BUG: sleeping function called from invalid context at drivers/tty/vt/vt.c:2245 in_atomic(): 1, irqs_disabled(): 1, pid: 9764, name: syz-executor.2 3 locks held by syz-executor.2/9764: #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284 #1: (&(&gsm->control_lock)->rlock){....}, at: [] gsm_control_send+0xf6/0x480 drivers/tty/n_gsm.c:1434 #2: (&(&gsm->tx_lock)->rlock){....}, at: [] gsm_data_queue drivers/tty/n_gsm.c:845 [inline] #2: (&(&gsm->tx_lock)->rlock){....}, at: [] gsm_control_transmit+0x1f1/0x2d0 drivers/tty/n_gsm.c:1375 irq event stamp: 42 hardirqs last enabled at (41): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (41): [] _raw_spin_unlock_irqrestore+0x79/0xe0 kernel/locking/spinlock.c:192 hardirqs last disabled at (42): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (42): [] _raw_spin_lock_irqsave+0x66/0xc0 kernel/locking/spinlock.c:160 softirqs last enabled at (0): [] copy_process.part.0+0x12d0/0x71c0 kernel/fork.c:1734 softirqs last disabled at (0): [< (null)>] (null) Preemption disabled at: [< (null)>] (null) CPU: 0 PID: 9764 Comm: syz-executor.2 Not tainted 4.14.305-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 ___might_sleep.cold+0x235/0x250 kernel/sched/core.c:6040 do_con_write+0xd0/0x19b0 drivers/tty/vt/vt.c:2245 con_write+0x21/0xa0 drivers/tty/vt/vt.c:2822 gsmld_output+0xc3/0x190 drivers/tty/n_gsm.c:2312 gsm_data_kick+0x266/0x9b0 drivers/tty/n_gsm.c:761 gsm_data_queue drivers/tty/n_gsm.c:846 [inline] gsm_control_transmit+0x1ff/0x2d0 drivers/tty/n_gsm.c:1375 gsm_control_send+0x38a/0x480 drivers/tty/n_gsm.c:1451 gsm_disconnect drivers/tty/n_gsm.c:2110 [inline] gsmld_config.constprop.0+0x568/0xf90 drivers/tty/n_gsm.c:2636 gsmld_ioctl+0x375/0x410 drivers/tty/n_gsm.c:2700 tty_ioctl+0x5af/0x1430 drivers/tty/tty_io.c:2670 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7f03850e30f9 RSP: 002b:00007f0383634168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f0385203050 RCX: 00007f03850e30f9 RDX: 0000000020000040 RSI: 00000000404c4701 RDI: 0000000000000003 RBP: 00007f038513eae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc98c4359f R14: 00007f0383634300 R15: 0000000000022000 ======================================================== WARNING: possible irq lock inversion dependency detected 4.14.305-syzkaller #0 Tainted: G W -------------------------------------------------------- systemd-udevd/4629 just changed the state of lock: (&(&gsm->control_lock)->rlock){..-.}, at: [] gsm_control_retransmit+0x25/0x2c0 drivers/tty/n_gsm.c:1394 but this lock took another, SOFTIRQ-unsafe lock in the past: (console_lock){+.+.} and interrupts could create inverse lock ordering between them. other info that might help us debug this: Chain exists of: &(&gsm->control_lock)->rlock --> &(&gsm->tx_lock)->rlock --> console_lock Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(console_lock); local_irq_disable(); lock(&(&gsm->control_lock)->rlock); lock(&(&gsm->tx_lock)->rlock); lock(&(&gsm->control_lock)->rlock); *** DEADLOCK *** 3 locks held by systemd-udevd/4629: #0: (&type->i_mutex_dir_key#4){++++}, at: [] inode_lock_shared include/linux/fs.h:729 [inline] #0: (&type->i_mutex_dir_key#4){++++}, at: [] lookup_slow+0x129/0x400 fs/namei.c:1674 #1: (&(&dentry->d_lockref.lock)->rlock){+.