INFO: task syz-executor3:18299 blocked for more than 140 seconds. Not tainted 4.20.0+ #2 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor3 D25088 18299 7429 0x00000004 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x897/0x1e90 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: 0033:0x43f1c1 Code: 48 89 47 10 48 8d 05 ae 00 00 00 48 89 47 18 48 8b 05 db 8c 21 00 48 89 47 20 48 8b 05 b0 8b 21 00 48 89 47 28 48 8b 05 d5 8b <21> 00 48 89 47 40 48 8b 05 ea 8c 21 00 48 89 47 30 48 8b 05 2f 8c RSP: 002b:00007ffc0b964408 EFLAGS: 00010202 RAX: 0000000020000300 RBX: 000000000073c900 RCX: 000000000000002f RDX: 0000000000000011 RSI: 00000000007401a0 RDI: 0000000020000300 RBP: 000000000073c900 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffc0b9644d0 R11: 0000000000000246 R12: 00000000000003e8 R13: fffffffffffffffe R14: 00000000000f29f6 R15: 000000000073bfac INFO: task syz-executor3:18319 blocked for more than 140 seconds. Not tainted 4.20.0+ #2 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor3 D26560 18319 7429 0x00000004 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x897/0x1e90 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:3321 [inline] kvm_dev_ioctl+0x11b1/0x1a60 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3373 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: 0033:0x457ec9 Code: Bad RIP value. RSP: 002b:00007f0b398e1c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457ec9 RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000003 RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0b398e26d4 R13: 00000000004c0a0f R14: 00000000004d22f0 R15: 00000000ffffffff INFO: task syz-executor3:18325 blocked for more than 140 seconds. Not tainted 4.20.0+ #2 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor3 D24736 18325 7429 0x80000004 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x897/0x1e90 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 exit_mm kernel/exit.c:511 [inline] do_exit+0x4f5/0x2650 kernel/exit.c:854 do_group_exit+0x177/0x430 kernel/exit.c:970 get_signal+0x8b4/0x19b0 kernel/signal.c:2517 do_signal+0x91/0x1e80 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x2f7/0x3b0 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x696/0x800 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457ec9 Code: Bad RIP value. RSP: 002b:00007f0b398c0cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 000000000073c048 RCX: 0000000000457ec9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000073c048 RBP: 000000000073c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000073c04c R13: 00007ffc0b96438f R14: 00007f0b398c19c0 R15: 000000000073c04c Showing all locks held in the system: 1 lock held by khungtaskd/1033: #0: 00000000dfac36d8 (rcu_read_lock){....}, at: debug_show_all_locks+0xc6/0x41d kernel/locking/lockdep.c:4389 1 lock held by rsyslogd/7294: #0: 00000000c564a00f (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1b3/0x1f0 fs/file.c:795 2 locks held by getty/7384: #0: 00000000838b7d49 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000d10a740a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/7385: #0: 0000000072d97fc2 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000819dbfae (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/7386: #0: 000000005260ce99 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000964a0633 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/7387: #0: 00000000ce147573 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000a83cd3d2 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/7388: #0: 000000002f21b7be (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000000fc08cd3 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/7389: #0: 000000009df2a78b (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000009cf2d731 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/7390: #0: 00000000d92bc0c4 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000000965b910 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 1 lock held by syz-executor3/18299: #0: 000000003e74ef37 (&mm->mmap_sem){++++}, at: do_user_addr_fault arch/x86/mm/fault.c:1426 [inline] #0: 000000003e74ef37 (&mm->mmap_sem){++++}, at: __do_page_fault+0x9c2/0xd60 arch/x86/mm/fault.c:1541 1 lock held by syz-executor3/18304: 1 lock held by syz-executor3/18319: #0: 000000003e74ef37 (&mm->mmap_sem){++++}, at: do_mmu_notifier_register+0x548/0x740 