BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 0 PID: 15439 Comm: syz-executor.5 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_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x8c/0xbf kernel/locking/spinlock.c:159
 serial8250_console_write+0x23f/0x970 drivers/tty/serial/8250/8250_port.c:3146
 call_console_drivers kernel/printk/printk.c:1791 [inline]
 console_unlock+0xb68/0xf00 kernel/printk/printk.c:2473
 vprintk_emit+0x2a7/0x710 kernel/printk/printk.c:1996
 vprintk_func+0x79/0x17e kernel/printk/printk_safe.c:386
 printk+0xba/0xed kernel/printk/printk.c:2056
 nf_ct_lookup_helper net/netfilter/nf_conntrack_helper.c:220 [inline]
 __nf_ct_try_assign_helper.cold+0x11/0x4a net/netfilter/nf_conntrack_helper.c:259
 init_conntrack.isra.0+0xae7/0x1080 net/netfilter/nf_conntrack_core.c:1639
 resolve_normal_ct net/netfilter/nf_conntrack_core.c:1684 [inline]
 nf_conntrack_in+0x9a8/0x12b0 net/netfilter/nf_conntrack_core.c:1844
 ipv4_conntrack_local+0x119/0x210 net/netfilter/nf_conntrack_proto.c:200
 nf_hook_entry_hookfn include/linux/netfilter.h:135 [inline]
 nf_hook_slow+0xba/0x1e0 net/netfilter/core.c:512
 nf_hook include/linux/netfilter.h:262 [inline]
 __ip_local_out+0x3d4/0x850 net/ipv4/ip_output.c:114
 ip_local_out+0x26/0x1a0 net/ipv4/ip_output.c:123
 __ip_queue_xmit+0x863/0x1c20 net/ipv4/ip_output.c:530
 __tcp_transmit_skb+0x1a02/0x3750 net/ipv4/tcp_output.c:1238
 tcp_transmit_skb net/ipv4/tcp_output.c:1254 [inline]
 tcp_send_syn_data net/ipv4/tcp_output.c:3625 [inline]
 tcp_connect+0x1dc7/0x42a0 net/ipv4/tcp_output.c:3664
 tcp_v4_connect+0x14f0/0x1c10 net/ipv4/tcp_ipv4.c:311
 __inet_stream_connect+0x80f/0xe30 net/ipv4/af_inet.c:655
 tcp_sendmsg_fastopen net/ipv4/tcp.c:1164 [inline]
 tcp_sendmsg_locked+0x243a/0x3210 net/ipv4/tcp.c:1206
 tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1433
 inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:807
 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:00007fd5c4cacc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fd5c4cad6d4 RCX: 000000000045c849
RDX: 0000000024000844 RSI: 0000000020000fc0 RDI: 0000000000000004
RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000009f2 R14: 00000000004cca9c R15: 000000000076bf0c