+.}, at: [] spin_lock include/linux/spinlock.h:317 [inline] #1: (&(&dentry->d_lockref.lock)->rlock){+.+.}, at: [] d_lookup_done include/linux/dcache.h:371 [inline] #1: (&(&dentry->d_lockref.lock)->rlock){+.+.}, at: [] lookup_slow+0x34e/0x400 fs/namei.c:1697 #2: (((&gsm->t2_timer))){+.-.}, at: [] lockdep_copy_map include/linux/lockdep.h:174 [inline] #2: (((&gsm->t2_timer))){+.-.}, at: [] call_timer_fn+0xb8/0x650 kernel/time/timer.c:1270 the shortest dependencies between 2nd lock and 1st lock: -> (console_lock){+.+.} ops: 4150 { HARDIRQ-ON-W at: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 console_lock+0x42/0x70 kernel/printk/printk.c:2228 con_init+0x12/0x5d6 drivers/tty/vt/vt.c:3022 console_init+0x46/0x53 kernel/printk/printk.c:2809 start_kernel+0x521/0x763 init/main.c:638 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:240 SOFTIRQ-ON-W at: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 console_lock+0x42/0x70 kernel/printk/printk.c:2228 con_init+0x12/0x5d6 drivers/tty/vt/vt.c:3022 console_init+0x46/0x53 kernel/printk/printk.c:2809 start_kernel+0x521/0x763 init/main.c:638 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:240 INITIAL USE at: } ... key at: [] console_lock_dep_map+0x0/0x40 ... acquired at: console_lock+0x42/0x70 kernel/printk/printk.c:2228 do_con_write+0xd5/0x19b0 drivers/tty/vt/vt.c:2247 con_write+0x21/0xa0 drivers/tty/vt/vt.c:2822 gsmld_output+0xc3/0x190 drivers/tty/n_gsm.c:2312 gsm_data_kick+0x266/0x9b0 drivers/tty/n_gsm.c:761 gsm_data_queue drivers/tty/n_gsm.c:846 [inline] gsm_control_transmit+0x1ff/0x2d0 drivers/tty/n_gsm.c:1375 gsm_control_send+0x38a/0x480 drivers/tty/n_gsm.c:1451 gsm_disconnect drivers/tty/n_gsm.c:2110 [inline] gsmld_config.constprop.0+0x568/0xf90 drivers/tty/n_gsm.c:2636 gsmld_ioctl+0x375/0x410 drivers/tty/n_gsm.c:2700 tty_ioctl+0x5af/0x1430 drivers/tty/tty_io.c:2670 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 -> (&(&gsm->tx_lock)->rlock){....} ops: 1 { INITIAL USE at: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x8c/0xc0 kernel/locking/spinlock.c:160 gsm_data_queue drivers/tty/n_gsm.c:845 [inline] gsm_control_transmit+0x1f1/0x2d0 drivers/tty/n_gsm.c:1375 gsm_control_send+0x38a/0x480 drivers/tty/n_gsm.c:1451 gsm_disconnect drivers/tty/n_gsm.c:2110 [inline] gsmld_config.constprop.0+0x568/0xf90 drivers/tty/n_gsm.c:2636 gsmld_ioctl+0x375/0x410 drivers/tty/n_gsm.c:2700 tty_ioctl+0x5af/0x1430 drivers/tty/tty_io.c:2670 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 } ... key at: [] __key.4+0x0/0x40 ... acquired at: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x8c/0xc0 kernel/locking/spinlock.c:160 gsm_data_queue drivers/tty/n_gsm.c:845 [inline] gsm_control_transmit+0x1f1/0x2d0 drivers/tty/n_gsm.c:1375 gsm_control_send+0x38a/0x480 drivers/tty/n_gsm.c:1451 gsm_disconnect drivers/tty/n_gsm.c:2110 [inline] gsmld_config.constprop.0+0x568/0xf90 drivers/tty/n_gsm.c:2636 gsmld_ioctl+0x375/0x410 drivers/tty/n_gsm.c:2700 tty_ioctl+0x5af/0x1430 drivers/tty/tty_io.c:2670 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 -> (&(&gsm->control_lock)->rlock){..-.