RBP: 000000000072bea0 R08: 0000000020000480 R09: 0000000000000000 R10: 0000000020000300 R11: 0000000000000246 R12: 0000000000000014 R13: 0000000000000052 R14: 00000000006f5850 R15: 0000000000000003 kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 0 PID: 29170 Comm: blkid Not tainted 4.17.0-rc7+ #81 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__delayacct_blkio_end+0x4f/0xc0 kernel/delayacct.c:82 RSP: 0018:ffff8801dae06aa0 EFLAGS: 00010002 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffff8801b5c84638 RDX: 0000000000000007 RSI: ffffffff817a5061 RDI: 0000000000000038 RBP: ffff8801dae06ab8 R08: ffffed003b5c46d3 R09: 0000000000000001 R10: ffff8801dae06b48 R11: ffff8801dae23693 R12: ffff8801af288440 R13: ffff8801b5c84600 R14: ffff8801b5c8463c R15: 0000000000000002 FS: 0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd5644dd4a0 CR3: 00000001c9336000 CR4: 00000000001426f0 DR0: 000000000000b8c4 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: delayacct_blkio_end include/linux/delayacct.h:128 [inline] try_to_wake_up+0xaa5/0x1280 kernel/sched/core.c:2054 default_wake_function+0x30/0x50 kernel/sched/core.c:3756 autoremove_wake_function+0x7a/0x350 kernel/sched/wait.c:373 wake_bit_function+0xcb/0x160 kernel/sched/wait_bit.c:30 __wake_up_common+0x189/0x730 kernel/sched/wait.c:90 __wake_up_common_lock+0x1b4/0x300 kernel/sched/wait.c:119 __wake_up+0xe/0x10 kernel/sched/wait.c:143 __wake_up_bit+0x1a6/0x270 kernel/sched/wait_bit.c:125 wake_up_bit+0x3d/0x40 kernel/sched/wait_bit.c:148 journal_end_buffer_io_sync+0xa4/0xe0 fs/jbd2/commit.c:44 end_bio_bh_io_sync+0xf3/0x140 fs/buffer.c:2969 bio_endio+0x4b8/0x920 block/bio.c:1775 req_bio_endio block/blk-core.c:284 [inline] blk_update_request+0x3a3/0xcb0 block/blk-core.c:3100 scsi_end_request+0xd3/0x870 drivers/scsi/scsi_lib.c:672 scsi_io_completion+0xca9/0x1d10 drivers/scsi/scsi_lib.c:898 scsi_finish_command+0x542/0x8d0 drivers/scsi/scsi.c:248 scsi_softirq_done+0x3d9/0x4b0 drivers/scsi/scsi_lib.c:1683 __blk_mq_complete_request+0x4c8/0x9f0 block/blk-mq.c:567 blk_mq_complete_request+0x2a5/0x370 block/blk-mq.c:652 scsi_mq_done+0xe2/0x430 drivers/scsi/scsi_lib.c:1994 virtscsi_complete_cmd+0x573/0x740 drivers/scsi/virtio_scsi.c:207 virtscsi_vq_done+0xc3/0x170 drivers/scsi/virtio_scsi.c:223 virtscsi_req_done+0xa7/0xd0 drivers/scsi/virtio_scsi.c:238 vring_interrupt+0x128/0x170 drivers/virtio/virtio_ring.c:950 __handle_irq_event_percpu+0x1c0/0xad0 kernel/irq/handle.c:149 handle_irq_event_percpu+0x98/0x1c0 kernel/irq/handle.c:189 handle_irq_event+0xa7/0x135 kernel/irq/handle.c:206 handle_edge_irq+0x20f/0x870 kernel/irq/chip.c:791 generic_handle_irq_desc include/linux/irqdesc.h:159 [inline] handle_irq+0x18c/0x2e7 arch/x86/kernel/irq_64.c:77 do_IRQ+0x78/0x190 arch/x86/kernel/irq.c:245 common_interrupt+0xf/0xf arch/x86/entry/entry_64.S:642 RIP: 0010:__vma_adjust+0xae7/0x1840 mm/mmap.c:977 RSP: 0018:ffff8801b634fac8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffffda RAX: 0000000000000000 RBX: ffff8801d2f30880 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff81a952b0 RDI: ffffed0036c69f38 RBP: ffff8801b634fb98 R08: ffffffff81a4eed0 R09: ffff8801d1d14a50 R10: ffff8801af288ca0 