490 [inline] unmap_page_range+0x186c/0x1fb0 mm/memory.c:1511 unmap_single_vma+0x19d/0x300 mm/memory.c:1556 unmap_vmas+0xae/0x180 mm/memory.c:1586 exit_mmap+0x2c2/0x530 mm/mmap.c:3091 __mmput kernel/fork.c:1015 [inline] mmput+0x15f/0x4c0 kernel/fork.c:1036 exit_mm kernel/exit.c:546 [inline] do_exit+0xb1e/0x30d0 kernel/exit.c:867 do_group_exit+0x135/0x370 kernel/exit.c:983 get_signal+0x3ec/0x1fc0 kernel/signal.c:2583 do_signal+0x95/0x1960 arch/x86/kernel/signal.c:821 exit_to_usermode_loop+0x244/0x2c0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x53d/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45b399 Code: Bad RIP value. RSP: 002b:00007f5b1fb0ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffea RBX: 00007f5b1fb0f6d4 RCX: 000000000045b399 RDX: 0000000000000030 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 000000000075bf20 R08: 0000000000000090 R09: 0000000000000000 R10: 0000000020000580 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000a76 R14: 00000000004d4cf0 R15: 000000000075bf2c