INFO: task syz-executor.1:4236 blocked for more than 430 seconds. Not tainted 6.10.0-rc3-syzkaller-g83a7eefedc9b #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:0 pid:4236 tgid:4235 ppid:3061 flags:0x00000004 Call Trace: [] context_switch kernel/sched/core.c:5408 [inline] [] __schedule+0xd5c/0x3486 kernel/sched/core.c:6745 [] __schedule_loop kernel/sched/core.c:6822 [inline] [] schedule+0xc4/0x324 kernel/sched/core.c:6837 [] schedule_preempt_disabled+0x16/0x28 kernel/sched/core.c:6894 [] __mutex_lock_common kernel/locking/mutex.c:684 [inline] [] __mutex_lock+0x86a/0x1022 kernel/locking/mutex.c:752 [] mutex_lock_nested+0x14/0x1c kernel/locking/mutex.c:804 [] rtnl_lock net/core/rtnetlink.c:79 [inline] [] rtnetlink_rcv_msg+0x3e2/0xdb2 net/core/rtnetlink.c:6632 [] netlink_rcv_skb+0x216/0x3dc net/netlink/af_netlink.c:2564 [] rtnetlink_rcv+0x26/0x30 net/core/rtnetlink.c:6653 [] netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] [] netlink_unicast+0x508/0x862 net/netlink/af_netlink.c:1361 [] netlink_sendmsg+0x864/0xdc2 net/netlink/af_netlink.c:1905 [] sock_sendmsg_nosec net/socket.c:730 [inline] [] __sock_sendmsg+0xcc/0x162 net/socket.c:745 [] ____sys_sendmsg+0x5ce/0x79e net/socket.c:2585 [] ___sys_sendmsg+0x144/0x1e6 net/socket.c:2639 [] __sys_sendmsg+0x130/0x1f0 net/socket.c:2668 [] __do_sys_sendmsg net/socket.c:2677 [inline] [] __se_sys_sendmsg net/socket.c:2675 [inline] [] __riscv_sys_sendmsg+0x70/0xa2 net/socket.c:2675 [] syscall_handler+0x94/0x118 arch/riscv/include/asm/syscall.h:90 [] do_trap_ecall_u+0x14c/0x214 arch/riscv/kernel/traps.c:330 [] ret_from_exception+0x0/0x64 arch/riscv/kernel/entry.S:112 Showing all locks held in the system: 3 locks held by kworker/u8:0/11: #0: ff6000000c7c9948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x824/0x1d5c kernel/workqueue.c:3206 #1: ff20000000063c90 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x850/0x1d5c kernel/workqueue.c:3206 #2: ffffffff88e5d168 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x22/0x2a net/core/rtnetlink.c:79 1 lock held by khungtaskd/36: #0: ffffffff87bc3f00 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x68/0x2d6 kernel/locking/lockdep.c:6610 1 lock held by syslogd/2849: 1 lock held by dhcpcd/2898: #0: ffffffff88e5d168 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff88e5d168 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3e2/0xdb2 net/core/rtnetlink.c:6632 2 locks held by getty/3005: #0: ff600000175790a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3a/0x46 drivers/tty/tty_ldsem.c:340 #1: ff20000000e032f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xd6a/0x1288 drivers/tty/n_tty.c:2201 1 lock held by sshd/3036: 2 locks held by syz-fuzzer/3045: 3 locks held by kworker/1:2/3057: 3 locks held by kworker/0:3/3689: 2 locks held by syz-executor.0/4230: 1 lock held by syz-executor.1/4236: #0: ffffffff88e5d168 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff88e5d168 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3e2/0xdb2 net/core/rtnetlink.c:6632 1 lock held by syz-executor.0/4238: #0: ffffffff88e5d168 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff88e5d168 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3e2/0xdb2 net/core/rtnetlink.c:6632 1 lock held by syz-executor.1/4242: #0: ffffffff88e5d168 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff88e5d168 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3e2/0xdb2 net/core/rtnetlink.c:6632 1 lock held by syz-executor.0/4248: #0: ffffffff88e5d168 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff88e5d168 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3e2/0xdb2 net/core/rtnetlink.c:6632 2 locks held by syz-executor.1/4252: 1 lock held by syz-executor.1/4253: #0: ffffffff88e5d168 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff88e5d168 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3e2/0xdb2 net/core/rtnetlink.c:6632 2 locks held by syz-executor.0/4256: =============================================