} ops: 2 { IN-SOFTIRQ-W at: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x8c/0xc0 kernel/locking/spinlock.c:160 gsm_control_retransmit+0x25/0x2c0 drivers/tty/n_gsm.c:1394 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1280 expire_timers+0x232/0x4d0 kernel/time/timer.c:1319 __run_timers kernel/time/timer.c:1637 [inline] run_timer_softirq+0x1d5/0x5a0 kernel/time/timer.c:1650 __do_softirq+0x24d/0x9ff kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x193/0x240 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:638 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1106 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:796 arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] lock_acquire+0x1ec/0x3f0 kernel/locking/lockdep.c:4001 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:152 spin_lock include/linux/spinlock.h:317 [inline] d_lookup_done include/linux/dcache.h:371 [inline] lookup_slow+0x34e/0x400 fs/namei.c:1697 walk_component+0x6a1/0xbc0 fs/namei.c:1825 lookup_last fs/namei.c:2293 [inline] path_lookupat+0x1bb/0x780 fs/namei.c:2343 filename_lookup+0x18a/0x510 fs/namei.c:2377 user_path_at include/linux/namei.h:57 [inline] SYSC_faccessat fs/open.c:403 [inline] SyS_faccessat+0x21b/0x680 fs/open.c:353 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 INITIAL USE at: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x8c/0xc0 kernel/locking/spinlock.c:160 gsm_control_send+0xf6/0x480 drivers/tty/n_gsm.c:1434 gsm_disconnect drivers/tty/n_gsm.c:2110 [inline] gsmld_config.constprop.0+0x568/0xf90 drivers/tty/n_gsm.c:2636 gsmld_ioctl+0x375/0x410 drivers/tty/n_gsm.c:2700 tty_ioctl+0x5af/0x1430 drivers/tty/tty_io.c:2670 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 } ... key at: [] __key.5+0x0/0x40 ... acquired at: mark_lock_irq kernel/locking/lockdep.c:2804 [inline] mark_lock+0x3c7/0x1050 kernel/locking/lockdep.c:3194 mark_irqflags kernel/locking/lockdep.c:3072 [inline] __lock_acquire+0xc81/0x3f20 kernel/locking/lockdep.c:3448 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x8c/0xc0 kernel/locking/spinlock.c:160 gsm_control_retransmit+0x25/0x2c0 drivers/tty/n_gsm.c:1394 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1280 expire_timers+0x232/0x4d0 kernel/time/timer.c:1319 __run_timers kernel/time/timer.c:1637 [inline] run_timer_softirq+0x1d5/0x5a0 kernel/time/timer.c:1650 __do_softirq+0x24d/0x9ff kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x193/0x240 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:638 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1106 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:796 arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] lock_acquire+0x1ec/0x3f0 kernel/locking/lockdep.c:4001 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:152 spin_lock include/linux/spinlock.h:317 [inline] d_lookup_done include/linux/dcache.h:371 [inline] lookup_slow+0x34e/0x400 fs/namei.c:1697 walk_component+0x6a1/0xbc0 fs/namei.c:1825 lookup_last fs/namei.c:2293 [inline] path_lookupat+0x1bb/0x780 fs/namei.c:2343 filename_lookup+0x18a/0x510 fs/namei.c:2377 user_path_at include/linux/namei.h:57 [inline] SYSC_faccessat fs/open.c:403 [inline] SyS_faccessat+0x21b/0x680 fs/open.c:353 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 