BUG: sleeping function called from invalid context at kernel/printk/printk.c:2555 in_atomic(): 1, irqs_disabled(): 128, non_block: 0, pid: 6392, name: syz.0.714 3 locks held by syz.0.714/6392: #0: ffff0000d6253098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340 #1: ffff0000d6253130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: tty_write_lock drivers/tty/tty_io.c:961 [inline] #1: ffff0000d6253130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: do_tty_write drivers/tty/tty_io.c:984 [inline] #1: ffff0000d6253130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: file_tty_write+0x1d4/0x758 drivers/tty/tty_io.c:1110 #2: ffff0000ca6b9398 (&gsm->tx_lock){....}-{2:2}, at: gsmld_write+0x60/0x164 drivers/tty/n_gsm.c:2983 irq event stamp: 342 hardirqs last enabled at (341): [] local_daif_restore arch/arm64/include/asm/daifflags.h:75 [inline] hardirqs last enabled at (341): [] el0_svc_common+0x9c/0x258 arch/arm64/kernel/syscall.c:107 hardirqs last disabled at (342): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (342): [] _raw_spin_lock_irqsave+0xfc/0x14c kernel/locking/spinlock.c:162 softirqs last enabled at (336): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:31 softirqs last disabled at (334): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:18 Preemption disabled at: [] gsmld_write+0x60/0x164 drivers/tty/n_gsm.c:2983 CPU: 1 PID: 6392 Comm: syz.0.714 Not tainted 5.15.162-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call trace: dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 dump_stack+0x1c/0x58 lib/dump_stack.c:113 ___might_sleep+0x380/0x4dc kernel/sched/core.c:9626 __might_sleep+0x98/0xf0 kernel/sched/core.c:9580 console_lock+0x30/0x16c kernel/printk/printk.c:2555 do_con_write+0x110/0x5934 drivers/tty/vt/vt.c:2908 con_write+0x34/0x58 drivers/tty/vt/vt.c:3295 gsmld_write+0x108/0x164 drivers/tty/n_gsm.c:2986 do_tty_write drivers/tty/tty_io.c:1038 [inline] file_tty_write+0x44c/0x758 drivers/tty/tty_io.c:1110 tty_write+0x48/0x58 drivers/tty/tty_io.c:1131 call_write_iter include/linux/fs.h:2172 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x87c/0xb3c fs/read_write.c:594 ksys_write+0x15c/0x26c fs/read_write.c:647 __do_sys_write fs/read_write.c:659 [inline] __se_sys_write fs/read_write.c:656 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:656 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 loop0: detected capacity change from 0 to 512 UDF-fs: warning (device loop0): udf_load_vrs: No VRS found UDF-fs: Scanning with blocksize 512 failed UDF-fs: warning (device loop0): udf_load_vrs: No VRS found UDF-fs: Scanning with blocksize 1024 failed UDF-fs: warning (device loop0): udf_load_vrs: No VRS found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device loop0): udf_read_tagged: read failed, block=256, location=256 UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000)