[....] Starting enhanced syslogd: rsyslogd[ 11.848055] audit: type=1400 audit(1513804796.323:5): avc: denied { syslog } for pid=2999 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 17.087318] audit: type=1400 audit(1513804801.563:6): avc: denied { map } for pid=3139 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added 'ci-upstream-next-kasan-gce-3,10.128.0.33' (ECDSA) to the list of known hosts. net.ipv6.conf.syz3.accept_dad = 0 [ 23.310395] audit: type=1400 audit(1513804807.786:7): avc: denied { map } for pid=3153 comm="syzkaller089891" path="/root/syzkaller089891307" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 net.ipv6.conf.syz4.accept_dad = 0 net.ipv6.conf.syz3.router_solicitations = 0 net.ipv6.conf.syz7.accept_dad = 0 net.ipv6.conf.syz1.accept_dad = 0 net.ipv6.conf.syz4.router_solicitations = 0 net.ipv6.conf.syz5.accept_dad = 0 net.ipv6.conf.syz7.router_solicitations = 0 net.ipv6.conf.syz1.router_solicitations = 0 net.ipv6.conf.syz5.router_solicitations = 0 net.ipv6.conf.syz2.accept_dad = 0 net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz6.accept_dad = 0 net.ipv6.conf.syz2.router_solicitations = 0 net.ipv6.conf.syz0.router_solicitations = 0 net.ipv6.conf.syz6.router_solicitations = 0 executing program executing program executing program executing program [ 23.766738] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 24.108895] kasan: CONFIG_KASAN_INLINE enabled [ 24.114777] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 24.122715] general protection fault: 0000 [#1] SMP KASAN [ 24.128225] Dumping ftrace buffer: [ 24.131731] (ftrace buffer empty) [ 24.135408] Modules linked in: [ 24.138572] CPU: 0 PID: 3477 Comm: syzkaller089891 Not tainted 4.15.0-rc4-next-20171220+ #77 [ 24.147109] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.156441] RIP: 0010:__schedule+0xdf0/0x2060 [ 24.160899] RSP: 0018:ffff8801c46b6cd0 EFLAGS: 00010806 [ 24.166232] RAX: 1bd5a00000000022 RBX: ffff8801db22c900 RCX: ffffffff810caeaf [ 24.173471] RDX: 0000000000000000 RSI: 0000000000000000 RDI: dead000000000110 [ 24.180708] RBP: ffff8801c46b6ea0 R08: 0000000000000000 R09: 1ffff100388d6d6e [ 24.187944] R10: ffff8801c46b6b38 R11: 0000000000000001 R12: ffff8801c8910240 [ 24.195180] R13: dead000000000100 R14: dffffc0000000000 R15: ffff8801c4088300 [ 24.202416] FS: 00007faf9a8c8700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 24.210614] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.216462] CR2: 00007faf9f8d2db8 CR3: 0000000006422005 CR4: 00000000001626f0 [ 24.223700] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.230939] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.238175] Call Trace: [ 24.240741] ? __sched_text_start+0x8/0x8 [ 24.244857] ? do_group_exit+0x149/0x400 [ 24.248899] ? find_held_lock+0x35/0x1d0 [ 24.252941] ? kvm_arch_vcpu_uninit+0xd3/0x1d0 [ 24.257495] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 24.263350] ? free_unref_page+0x9e0/0x9e0 [ 24.267558] preempt_schedule_common+0x22/0x60 [ 24.272110] _cond_resched+0x1d/0x30 [ 24.275789] cpus_read_lock+0x21/0x90 [ 24.279556] static_key_slow_dec+0x4a/0x90 [ 24.283756] kvm_arch_vcpu_uninit+0x18e/0x1d0 [ 24.288221] kvm_vcpu_uninit+0x44/0x90 [ 