R11: ffff8801af288440 R12: dffffc0000000000 R13: 00007fd5642bf000 R14: 00007fd5640bb000 R15: ffff8801b9270d68 vma_adjust include/linux/mm.h:2163 [inline] __split_vma+0x66d/0x7f0 mm/mmap.c:2654 split_vma+0xa3/0xe0 mm/mmap.c:2686 mprotect_fixup+0x4e8/0x700 mm/mprotect.c:362 do_mprotect_pkey+0x5c9/0xa50 mm/mprotect.c:506 __do_sys_mprotect mm/mprotect.c:531 [inline] __se_sys_mprotect mm/mprotect.c:528 [inline] __x64_sys_mprotect+0x78/0xb0 mm/mprotect.c:528 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fd5642d5447 RSP: 002b:00007ffd1df8d108 EFLAGS: 00000206 ORIG_RAX: 000000000000000a RAX: ffffffffffffffda RBX: 00007fd5644dd4c8 RCX: 00007fd5642d5447 RDX: 0000000000000000 RSI: 0000000000200000 RDI: 00007fd5640bb000 RBP: 00007ffd1df8d3d0 R08: 0000000000000003 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000206 R12: 00007ffd1df8d4b8 R13: 0000000000000002 R14: 0000000000000030 R15: 00007ffd1df8d150 Code: fa 48 c1 ea 03 80 3c 02 00 0f 85 80 00 00 00 48 8b 9b 30 12 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 38 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 04 3c 03 7e 51 44 8b 63 38 31 ff 41 83 e4 RIP: __delayacct_blkio_end+0x4f/0xc0 kernel/delayacct.c:82 RSP: ffff8801dae06aa0 ====================================================== WARNING: possible circular locking dependency detected 4.17.0-rc7+ #81 Not tainted ------------------------------------------------------ blkid/29170 is trying to acquire lock: 00000000be766bbd ((console_sem).lock){-.-.}, at: down_trylock+0x13/0x70 kernel/locking/semaphore.c:136 but task is already holding lock: 000000003ca4921b (&p->pi_lock){-.-.}, at: try_to_wake_up+0xca/0x1280 kernel/sched/core.c:1983 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&p->pi_lock){-.-.}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x96/0xc0 kernel/locking/spinlock.c:152 try_to_wake_up+0xca/0x1280 kernel/sched/core.c:1983 wake_up_process+0x10/0x20 kernel/sched/core.c:2146 __up.isra.1+0x1b8/0x290 kernel/locking/semaphore.c:262 up+0x12f/0x1b0 kernel/locking/semaphore.c:187 __up_console_sem+0xbe/0x1b0 kernel/printk/printk.c:242 console_unlock+0x7d6/0x1100 kernel/printk/printk.c:2417 do_con_write+0x12b2/0x2280 drivers/tty/vt/vt.c:2437 con_write+0x25/0xc0 drivers/tty/vt/vt.c:2786 process_output_block drivers/tty/n_tty.c:579 [inline] n_tty_write+0x6b9/0x1180 drivers/tty/n_tty.c:2308 do_tty_write drivers/tty/tty_io.c:958 [inline] tty_write+0x3f1/0x880 drivers/tty/tty_io.c:1042 __vfs_write+0x10b/0x960 fs/read_write.c:485 vfs_write+0x1f8/0x560 fs/read_write.c:549 ksys_write+0xf9/0x250 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 ((console_sem).lock){-.-.}: lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3920 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x96/0xc0 kernel/locking/spinlock.c:152 down_trylock+0x13/0x70 kernel/locking/semaphore.c:136 __down_trylock_console_sem+0xae/0x200 kernel/printk/printk.c:225 console_trylock+0x15/0xa0 kernel/printk/printk.c:2229 console_trylock_spinning kernel/printk/printk.c:1643 [inline] vprintk_emit+0x694/0xdd0 kernel/printk/printk.c:1906 vprintk_default+0x28/0x30 kernel/printk/printk.c:1947 vprintk_func+0x7a/0xe7 kernel/printk/printk_safe.c:379 