INFO: task syz-executor.0:9737 blocked for more than 143 seconds. Not tainted 6.4.0-syzkaller-10098-g995b406c7e97 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:29128 pid:9737 ppid:5024 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5381 [inline] __schedule+0x1873/0x48f0 kernel/sched/core.c:6710 schedule+0xc3/0x180 kernel/sched/core.c:6786 schedule_timeout+0xb0/0x310 kernel/time/timer.c:2143 do_wait_for_common+0x449/0x5f0 kernel/sched/completion.c:85 __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x4a/0x60 kernel/sched/completion.c:138 init_module_from_file kernel/module/main.c:3125 [inline] __do_sys_finit_module kernel/module/main.c:3171 [inline] __se_sys_finit_module+0x48d/0x8d0 kernel/module/main.c:3154 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fb122c8c389 RSP: 002b:00007fb123a24168 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 RAX: ffffffffffffffda RBX: 00007fb122dac050 RCX: 00007fb122c8c389 RDX: 0000000000000001 RSI: 0000000020000000 RDI: 0000000000000004 RBP: 00007fb122cd7493 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffe8845e5f R14: 00007fb123a24300 R15: 0000000000022000 Showing all locks held in the system: 2 locks held by kworker/0:0/7: #0: ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7e3/0x12c0 kernel/workqueue.c:2569 #1: ffffc900000c7d20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x82b/0x12c0 kernel/workqueue.c:2571 1 lock held by rcu_tasks_kthre/13: #0: ffffffff8d326af0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:522 1 lock held by rcu_tasks_trace/14: #0: ffffffff8d326eb0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:522 1 lock held by khungtaskd/28: #0: ffffffff8d326920 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 2 locks held by kworker/0:3/4550: #0: ffff888012872538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x7e3/0x12c0 kernel/workqueue.c:2569 #1: ffffc9000337fd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x82b/0x12c0 kernel/workqueue.c:2571 2 locks held by getty/4748: #0: ffff88814aa87098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900015b02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b1/0x1db0 drivers/tty/n_tty.c:2176 2 locks held by syz-executor.4/11025: #0: ffff888084cf13e8 (&wg->device_update_lock){+.+.}-{3:3}, at: wg_destruct+0x110/0x300 drivers/net/wireguard/device.c:250 #1: ffffffff8d32bfb8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline] #1: ffffffff8d32bfb8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x46c/0x890 kernel/rcu/tree_exp.h:992 1 lock held by syz-executor.3/11021: #0: ffff888083b25c10 (&sb->s_type->i_mutex_key#9){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #0: ffff888083b25c10 (&sb->s_type->i_mutex_key#9){+.+.}-{3:3}, at: __sock_release net/socket.c:653 [inline] #0: ffff888083b25c10 (&sb->s_type->i_mutex_key#9){+.+.}-{3:3}, at: sock_close+0x9c/0x230 net/socket.c:1386 3 locks held by syz-executor.0/11051: #0: ffff8880879b6810 (&sb->s_type->i_mutex_key#9){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #0: ffff8880879b6810 (&sb->s_type->i_mutex_key#9){+.+.}-{3:3}, at: __sock_release net/socket.c:653 [inline] #0: ffff8880879b6810 (&sb->s_type->i_mutex_key#9){+.+.}-{3:3}, at: sock_close+0x9c/0x230 net/socket.c:1386 #1: ffff888076746130 (sk_lock-AF_CAN){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1708 [inline] #1: ffff888076746130 (sk_lock-AF_CAN){+.+.}-{0:0}, at: bcm_release+0x1e3/0x880 net/can/bcm.c:1527 #2: ffffffff8d32bfb8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline] #2: ffffffff8d32bfb8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x46c/0x890 kernel/rcu/tree_exp.h:992 3 locks held by syz-executor.5/11057: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.4.0-syzkaller-10098-g995b406c7e97 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x187/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xec2/0xf00 kernel/hung_task.c:379 kthread+0x2b8/0x350 kernel/kthread.c:389 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline] NMI backtrace for cpu 1 skipped: idling at __intel_idle_hlt drivers/idle/intel_idle.c:205 [inline] NMI backtrace for cpu 1 skipped: idling at intel_idle_hlt+0x15/0x20 drivers/idle/intel_idle.c:224