INFO: task kworker/1:7:6051 blocked for more than 144 seconds. Not tainted 6.3.0-rc1-syzkaller-gfe15c26ee26e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:7 state:D stack:0 pid:6051 ppid:2 flags:0x00000008 Workqueue: vsock-loopback vsock_loopback_work Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5304 [inline] __schedule+0x1130/0x1fd0 kernel/sched/core.c:6622 schedule+0xc4/0x170 kernel/sched/core.c:6698 __lock_sock+0x168/0x2d4 net/core/sock.c:2897 lock_sock_nested+0xc0/0x138 net/core/sock.c:3478 lock_sock include/net/sock.h:1697 [inline] virtio_transport_recv_pkt+0x778/0x4ce4 net/vmw_vsock/virtio_transport_common.c:1304 vsock_loopback_work+0x328/0x430 net/vmw_vsock/vsock_loopback.c:122 process_one_work+0x868/0x16f4 kernel/workqueue.c:2390 worker_thread+0x8e0/0xfe8 kernel/workqueue.c:2537 kthread+0x24c/0x2d4 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffff800015eb7c90 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:510 1 lock held by rcu_tasks_trace/13: #0: ffff800015eb8490 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:510 1 lock held by khungtaskd/28: #0: ffff800015eb7ac0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:326 1 lock held by udevd/5476: 2 locks held by getty/5627: #0: ffff0000cdc35098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80001a9f02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1210 drivers/tty/n_tty.c:2177 2 locks held by syz-executor.2/5979: #0: ffff0001b44bc818 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:539 [inline] #0: ffff0001b44bc818 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1366 [inline] #0: ffff0001b44bc818 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1653 [inline] #0: ffff0001b44bc818 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x2cc/0x1fd0 kernel/sched/core.c:6539 #1: ffff0000de8f6560 (&mm->cid_lock#2){....}-{2:2}, at: mm_cid_get+0x17c/0x384 kernel/sched/sched.h:3280 3 locks held by kworker/1:7/6051: #0: ffff0000d32e6138 ((wq_completion)vsock-loopback){+.+.}-{0:0}, at: process_one_work+0x664/0x16f4 kernel/workqueue.c:2363 #1: ffff80001e917c20 ((work_completion)(&vsock->pkt_work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x16f4 kernel/workqueue.c:2365 #2: ffff0000c56e6730 (sk_lock-AF_VSOCK){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1697 [inline] #2: ffff0000c56e6730 (sk_lock-AF_VSOCK){+.+.}-{0:0}, at: virtio_transport_recv_pkt+0x778/0x4ce4 net/vmw_vsock/virtio_transport_common.c:1304 3 locks held by kworker/1:8/6053: #0: ffff0000c0020d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x664/0x16f4 kernel/workqueue.c:2363 #1: ffff80001e927c20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x6a8/0x16f4 kernel/workqueue.c:2365 #2: ffff800018397088 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:75 2 locks held by kworker/0:10/10608: #0: ffff0000c0021d38 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x664/0x16f4 kernel/workqueue.c:2363 #1: ffff80001e967c20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x16f4 kernel/workqueue.c:2365 3 locks held by kworker/u4:9/12519: 1 lock held by syz-executor.4/14638: 1 lock held by syz-executor.4/14737: #0: ffff800015ebcf38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline] #0: ffff800015ebcf38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x37c/0x728 kernel/rcu/tree_exp.h:989 2 locks held by syz-executor.5/17354: 1 lock held by syz-executor.5/17362: #0: ffff800018397088 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:75 2 locks held by syz-executor.0/17350: #0: ffff800018397088 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:75 #1: ffff800015ebcf38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline] #1: ffff800015ebcf38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x37c/0x728 kernel/rcu/tree_exp.h:989 1 lock held by syz-executor.1/17360: =============================================