BUG: sleeping function called from invalid context at kernel/printk/printk.c:2659
in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 10, name: kworker/0:1
preempt_count: 1, expected: 0
RCU nest depth: 0, expected: 0
5 locks held by kworker/0:1/10:
 #0: ffff888015488948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x12bf/0x1b60 kernel/workqueue.c:3206
 #1: ffffc900000d7d80 ((work_completion)(&m->wq)){+.+.}-{0:0}, at: process_one_work+0x957/0x1b60 kernel/workqueue.c:3207
 #2: ffff8880405bf0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
 #3: ffff8880405bf130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: tty_write_lock drivers/tty/tty_io.c:954 [inline]
 #3: ffff8880405bf130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: iterate_tty_write drivers/tty/tty_io.c:973 [inline]
 #3: ffff8880405bf130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: file_tty_write.constprop.0+0x293/0x9b0 drivers/tty/tty_io.c:1096
 #4: ffff88801f9823e0 (&gsm->tx_lock){....}-{2:2}, at: gsmld_write+0x62/0x150 drivers/tty/n_gsm.c:3721
irq event stamp: 22410
hardirqs last  enabled at (22409): [<ffffffff8aea0cd2>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last  enabled at (22409): [<ffffffff8aea0cd2>] _raw_spin_unlock_irqrestore+0x52/0x80 kernel/locking/spinlock.c:194
hardirqs last disabled at (22410): [<ffffffff8aea09e2>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline]
hardirqs last disabled at (22410): [<ffffffff8aea09e2>] _raw_spin_lock_irqsave+0x52/0x60 kernel/locking/spinlock.c:162
softirqs last  enabled at (22406): [<ffffffff8151e39e>] softirq_handle_end kernel/softirq.c:400 [inline]
softirqs last  enabled at (22406): [<ffffffff8151e39e>] handle_softirqs+0x5be/0x8f0 kernel/softirq.c:582
softirqs last disabled at (22391): [<ffffffff8151f16b>] __do_softirq kernel/softirq.c:588 [inline]
softirqs last disabled at (22391): [<ffffffff8151f16b>] invoke_softirq kernel/softirq.c:428 [inline]
softirqs last disabled at (22391): [<ffffffff8151f16b>] __irq_exit_rcu kernel/softirq.c:637 [inline]
softirqs last disabled at (22391): [<ffffffff8151f16b>] irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 0 PID: 10 Comm: kworker/0:1 Not tainted 6.9.0-syzkaller-08654-g0cc6f45cecb4 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: events p9_write_work
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
 __might_resched+0x3c0/0x5e0 kernel/sched/core.c:10196
 console_lock+0x1b/0xa0 kernel/printk/printk.c:2659
 do_con_write+0x154/0x7bb0 drivers/tty/vt/vt.c:3056
 con_write+0x23/0xb0 drivers/tty/vt/vt.c:3434
 gsmld_write+0xd2/0x150 drivers/tty/n_gsm.c:3724
 iterate_tty_write drivers/tty/tty_io.c:1021 [inline]
 file_tty_write.constprop.0+0x518/0x9b0 drivers/tty/tty_io.c:1096
 __kernel_write_iter+0x310/0xa50 fs/read_write.c:523
 __kernel_write fs/read_write.c:543 [inline]
 kernel_write fs/read_write.c:564 [inline]
 kernel_write+0x1fc/0x6c0 fs/read_write.c:554
 p9_fd_write net/9p/trans_fd.c:432 [inline]
 p9_write_work+0x244/0xbf0 net/9p/trans_fd.c:483
 process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231
 process_scheduled_works kernel/workqueue.c:3312 [inline]
 worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
bridge0: port 1(bridge_slave_0) entered blocking state
bridge0: port 1(bridge_slave_0) entered forwarding state
bridge0: port 2(bridge_slave_1) entered blocking state
bridge0: port 2(bridge_slave_1) entered forwarding state