BUG: sleeping function called from invalid context at kernel/printk/printk.c:2659 in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 8, name: kworker/0:1 preempt_count: 1, expected: 0 RCU nest depth: 0, expected: 0 3 locks held by kworker/0:1/8: #0: ffff0000c0028948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x668/0x15d4 kernel/workqueue.c:3241 #1: ffff800093c27c20 ((work_completion)(&gsm->tx_work)){+.+.}-{0:0}, at: process_one_work+0x6b4/0x15d4 kernel/workqueue.c:3241 #2: ffff0000d34713e0 (&gsm->tx_lock){....}-{2:2}, at: gsmld_write_task+0x44/0x89c drivers/tty/n_gsm.c:3494 irq event stamp: 38300 hardirqs last enabled at (38299): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (38299): [] _raw_spin_unlock_irq+0x30/0x80 kernel/locking/spinlock.c:202 hardirqs last disabled at (38300): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (38300): [] _raw_spin_lock_irqsave+0x2c/0x7c kernel/locking/spinlock.c:162 softirqs last enabled at (38292): [] softirq_handle_end kernel/softirq.c:400 [inline] softirqs last enabled at (38292): [] handle_softirqs+0xa60/0xc34 kernel/softirq.c:582 softirqs last disabled at (38269): [] __do_softirq+0x14/0x20 kernel/softirq.c:588 Preemption disabled at: [] gsmld_write_task+0x44/0x89c drivers/tty/n_gsm.c:3494 CPU: 0 PID: 8 Comm: kworker/0:1 Not tainted 6.9.0-rc7-syzkaller-gfda5695d692c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Workqueue: events gsmld_write_task Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:317 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:324 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:114 dump_stack+0x1c/0x28 lib/dump_stack.c:123 __might_resched+0x374/0x4d0 kernel/sched/core.c:10197 __might_sleep+0x90/0xe4 kernel/sched/core.c:10126 console_lock+0x38/0x204 kernel/printk/printk.c:2659 do_con_write+0x130/0x3d28 drivers/tty/vt/vt.c:3056 con_write+0x34/0x58 drivers/tty/vt/vt.c:3434 gsmld_output drivers/tty/n_gsm.c:3461 [inline] gsm_send_packet+0x5d8/0x7b0 drivers/tty/n_gsm.c:964 gsm_data_kick drivers/tty/n_gsm.c:1026 [inline] gsmld_write_task+0x130/0x89c drivers/tty/n_gsm.c:3496 process_one_work+0x7b8/0x15d4 kernel/workqueue.c:3267 process_scheduled_works kernel/workqueue.c:3348 [inline] worker_thread+0x938/0xef4 kernel/workqueue.c:3429 kthread+0x288/0x310 kernel/kthread.c:388 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860 BUG: scheduling while atomic: kworker/0:1/8/0x00000002 3 locks held by kworker/0:1/8: #0: ffff0000c0028948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x668/0x15d4 kernel/workqueue.c:3241 #1: ffff800093c27c20 ((work_completion)(&gsm->tx_work)){+.+.}-{0:0}, at: process_one_work+0x6b4/0x15d4 kernel/workqueue.c:3241 #2: ffff0000d34713e0 (&gsm->tx_lock){+.+.}-{2:2}, at: gsmld_write_task+0x44/0x89c drivers/tty/n_gsm.c:3494 Modules linked in: Preemption disabled at: [] gsmld_write_task+0x44/0x89c drivers/tty/n_gsm.c:3494 CPU: 0 PID: 8 Comm: kworker/0:1 Tainted: G W 6.9.0-rc7-syzkaller-gfda5695d692c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Workqueue: events gsmld_write_task Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:317 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:324 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:114 dump_stack+0x1c/0x28 lib/dump_stack.c:123 __schedule_bug+0x10c/0x19c kernel/sched/core.c:5952 schedule_debug kernel/sched/core.c:5979 [inline] __schedule+0x1568/0x24e8 kernel/sched/core.c:6629 __schedule_loop kernel/sched/core.c:6823 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6838 schedule_timeout+0xb8/0x348 kernel/time/timer.c:2558 ___down_common+0x2a4/0x4f0 kernel/locking/semaphore.c:225 __down_common+0xc4/0x47c kernel/locking/semaphore.c:246 __down+0x18/0x24 kernel/locking/semaphore.c:254 down+0x94/0xe8 kernel/locking/semaphore.c:63 console_lock+0x17c/0x204 kernel/printk/printk.c:2665 do_con_write+0x130/0x3d28 drivers/tty/vt/vt.c:3056 con_write+0x34/0x58 drivers/tty/vt/vt.c:3434 gsmld_output drivers/tty/n_gsm.c:3461 [inline] gsm_send_packet+0x5d8/0x7b0 drivers/tty/n_gsm.c:964 gsm_data_kick drivers/tty/n_gsm.c:1026 [inline] gsmld_write_task+0x130/0x89c drivers/tty/n_gsm.c:3496 process_one_work+0x7b8/0x15d4 kernel/workqueue.c:3267 process_scheduled_works kernel/workqueue.c:3348 [inline] worker_thread+0x938/0xef4 kernel/workqueue.c:3429 kthread+0x288/0x310 kernel/kthread.c:388 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860