BUG: sleeping function called from invalid context at kernel/printk/printk.c:2545 in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 3719, name: syz-executor.2 3 locks held by syz-executor.2/3719: #0: ffff888088686098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252 #1: ffff888088686130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: tty_write_lock drivers/tty/tty_io.c:961 [inline] #1: ffff888088686130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: do_tty_write drivers/tty/tty_io.c:984 [inline] #1: ffff888088686130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: file_tty_write+0x24f/0x920 drivers/tty/tty_io.c:1110 #2: ffff888088687398 (&gsm->tx_lock){....}-{2:2}, at: gsmld_write+0x5b/0x120 drivers/tty/n_gsm.c:2927 irq event stamp: 142 hardirqs last enabled at (141): [] syscall_enter_from_user_mode+0x2e/0x230 kernel/entry/common.c:107 hardirqs last disabled at (142): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (142): [] _raw_spin_lock_irqsave+0xac/0x120 kernel/locking/spinlock.c:162 softirqs last enabled at (0): [] copy_process+0x13b9/0x3ef0 kernel/fork.c:2143 softirqs last disabled at (0): [<0000000000000000>] 0x0 Preemption disabled at: [<0000000000000000>] 0x0 CPU: 0 PID: 3719 Comm: syz-executor.2 Not tainted 5.15.127-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 ___might_sleep+0x547/0x6a0 kernel/sched/core.c:9625 console_lock+0x18/0x70 kernel/printk/printk.c:2545 do_con_write+0x110/0x7270 drivers/tty/vt/vt.c:2908 con_write+0x20/0x40 drivers/tty/vt/vt.c:3295 gsmld_write+0xf9/0x120 drivers/tty/n_gsm.c:2930 do_tty_write drivers/tty/tty_io.c:1038 [inline] file_tty_write+0x561/0x920 drivers/tty/tty_io.c:1110 call_write_iter include/linux/fs.h:2103 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0xacf/0xe50 fs/read_write.c:594 ksys_write+0x1a2/0x2c0 fs/read_write.c:647 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fa444f6fae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa4434d00c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fa44508f050 RCX: 00007fa444f6fae9 RDX: 00000000000000e9 RSI: 0000000020000380 RDI: 0000000000000005 RBP: 00007fa444fbb47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007fa44508f050 R15: 00007ffc410e9f98 BUG: scheduling while atomic: syz-executor.2/3719/0x00000002 3 locks held by syz-executor.2/3719: #0: ffff888088686098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252 #1: ffff888088686130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: tty_write_lock drivers/tty/tty_io.c:961 [inline] #1: ffff888088686130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: do_tty_write drivers/tty/tty_io.c:984 [inline] #1: ffff888088686130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: file_tty_write+0x24f/0x920 drivers/tty/tty_io.c:1110 #2: ffff888088687398 (&gsm->tx_lock){+.+.}-{2:2}, at: gsmld_write+0x5b/0x120 drivers/tty/n_gsm.c:2927 Modules linked in: Preemption disabled at: [<0000000000000000>] 0x0