BUG: sleeping function called from invalid context at kernel/printk/printk.c:2634 in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 5174, name: syz-executor336 preempt_count: 1, expected: 0 RCU nest depth: 0, expected: 0 3 locks held by syz-executor336/5174: #0: ffff8880202d70a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffff8880202d7130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: tty_write_lock drivers/tty/tty_io.c:954 [inline] #1: ffff8880202d7130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: iterate_tty_write drivers/tty/tty_io.c:973 [inline] #1: ffff8880202d7130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: file_tty_write.constprop.0+0x293/0x9b0 drivers/tty/tty_io.c:1092 #2: ffff8880186f83e0 (&gsm->tx_lock){....}-{2:2}, at: gsmld_write+0x62/0x150 drivers/tty/n_gsm.c:3721 irq event stamp: 538 hardirqs last enabled at (537): [] irqentry_exit+0x3b/0x80 kernel/entry/common.c:435 hardirqs last disabled at (538): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (538): [] _raw_spin_lock_irqsave+0x4e/0x50 kernel/locking/spinlock.c:162 softirqs last enabled at (0): [] copy_process+0x2198/0x73f0 kernel/fork.c:2448 softirqs last disabled at (0): [<0000000000000000>] 0x0 Preemption disabled at: [<0000000000000000>] 0x0 CPU: 2 PID: 5174 Comm: syz-executor336 Not tainted 6.7.0-rc8-syzkaller-00024-gac865f00af29 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 __might_resched+0x3c3/0x5e0 kernel/sched/core.c:10151 console_lock+0x34/0x150 kernel/printk/printk.c:2634 do_con_write+0x145/0x7f40 drivers/tty/vt/vt.c:2862 con_write+0x23/0xb0 drivers/tty/vt/vt.c:3251 gsmld_write+0xd0/0x150 drivers/tty/n_gsm.c:3724 iterate_tty_write drivers/tty/tty_io.c:1021 [inline] file_tty_write.constprop.0+0x519/0x9b0 drivers/tty/tty_io.c:1092 call_write_iter include/linux/fs.h:2020 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x64f/0xdf0 fs/read_write.c:584 ksys_write+0x12f/0x250 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f0bd46bbda9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe77174b08 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f0bd46bbda9 RDX: 0000000000000040 RSI: 0000000020000140 RDI: 0000000000000003 RBP: 00000000000f4240 R08: 00007ffe77174817 R09: 00000000000000a0 R10: 000000000000000d R11: 0000000000000246 R12: 000000000000a5ca R13: 00007ffe77174b1c R14: 00007ffe77174b30 R15: 00007ffe77174b20