INFO: task syz-executor.2:9157 blocked for more than 143 seconds. Not tainted 6.10.0-rc2-syzkaller-00269-g96e09b8f8166 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:26624 pid:9157 tgid:9152 ppid:5106 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5408 [inline] __schedule+0xf15/0x5d00 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6837 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 netlink_dump+0x58c/0xe00 net/netlink/af_netlink.c:2336 __netlink_dump_start+0x6d7/0x9b0 net/netlink/af_netlink.c:2454 netlink_dump_start include/linux/netlink.h:340 [inline] rtnetlink_dump_start net/core/rtnetlink.c:6524 [inline] rtnetlink_rcv_msg+0xb40/0xea0 net/core/rtnetlink.c:6591 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2564 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] netlink_unicast+0x542/0x820 net/netlink/af_netlink.c:1361 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1905 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0xab5/0xc90 net/socket.c:2585 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2639 __sys_sendmsg+0x117/0x1f0 net/socket.c:2668 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0e05e7cf69 RSP: 002b:00007f0e06be20c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f0e05fb4120 RCX: 00007f0e05e7cf69 RDX: 0000000000000000 RSI: 00000000200002c0 RDI: 0000000000000007 RBP: 00007f0e05eda6fe R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f0e05fb4120 R15: 00007ffca86f7468 Showing all locks held in the system: 3 locks held by kworker/0:0/8: #0: ffff888015480948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x12bf/0x1b60 kernel/workqueue.c:3206 #1: ffffc900000d7d80 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x957/0x1b60 kernel/workqueue.c:3207 #2: ffffffff8f74b7a8 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:104 1 lock held by khungtaskd/30: #0: ffffffff8dbb1920 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #0: ffffffff8dbb1920 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline] #0: ffffffff8dbb1920 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614 3 locks held by kworker/u8:14/2934: #0: ffff88802a464148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x12bf/0x1b60 kernel/workqueue.c:3206 #1: ffffc9000a4a7d80 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x957/0x1b60 kernel/workqueue.c:3207 #2: ffffffff8f74b7a8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4733 2 locks held by getty/4836: #0: ffff88802afc50a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2201 2 locks held by syz-fuzzer/5090: 3 locks held by kworker/1:5/5189: #0: ffff888015481948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x12bf/0x1b60 kernel/workqueue.c:3206 #1: ffffc900032cfd80 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x957/0x1b60 kernel/workqueue.c:3207 #2: ffffffff8f74b7a8 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x7d/0x10e0 net/wireless/reg.c:2478 1 lock held by syz-executor.0/9141: 2 locks held by syz-executor.2/9157: #0: ffff88805d35e678 (nlk_cb_mutex-ROUTE){+.+.}-{3:3}, at: __netlink_dump_start+0x154/0x9b0 net/netlink/af_netlink.c:2418 #1: ffffffff8f74b7a8 (rtnl_mutex){+.+.}-{3:3}, at: netlink_dump+0x58c/0xe00 net/netlink/af_netlink.c:2336 2 locks held by syz-executor.1/9186: #0: ffff8880210b4678 (nlk_cb_mutex-ROUTE){+.+.}-{3:3}, at: __netlink_dump_start+0x154/0x9b0 net/netlink/af_netlink.c:2418 #1: ffffffff8f74b7a8 (rtnl_mutex){+.+.}-{3:3}, at: netlink_dump+0x58c/0xe00 net/netlink/af_netlink.c:2336 2 locks held by syz-executor.4/9208: #0: ffffffff8f7e9950 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218 #1: ffffffff8f74b7a8 (rtnl_mutex){+.+.}-{3:3}, at: nl80211_pre_doit+0xb4/0xb10 net/wireless/nl80211.c:16405 2 locks held by syz-executor.3/9240: #0: ffffffff8f7e9950 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218 #1: ffffffff8f74b7a8 (rtnl_mutex){+.+.}-{3:3}, at: nl80211_pre_doit+0xb4/0xb10 net/wireless/nl80211.c:16405 1 lock held by syz-executor.0/9242: #0: ffffffff8f74b7a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f74b7a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6632 1 lock held by syz-executor.2/9245: #0: ffffffff8f74b7a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f74b7a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6632 1 lock held by syz-executor.1/9248: #0: ffffffff8f74b7a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f74b7a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6632 1 lock held by syz-executor.4/9251: #0: ffffffff8f74b7a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f74b7a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6632 1 lock held by syz-executor.3/9254: #0: ffffffff8f74b7a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f74b7a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6632 1 l