mm/mmu_notifier.c:256 1 lock held by syz-executor3/18325: #0: 000000003e74ef37 (&mm->mmap_sem){++++}, at: exit_mm kernel/exit.c:511 [inline] #0: 000000003e74ef37 (&mm->mmap_sem){++++}, at: do_exit+0x4f5/0x2650 kernel/exit.c:854 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1033 Comm: khungtaskd Not tainted 4.20.0+ #2 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:205 [inline] watchdog+0xbd2/0x10b0 kernel/hung_task.c:289 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: INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.511 msecs NMI backtrace for cpu 0 CPU: 0 PID: 18304 Comm: syz-executor3 Not tainted 4.20.0+ #2 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:lookup_chain_cache include/linux/compiler.h:191 [inline] RIP: 0010:lookup_chain_cache_add kernel/locking/lockdep.c:2267 [inline] RIP: 0010:validate_chain kernel/locking/lockdep.c:2321 [inline] RIP: 0010:__lock_acquire+0xd9e/0x4a30 kernel/locking/lockdep.c:3338 Code: 8d ac 24 a0 01 00 00 48 8b 1c f5 00 f7 04 8b 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c 02 00 0f 85 06 2d 00 00 <49> c1 ed 03 48 85 db 49 be 00 00 00 00 00 fc ff df 48 89 9c 24 a0 RSP: 0000:ffff8880ae607750 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: ffffffff8ab1dfa8 RCX: ffff888053978ac0 RDX: 1ffff11015cc0f1e RSI: 00000000000006bc RDI: 0000000000000000 RBP: ffff8880ae6079e0 R08: 0000000000000002 R09: ffff888053978b30 R10: ffff888053978b10 R11: 0000000000000001 R12: ffff888053978240 R13: ffff8880ae6078f0 R14: 0000000000000020 R15: 17cc08f31db89764 FS: 00007f0b39903700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000092f5b0 CR3: 0000000093cf0000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x1db/0x570 kernel/locking/lockdep.c:3841 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline] _raw_spin_lock_irq+0x60/0x80 kernel/locking/spinlock.c:160 __run_timers+0x121/0xd50 kernel/time/timer.c:1657 run_timer_softirq+0x88/0xb0 kernel/time/timer.c:1696 __do_softirq+0x30b/0xb11 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1b7/0x760 arch/x86/kernel/apic/apic.c:1062 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:lock_release+0x90/0xc40 kernel/locking/lockdep.c:3850 Code: f1 49 8d be 7c 08 00 00 c7 40 04 f1 f1 04 f2 c7 40 08 00 f2 f2 f2 c7 40 0c 00 f3 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 45 d0 <31> c0 48 89 f8 48 c1 e8 03 0f b6 14 10 48 89 f8 83 e0 07 83 c0 03 RSP: 0000:ffff888050fde678 EFLAGS: 00000296 ORIG_RAX: ffffffffffffff13 RAX: 62fd355eeddf1e00 RBX: 1ffff1100a1fbcd6 RCX: 1ffff1100a1fbce1 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff888053978abc RBP: ffff888050fde778 R08: 1ffff11015cc5b8f R09: ffffed1015cc5b90 R10: ffffed1015cc5b8f R11: ffff8880ae62dc7b R12: ffffffff8999f2c0 R13: ffffffff81cb12f9 R14: ffff888053978240 R15: ffff888050fde750 rcu_lock_release include/linux/rcupdate.h:228 [inline] rcu_read_unlock_sched include/linux/rcupdate.h:736 [inline] percpu_ref_put_many+0x141/0x270 include/linux/percpu-refcount.h:287 percpu_ref_put include/linux/percpu-refcount.h:301 [inline] css_put include/linux/cgroup.h:389 [inline] mem_cgroup_try_charge+0x47f/0xdb0 mm/memcontrol.c:5915 __add_to_page_cache_locked+0x6f4/0x1730 mm/filemap.c:812 add_to_page_cache_lru+0x314/0xd20 mm/filemap.c:886 mpage_readpages+0x4cb/0x920 fs/mpage.c:399 blkdev_readpages+0x2d/0x40 fs/block_dev.c:604 read_pages+0x119/0x650 mm/readahead.c:123 __do_page_cache_readahead+0x5ce/0x800 mm/readahead.c:209 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+0xed/0x670 mm/memory.c:2997 do_read_fault mm/memory.c:3409 [inline] do_fault mm/memory.c:3535 [inline] handle_pte_fault mm/memory.c:3766 [inline] __handle_mm_fault+0x3797/0x5690 mm/memory.c:3890 handle_mm_fault+0x4ec/0xc80 mm/memory.c:3927 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:do_strncpy_from_user lib/strncpy_from_user.c:45 [inline] RIP: 0010:strncpy_from_user+0x21f/0x440 lib/strncpy_from_user.c:118 Code: bf 07 00 00 00 49 83 c4 08 48 89 de e8 8a b1 df fd 48 83 fb 07 0f 86 75 01 00 00 e8 db af df fd 45 31 f6 48 8b 85 70 ff ff ff <4e> 8b 3c 20 31 ff 44 89 f6 e8 43 b1 df fd 45 85 f6 0f 84 5e ff ff RSP: 0018:ffff888050fdfc38 EFLAGS: 00010246 RAX: 0000000020000040 RBX: 0000000000000fe0 RCX: ffffc9000be01000 RDX: 0000000000000273 RSI: ffffffff83a1d1d5 RDI: 0000000000000007 RBP: ffff888050fdfce8 R08: ffff888053978240 R09: ffff88821bc49080 R10: 000000000000001c R11: ffff888098d Lost 28 message(s)!