BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 1 PID: 31090 Comm: syz-executor.5 Not tainted 5.8.0-rc5-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+0x18f/0x20d lib/dump_stack.c:118
 add_chain_cache kernel/locking/lockdep.c:3063 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3162 [inline]
 validate_chain kernel/locking/lockdep.c:3183 [inline]
 __lock_acquire.cold+0x11/0x3f8 kernel/locking/lockdep.c:4380
 lock_acquire+0x1f1/0xad0 kernel/locking/lockdep.c:4959
 seqcount_lockdep_reader_access include/linux/seqlock.h:97 [inline]
 read_seqcount_begin include/linux/seqlock.h:182 [inline]
 read_seqbegin include/linux/seqlock.h:466 [inline]
 zone_span_seqbegin include/linux/memory_hotplug.h:80 [inline]
 page_outside_zone_boundaries+0xbb/0x310 mm/page_alloc.c:568
 bad_range mm/page_alloc.c:597 [inline]
 rmqueue mm/page_alloc.c:3408 [inline]
 get_page_from_freelist+0xb7f/0x36b0 mm/page_alloc.c:3791
 __alloc_pages_nodemask+0x2cd/0x930 mm/page_alloc.c:4844
 alloc_pages_current+0x187/0x280 mm/mempolicy.c:2292
 alloc_pages include/linux/gfp.h:545 [inline]
 stack_depot_save+0x37c/0x400 lib/stackdepot.c:279
 save_stack+0x32/0x40 mm/kasan/common.c:50
 set_track mm/kasan/common.c:56 [inline]
 kasan_set_free_info mm/kasan/common.c:316 [inline]
 __kasan_slab_free+0xf5/0x140 mm/kasan/common.c:455
 __cache_free mm/slab.c:3426 [inline]
 kmem_cache_free+0x7f/0x310 mm/slab.c:3694
 kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:622
 __kfree_skb net/core/skbuff.c:679 [inline]
 consume_skb net/core/skbuff.c:837 [inline]
 consume_skb+0xcf/0x160 net/core/skbuff.c:831
 netlink_broadcast_filtered+0x35c/0xdc0 net/netlink/af_netlink.c:1513
 netlink_broadcast net/netlink/af_netlink.c:1535 [inline]
 nlmsg_multicast include/net/netlink.h:1020 [inline]
 nlmsg_notify+0x90/0x250 net/netlink/af_netlink.c:2512
 inet6_rt_notify+0x1f0/0x2b0 net/ipv6/route.c:6024
 fib6_del_route net/ipv6/ip6_fib.c:1987 [inline]
 fib6_del+0xfcd/0x1630 net/ipv6/ip6_fib.c:2017
 fib6_clean_node+0x39b/0x570 net/ipv6/ip6_fib.c:2179
 fib6_walk_continue+0x4aa/0x8e0 net/ipv6/ip6_fib.c:2101
 fib6_walk+0x182/0x370 net/ipv6/ip6_fib.c:2149
 fib6_clean_tree+0xdb/0x120 net/ipv6/ip6_fib.c:2229
 __fib6_clean_all+0x120/0x290 net/ipv6/ip6_fib.c:2245
 fib6_clean_all net/ipv6/ip6_fib.c:2256 [inline]
 fib6_run_gc+0x113/0x2d0 net/ipv6/ip6_fib.c:2319
 ndisc_netdev_event+0x217/0x350 net/ipv6/ndisc.c:1805
 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2027
 call_netdevice_notifiers_extack net/core/dev.c:2039 [inline]
 call_netdevice_notifiers net/core/dev.c:2053 [inline]
 dev_close_many+0x30b/0x650 net/core/dev.c:1628
 rollback_registered_many+0x3af/0xf60 net/core/dev.c:8945
 rollback_registered net/core/dev.c:9013 [inline]
 unregister_netdevice_queue+0x2dd/0x570 net/core/dev.c:10094
 unregister_netdevice include/linux/netdevice.h:2754 [inline]
 __tun_detach+0xff6/0x1310 drivers/net/tun.c:691
 tun_detach drivers/net/tun.c:708 [inline]
 tun_chr_close+0xd9/0x180 drivers/net/tun.c:3423
 __fput+0x33c/0x880 fs/file_table.c:281
 task_work_run+0xdd/0x190 kernel/task_work.c:135
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop arch/x86/entry/common.c:239 [inline]
 __prepare_exit_to_usermode+0x1e9/0x1f0 arch/x86/entry/common.c:269
 __do_fast_syscall_32 arch/x86/entry/common.c:475 [inline]
 do_fast_syscall_32+0x7f/0x120 arch/x86/entry/common.c:503
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf7f76569
Code: Bad RIP value.
RSP: 002b:00000000086afbec EFLAGS: 00000212 ORIG_RAX: 0000000000000006
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000
RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000