INFO: task kworker/1:4:12625 blocked for more than 430 seconds. Not tainted 6.5.0-rc1-syzkaller-00016-gd2402048bc8a #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:4 state:D stack:0 pid:12625 ppid:2 flags:0x00000000 Workqueue: ipv6_addrconf addrconf_verify_work Call Trace: [] context_switch kernel/sched/core.c:5381 [inline] [] __schedule+0x794/0x187c kernel/sched/core.c:6710 [] schedule+0x78/0xfe kernel/sched/core.c:6786 [] schedule_preempt_disabled+0x16/0x28 kernel/sched/core.c:6845 [] __mutex_lock_common kernel/locking/mutex.c:679 [inline] [] __mutex_lock+0x66a/0xa56 kernel/locking/mutex.c:747 [] mutex_lock_nested+0x14/0x1c kernel/locking/mutex.c:799 [] rtnl_lock+0x22/0x2a net/core/rtnetlink.c:78 [] addrconf_verify_work+0x1c/0x3c net/ipv6/addrconf.c:4630 [] process_one_work+0x6e6/0xe0a kernel/workqueue.c:2597 [] worker_thread+0xba/0x898 kernel/workqueue.c:2748 [] kthread+0x1bc/0x22c kernel/kthread.c:389 [] ret_from_fork+0xa/0x1c arch/riscv/kernel/entry.S:264 INFO: task syz-executor.0:14876 blocked for more than 430 seconds. Not tainted 6.5.0-rc1-syzkaller-00016-gd2402048bc8a #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:0 pid:14876 ppid:3059 flags:0x00000004 Call Trace: [] context_switch kernel/sched/core.c:5381 [inline] [] __schedule+0x794/0x187c kernel/sched/core.c:6710 [] schedule+0x78/0xfe kernel/sched/core.c:6786 [] schedule_preempt_disabled+0x16/0x28 kernel/sched/core.c:6845 [] __mutex_lock_common kernel/locking/mutex.c:679 [inline] [] __mutex_lock+0x66a/0xa56 kernel/locking/mutex.c:747 [] mutex_lock_nested+0x14/0x1c kernel/locking/mutex.c:799 [] __netlink_dump_start+0xf4/0x4fe net/netlink/af_netlink.c:2338 [] netlink_dump_start include/linux/netlink.h:330 [inline] [] rtnetlink_rcv_msg+0x62e/0xb10 net/core/rtnetlink.c:6380 [] netlink_rcv_skb+0xfc/0x2ac net/netlink/af_netlink.c:2549 [] rtnetlink_rcv+0x26/0x30 net/core/rtnetlink.c:6442 [] netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] [] netlink_unicast+0x40a/0x68a net/netlink/af_netlink.c:1365 [] netlink_sendmsg+0x512/0x9da net/netlink/af_netlink.c:1914 [] sock_sendmsg_nosec net/socket.c:725 [inline] [] sock_sendmsg+0xa0/0xf2 net/socket.c:748 [] sock_write_iter+0x1ce/0x288 net/socket.c:1129 [] call_write_iter include/linux/fs.h:1871 [inline] [] new_sync_write fs/read_write.c:491 [inline] [] vfs_write+0x3c8/0x5cc fs/read_write.c:584 [] ksys_write+0x1c2/0x226 fs/read_write.c:637 [] __do_sys_write fs/read_write.c:649 [inline] [] sys_write+0x28/0x36 fs/read_write.c:646 [] syscall_handler+0xfa/0x148 arch/riscv/include/asm/syscall.h:90 [] do_trap_ecall_u+0x96/0x98 arch/riscv/kernel/traps.c:310 [] ret_from_exception+0x0/0x64 arch/riscv/kernel/entry.S:102 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/13: #0: ffffffff851826f0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x32/0x740 kernel/rcu/tasks.h:522 1 lock held by rcu_tasks_trace/14: #0: ffffffff85182c30 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x32/0x740 kernel/rcu/tasks.h:522 1 lock held by khungtaskd/29: #0: ffffffff851829c0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x40/0x1f6 kernel/locking/lockdep.c:6617 1 lock held by klogd/2716: 1 lock held by dhcpcd/2760: #0: ffffffff85cb80c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:78 [inline] #0: ffffffff85cb80c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x314/0xb10 net/core/rtnetlink.c:6421 2 locks held by getty/2867: #0: ff600000147cf098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3a/0x46 drivers/tty/tty_ldsem.c:340 #1: ff2000000007d2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xb02/0xcf0 drivers/tty/n_tty.c:2187 3 locks held by kworker/0:1/11534: #0: ff60000014557138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:674 [inline] #0: ff60000014557138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:702 [inline] #0: ff60000014557138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x5a8/0xe0a kernel/workqueue.c:2567 #1: ff200000013d7cf0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:674 [inline] #1: ff200000013d7cf0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:702 [inline] #1: ff200000013d7cf0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x5a8/0xe0a kernel/workqueue.c:2567 #2: ffffffff85cb80c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x22/0x2a net/core/rtnetlink.c:78 3 locks held by kworker/1:4/12625: #0: ff60000014557138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:674 [inline] #0: ff60000014557138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:702 [inline] #0: ff60000014557138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x5a8/0xe0a kernel/workqueue.c:2567 #1: ff20000001017cf0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:674 [inline] #1: ff20000001017cf0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:702 [inline] #1: ff20000001017cf0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x5a8/0xe0a kernel/workqueue.c:2567 #2: ffffffff85cb80c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x22/0x2a net/core/rtnetlink.c:78 1 lock held by syz-executor.1/14872: #0: ffffffff85cb80c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x22/0x2a net/core/rtnetlink.c:78 1 lock held by syz-executor.0/14876: #0: ffffffff85cb80c8 (rtnl_mutex){+.+.}-{3:3}, at: __netlink_dump_start+0xf4/0x4fe net/netlink/af_netlink.c:2338 1 lock held by syz-executor.1/14881: #0: ffffffff85cb80c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:78 [inline] #0: ffffffff85cb80c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x314/0xb10 net/core/rtnetlink.c:6421 1 lock held by syz-executor.0/14884: #0: ffffffff85cb80c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:78 [inline] #0: ffffffff85cb80c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x314/0xb10 net/core/rtnetlink.c:6421 1 lock held by syz-executor.1/14891: #0: ffffffff85cb80c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:78 [inline] #0: ffffffff85cb80c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x314/0xb10 net/core/rtnetlink.c:6421 1 lock held by syz-executor.0/14894: #0: ffffffff85cb80c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:78 [inline] #0: ffffffff85cb80c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x314/0xb10 net/core/rtnetlink.c:6421 =============================================