stack backtrace: CPU: 0 PID: 4629 Comm: systemd-udevd Tainted: G W 4.14.305-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 print_irq_inversion_bug.cold+0x313/0x346 kernel/locking/lockdep.c:2670 check_usage_forwards+0x18f/0x2d0 kernel/locking/lockdep.c:2695 mark_lock_irq kernel/locking/lockdep.c:2804 [inline] mark_lock+0x3c7/0x1050 kernel/locking/lockdep.c:3194 mark_irqflags kernel/locking/lockdep.c:3072 [inline] __lock_acquire+0xc81/0x3f20 kernel/locking/lockdep.c:3448 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x8c/0xc0 kernel/locking/spinlock.c:160 gsm_control_retransmit+0x25/0x2c0 drivers/tty/n_gsm.c:1394 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1280 expire_timers+0x232/0x4d0 kernel/time/timer.c:1319 __run_timers kernel/time/timer.c:1637 [inline] run_timer_softirq+0x1d5/0x5a0 kernel/time/timer.c:1650 __do_softirq+0x24d/0x9ff kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x193/0x240 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:638 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1106 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:796 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] RIP: 0010:lock_acquire+0x1ec/0x3f0 kernel/locking/lockdep.c:4001 RSP: 0018:ffff88809b29f980 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 RAX: 1ffffffff11e13d9 RBX: ffff88809b290280 RCX: 0000000000002886 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000286 RBP: ffff88808dcc8358 R08: ffffffff8b9b9fb0 R09: 0000000000040065 R10: ffff88809b290b30 R11: ffff88809b290280 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:152 spin_lock include/linux/spinlock.h:317 [inline] d_lookup_done include/linux/dcache.h:371 [inline] lookup_slow+0x34e/0x400 fs/namei.c:1697 walk_component+0x6a1/0xbc0 fs/namei.c:1825 lookup_last fs/namei.c:2293 [inline] path_lookupat+0x1bb/0x780 fs/namei.c:2343 filename_lookup+0x18a/0x510 fs/namei.c:2377 user_path_at include/linux/namei.h:57 [inline] SYSC_faccessat fs/open.c:403 [inline] SyS_faccessat+0x21b/0x680 fs/open.c:353 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7fc5868429c7 RSP: 002b:00007ffd2923a538 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 000055bf60de35e0 RCX: 00007fc5868429c7 RDX: 00746e657665752f RSI: 0000000000000000 RDI: 00007ffd2923a540 RBP: 00007ffd2923a5b0 R08: 000000000000c440 R09: 0000000000001010 R10: 00007fc586b00b58 R11: 0000000000000246 R12: 000055bf5f848856 R13: 000055bf60dd8550 R14: 00007ffd2923a540 R15: 000055bf60dccee0 EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue BUG: sleeping function called from invalid context at drivers/tty/vt/vt.c:2245 in_atomic(): 1, irqs_disabled(): 1, pid: 9999, name: syz-executor.2 INFO: lockdep is turned off. irq event stamp: 0 hardirqs last enabled at (0): [< (null)>] (null) hardirqs last disabled at (0): [] copy_process.part.0+0x1229/0x71c0 kernel/fork.c:1731 softirqs last enabled at (0): [] copy_process.part.0+0x12d0/0x71c0 kernel/fork.c:1734 softirqs last disabled at (0): [< (null)>] (null) Preemption disabled at: [< (null)>] (null) CPU: 1 PID: 9999 Comm: syz-executor.2 Tainted: G W 4.14.305-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 ___might_sleep.cold+0x235/0x250 