INFO: task syz.0.163:7463 blocked for more than 149 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.163 state:D stack:0 pid:7463 tgid:7457 ppid:6552 task_flags:0x400040 flags:0x00000001 Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5325 [inline] __schedule+0x13b0/0x2864 kernel/sched/core.c:6929 __schedule_loop kernel/sched/core.c:7011 [inline] schedule+0xb4/0x230 kernel/sched/core.c:7026 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7083 __mutex_lock_common+0xd04/0x2678 kernel/locking/mutex.c:676 __mutex_lock kernel/locking/mutex.c:760 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:812 tty_lock+0x7c/0xd0 drivers/tty/tty_mutex.c:18 tty_set_ldisc+0x60/0x4dc drivers/tty/tty_ldisc.c:528 tiocsetd+0xe4/0x128 drivers/tty/tty_io.c:2429 tty_ioctl+0xb54/0xd8c drivers/tty/tty_io.c:2728 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:583 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Showing all locks held in the system: 1 lock held by kthreadd/2: 3 locks held by kworker/0:0/9: #0: ffff0000c0029948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3237 #1: ffff800097a57be0 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3237 #2: ffff800092888228 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 2 locks held by kworker/u8:0/12: 3 locks held by kworker/u8:1/15: 2 locks held by kworker/1:0/24: 1 lock held by khungtaskd/32: #0: ffff80008f79b760 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 1 lock held by khugepaged/37: 3 locks held by kworker/u8:2/41: 6 locks held by kworker/u8:3/42: #0: ffff0000c1843148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3237 #1: ffff8000990f7be0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3237 #2: ffff80009287b3f0 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xf4/0x6dc net/core/net_namespace.c:669 #3: ffff0000d4bec0e8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:914 [inline] #3: ffff0000d4bec0e8 (&dev->mutex){....}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:108 [inline] #3: ffff0000d4bec0e8 (&dev->mutex){....}-{4:4}, at: devlink_pernet_pre_exit+0xe4/0x380 net/devlink/core.c:506 #4: ffff0000d4bed250 (&devlink->lock_key#4){+.+.}-{4:4}, at: devl_lock net/devlink/core.c:276 [inline] #4: ffff0000d4bed250 (&devlink->lock_key#4){+.+.}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:109 [inline] #4: ffff0000d4bed250 (&devlink->lock_key#4){+.+.}-{4:4}, at: devlink_pernet_pre_exit+0xf0/0x380 net/devlink/core.c:506 #5: ffff800092888228 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 1 lock held by pr/ttyAMA-1/43: 3 locks held by kworker/u8:4/187: 3 locks held by kworker/u8:5/1608: 4 locks held by kworker/0:2/1857: 3 locks held by kworker/u8:6/2020: 3 locks held by kworker/u8:7/2718: 3 locks held by kworker/u8:8/2759: 3 locks held by kworker/u8:9/2808: 3 locks held by kworker/R-ipv6_/4237: #0: ffff0000d3a18948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3237 #1: ffff80009f9e7bc0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3237 #2: ffff800092888228 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 3 locks held by kworker/u8:10/4846: 1 lock held by klogd/6183: 3 locks held by dhcpcd/6249: 2 locks held by getty/6335: #0: ffff0000d3cb30a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009bb5b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa4 drivers/tty/n_tty.c:2222 4 locks held by syz-executor/6539: 4 locks held by kworker/1:2/6553: 3 locks held by kworker/1:3/6554: 1 lock held by syz-executor/6557: 2 locks held by kworker/1:4/6569: 4 locks held by kworker/0:4/6606: #0: ffff0000db420d48 ((wq_completion)wg-kex-wg1#4){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3237 #1: ffff8000a4ba7be0 ((work_completion)(&({ do { const void *__vpp_verify = (typeof((worker) + 0))((void *)0); (void)__vpp_verify; } while (0); ({ unsigned long __ptr; __ptr = (unsigned long) ((__typeof_unqual__(*((worker))) *)(( unsigned long)((worker)))); (typeof((__typeof_unqual__(*((worker))) *)(( unsigned long)((worker))))) (__ptr + (((__per_cpu_offset[(cpu)])))); }); })->work)){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3237 #2: ffff0000dbca9348 (&wg->static_identity.lock){++++}-{4:4}, at: wg_noise_handshake_consume_response+0x180/0x954 drivers/net/wireguard/noise.c:742 #3: ffff0000d57adc60 (&handshake->lock){++++}-{4:4}, at: wg_noise_handshake_consume_response+0x20c/0x954 drivers/net/wireguard/noise.c:753 1 lock held by udevd/6742: 1 lock held by udevd/7194: #0: ffff0000c16f4138 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:995 [inline] #0: ffff0000c16f4138 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_read_iter+0x2a0/0x3dc block/fops.c:858 1 lock held by syz.1.158/7452: #0: ffff800092888228 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 4 locks held by syz.0.163/7459: 1 lock held by syz.0.163/7463: #0: ffff0000daef91c0 (&tty->legacy_mutex){+.+.}-{4:4}, at: tty_lock+0x7c/0xd0 drivers/tty/tty_mutex.c:18 4 locks held by segctord/7462: 3 locks held by kworker/u8:11/7465: 3 locks held by kworker/u8:12/7467: #0: ffff0000c0032148 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3237 #1: ffff80009f5d7be0 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3237 #2: ffff800092888228 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 4 locks held by kworker/u8:13/7468: 2 locks held by syz-executor/7469: 3 locks held by kworker/u8:14/7470: 2 locks held by kworker/u8:15/7471: 1 lock held by kworker/u8:16/7472: =============================================