BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 0 PID: 15985 Comm: syz-executor.2 Not tainted 5.6.0-rc7-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+0x188/0x20d lib/dump_stack.c:118
 add_chain_cache kernel/locking/lockdep.c:2840 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:2914 [inline]
 validate_chain kernel/locking/lockdep.c:2935 [inline]
 __lock_acquire.cold+0x263/0x288 kernel/locking/lockdep.c:3954
 lock_acquire+0x197/0x420 kernel/locking/lockdep.c:4484
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
 spin_lock include/linux/spinlock.h:338 [inline]
 rps_lock net/core/dev.c:220 [inline]
 enqueue_to_backlog+0xde/0xc80 net/core/dev.c:4445
 netif_rx_internal+0x127/0x620 net/core/dev.c:4704
 netif_rx+0x82/0x5f0 net/core/dev.c:4731
 loopback_xmit+0x261/0x6ec drivers/net/loopback.c:88
 __netdev_start_xmit include/linux/netdevice.h:4523 [inline]
 netdev_start_xmit include/linux/netdevice.h:4537 [inline]
 xmit_one net/core/dev.c:3477 [inline]
 dev_hard_start_xmit+0x1a4/0x9b0 net/core/dev.c:3493
 __dev_queue_xmit+0x25e1/0x30a0 net/core/dev.c:4052
 neigh_resolve_output net/core/neighbour.c:1487 [inline]
 neigh_resolve_output+0x566/0x930 net/core/neighbour.c:1467
 neigh_output include/net/neighbour.h:510 [inline]
 ip6_finish_output2+0x1091/0x25b0 net/ipv6/ip6_output.c:116
 __ip6_finish_output+0x442/0xab0 net/ipv6/ip6_output.c:142
 ip6_finish_output+0x34/0x1f0 net/ipv6/ip6_output.c:152
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip6_output+0x239/0x810 net/ipv6/ip6_output.c:175
 dst_output include/net/dst.h:436 [inline]
 ip6_local_out+0xaf/0x1a0 net/ipv6/output_core.c:179
 ip6_send_skb+0xb4/0x340 net/ipv6/ip6_output.c:1795
 ip6_push_pending_frames+0xbd/0xe0 net/ipv6/ip6_output.c:1815
 icmpv6_push_pending_frames+0x33a/0x530 net/ipv6/icmp.c:285
 icmp6_send+0x1afb/0x2010 net/ipv6/icmp.c:598
 icmpv6_send+0xde/0x210 net/ipv6/ip6_icmp.c:43
 ip6_link_failure+0x26/0x520 net/ipv6/route.c:2643
 dst_link_failure include/net/dst.h:419 [inline]
 vti6_xmit net/ipv6/ip6_vti.c:537 [inline]
 vti6_tnl_xmit+0xfcb/0x1d20 net/ipv6/ip6_vti.c:576
 __netdev_start_xmit include/linux/netdevice.h:4523 [inline]
 netdev_start_xmit include/linux/netdevice.h:4537 [inline]
 xmit_one net/core/dev.c:3477 [inline]
 dev_hard_start_xmit+0x1a4/0x9b0 net/core/dev.c:3493
 __dev_queue_xmit+0x25e1/0x30a0 net/core/dev.c:4052
 neigh_output include/net/neighbour.h:510 [inline]
 ip6_finish_output2+0x1091/0x25b0 net/ipv6/ip6_output.c:116
 __ip6_finish_output+0x442/0xab0 net/ipv6/ip6_output.c:142
 ip6_finish_output+0x34/0x1f0 net/ipv6/ip6_output.c:152
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip6_output+0x239/0x810 net/ipv6/ip6_output.c:175
 dst_output include/net/dst.h:436 [inline]
 ip6_local_out+0xaf/0x1a0 net/ipv6/output_core.c:179
 ip6_send_skb+0xb4/0x340 net/ipv6/ip6_output.c:1795
 udp_v6_send_skb.isra.0+0x7b5/0x15c0 net/ipv6/udp.c:1172
 udp_v6_push_pending_frames+0x254/0x360 net/ipv6/udp.c:1205
 udpv6_sendmsg+0x1c9e/0x2b50 net/ipv6/udp.c:1497
 inet6_sendmsg+0x99/0xe0 net/ipv6/af_inet6.c:576
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:672
 ____sys_sendmsg+0x6b9/0x7d0 net/socket.c:2345
 ___sys_sendmsg+0x100/0x170 net/socket.c:2399
 __sys_sendmsg+0xec/0x1b0 net/socket.c:2432
 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c849
Code: ad b6 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fbfe6f66c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fbfe6f676d4 RCX: 000000000045c849
RDX: 0000000000000000 RSI: 0000000020000580 RDI: 0000000000000003
RBP: 000000000076bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000009f5 R14: 00000000004ccac9 R15: 000000000076bfac