INFO: task syz-executor.4:9972 blocked for more than 143 seconds. Not tainted 6.1.0-syzkaller-11782-g1f47510ed50a #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:25240 pid:9972 ppid:5119 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5244 [inline] __schedule+0xb8a/0x5450 kernel/sched/core.c:6555 schedule+0xde/0x1b0 kernel/sched/core.c:6631 __lock_sock+0x141/0x260 net/core/sock.c:2904 lock_sock_nested+0xda/0xf0 net/core/sock.c:3475 __mptcp_close_ssk+0x19e/0x780 net/mptcp/protocol.c:2322 mptcp_destroy_common+0x169/0x650 net/mptcp/protocol.c:3152 mptcp_disconnect+0xb7/0x450 net/mptcp/protocol.c:3003 __inet_stream_connect+0xc95/0xed0 net/ipv4/af_inet.c:717 tcp_sendmsg_fastopen+0x3c4/0x710 net/ipv4/tcp.c:1200 mptcp_sendmsg_fastopen net/mptcp/protocol.c:1676 [inline] mptcp_sendmsg+0x1359/0x1910 net/mptcp/protocol.c:1715 inet6_sendmsg+0x9d/0xe0 net/ipv6/af_inet6.c:660 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xd3/0x120 net/socket.c:734 ____sys_sendmsg+0x334/0x8c0 net/socket.c:2476 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2530 __sys_sendmmsg+0x18f/0x460 net/socket.c:2616 __do_sys_sendmmsg net/socket.c:2645 [inline] __se_sys_sendmmsg net/socket.c:2642 [inline] __x64_sys_sendmmsg+0x9d/0x100 net/socket.c:2642 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fdcaee8c0c9 RSP: 002b:00007fdcafb0d168 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007fdcaefabf80 RCX: 00007fdcaee8c0c9 RDX: 0000000000000001 RSI: 0000000020008b40 RDI: 0000000000000003 RBP: 00007fdcaeee7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020080040 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffebae19dcf R14: 00007fdcafb0d300 R15: 0000000000022000 Showing all locks held in the system: 4 locks held by kworker/u4:1/11: #0: ffff8880125df938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8880125df938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff8880125df938 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff8880125df938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff8880125df938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff8880125df938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260 #1: ffffc90000107da8 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264 #2: ffffffff8e0aa6d0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9f/0xb10 net/core/net_namespace.c:568 #3: ffffffff8e0be368 (rtnl_mutex){+.+.}-{3:3}, at: cangw_pernet_exit_batch+0x15/0xa0 net/can/gw.c:1250 1 lock held by rcu_tasks_kthre/12: #0: ffffffff8c790c70 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507 1 lock held by rcu_tasks_trace/13: #0: ffffffff8c790970 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507 1 lock held by khungtaskd/28: #0: ffffffff8c7917c0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x57/0x264 kernel/locking/lockdep.c:6494 3 locks held by kworker/0:2/898: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260 #1: ffffc90004c27da8 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264 #2: ffffffff8e0be368 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:75 1 lock held by klogd/4422: #0: ffff8880b983b598 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2f/0x120 kernel/sched/core.c:537 2 locks held by getty/4746: #0: ffff888027d5c098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:244 #1: ffffc900015902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177 2 locks held by kworker/1:6/5174: #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260 #1: ffffc90004dcfda8 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264 3 locks held by kworker/u4:6/5196: 3 locks held by syz-executor.4/9972: #0: ffff8880491c0d30 (sk_lock-AF_INET6){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1725 [inline] #0: ffff8880491c0d30 (sk_lock-AF_INET6){+.+.}-{0:0}, at: mptcp_sendmsg+0xce/0x1910 net/mptcp/protocol.c:1708 #1: ffff888048d70130 (k-sk_lock-AF_INET6){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1725 [inline] #1: ffff888048d70130 (k-sk_lock-AF_INET6){+.+.}-{0:0}, at: mptcp_sendmsg_fastopen net/mptcp/protocol.c:1672 [inline] #1: ffff888048d70130 (k-sk_lock-AF_INET6){+.+.}-{0:0}, at: mptcp_sendmsg+0x1296/0x1910 net/mptcp/protocol.c:1715 #2: ffff888048d70130 (k-sk_lock-AF_INET6/1){+.+.}-{0:0}, at: __mptcp_close_ssk+0x19e/0x780 net/mptcp/protocol.c:2322 3 locks held by kworker/0:13/10808: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260 #1: ffffc90008a17da8 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264 #2: ffffffff8e0be368 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xf/0x70 net/core/link_watch.c:277 2 locks held by syz-executor.1/11585: #0: ffffffff8e0aa6d0 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2f8/0x6b0 net/core/net_namespace.c:479 #1: ffffffff8e0be368 (rtnl_mutex){+.+.