BUG: sleeping function called from invalid context at kernel/printk/printk.c:2659 in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 6813, name: syz-executor.3 preempt_count: 1, expected: 0 RCU nest depth: 0, expected: 0 3 locks held by syz-executor.3/6813: #0: ffff0000c71420a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff0000c7142130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: tty_write_lock drivers/tty/tty_io.c:954 [inline] #1: ffff0000c7142130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: iterate_tty_write drivers/tty/tty_io.c:973 [inline] #1: ffff0000c7142130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: file_tty_write+0x188/0x7a4 drivers/tty/tty_io.c:1096 #2: ffff0000f09343e0 (&gsm->tx_lock){....}-{2:2}, at: gsmld_write+0x60/0x154 drivers/tty/n_gsm.c:3721 irq event stamp: 4032 hardirqs last enabled at (4031): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (4031): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (4032): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (4032): [] _raw_spin_lock_irqsave+0x2c/0x7c kernel/locking/spinlock.c:162 softirqs last enabled at (4018): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (4016): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 Preemption disabled at: [] gsmld_write+0x60/0x154 drivers/tty/n_gsm.c:3721 CPU: 1 PID: 6813 Comm: syz-executor.3 Not tainted 6.9.0-rc7-syzkaller-gfda5695d692c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 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_write+0x104/0x154 drivers/tty/n_gsm.c:3724 iterate_tty_write drivers/tty/tty_io.c:1021 [inline] file_tty_write+0x410/0x7a4 drivers/tty/tty_io.c:1096 tty_write+0x48/0x58 drivers/tty/tty_io.c:1117 do_iter_readv_writev+0x438/0x658 vfs_writev+0x410/0xb58 fs/read_write.c:971 do_writev+0x178/0x304 fs/read_write.c:1018 __do_sys_writev fs/read_write.c:1091 [inline] __se_sys_writev fs/read_write.c:1088 [inline] __arm64_sys_writev+0x80/0x94 fs/read_write.c:1088 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598