kernel/sched/core.c:6040 do_con_write+0xd0/0x19b0 drivers/tty/vt/vt.c:2245 con_write+0x21/0xa0 drivers/tty/vt/vt.c:2822 gsmld_output+0xc3/0x190 drivers/tty/n_gsm.c:2312 gsm_data_kick+0x266/0x9b0 drivers/tty/n_gsm.c:761 gsm_data_queue drivers/tty/n_gsm.c:846 [inline] gsm_control_transmit+0x1ff/0x2d0 drivers/tty/n_gsm.c:1375 gsm_control_send+0x38a/0x480 drivers/tty/n_gsm.c:1451 gsm_disconnect drivers/tty/n_gsm.c:2110 [inline] gsmld_config.constprop.0+0x568/0xf90 drivers/tty/n_gsm.c:2636 gsmld_ioctl+0x375/0x410 drivers/tty/n_gsm.c:2700 tty_ioctl+0x5af/0x1430 drivers/tty/tty_io.c:2670 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7f03850e30f9 RSP: 002b:00007f0383634168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f0385203050 RCX: 00007f03850e30f9 RDX: 0000000020000040 RSI: 00000000404c4701 RDI: 0000000000000003 RBP: 00007f038513eae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc98c4359f R14: 00007f0383634300 R15: 0000000000022000 L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details. BUG: sleeping function called from invalid context at drivers/tty/vt/vt.c:2245 in_atomic(): 1, irqs_disabled(): 1, pid: 10187, name: syz-executor.2 INFO: lockdep is turned off. irq event stamp: 0 hardirqs last enabled at (0): [< (null)>] (null) hardirqs last disabled at (0): [] copy_process.part.0+0x1229/0x71c0 kernel/fork.c:1731 softirqs last enabled at (0): [] copy_process.part.0+0x12d0/0x71c0 kernel/fork.c:1734 softirqs last disabled at (0): [< (null)>] (null) Preemption disabled at: [< (null)>] (null) CPU: 0 PID: 10187 Comm: syz-executor.2 Tainted: G W 4.14.305-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 ___might_sleep.cold+0x235/0x250 kernel/sched/core.c:6040 do_con_write+0xd0/0x19b0 drivers/tty/vt/vt.c:2245 con_write+0x21/0xa0 drivers/tty/vt/vt.c:2822 gsmld_output+0xc3/0x190 drivers/tty/n_gsm.c:2312 gsm_data_kick+0x266/0x9b0 drivers/tty/n_gsm.c:761 gsm_data_queue drivers/tty/n_gsm.c:846 [inline] gsm_control_transmit+0x1ff/0x2d0 drivers/tty/n_gsm.c:1375 gsm_control_send+0x38a/0x480 drivers/tty/n_gsm.c:1451 gsm_disconnect drivers/tty/n_gsm.c:2110 [inline] gsmld_config.constprop.0+0x568/0xf90 drivers/tty/n_gsm.c:2636 gsmld_ioctl+0x375/0x410 drivers/tty/n_gsm.c:2700 tty_ioctl+0x5af/0x1430 drivers/tty/tty_io.c:2670 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7f03850e30f9 RSP: 002b:00007f0383634168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f0385203050 RCX: 00007f03850e30f9 RDX: 0000000020000040 RSI: 00000000404c4701 RDI: 0000000000000003 RBP: 00007f038513eae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc98c4359f R14: 00007f0383634300 R15: 0000000000022000 BUG: sleeping function called from invalid context at drivers/tty/vt/vt.c:2245 in_atomic(): 1, irqs_disabled(): 1, pid: 10424, name: syz-executor.2 INFO: lockdep is turned off. irq event stamp: 0 hardirqs last enabled at (0): [< (null)>] (null) hardirqs last disabled at (0): [] copy_process.part.0+0x1229/0x71c0 kernel/fork.c:1731 softirqs last enabled at (0): [] copy_process.part.0+0x12d0/0x71c0 kernel/fork.c:1734 softirqs last disabled at (0): [< (null)>] (null) Preemption disabled at: [< (null)>] (null) CPU: 0 PID: 10424 Comm: syz-executor.2 Tainted: G W 