}-{3:3}, at: cangw_pernet_exit_batch+0x15/0xa0 net/can/gw.c:1250 2 locks held by syz-executor.2/11598: #0: ffffffff8e0be368 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:75 [inline] #0: ffffffff8e0be368 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3e9/0xca0 net/core/rtnetlink.c:6138 #1: ffffffff8c79c478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline] #1: ffffffff8c79c478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x5df/0x780 kernel/rcu/tree_exp.h:946 1 lock held by syz-executor.2/11611: #0: ffffffff8e0be368 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:75 [inline] #0: ffffffff8e0be368 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3e9/0xca0 net/core/rtnetlink.c:6138 2 locks held by syz-executor.0/11609: #0: ffffffff8e0aa6d0 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2f8/0x6b0 net/core/net_namespace.c:479 #1: ffffffff8e0be368 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:805 [inline] #1: ffffffff8e0be368 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x218/0x470 net/smc/smc_pnet.c:874 2 locks held by syz-executor.5/11607: #0: ffffffff8e0aa6d0 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2f8/0x6b0 net/core/net_namespace.c:479 #1: ffffffff8e0be368 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:805 [inline] #1: ffffffff8e0be368 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x218/0x470 net/smc/smc_pnet.c:874 2 locks held by syz-executor.5/11613: #0: ffffffff8e0aa6d0 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2f8/0x6b0 net/core/net_namespace.c:479 #1: ffffffff8e0be368 (rtnl_mutex){+.+.}-{3:3}, at: tc_action_net_exit include/net/act_api.h:172 [inline] #1: ffffffff8e0be368 (rtnl_mutex){+.+.}-{3:3}, at: gate_exit_net+0x26/0x370 net/sched/act_gate.c:656 2 locks held by syz-executor.3/11621: #0: ffffffff8e0aa6d0 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2f8/0x6b0 net/core/net_namespace.c:479 #1: ffffffff8e0be368 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:805 [inline] #1: ffffffff8e0be368 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x218/0x470 net/smc/smc_pnet.c:874 2 locks held by syz-executor.3/11630: #0: ffffffff8e0aa6d0 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2f8/0x6b0 net/core/net_namespace.c:479 #1: ffffffff8e0be368 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:805 [inline] #1: ffffffff8e0be368 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x218/0x470 net/smc/smc_pnet.c:874 1 lock held by syz-executor.3/11634: #0: ffffffff8e0be368 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:75 [inline] #0: ffffffff8e0be368 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3e9/0xca0 net/core/rtnetlink.c:6138 2 locks held by syz-executor.4/11626: #0: ffffffff8e0aa6d0 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2f8/0x6b0 net/core/net_namespace.c:479 #1: ffffffff8e0be368 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:805 [inline] #1: ffffffff8e0be368 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x218/0x470 net/smc/smc_pnet.c:874 2 locks held by syz-executor.4/11632: #0: ffffffff8e0aa6d0 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2f8/0x6b0 net/core/net_namespace.c:479 #1: ffffffff8e0be368 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:805 [inline] #1: ffffffff8e0be368 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x218/0x470 net/smc/smc_pnet.c:874 1 lock held by syz-executor.4/11635: #0: ffffffff8e0be368 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:75 [inline] #0: ffffffff8e0be368 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3e9/0xca0 net/core/rtnetlink.c:6138 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.1.0-syzkaller-11782-g1f47510ed50a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x24/0x18a lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x333/0x3c0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline] watchdog+0xc75/0xfc0 kernel/hung_task.c:377 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 9 Comm: kworker/u4:0 Not tainted 6.1.0-syzkaller-11782-g1f47510ed50a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: bat_events batadv_nc_worker RIP: 0010:cpumask_check include/linux/cpumask.h:117 [inline] RIP: 0010:cpumask_test_cpu include/linux/cpumask.h:444 [inline] RIP: 0010:cpu_online include/linux/cpumask.h:1030 [inline] RIP: 0010:trace_lock_acquire include/trace/events/lock.h:24 [inline] RIP: 0010:lock_acquire+0xb7/0x630 kernel/locking/lockdep.c:5639 Code: c7 c2 80 dd 72 8e 65 8b 15 22 b4 9f 7e 48 b8 00 00 00 00 00 fc ff df 4c 89 d1 41 83 e2 07 48 c1 e9 03 41 83 c2 03 0f b6 04 01 <41> 38 c2 7c 08 84 c0 0f 85 b5 04 00 00 3b 15 66 e5 0e 0d 0f 83 62 RSP: 0018:ffffc900000e7b90 EFLAGS: 00000206 RAX: 0000000000000000 RBX: 1ffff9200001cf75 RCX: 1ffffffff1ce5bb0 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8c7917c0 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000000 R12: 0000000000000002 R13: 0000000000000000 R14: ffffffff8c7917c0 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555556d77848 CR3: 000000000c48e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_lock_acquire include/linux/rcupdate.h:325 [inline] rcu_read_lock include/linux/rcupdate.h:764 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline] batadv_nc_worker+0x131/0xfa0 net/batman-adv/network-coding.c:719 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 worker_thread+0x669/0x1090 kernel/workqueue.c:2436 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308