INFO: task syz.4.4515:4468 blocked for more than 143 seconds. Not tainted 6.14.0-rc3-syzkaller-00137-g27eddbf34490 #0 Blocked by coredump. "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.4.4515 state:D stack:25776 pid:4468 tgid:4466 ppid:2897 task_flags:0x40044c flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5378 [inline] __schedule+0x190e/0x4c90 kernel/sched/core.c:6765 __schedule_loop kernel/sched/core.c:6842 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6857 schedule_timeout+0xb0/0x290 kernel/time/sleep_timeout.c:75 ___down_common kernel/locking/semaphore.c:225 [inline] __down_common+0x375/0x820 kernel/locking/semaphore.c:246 down+0x84/0xc0 kernel/locking/semaphore.c:63 console_lock+0x145/0x1b0 kernel/printk/printk.c:2833 con_shutdown+0x48/0x80 drivers/tty/vt/vt.c:3565 release_tty+0xbe/0x560 drivers/tty/tty_io.c:1589 tty_release_struct+0xbc/0xe0 drivers/tty/tty_io.c:1701 tty_release+0xd06/0x12c0 drivers/tty/tty_io.c:1861 __fput+0x3e9/0x9f0 fs/file_table.c:464 task_work_run+0x24f/0x310 kernel/task_work.c:227 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0xa2a/0x28e0 kernel/exit.c:938 do_group_exit+0x207/0x2c0 kernel/exit.c:1087 get_signal+0x168c/0x1720 kernel/signal.c:3036 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0xce/0x340 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f10f218d0a9 RSP: 002b:00007f10f30280e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f10f23a6088 RCX: 00007f10f218d0a9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f10f23a6088 RBP: 00007f10f23a6080 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f10f23a608c R13: 0000000000000000 R14: 00007f10f24cf940 R15: 00007f10f24cfa28 Showing all locks held in the system: 7 locks held by kworker/0:0/8: #0: ffff8880212fbd48 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline] #0: ffff8880212fbd48 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x98b/0x18e0 kernel/workqueue.c:3317 #1: ffffc900000d7c60 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3212 [inline] #1: ffffc900000d7c60 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x9c6/0x18e0 kernel/workqueue.c:3317 #2: ffff888028cdf190 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1030 [inline] #2: ffff888028cdf190 (&dev->mutex){....}-{4:4}, at: hub_event+0x1fe/0x5150 drivers/usb/core/hub.c:5861 #3: ffff888067c7a190 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1030 [inline] #3: ffff888067c7a190 (&dev->mutex){....}-{4:4}, at: usb_disconnect+0x103/0x950 drivers/usb/core/hub.c:2307 #4: ffff88806167e160 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1030 [inline] #4: ffff88806167e160 (&dev->mutex){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1095 [inline] #4: ffff88806167e160 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xce/0x7c0 drivers/base/dd.c:1293 #5: ffffffff8f9689e8 (input_mutex){+.+.}-{4:4}, at: class_mutex_constructor include/linux/mutex.h:201 [inline] #5: ffffffff8f9689e8 (input_mutex){+.+.}-{4:4}, at: __input_unregister_device+0x2f3/0x620 drivers/input/input.c:2221 #6: ffffffff9023aea8 (uevent_sock_mutex){+.+.}-{4:4}, at: uevent_net_broadcast_untagged lib/kobject_uevent.c:317 [inline] #6: ffffffff9023aea8 (uevent_sock_mutex){+.+.}-{4:4}, at: kobject_uevent_net_broadcast+0x280/0x580 lib/kobject_uevent.c:410 4 locks held by kworker/1:0/25: 1 lock held by khungtaskd/30: #0: ffffffff8eb38f60 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8eb38f60 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8eb38f60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6746 3 locks held by kworker/u8:3/52: 3 locks held by kworker/u8:5/1152: 4 locks held by kworker/1:3/4911: 2 locks held by syslogd/5189: 2 locks held by acpid/5192: 1 lock held by udevd/5207: 2 locks held by getty/5593: #0: ffff88814d5130a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc9000330b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x616/0x1770 drivers/tty/n_tty.c:2211 4 locks held by udevd/5842: 3 locks held by kworker/0:4/5881: #0: ffff88801b081d48 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline] #0: ffff88801b081d48 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x98b/0x18e0 kernel/workqueue.c:3317 #1: ffffc9000424fc60 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3212 [inline] #1: ffffc9000424fc60 ((reg_check_chans).work){+.+.}-{0:0}, at: process_scheduled_works+0x9c6/0x18e0 kernel/workqueue.c:3317 #2: ffffffff8fed4dc8 (rtnl_mutex){+.+.