netlink: 'syz-executor.2': attribute type 8 has an invalid length. netlink: 20 bytes leftover after parsing attributes in process `syz-executor.1'. rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (1 GPs behind) idle=81e/1/0x4000000000000004 softirq=200378/200385 fqs=5238 rcu: (t=10501 jiffies g=205933 q=251685) NMI backtrace for cpu 0 CPU: 0 PID: 4008 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:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:lock_acquire+0x1ea/0x3f0 kernel/locking/lockdep.c:3906 Code: 7c 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 c4 01 00 00 48 83 3d 9a 12 a0 07 00 0f 84 38 01 00 00 48 8b 7d c8 57 9d <0f> 1f 44 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 65 8b RSP: 0000:ffff8880ae807c78 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff11e4ae9 RBX: ffff888037a42240 RCX: 000000002625ff6b RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000286 RBP: ffff8880ae807cc0 R08: 0000000000000d16 R09: 0000000000000002 R10: ffff888037a42b10 R11: ffffffff8a761ff0 R12: ffff88807d2bf070 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] garp_join_timer+0x25/0x80 net/802/garp.c:408 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:__read_once_size include/linux/compiler.h:193 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:69 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x20/0x50 kernel/kcov.c:101 Code: 90 90 90 90 90 90 90 90 90 90 55 48 89 e5 48 8b 75 08 65 48 8b 04 25 40 ee 01 00 65 8b 15 38 e2 96 7e 81 e2 00 01 1f 00 75 2b <8b> 90 d0 12 00 00 83 fa 02 75 20 48 8b 88 d8 12 00 00 8b 80 d4 12 RSP: 0000:ffff88802adb73c0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff888037a42240 RBX: ffff8880a513b108 RCX: ffffffff81934c7b RDX: 0000000000000000 RSI: ffffffff81934c25 RDI: 0000000000000007 RBP: ffff88802adb73c0 R08: ffff888037a42240 R09: fffff9400040b8df R10: fffff9400040b8de R11: ffffea000205c6f3 R12: ffff8880a513b160 R13: dffffc0000000000 R14: ffff888097ced1a0 R15: ffff88805af5c1a0 vma_interval_tree_iter_next+0x95/0x240 mm/interval_tree.c:24 rmap_walk_file+0x5b5/0xd10 mm/rmap.c:1878 rmap_walk+0x130/0x1c0 mm/rmap.c:1905 try_to_munlock+0x3f8/0x610 mm/rmap.c:1756 __munlock_isolated_page+0x320/0x4e0 mm/mlock.c:138 __munlock_pagevec+0x93f/0x13d0 mm/mlock.c:346 munlock_vma_pages_range+0x93f/0xff0 mm/mlock.c:499 munlock_vma_pages_all mm/internal.h:294 [inline] exit_mmap+0x20a/0x530 mm/mmap.c:3075 __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:00007fda0987fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000097 RAX: 0000000000000000 RBX: 00007fda098806d4 RCX: 000000000045b399 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000731 R14: 00000000004c8a7a R15: 000000000075bfd4