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: 3951 Comm: kworker/u4:6 Not tainted 4.16.0+ #3 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:ffff8801db006aa0 EFLAGS: 00010002 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffff8801b1b804a0 RDX: 0000000000000007 RSI: ffffffff817804f1 RDI: 0000000000000038 RBP: ffff8801db006ab8 R08: ffffed003b6046c3 R09: 0000000000000001 R10: ffff8801db006b48 R11: ffff8801db023613 R12: ffff8801997422c0 R13: ffff8801b1b80440 R14: ffff8801b1b804a4 R15: 0000000000000002 FS: 0000000000000000(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8c0ffab330 CR3: 000000019f83b000 CR4: 00000000001406f0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: delayacct_blkio_end include/linux/delayacct.h:128 [inline] try_to_wake_up+0xa96/0x11a0 kernel/sched/core.c:2034 default_wake_function+0x30/0x50 kernel/sched/core.c:3743 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:2992 bio_endio+0x4b8/0x920 block/bio.c:1775 req_bio_endio block/blk-core.c:208 [inline] blk_update_request+0x3a3/0xcb0 block/blk-core.c:2990 scsi_end_request+0xd3/0x870 drivers/scsi/scsi_lib.c:660 scsi_io_completion+0xcb2/0x1a20 drivers/scsi/scsi_lib.c:868 scsi_finish_command+0x542/0x8d0 drivers/scsi/scsi.c:248 scsi_softirq_done+0x3d9/0x4b0 drivers/scsi/scsi_lib.c:1653 __blk_mq_complete_request+0x4c8/0x9f0 block/blk-mq.c:559 blk_mq_complete_request+0x2a5/0x370 block/blk-mq.c:644 scsi_mq_done+0xe2/0x430 drivers/scsi/scsi_lib.c:1964 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:951 __handle_irq_event_percpu+0x1c0/0xad0 kernel/irq/handle.c:147 handle_irq_event_percpu+0x98/0x1c0 kernel/irq/handle.c:187 handle_irq_event+0xa7/0x135 kernel/irq/handle.c:204 handle_edge_irq+0x20f/0x870 kernel/irq/chip.c:793 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:238 common_interrupt+0xf/0xf arch/x86/entry/entry_64.S:641 RIP: 0010:update_stack_state+0x3e8/0x670 arch/x86/kernel/unwind_frame.c:208 RSP: 0018:ffff88019a5cf330 EFLAGS: 00000282 ORIG_RAX: ffffffffffffffda RAX: 0000000000000001 RBX: ffff88019a5cfb10 RCX: 1ffff100334b9e00 RDX: dffffc0000000000 RSI: ffff88019a5cfb20 RDI: ffff88019a5cf5a8 RBP: ffff88019a5cf438 R08: ffff88019a5cf598 R09: ffff8801997422c0 R10: ffffed00334b9eb6 R11: ffff88019a5cf5b7 R12: ffffed00334b9e6e R13: ffff88019a5cf550 R14: ffff88019a5cf560 R15: ffff88019a5cf5a0 unwind_next_frame.part.7+0x1a9/0x9c0 arch/x86/kernel/unwind_frame.c:329 unwind_next_frame+0x3e/0x50 arch/x86/kernel/unwind_frame.c:287 __save_stack_trace+0x6e/0xd0 arch/x86/kernel/stacktrace.c:44 save_stack_trace+0x1a/0x20 arch/x86/kernel/stacktrace.c:60 save_stack+0x43/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:552 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:489 slab_post_alloc_hook mm/slab.h:443 [inline] slab_alloc mm/slab.c:3380 [inline] __do_kmalloc mm/slab.c:3704 [inline] __kmalloc+0x137/0x760 mm/slab.c:3715 kmalloc include/linux/slab.h:517 [inline] load_elf_binary+0x79f/0x55e0 fs/binfmt_elf.c:757 search_binary_handler+0x17d/0x570 fs/exec.c:1638 exec_binprm fs/exec.c:1680 [inline] do_execveat_common.isra.34+0x1574/0x23f0 fs/exec.c:1802 do_execve+0x31/0x40 fs/exec.c:1847 call_usermodehelper_exec_async+0x464/0x930 kernel/umh.c:100 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:411 Code: fa 48 c1 ea 03 80 3c 02 00 0f 85 80 00 00 00 48 8b 9b 70 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: ffff8801db006aa0 ====================================================== WARNING: possible circular locking dependency detected 4.16.0+ #3 Not tainted ------------------------------------------------------ kworker/u4:6/3951 is trying to acquire lock: 00000000261f9423 ((console_sem).lock){-...}, at: down_trylock+0x13/0x70 kernel/locking/semaphore.c:136 but task is already holding lock: 00000000b174a2ee (&p->pi_lock){-.-.