4.14.305-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 ___might_sleep.cold+0x235/0x250 kernel/sched/core.c:6040 do_con_write+0xd0/0x19b0 drivers/tty/vt/vt.c:2245 con_write+0x21/0xa0 drivers/tty/vt/vt.c:2822 gsmld_output+0xc3/0x190 drivers/tty/n_gsm.c:2312 gsm_data_kick+0x266/0x9b0 drivers/tty/n_gsm.c:761 gsm_data_queue drivers/tty/n_gsm.c:846 [inline] gsm_control_transmit+0x1ff/0x2d0 drivers/tty/n_gsm.c:1375 gsm_control_send+0x38a/0x480 drivers/tty/n_gsm.c:1451 gsm_disconnect drivers/tty/n_gsm.c:2110 [inline] gsmld_config.constprop.0+0x568/0xf90 drivers/tty/n_gsm.c:2636 gsmld_ioctl+0x375/0x410 drivers/tty/n_gsm.c:2700 tty_ioctl+0x5af/0x1430 drivers/tty/tty_io.c:2670 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7f03850e30f9 RSP: 002b:00007f0383634168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f0385203050 RCX: 00007f03850e30f9 RDX: 0000000020000040 RSI: 00000000404c4701 RDI: 0000000000000003 RBP: 00007f038513eae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc98c4359f R14: 00007f0383634300 R15: 0000000000022000 unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 ntfs: (device loop5): parse_options(): Unrecognized mount option ÿÿÿ0177777777777777777777718446744073709551615ÿÿÿÿÿÿÿÿ. ntfs: (device loop5): parse_options(): Unrecognized mount option ÿÿÿ0177777777777777777777718446744073709551615ÿÿÿÿÿÿÿÿ. pit: kvm: requested 838 ns i8254 timer period limited to 500000 ns pit: kvm: requested 1676 ns i8254 timer period limited to 500000 ns pit: kvm: requested 3352 ns i8254 timer period limited to 500000 ns pit: kvm: requested 3352 ns i8254 timer period limited to 500000 ns pit: kvm: requested 3352 ns i8254 timer period limited to 500000 ns ntfs: (device loop2): parse_options(): Unrecognized mount option ÿÿÿ0177777777777777777777718446744073709551615ÿÿÿÿÿÿÿÿ. pit: kvm: requested 3352 ns i8254 timer period limited to 500000 ns pit: kvm: requested 3352 ns i8254 timer period limited to 500000 ns pit: kvm: requested 3352 ns i8254 timer period limited to 500000 ns pit: kvm: requested 3352 ns i8254 timer period limited to 500000 ns ntfs: (device loop4): parse_options(): Unrecognized mount option ÿÿÿ0177777777777777777777718446744073709551615ÿÿÿÿÿÿÿÿ. pit: kvm: requested 3352 ns i8254 timer period limited to 500000 ns ntfs: (device loop5): parse_options(): Unrecognized mount option ÿÿÿ0177777777777777777777718446744073709551615ÿÿÿÿÿÿÿÿ. ntfs: (device loop2): parse_options(): Unrecognized mount option ÿÿÿ0177777777777777777777718446744073709551615ÿÿÿÿÿÿÿÿ. ntfs: (device loop4): parse_options(): Unrecognized mount option ÿÿÿ0177777777777777777777718446744073709551615ÿÿÿÿÿÿÿÿ. ntfs: (device loop5): parse_options(): Unrecognized mount option ÿÿÿ0177777777777777777777718446744073709551615ÿÿÿÿÿÿÿÿ. NILFS (loop0): invalid segment: Checksum error in segment payload ntfs: (device loop2): parse_options(): Unrecognized mount option ÿÿÿ0177777777777777777777718446744073709551615ÿÿÿÿÿÿÿÿ. NILFS (loop0): trying rollback from an earlier position NILFS (loop0): recovery complete NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds ntfs: (device loop4): parse_options(): Unrecognized mount option ÿÿÿ0177777777777777777777718446744073709551615ÿÿÿÿÿÿÿÿ.