libceph: connect (2)127.0.0.1:6667 error -101
BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 1 PID: 5171 Comm: kworker/1:12 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: ceph-msgr ceph_con_workfn
Call trace:
 dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf4/0x15c lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 add_chain_cache kernel/locking/lockdep.c:-1 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3777 [inline]
 validate_chain kernel/locking/lockdep.c:3798 [inline]
 __lock_acquire+0x1864/0x6634 kernel/locking/lockdep.c:5063
 lock_acquire+0x20c/0x638 kernel/locking/lockdep.c:5676
 __timer_delete_sync+0xa0/0x21c kernel/time/timer.c:1556
 timer_delete_sync+0x24/0x34 kernel/time/timer.c:1629
 del_timer_sync include/linux/timer.h:200 [inline]
 sk_stop_timer_sync+0x24/0xbc net/core/sock.c:3405
 inet_csk_clear_xmit_timers_sync+0xe0/0x16c net/ipv4/inet_connection_sock.c:779
 tcp_close+0x78/0x140 net/ipv4/tcp.c:3085
 inet_release+0x154/0x1cc net/ipv4/af_inet.c:430
 __sock_release net/socket.c:654 [inline]
 sock_release+0x88/0x144 net/socket.c:682
 ceph_tcp_connect+0x4bc/0x6a4 net/ceph/messenger.c:466
 ceph_con_v2_try_write+0x874/0x18b4 net/ceph/messenger_v2.c:3201
 ceph_con_workfn+0x228/0xdcc net/ceph/messenger.c:1516
 process_one_work+0x7e4/0x13bc kernel/workqueue.c:2292
 worker_thread+0x8cc/0xfe8 kernel/workqueue.c:2439
 kthread+0x254/0x2e0 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850
libceph: ceph_tcp_connect failed: -101
libceph: mon0 (2)127.0.0.1:6667 connect error
libceph: connect (2)127.0.0.1:6667 error -101
libceph: ceph_tcp_connect failed: -101
libceph: mon0 (2)127.0.0.1:6667 connect error
libceph: connect (2)127.0.0.1:6667 error -101
libceph: ceph_tcp_connect failed: -101
libceph: mon0 (2)127.0.0.1:6667 connect error