BUG: sleeping function called from invalid context at kernel/printk/printk.c:2646 in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 8, name: kworker/0:0 preempt_count: 1, expected: 0 RCU nest depth: 0, expected: 0 3 locks held by kworker/0:0/8: #0: ffff0000c0020d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x560/0x1204 kernel/workqueue.c:2603 #1: ffff800092d37c20 ((work_completion)(&gsm->tx_work)){+.+.}-{0:0}, at: process_one_work+0x5a0/0x1204 kernel/workqueue.c:2605 #2: ffff0000c3edd3e0 (&gsm->tx_lock){....}-{2:2}, at: gsmld_write_task+0x44/0x89c drivers/tty/n_gsm.c:3493 irq event stamp: 5168 hardirqs last enabled at (5167): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (5167): [] _raw_spin_unlock_irq+0x30/0x80 kernel/locking/spinlock.c:202 hardirqs last disabled at (5168): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (5168): [] _raw_spin_lock_irqsave+0x2c/0x7c kernel/locking/spinlock.c:162 softirqs last enabled at (5160): [] softirq_handle_end kernel/softirq.c:399 [inline] softirqs last enabled at (5160): [] __do_softirq+0xac0/0xd54 kernel/softirq.c:582 softirqs last disabled at (5133): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 Preemption disabled at: [] gsmld_write_task+0x44/0x89c drivers/tty/n_gsm.c:3493 CPU: 0 PID: 8 Comm: kworker/0:0 Not tainted 6.6.0-rc7-syzkaller-00089-g8de1e7afcc1c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 Workqueue: events gsmld_write_task Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 dump_stack+0x1c/0x28 lib/dump_stack.c:113 __might_resched+0x374/0x4d0 kernel/sched/core.c:10187 __might_sleep+0x90/0xe4 kernel/sched/core.c:10116 console_lock+0x38/0x204 kernel/printk/printk.c:2646 do_con_write+0x14c/0x5b14 drivers/tty/vt/vt.c:2862 con_write+0x34/0x58 drivers/tty/vt/vt.c:3245 gsmld_output drivers/tty/n_gsm.c:3460 [inline] gsm_send_packet+0x5d8/0x7b0 drivers/tty/n_gsm.c:963 gsm_data_kick drivers/tty/n_gsm.c:1025 [inline] gsmld_write_task+0x130/0x89c drivers/tty/n_gsm.c:3495 process_one_work+0x694/0x1204 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x938/0xef4 kernel/workqueue.c:2784 kthread+0x288/0x310 kernel/kthread.c:388 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:857 BUG: sleeping function called from invalid context at kernel/printk/printk.c:2646 in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 8, name: kworker/0:0 preempt_count: 1, expected: 0 RCU nest depth: 0, expected: 0 INFO: lockdep is turned off. irq event stamp: 6054 hardirqs last enabled at (6053): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (6053): [] _raw_spin_unlock_irq+0x30/0x80 kernel/locking/spinlock.c:202 hardirqs last disabled at (6054): [] __schedule+0x2b4/0x23b4 kernel/sched/core.c:6594 softirqs last enabled at (6050): [] softirq_handle_end kernel/softirq.c:399 [inline] softirqs last enabled at (6050): [] __do_softirq+0xac0/0xd54 kernel/softirq.c:582 softirqs last disabled at (6027): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 Preemption disabled at: [] gsmld_write_task+0x44/0x89c drivers/tty/n_gsm.c:3493 CPU: 0 PID: 8 Comm: kworker/0:0 Tainted: G W 6.6.0-rc7-syzkaller-00089-g8de1e7afcc1c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 Workqueue: events gsmld_write_task Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 dump_stack+0x1c/0x28 lib/dump_stack.c:113 __might_resched+0x374/0x4d0 kernel/sched/core.c:10187 __might_sleep+0x90/0xe4 kernel/sched/core.c:10116 console_lock+0x38/0x204 kernel/printk/printk.c:2646 do_con_write+0x14c/0x5b14 drivers/tty/vt/vt.c:2862 con_write+0x34/0x58 drivers/tty/vt/vt.c:3245 gsmld_output drivers/tty/n_gsm.c:3460 [inline] gsm_send_packet+0x5d8/0x7b0 drivers/tty/n_gsm.c:963 gsm_data_kick drivers/tty/n_gsm.c:1025 [inline] gsmld_write_task+0x130/0x89c drivers/tty/n_gsm.c:3495 process_one_work+0x694/0x1204 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x938/0xef4 kernel/workqueue.c:2784 kthread+0x288/0x310 kernel/kthread.c:388 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:857