INFO: task dhcpcd:3019 blocked for more than 430 seconds. Not tainted 6.9.0-rc2-syzkaller-00435-g9fe30842a90b #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:dhcpcd state:D stack:0 pid:3019 tgid:3019 ppid:3018 flags:0x00000004 Call trace: __switch_to+0x1c8/0x2a0 arch/arm64/kernel/process.c:553 context_switch kernel/sched/core.c:5409 [inline] __schedule+0xad8/0x2b14 kernel/sched/core.c:6746 __schedule_loop kernel/sched/core.c:6823 [inline] schedule+0xd0/0x304 kernel/sched/core.c:6838 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6895 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x4e8/0x840 kernel/locking/mutex.c:752 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:804 netlink_dump+0xa18/0x1008 net/netlink/af_netlink.c:2268 netlink_recvmsg+0x698/0x9c0 net/netlink/af_netlink.c:1987 sock_recvmsg_nosec net/socket.c:1046 [inline] sock_recvmsg+0xdc/0x17c net/socket.c:1068 ____sys_recvmsg+0x1ac/0x674 net/socket.c:2803 ___sys_recvmsg+0xe4/0x154 net/socket.c:2845 __sys_recvmsg+0xdc/0x170 net/socket.c:2875 __do_sys_recvmsg net/socket.c:2885 [inline] __se_sys_recvmsg net/socket.c:2882 [inline] __arm64_sys_recvmsg+0x70/0xa0 net/socket.c:2882 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x6c/0x258 arch/arm64/kernel/syscall.c:48 el0_svc_common.constprop.0+0xac/0x230 arch/arm64/kernel/syscall.c:133 do_el0_svc+0x40/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x50/0x180 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 Showing all locks held in the system: 9 locks held by kworker/u8:1/27: 1 lock held by khungtaskd/30: #0: ffff80008692c4a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x44/0x2d4 kernel/locking/lockdep.c:6608 3 locks held by kworker/u8:9/2033: #0: ffff0000131b3148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x6ac/0x1898 kernel/workqueue.c:3229 #1: ffff80008c247ce0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6d4/0x1898 kernel/workqueue.c:3229 #2: ffff800087b85468 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x1c/0x28 net/core/rtnetlink.c:79 1 lock held by jbd2/vda-8/2955: 2 locks held by dhcpcd/3019: #0: ffff00001415d678 (nlk_cb_mutex-ROUTE){+.+.}-{3:3}, at: netlink_dump+0x9c0/0x1008 net/netlink/af_netlink.c:2209 #1: ffff800087b85468 (rtnl_mutex){+.+.}-{3:3}, at: netlink_dump+0xa18/0x1008 net/netlink/af_netlink.c:2268 2 locks held by getty/3109: #0: ffff00000ee7a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80008971d2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x93c/0xe9c drivers/tty/n_tty.c:2201 3 locks held by kworker/1:3/8073: #0: ffff000009c28948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x6ac/0x1898 kernel/workqueue.c:3229 #1: ffff80008ccc7ce0 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x6d4/0x1898 kernel/workqueue.c:3229 #2: ffff800087b85468 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x1c/0x28 net/core/rtnetlink.c:79 2 locks held by kworker/u8:5/12142: 1 lock held by syz-executor.0/12166: #0: ffff800087b85468 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffff800087b85468 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x2a8/0x8bc net/core/rtnetlink.c:6592 1 lock held by syz-executor.0/12187: #0: ffff800087b85468 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffff800087b85468 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x2a8/0x8bc net/core/rtnetlink.c:6592 1 lock held by syz-executor.0/12208: #0: ffff800087b85468 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffff800087b85468 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x2a8/0x8bc net/core/rtnetlink.c:6592 2 locks held by syz-executor.1/12215: #0: ffff00001419e420 (sb_writers#4){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1664 [inline] #0: ffff00001419e420 (sb_writers#4){.+.+}-{0:0}, at: sb_start_write include/linux/fs.h:1800 [inline] #0: ffff00001419e420 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3c/0xb0 fs/namespace.c:409 #1: ffff00001d800400 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:830 [inline] #1: ffff00001d800400 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: filename_create+0x15c/0x3b4 fs/namei.c:3892 =============================================