printk+0x9e/0xba kernel/printk/printk.c:1980 kasan_die_handler.cold.22+0x11/0x30 arch/x86/mm/kasan_init_64.c:253 notifier_call_chain+0x178/0x380 kernel/notifier.c:93 __atomic_notifier_call_chain kernel/notifier.c:183 [inline] atomic_notifier_call_chain+0x98/0x190 kernel/notifier.c:193 notify_die+0x1a3/0x2b0 kernel/notifier.c:549 do_general_protection+0x248/0x2f0 arch/x86/kernel/traps.c:558 general_protection+0x1e/0x30 arch/x86/entry/entry_64.S:1159 __delayacct_blkio_end+0x4f/0xc0 kernel/delayacct.c:82 delayacct_blkio_end include/linux/delayacct.h:128 [inline] try_to_wake_up+0xaa5/0x1280 kernel/sched/core.c:2054 default_wake_function+0x30/0x50 kernel/sched/core.c:3756 autoremove_wake_function+0x7a/0x350 kernel/sched/wait.c:373 wake_bit_function+0xcb/0x160 kernel/sched/wait_bit.c:30 __wake_up_common+0x189/0x730 kernel/sched/wait.c:90 __wake_up_common_lock+0x1b4/0x300 kernel/sched/wait.c:119 __wake_up+0xe/0x10 kernel/sched/wait.c:143 __wake_up_bit+0x1a6/0x270 kernel/sched/wait_bit.c:125 wake_up_bit+0x3d/0x40 kernel/sched/wait_bit.c:148 journal_end_buffer_io_sync+0xa4/0xe0 fs/jbd2/commit.c:44 end_bio_bh_io_sync+0xf3/0x140 fs/buffer.c:2969 bio_endio+0x4b8/0x920 block/bio.c:1775 req_bio_endio block/blk-core.c:284 [inline] blk_update_request+0x3a3/0xcb0 block/blk-core.c:3100 scsi_end_request+0xd3/0x870 drivers/scsi/scsi_lib.c:672 scsi_io_completion+0xca9/0x1d10 drivers/scsi/scsi_lib.c:898 scsi_finish_command+0x542/0x8d0 drivers/scsi/scsi.c:248 scsi_softirq_done+0x3d9/0x4b0 drivers/scsi/scsi_lib.c:1683 __blk_mq_complete_request+0x4c8/0x9f0 block/blk-mq.c:567 blk_mq_complete_request+0x2a5/0x370 block/blk-mq.c:652 scsi_mq_done+0xe2/0x430 drivers/scsi/scsi_lib.c:1994 virtscsi_complete_cmd+0x573/0x740 drivers/scsi/virtio_scsi.c:207 virtscsi_vq_done+0xc3/0x170 drivers/scsi/virtio_scsi.c:223 virtscsi_req_done+0xa7/0xd0 drivers/scsi/virtio_scsi.c:238 vring_interrupt+0x128/0x170 drivers/virtio/virtio_ring.c:950 __handle_irq_event_percpu+0x1c0/0xad0 kernel/irq/handle.c:149 handle_irq_event_percpu+0x98/0x1c0 kernel/irq/handle.c:189 handle_irq_event+0xa7/0x135 kernel/irq/handle.c:206 handle_edge_irq+0x20f/0x870 kernel/irq/chip.c:791 generic_handle_irq_desc include/linux/irqdesc.h:159 [inline] handle_irq+0x18c/0x2e7 arch/x86/kernel/irq_64.c:77 do_IRQ+0x78/0x190 arch/x86/kernel/irq.c:245 ret_from_intr+0x0/0x1e __vma_adjust+0xae7/0x1840 mm/mmap.c:977 vma_adjust include/linux/mm.h:2163 [inline] __split_vma+0x66d/0x7f0 mm/mmap.c:2654 split_vma+0xa3/0xe0 mm/mmap.c:2686 mprotect_fixup+0x4e8/0x700 mm/mprotect.c:362 do_mprotect_pkey+0x5c9/0xa50 mm/mprotect.c:506 __do_sys_mprotect mm/mprotect.c:531 [inline] __se_sys_mprotect mm/mprotect.c:528 [inline] __x64_sys_mprotect+0x78/0xb0 mm/mprotect.c:528 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&p->pi_lock); lock((console_sem).lock); lock(&p->pi_lock); lock((console_sem).lock); *** DEADLOCK *** 7 locks held by blkid/29170: #0: 0000000031508b99 (&mm->mmap_sem){++++}, at: do_mprotect_pkey+0x1e9/0xa50 mm/mprotect.c:434 #1: 0000000014e969d0 (&mapping->i_mmap_rwsem){++++}, at: i_mmap_lock_write include/linux/fs.h:468 [inline] #1: 0000000014e969d0 (&mapping->i_mmap_rwsem){++++}, at: __vma_adjust+0x225/0x1840 mm/mmap.c:799 #2: 000000001a2e1d5c (&(&virtscsi_vq->vq_lock)->rlock){-.