}, at: try_to_wake_up+0xca/0x11a0 kernel/sched/core.c:1963 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/0x11a0 kernel/sched/core.c:1963 wake_up_process+0x10/0x20 kernel/sched/core.c:2126 __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:2433 con_write+0x25/0xc0 drivers/tty/vt/vt.c:2782 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/0x880 fs/read_write.c:485 vfs_write+0x1f8/0x560 fs/read_write.c:549 ksys_write+0xf9/0x250 fs/read_write.c:598 SYSC_write fs/read_write.c:610 [inline] SyS_write+0x24/0x30 fs/read_write.c:607 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 -> #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+0x249/0x2f0 arch/x86/kernel/traps.c:558 general_protection+0x25/0x50 arch/x86/entry/entry_64.S:1155 __delayacct_blkio_end+0x4f/0xc0 kernel/delayacct.c:82 delayacct_blkio_end include/linux/delayacct.h:128 [inline] try_to_wake_up+0xa96/0x11a0 kernel/sched/core.c:2034 default_wake_function+0x30/0x50 kernel/sched/core.c:3743 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:2992 bio_endio+0x4b8/0x920 block/bio.c:1775 req_bio_endio block/blk-core.c:208 [inline] blk_update_request+0x3a3/0xcb0 block/blk-core.c:2990 scsi_end_request+0xd3/0x870 drivers/scsi/scsi_lib.c:660 scsi_io_completion+0xcb2/0x1a20 drivers/scsi/scsi_lib.c:868 scsi_finish_command+0x542/0x8d0 drivers/scsi/scsi.c:248 scsi_softirq_done+0x3d9/0x4b0 drivers/scsi/scsi_lib.c:1653 __blk_mq_complete_request+0x4c8/0x9f0 block/blk-mq.c:559 blk_mq_complete_request+0x2a5/0x370 block/blk-mq.c:644 scsi_mq_done+0xe2/0x430 drivers/scsi/scsi_lib.c:1964 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:951 __handle_irq_event_percpu+0x1c0/0xad0 kernel/irq/handle.c:147 handle_irq_event_percpu+0x98/0x1c0 kernel/irq/handle.c:187 handle_irq_event+0xa7/0x135 kernel/irq/handle.c:204 handle_edge_irq+0x20f/0x870 kernel/irq/chip.c:793 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:238 ret_from_intr+0x0/0x1e update_stack_state+0x3e8/0x670 arch/x86/kernel/unwind_frame.c:208 unwind_next_frame.part.7+0x1a9/0x9c0 arch/x86/kernel/unwind_frame.c:329 unwind_next_frame+0x3e/0x50 arch/x86/kernel/unwind_frame.c:287 __save_stack_trace+0x6e/0xd0 arch/x86/kernel/stacktrace.c:44 save_stack_trace+0x1a/0x20 arch/x86/kernel/stacktrace.c:60 save_stack+0x43/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:552 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:489 slab_post_alloc_hook mm/slab.h:443 [inline] slab_alloc mm/slab.c:3380 [inline] __do_kmalloc mm/slab.c:3704 [inline] __kmalloc+0x137/0x760 mm/slab.c:3715 kmalloc include/linux/slab.h:517 [inline] load_elf_binary+0x79f/0x55e0 fs/binfmt_elf.c:757 search_binary_handler+0x17d/0x570 fs/exec.c:1638 exec_binprm fs/exec.c:1680 [inline] do_execveat_common.isra.34+0x1574/0x23f0 fs/exec.c:1802 do_execve+0x31/0x40 fs/exec.c:1847 call_usermodehelper_exec_async+0x464/0x930 kernel/umh.c:100 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:411 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 *** 6 locks held by kworker/u4:6/3951: #0: 000000008279e81b (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds+0x53/0x120 fs/exec.c:1389 #1: 00000000ed188ee8 (&(&virtscsi_vq->vq_lock)->rlock){-.-.}, at: virtscsi_vq_done+0x9d/0x170 drivers/scsi/virtio_scsi.c:219 #2: 0000000093972409 (rcu_read_lock){....}, at: hctx_lock+0x7a/0x1d0 block/blk-mq.c:578 #3: 000000002905e5e9 (bit_wait_table + i){-.-.}, at: __wake_up_common_lock+0x190/0x300 kernel/sched/wait.c:118 #4: 00000000b174a2ee (&p->pi_lock){-.-.}, at: try_to_wake_up+0xca/0x11a0 kernel/sched/core.c:1963 #5: 0000000093972409 (rcu_read_lock){....}, at: atomic_notifier_call_chain+0x0/0x190 include/linux/compiler.h:188 stack backtrace: CPU: 0 PID: 3951 Comm: kworker/u4:6 Not tainted 4.16.0+ #3 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b9/0x29f lib/dump_stack.c:53 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+0x346b/0x5130 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+0x249/0x2f0 arch/x86/kernel/traps.c:558 general_protection+0x25/0x50 arch/x86/entry/entry_64.S:1155 RIP: 0010:__delayacct_blkio_end+0x4f/0xc0 kernel/delayacct.c:82 RSP: 0018:ffff8801db006aa0 EFLAGS: 00010002 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffff8801b1b804a0 RDX: 0000000000000007 RSI: ffffffff817804f1 RDI: 0000000000000038 RBP: ffff8801db006ab8 R08: ffffed003b6046c3 R09: 0000000000000001 R10: ffff8801db006b48 R11: ffff8801db023613 R12: ffff8801997422c0 R13: ffff8801b1b80440 R14: ffff8801b1b804a4 R15: 0000000000000002 delayacct_blkio_end include/linux/delayacct.h:128 [inline] try_to_wake_up+0xa96/0x11a0 kernel/sched/core.c:2034 default_wake_function+0x30/0x50 kernel/sched/core.c:3743 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 ? bio_disassociate_task+0x167 Lost 145 message(s)! ---[ end trace 9bd8035d231c382e ]---