}-{4:4}, at: reg_check_chans_work+0x99/0xfb0 net/wireless/reg.c:2480 2 locks held by kworker/1:5/5891: 3 locks held by udevd/5948: 3 locks held by kworker/u8:10/5982: #0: ffff88814d39e148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline] #0: ffff88814d39e148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x98b/0x18e0 kernel/workqueue.c:3317 #1: ffffc900046dfc60 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3212 [inline] #1: ffffc900046dfc60 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9c6/0x18e0 kernel/workqueue.c:3317 #2: ffffffff8fed4dc8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:129 [inline] #2: ffffffff8fed4dc8 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_verify_work+0x19/0x30 net/ipv6/addrconf.c:4730 3 locks held by kworker/u8:11/6494: 3 locks held by kworker/u8:0/16653: 3 locks held by kworker/u8:1/16654: 2 locks held by kworker/u8:4/16655: 3 locks held by kworker/u8:7/16656: 2 locks held by kworker/u8:2/30368: 3 locks held by kworker/u8:6/30369: 3 locks held by kworker/u8:18/3018: 3 locks held by kworker/u8:19/3019: 3 locks held by kworker/u8:20/3020: 3 locks held by kworker/u8:21/3021: 3 locks held by kworker/u8:23/3023: 3 locks held by kworker/u8:26/3026: 2 locks held by kworker/u8:27/3028: 2 locks held by syz-executor/3114: 3 locks held by kworker/u8:28/3295: 3 locks held by kworker/u8:29/3296: 4 locks held by kworker/u8:30/3298: #0: ffff88801bef5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline] #0: ffff88801bef5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x98b/0x18e0 kernel/workqueue.c:3317 #1: ffffc900034a7c60 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3212 [inline] #1: ffffc900034a7c60 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x9c6/0x18e0 kernel/workqueue.c:3317 #2: ffffffff8fec8610 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0x17a/0xd60 net/core/net_namespace.c:606 #3: ffffffff8fed4dc8 (rtnl_mutex){+.+.}-{4:4}, at: mpls_net_exit+0x7d/0x2a0 net/mpls/af_mpls.c:2706 4 locks held by syz-executor/3595: 2 locks held by syz-executor/3672: 5 locks held by dhcpcd-run-hook/4448: 3 locks held by syz.6.4511/4471: #0: ffffffff8ff38ed0 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218 #1: ffffffff8fed4dc8 (rtnl_mutex){+.+.}-{4:4}, at: nl80211_set_wiphy+0x94/0x2c90 net/wireless/nl80211.c:3615 #2: ffff888070268768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6061 [inline] #2: ffff888070268768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: nl80211_set_wiphy+0x27f/0x2c90 net/wireless/nl80211.c:3649 1 lock held by syz.4.4515/4468: #0: ffffffff8f375608 (tty_mutex){+.+.}-{4:4}, at: tty_release_struct+0xb1/0xe0 drivers/tty/tty_io.c:1700 2 locks held by kworker/1:9/4475: 3 locks held by kworker/0:6/4476: ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.14.0-rc3-syzkaller-00137-g27eddbf34490 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:236 [inline] watchdog+0x1058/0x10a0 kernel/hung_task.c:399 kthread+0x7a9/0x920 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 5891 Comm: kworker/1:5 Not tainted 6.14.0-rc3-syzkaller-00137-g27eddbf34490 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Workqueue: wg-crypt-wg0 wg_packet_tx_worker RIP: 0010:lock_is_held_type+0x101/0x190 kernel/locking/lockdep.c:5924 Code: 41 83 fe ff 74 13 31 c0 f6 43 22 03 0f 95 c0 31 db 44 39 f0 0f 94 c3 eb 05 bb 01 00 00 00 48 c7 c7 a0 b6 2a 8c e8 7f 1a 00 00 ff ff ff ff 65 0f c1 05 62 48 fa 73 83 f8 01 75 44 48 c7 04 24 RSP: 0018:ffffc90000a18738 EFLAGS: 00000082 RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000080000101 RDX: 0000000000000100 RSI: ffffffff8c2ab6a0 RDI: ffffffff8c80ee00 RBP: 0000000000000002 R08: ffffffff8a9fdff2 R09: 1ffffffff2079d0e R10: dffffc0000000000 R11: ffffffff8a9fddd0 R12: 0000000000000246 R13: ffff88802c31bc00 R14: 00000000ffffffff R15: ffffffff8eb38f60 FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055def3ce6150 CR3: 000000000e938000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 00000000e00004c0 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: skb_dst include/linux/skbuff.h:1152 [inline] ip6_mc_input+0x23e/0xb70 net/ipv6/ip6_input.c:507 NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314 __netif_receive_skb_one_core net/core/dev.c:5899 [inline] __netif_receive_skb+0x1ea/0x650 net/core/dev.c:6012 process_backlog+0x662/0x15b0 net/core/dev.c:6360 __napi_poll+0xcb/0x490 net/core/dev.c:7194 napi_poll net/core/dev.c:7263 [inline] net_rx_action+0x89b/0x1240 net/core/dev.c:7385 handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561 do_softirq+0x11b/0x1e0 kernel/softirq.c:462 __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:389 wg_socket_send_skb_to_peer+0x176/0x1d0 drivers/net/wireguard/socket.c:184 wg_packet_create_data_done drivers/net/wireguard/send.c:251 [inline] wg_packet_tx_worker+0x1bf/0x810 drivers/net/wireguard/send.c:276 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0xabe/0x18e0 kernel/workqueue.c:3317 worker_thread+0x870/0xd30 kernel/workqueue.c:3398 kthread+0x7a9/0x920 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244