-.}, at: virtscsi_vq_done+0x9d/0x170 drivers/scsi/virtio_scsi.c:219 #3: 000000002d17cbe4 (rcu_read_lock){....}, at: hctx_lock+0x7a/0x1d0 block/blk-mq.c:586 #4: 00000000856658d3 (bit_wait_table + i){-.-.}, at: __wake_up_common_lock+0x190/0x300 kernel/sched/wait.c:118 #5: 000000003ca4921b (&p->pi_lock){-.-.}, at: try_to_wake_up+0xca/0x1280 kernel/sched/core.c:1983 #6: 000000002d17cbe4 (rcu_read_lock){....}, at: atomic_notifier_call_chain+0x0/0x190 include/linux/compiler.h:188 stack backtrace: CPU: 0 PID: 29170 Comm: blkid Not tainted 4.17.0-rc7+ #81 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1b9/0x294 lib/dump_stack.c:113 print_circular_bug.isra.36.cold.54+0x1bd/0x27d kernel/locking/lockdep.c:1223 check_prev_add kernel/locking/lockdep.c:1863 [inline] check_prevs_add kernel/locking/lockdep.c:1976 [inline] validate_chain kernel/locking/lockdep.c:2417 [inline] __lock_acquire+0x343e/0x5140 kernel/locking/lockdep.c:3431 lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3920 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x96/0xc0 kernel/locking/spinlock.c:152 down_trylock+0x13/0x70 kernel/locking/semaphore.c:136 __down_trylock_console_sem+0xae/0x200 kernel/printk/printk.c:225 console_trylock+0x15/0xa0 kernel/printk/printk.c:2229 console_trylock_spinning kernel/printk/printk.c:1643 [inline] vprintk_emit+0x694/0xdd0 kernel/printk/printk.c:1906 vprintk_default+0x28/0x30 kernel/printk/printk.c:1947 vprintk_func+0x7a/0xe7 kernel/printk/printk_safe.c:379 printk+0x9e/0xba kernel/printk/printk.c:1980 kasan_die_handler.cold.22+0x11/0x30 arch/x86/mm/kasan_init_64.c:253 notifier_call_chain+0x178/0x380 kernel/notifier.c:93 __atomic_notifier_call_chain kernel/notifier.c:183 [inline] atomic_notifier_call_chain+0x98/0x190 kernel/notifier.c:193 notify_die+0x1a3/0x2b0 kernel/notifier.c:549 do_general_protection+0x248/0x2f0 arch/x86/kernel/traps.c:558 general_protection+0x1e/0x30 arch/x86/entry/entry_64.S:1159 RIP: 0010:__delayacct_blkio_end+0x4f/0xc0 kernel/delayacct.c:82 RSP: 0018:ffff8801dae06aa0 EFLAGS: 00010002 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffff8801b5c84638 RDX: 0000000000000007 RSI: ffffffff817a5061 RDI: 0000000000000038 RBP: ffff8801dae06ab8 R08: ffffed003b5c46d3 R09: 0000000000000001 R10: ffff8801dae06b48 R11: ffff8801dae23693 R12: ffff8801af288440 R13: ffff8801b5c84600 R14: ffff8801b5c8463c R15: 0000000000000002 delayacct_blkio_end include/linux/delayacct.h:128 [inline] try_to_wake_up+0xaa5/0x1280 kernel/sched/core.c:2054 default_wake_function+0x30/0x50 kernel/sched/core.c:3756 autoremove_wake_function+0x7a/0x350 kernel/sched/wait.c:373 wake_bit_function+0xcb/0x160 kernel/sched/wait_bit.c:30 __wake_up_common+0x189/0x730 kernel/sched/wait.c:90 __wake_up_common_lock+0x1b4/0x300 kernel/sched/wait.c:119 __wake_up+0xe/0x10 kernel/sched/wait.c:143 __wake_up_bit+0x1a6/0x270 kernel/sched/wait_bit.c:125 wake_up_bit+0x3d/0x40 kernel/sched/wait_bit.c:148 journal_end_buffer_io_sync+0xa4/0xe0 fs/jbd2/commit.c:44 end_bio_bh_io_sync+0xf3/0x140 fs/buffer.c:2969 bio_endio+0x4b8/0x920 block/bio.c:1775 Lost 102 message(s)! ---[ end trace 78770f272ed76aca ]---