INFO: task syz-executor5:17850 blocked for more than 140 seconds. Not tainted 5.0.0-rc3+ #41 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D26456 17850 28441 0x00000004 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3472 schedule+0xfe/0x350 kernel/sched/core.c:3516 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:280 [inline] rwsem_down_read_failed+0x360/0x6d0 kernel/locking/rwsem-xadd.c:297 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] down_read+0x9b/0x120 kernel/locking/rwsem.c:26 do_user_addr_fault arch/x86/mm/fault.c:1426 [inline] __do_page_fault+0x9c2/0xd60 arch/x86/mm/fault.c:1541 do_page_fault+0xe6/0x7d8 arch/x86/mm/fault.c:1572 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1143 RIP: 0033:0x400610 Code: Bad RIP value. RSP: 002b:00007fff5bce7d50 EFLAGS: 00010206 RAX: 0000000020000080 RBX: 000000000073c040 RCX: 00000000200000c8 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000020000080 RBP: fffffffffffffffe R08: 0000000000000000 R09: 0000000000000000 R10: 00007fff5bce7e40 R11: 0000000000000246 R12: 000000000073c04c R13: 000000000073c04c R14: 0000000000000003 R15: 0000000000000002 INFO: task syz-executor5:17865 blocked for more than 140 seconds. Not tainted 5.0.0-rc3+ #41 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D24744 17865 28441 0x00000004 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3472 schedule+0xfe/0x350 kernel/sched/core.c:3516 __rwsem_down_write_failed_common+0xa4d/0x1620 kernel/locking/rwsem-xadd.c:577 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:606 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0xa5/0x130 kernel/locking/rwsem.c:72 do_mmu_notifier_register+0x548/0x740 mm/mmu_notifier.c:256 mmu_notifier_register+0x23/0x30 mm/mmu_notifier.c:307 kvm_init_mmu_notifier arch/x86/kvm/../../../virt/kvm/kvm_main.c:511 [inline] kvm_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:679 [inline] kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:3325 [inline] kvm_dev_ioctl+0x11b1/0x1a60 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3377 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0x107b/0x17d0 fs/ioctl.c:696 ksys_ioctl+0xab/0xd0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458099 Code: Bad RIP value. RSP: 002b:00007f11e7decc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458099 RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000003 RBP: 000000000073c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f11e7ded6d4 R13: 00000000004c0bef R14: 00000000004d27d0 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/1040: #0: 0000000008cf38fd (rcu_read_lock){....}, at: debug_show_all_locks+0xc6/0x41d kernel/locking/lockdep.c:4389 1 lock held by kswapd0/1550: 1 lock held by rsyslogd/7857: #0: 000000000d3ad89c (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1b3/0x1f0 fs/file.c:795 2 locks held by getty/7979: #0: 00000000c655587f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000051cfdb71 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/7980: #0: 00000000b2ccfd31 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000044acd99a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/7981: #0: 00000000aacf527f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000a6474cbf (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/7982: #0: 00000000c6bdac93 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000001682fb8e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/7983: #0: 000000007e7c6051 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000001152e827 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/7984: #0: 000000006cec399e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000b6f407d0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/7985: #0: 000000008d15dc0c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000009a54886d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by syz-executor4/17056: #0: 00000000952b4011 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000004148f426 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 1 lock held by syz-executor5/17850: #0: 00000000d5c30d7c (&mm->mmap_sem){++++}, at: do_user_addr_fault arch/x86/mm/fault.c:1426 [inline] #0: 00000000d5c30d7c (&mm->mmap_sem){++++}, at: __do_page_fault+0x9c2/0xd60 arch/x86/mm/fault.c:1541 3 locks held by syz-executor5/17855: 1 lock held by syz-executor5/17861: #0: 00000000d5c30d7c (&mm->mmap_sem){++++}, at: exit_mm kernel/exit.c:511 [inline] #0: 00000000d5c30d7c (&mm->mmap_sem){++++}, at: do_exit+0x4ea/0x26e0 kernel/exit.c:854 1 lock held by syz-executor5/17865: #0: 00000000d5c30d7c (&mm->mmap_sem){++++}, at: do_mmu_notifier_register+0x548/0x740 mm/mmu_notifier.c:256 