netlink: 8 bytes leftover after parsing attributes in process `syz-executor2'.
===============================
[ INFO: suspicious RCU usage. ]
4.4.173+ #3 Not tainted
-------------------------------
net/ipv6/ip6_fib.c:1465 suspicious rcu_dereference_protected() usage!

other info that might help us debug this:


rcu_scheduler_active = 1, debug_locks = 0
4 locks held by syz-executor0/7045:
 #0:  (((&net->ipv6.ip6_fib_timer))){+.-...}, at: [<ffffffff8125822e>] lockdep_copy_map include/linux/lockdep.h:165 [inline]
 #0:  (((&net->ipv6.ip6_fib_timer))){+.-...}, at: [<ffffffff8125822e>] call_timer_fn+0xde/0x850 kernel/time/timer.c:1175
 #1:  (fib6_gc_lock){+.-...}, at: [<ffffffff825fa0ea>] spin_lock_bh include/linux/spinlock.h:307 [inline]
 #1:  (fib6_gc_lock){+.-...}, at: [<ffffffff825fa0ea>] fib6_run_gc+0x3a/0x230 net/ipv6/ip6_fib.c:1811
 #2:  (rcu_read_lock){......}, at: [<ffffffff825f1c90>] __fib6_clean_all+0x0/0x240 net/ipv6/ip6_fib.c:1698
 #3:  (&tb->tb6_lock){++--..}, at: [<ffffffff825f1d78>] __fib6_clean_all+0xe8/0x240 net/ipv6/ip6_fib.c:1712

stack backtrace:
CPU: 1 PID: 7045 Comm: syz-executor0 Not tainted 4.4.173+ #3
 0000000000000000 f82e6d48a298f7a4 ffff8801db707940 ffffffff81aad1a1
 ffff8801d6d9bc00 0000000000000000 0000000000000001 00000000000005b9
 ffff8801c06317c0 ffff8801db707970 ffffffff813ab7d6 ffff8801db707b90
Call Trace:
 <IRQ>  [<ffffffff81aad1a1>] __dump_stack lib/dump_stack.c:15 [inline]
 <IRQ>  [<ffffffff81aad1a1>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
 [<ffffffff813ab7d6>] lockdep_rcu_suspicious.cold+0x10a/0x149 kernel/locking/lockdep.c:4305
 [<ffffffff825f988a>] fib6_del+0x7ea/0xae0 net/ipv6/ip6_fib.c:1465
 [<ffffffff825f9e1c>] fib6_clean_node+0x29c/0x500 net/ipv6/ip6_fib.c:1652
 [<ffffffff825f15e0>] fib6_walk_continue+0x3e0/0x630 net/ipv6/ip6_fib.c:1578
 [<ffffffff825f1b21>] fib6_walk+0x91/0xe0 net/ipv6/ip6_fib.c:1623
 [<ffffffff825f1c58>] fib6_clean_tree+0xe8/0x120 net/ipv6/ip6_fib.c:1697
 [<ffffffff825f1d90>] __fib6_clean_all+0x100/0x240 net/ipv6/ip6_fib.c:1713
 [<ffffffff825fa15f>] fib6_clean_all net/ipv6/ip6_fib.c:1724 [inline]
 [<ffffffff825fa15f>] fib6_run_gc+0xaf/0x230 net/ipv6/ip6_fib.c:1821
 [<ffffffff825fa2fd>] fib6_gc_timer_cb+0x1d/0x30 net/ipv6/ip6_fib.c:1836
 [<ffffffff812582dd>] call_timer_fn+0x18d/0x850 kernel/time/timer.c:1185
 [<ffffffff81258ebf>] __run_timers kernel/time/timer.c:1261 [inline]
 [<ffffffff81258ebf>] run_timer_softirq+0x51f/0xb70 kernel/time/timer.c:1444
 [<ffffffff8271bc96>] __do_softirq+0x226/0xa3f kernel/softirq.c:273
 [<ffffffff810e1a8a>] invoke_softirq kernel/softirq.c:350 [inline]
 [<ffffffff810e1a8a>] irq_exit+0x10a/0x150 kernel/softirq.c:391
 [<ffffffff8271b3ce>] exiting_irq arch/x86/include/asm/apic.h:652 [inline]
 [<ffffffff8271b3ce>] smp_apic_timer_interrupt+0x7e/0xb0 arch/x86/kernel/apic/apic.c:926
 [<ffffffff8271a71d>] apic_timer_interrupt+0x9d/0xb0 arch/x86/entry/entry_64.S:768
 <EOI> 
input: syz1 as /devices/virtual/input/input136
input: syz1 as /devices/virtual/input/input137
input: syz1 as /devices/virtual/input/input138
input: syz1 as /devices/virtual/input/input139
input: syz1 as /devices/virtual/input/input140
input: syz1 as /devices/virtual/input/input141