BUG: MAX_LOCKDEP_CHAINS too low! turning off the locking correctness validator. CPU: 0 PID: 6216 Comm: syz-executor.0 Not tainted 4.14.231-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 add_chain_cache kernel/locking/lockdep.c:2303 [inline] lookup_chain_cache_add kernel/locking/lockdep.c:2415 [inline] validate_chain kernel/locking/lockdep.c:2435 [inline] __lock_acquire.cold+0x19a/0x97c kernel/locking/lockdep.c:3491 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:152 rq_lock kernel/sched/sched.h:1741 [inline] __schedule+0x1df/0x1de0 kernel/sched/core.c:3321 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:3508 ___preempt_schedule+0x16/0x18 __local_bh_enable_ip+0x132/0x170 kernel/softirq.c:192 spin_unlock_bh include/linux/spinlock.h:362 [inline] tipc_bcast_unlock net/tipc/bcast.h:102 [inline] tipc_nl_add_bc_link+0x10f3/0x16e0 net/tipc/link.c:2126 tipc_nl_node_dump_link+0x53d/0xab0 net/tipc/node.c:2016 genl_lock_dumpit+0x60/0x90 net/netlink/genetlink.c:481 netlink_dump+0x39c/0xad0 net/netlink/af_netlink.c:2203 __netlink_dump_start+0x4e2/0x740 net/netlink/af_netlink.c:2300 genl_family_rcv_msg+0x95c/0xb20 net/netlink/genetlink.c:549 genl_rcv_msg+0xaf/0x140 net/netlink/genetlink.c:625 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2433 genl_rcv+0x24/0x40 net/netlink/genetlink.c:636 netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline] netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1313 netlink_sendmsg+0x62e/0xb80 net/netlink/af_netlink.c:1878 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062 __sys_sendmsg+0xa3/0x120 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0x27/0x40 net/socket.c:2103 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x4665f9 RSP: 002b:00007fe537898188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665f9 RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000007 RBP: 00000000004bfbb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffe7350f34f R14: 00007fe537898300 R15: 0000000000022000         tmpfs: Bad value 'bind: ' for mount option 'mpol'  tmpfs: Bad value 'bind: ' for mount option 'mpol'  tmpfs: Bad value 'bind: ' for mount option 'mpol' tmpfs: Bad value 'bind: ' for mount option 'mpol' tmpfs: Bad value 'bind: ' for mount option 'mpol' tmpfs: Bad value 'bind: ' for mount option 'mpol' tmpfs: Bad value 'bind: ' for mount option 'mpol' tmpfs: Bad value 'bind: ' for mount option 'mpol' kauditd_printk_skb: 7 callbacks suppressed audit: type=1804 audit(1619335960.274:659): pid=6986 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir215334935/syzkaller.ZB8DEH/332/bus" dev="sda1" ino=14970 res=1 ptrace attach of "/root/syz-executor.2"[6969] was attempted by "/root/syz-executor.2"[6978] ptrace attach of "/root/syz-executor.2"[7049] was attempted by "/root/syz-executor.2"[7053] audit: type=1804 audit(1619335961.364:660): pid=7045 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir215334935/syzkaller.ZB8DEH/333/bus" dev="sda1" ino=15001 res=1 ptrace attach of "/root/syz-executor.3"[7059] was attempted by "/root/syz-executor.3"[7064] ptrace attach of "/root/syz-executor.3"[7097] was attempted by "/root/syz-executor.3"[7098] ptrace attach of "/root/syz-executor.2"[7093] was attempted by "/root/syz-executor.2"[7096] ptrace attach of "/root/syz-executor.2"[7129] was attempted by "/root/syz-executor.2"[7130] ptrace attach of "/root/syz-executor.5"[7132] was attempted by "/root/syz-executor.5"[7133] ptrace attach of "/root/syz-executor.3"[7155] was attempted by "/root/syz-executor.3"[7160] audit: type=1804 audit(1619335962.404:661): pid=7164 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir215334935/syzkaller.ZB8DEH/334/bus" dev="sda1" ino=15000 res=1 ptrace attach of "/root/syz-executor.5"[7185] was attempted by "/root/syz-executor.5"[7186] audit: type=1804 audit(1619335962.854:662): pid=7209 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name="/root/syzkaller-testdir779295430/syzkaller.Km0Wgz/268/bus" dev="sda1" ino=15012 res=1 audit: type=1804 audit(1619335962.854:663): pid=7207 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.0" name="/root/syzkaller-testdir530920487/syzkaller.I2mFST/265/bus" dev="sda1" ino=14988 res=1 audit: type=1804 audit(1619335962.884:664): pid=7206 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.1" name="/root/syzkaller-testdir226365278/syzkaller.eoNm7t/306/bus" dev="sda1" ino=14987 res=1 audit: type=1804 audit(1619335963.154:665): pid=7222 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.5" name="/root/syzkaller-testdir515256173/syzkaller.Cfm7bA/241/bus" dev="sda1" ino=15015 res=1 audit: type=1804 audit(1619335963.574:666): pid=7231 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir215334935/syzkaller.ZB8DEH/335/bus" dev="sda1" ino=15001 res=1 audit: type=1804 audit(1619335963.814:667): pid=7238 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.3" name="/root/syzkaller-testdir905396712/syzkaller.H456zL/297/bus" dev="sda1" ino=15008 res=1 audit: type=1804 audit(1619335964.024:668): pid=7256 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.1" name="/root/syzkaller-testdir226365278/syzkaller.eoNm7t/307/bus" dev="sda1" ino=15011 res=1 kauditd_printk_skb: 8 callbacks suppressed audit: type=1804 audit(1619335965.584:677): pid=7311 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.5" name="/root/syzkaller-testdir515256173/syzkaller.Cfm7bA/243/bus" dev="sda1" ino=15018 res=1 audit: type=1804 audit(1619335965.914:678): pid=7318 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir215334935/syzkaller.ZB8DEH/337/bus" dev="sda1" ino=14979 res=1 ptrace attach of "/root/syz-executor.3"[7342] was attempted by "/root/syz-executor.3"[7343] ptrace attach of "/root/syz-executor.0"[7340] was attempted by "/root/syz-executor.0"[7341] ptrace attach of "/root/syz-executor.2"[7347] was attempted by "/root/syz-executor.2"[7348] ptrace attach of "/root/syz-executor.1"[7346] was attempted by "/root/syz-executor.1"[7349]