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1040 Comm: khungtaskd Not tainted 5.0.0-rc3+ #41 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+0x1db/0x2d0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1be/0x236 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0xbbb/0x1170 kernel/hung_task.c:287 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 17855 Comm: syz-executor5 Not tainted 5.0.0-rc3+ #41 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.856 msecs RIP: 0010:native_apic_msr_write+0x0/0x80 arch/x86/include/asm/apic.h:205 Code: 20 81 92 89 48 89 55 e0 48 89 75 e8 e8 f9 b9 8f 00 48 8b 55 e0 48 8b 75 e8 eb 9f 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 <89> f8 83 e0 ef 83 f8 20 74 0b 8d 87 30 ff ff ff 83 e0 ef 75 01 c3 RSP: 0018:ffff8880ae607dc0 EFLAGS: 00000046 RAX: ffffffff813643e0 RBX: ffffffff895664a0 RCX: 0000000000000020 RDX: 1ffffffff12acc96 RSI: 0000000000000149 RDI: 0000000000000380 RBP: ffff8880ae607dd8 R08: ffff888046b7e600 R09: ffffffff8a9ad01d R10: ffffffff8a9ad010 R11: 0000000000000001 R12: ffff8880ae61f140 R13: 0000000000000149 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f11e7e2f700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000006b61e0 CR3: 00000000a060e000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: clockevents_program_event+0x266/0x380 kernel/time/clockevents.c:334 tick_program_event+0xb4/0x130 kernel/time/tick-oneshot.c:44 hrtimer_interrupt+0x369/0x770 kernel/time/hrtimer.c:1522 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline] smp_apic_timer_interrupt+0x18d/0x760 arch/x86/kernel/apic/apic.c:1060 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:766 [inline] RIP: 0010:rmqueue_pcplist mm/page_alloc.c:3055 [inline] RIP: 0010:rmqueue mm/page_alloc.c:3072 [inline] RIP: 0010:get_page_from_freelist+0x2a99/0x5220 mm/page_alloc.c:3497 Code: 15 e4 ff 48 8b 85 10 fa ff ff 80 38 00 0f 85 d4 1d 00 00 48 83 3d 66 3e ee 07 00 0f 84 48 08 00 00 48 8b bd d0 f9 ff ff 57 9d <0f> 1f 44 00 00 e9 cb df ff ff 0f 0b e9 32 e9 ff ff 48 8b bd f0 fa RSP: 0018:ffff88809f63d4c8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: fffffbfff132502e RBX: 0000000000000001 RCX: 1ffff11008d6fdde RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000286 RBP: ffff88809f63db20 R08: 0000000000000007 R09: ffff888046b7eef0 R10: ffff888046b7e600 R11: 0000000000000000 R12: 0000000000000005 R13: ffffea0005c213c8 R14: 0000000000000000 R15: dffffc0000000000 __alloc_pages_slowpath+0x466/0x2cc0 mm/page_alloc.c:4258 __alloc_pages_nodemask+0xa37/0xdc0 mm/page_alloc.c:4555 alloc_pages_current+0x107/0x210 mm/mempolicy.c:2106 alloc_pages include/linux/gfp.h:509 [inline] __page_cache_alloc mm/filemap.c:924 [inline] __page_cache_alloc+0x3cd/0x620 mm/filemap.c:909 __do_page_cache_readahead+0x267/0x800 mm/readahead.c:193 ra_submit mm/internal.h:66 [inline] do_sync_mmap_readahead mm/filemap.c:2432 [inline] filemap_fault+0xd9e/0x2640 mm/filemap.c:2508 __do_fault+0x176/0x7b0 mm/memory.c:3019 do_read_fault mm/memory.c:3430 [inline] do_fault mm/memory.c:3556 [inline] handle_pte_fault mm/memory.c:3787 [inline] __handle_mm_fault+0x370a/0x55a0 mm/memory.c:3911 handle_mm_fault+0x4ec/0xc80 mm/memory.c:3948 do_user_addr_fault arch/x86/mm/fault.c:1475 [inline] __do_page_fault+0x5da/0xd60 arch/x86/mm/fault.c:1541 do_page_fault+0xe6/0x7d8 arch/x86/mm/fault.c:1572 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1143 RIP: 0010:copy_user_generic_unrolled+0x9e/0xc0 arch/x86/lib/copy_user_64.S:75 Code: 48 8d 7f 40 ff c9 75 b6 89 d1 83 e2 07 c1 e9 03 74 12 4c 8b 06 4c 89 07 48 8d 76 08 48 8d 7f 08 ff c9 75 ee 21 d2 74 10 89 d1 <8a> 06 88 07 48 ff c6 48 ff c7 ff c9 75 f2 31 c0 0f 1f 00 c3 0f 1f RSP: 0018:ffff88809f63eb60 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 00000000000000f9 RCX: 0000000000000002 RDX: 0000000000000002 RSI: 00000000200000f9 RDI: ffff88809a096010 RBP: ffff88809f63eb90 R08: ffff888046b7e600 R09: ffff8880a886e340 R10: 0000000000000000 R11: ffff88809a096011 R12: 0000000000000002 R13: ffff88809a096010 R14: 0000000020000000 R15: 0000000000000002 kvm_vcpu_read_guest_page arch/x86/kvm/../../../virt/kvm/kvm_main.c:1843 [inline] kvm_vcpu_read_guest+0x65/0xe0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1875 read_emulate+0x2c/0x50 arch/x86/kvm/x86.c:5307 emulator_read_write_onepage+0x4aa/0x1000 arch/x86/kvm/x86.c:5382 emulator_read_write+0x1ba/0x5a0 arch/x86/kvm/x86.c:5437 emulator_read_emulated+0x3c/0x50 arch/x86/kvm/x86.c:5464 read_emulated arch/x86/kvm/emulate.c:1408 [inline] segmented_read+0x219/0x380 arch/x86/kvm/emulate.c:1432 emulate_pop+0x233/0x3a0 arch/x86/kvm/emulate.c:1860 em_pop_sreg+0xaa/0x270 arch/x86/kvm/emulate.c:1971 ? __saniti Lost 84 message(s)!