syzbot

BUG: sleeping function called from invalid context at kernel/printk/printk.c:2555
in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 3809, name: syz-executor.4
3 locks held by syz-executor.4/3809:
 #0: ffff88807f30c098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
 #1: ffff88807f30c130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: tty_write_lock drivers/tty/tty_io.c:961 [inline]
 #1: ffff88807f30c130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: do_tty_write drivers/tty/tty_io.c:984 [inline]
 #1: ffff88807f30c130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: file_tty_write+0x24f/0x920 drivers/tty/tty_io.c:1110
 #2: ffff88801fb43398 (&gsm->tx_lock){....}-{2:2}, at: gsmld_write+0x5b/0x120 drivers/tty/n_gsm.c:2929
irq event stamp: 50
hardirqs last  enabled at (49): [<ffffffff81c966d2>] ___slab_alloc+0xd12/0xe10 mm/slub.c:2963
hardirqs last disabled at (50): [<ffffffff8a2719dc>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline]
hardirqs last disabled at (50): [<ffffffff8a2719dc>] _raw_spin_lock_irqsave+0xac/0x120 kernel/locking/spinlock.c:162
softirqs last  enabled at (0): [<ffffffff814b4ee9>] copy_process+0x13b9/0x3ef0 kernel/fork.c:2151
softirqs last disabled at (0): [<0000000000000000>] 0x0
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 1 PID: 3809 Comm: syz-executor.4 Not tainted 5.15.156-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
 ___might_sleep+0x547/0x6a0 kernel/sched/core.c:9626
 console_lock+0x18/0x70 kernel/printk/printk.c:2555
 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:2932
 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:2172 [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+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fa400a32ea9
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:00007fa3fef840c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa400b61050 RCX: 00007fa400a32ea9
RDX: 0000000000000675 RSI: 0000000020000c00 RDI: 0000000000000005
RBP: 00007fa400a7f4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fa400b61050 R15: 00007ffc2ebec848
 </TASK>