24.292078] vmx_free_vcpu+0x1c1/0x260 [ 24.295933] kvm_arch_destroy_vm+0x4a2/0x980 [ 24.300318] ? kvm_arch_sync_events+0x30/0x30 [ 24.304780] ? mmdrop+0x18/0x30 [ 24.308031] ? mmu_notifier_unregister+0x437/0x5c0 [ 24.312928] ? kvm_put_kvm+0x47a/0xde0 [ 24.316785] ? mmu_notifier_unregister_no_release+0x3e0/0x3e0 [ 24.322635] ? __free_pages+0x107/0x150 [ 24.326577] ? free_unref_page+0x9e0/0x9e0 [ 24.330780] ? quarantine_put+0xeb/0x190 [ 24.334805] ? kfree+0xf0/0x260 [ 24.338049] ? kvm_put_kvm+0x614/0xde0 [ 24.341905] ? free_pages+0x51/0x90 [ 24.345506] kvm_put_kvm+0x695/0xde0 [ 24.349191] ? kvm_clear_guest+0xb0/0xb0 [ 24.353225] ? kvm_irqfd_release+0xd1/0x120 [ 24.357515] ? lock_downgrade+0x980/0x980 [ 24.361640] ? _raw_spin_unlock_irq+0x27/0x70 [ 24.366110] ? kvm_irqfd_release+0xdd/0x120 [ 24.370398] ? kvm_irqfd_release+0xdd/0x120 [ 24.374686] ? kvm_put_kvm+0xde0/0xde0 [ 24.378542] kvm_vm_release+0x42/0x50 [ 24.382314] __fput+0x327/0x7e0 [ 24.385563] ? fput+0x140/0x140 [ 24.388811] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 24.394664] ? _raw_spin_unlock_irq+0x27/0x70 [ 24.399132] ____fput+0x15/0x20 [ 24.402381] task_work_run+0x199/0x270 [ 24.406240] ? task_work_cancel+0x210/0x210 [ 24.410531] ? _raw_spin_unlock+0x22/0x30 [ 24.414646] ? switch_task_namespaces+0x87/0xc0 [ 24.419286] do_exit+0x9bb/0x1ad0 [ 24.422712] ? mm_update_next_owner+0x930/0x930 [ 24.427353] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 24.432515] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 24.437675] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 24.442839] ? _cond_resched+0x14/0x30 [ 24.446693] ? unmap_page_range+0x928/0x22e0 [ 24.451072] ? check_noncircular+0x20/0x20 [ 24.455283] ? check_noncircular+0x20/0x20 [ 24.459486] ? vm_normal_page_pmd+0x2c0/0x2c0 [ 24.463950] ? check_noncircular+0x20/0x20 [ 24.468151] ? check_noncircular+0x20/0x20 [ 24.472356] ? check_noncircular+0x20/0x20 [ 24.476561] ? find_held_lock+0x35/0x1d0 [ 24.480593] ? get_signal+0x7ae/0x16c0 [ 24.484448] ? lock_downgrade+0x980/0x980 [ 24.488568] do_group_exit+0x149/0x400 [ 24.492426] ? do_raw_spin_trylock+0x190/0x190 [ 24.496973] ? SyS_exit+0x30/0x30 [ 24.500394] ? _raw_spin_unlock_irq+0x27/0x70 [ 24.504860] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.509847] get_signal+0x73f/0x16c0 [ 24.513534] ? ptrace_notify+0x130/0x130 [ 24.517559] ? tlb_flush_mmu_free+0xeb/0x160 [ 24.521943] ? blk_flush_plug_list+0x7e4/0xaf0 [ 24.526489] ? tlb_finish_mmu+0x10f/0x190 [ 24.530602] ? check_noncircular+0x20/0x20 [ 24.534803] ? tlb_gather_mmu+0x70/0x70 [ 24.538744] ? blk_init_request_from_bio+0x440/0x440 [ 24.543825] do_signal+0x94/0x1ee0 [ 24.547336] ? find_held_lock+0x35/0x1d0 [ 24.551368] ? setup_sigcontext+0x7d0/0x7d0 [ 24.555658] ? SyS_madvise+0x9f4/0x13d0 [ 24.559602] ? lock_downgrade+0x980/0x980 [ 24.563718] ? blk_lld_busy+0x60/0x60 [ 24.567489] ? vmacache_update+0xfe/0x130 [ 24.571605] ? find_vma+0x30/0x150 [ 24.575117] ? exit_to_usermode_loop+0x8c/0x2f0 [ 24.579757] exit_to_usermode_loop+0x258/0x2f0 [ 24.584310] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 24.589820] ? madvise_free_pte_range+0x1ea0/0x1ea0 [ 24.594807] syscall_return_slowpath+0x490/0x550 [ 24.599529] ? prepare_exit_to_usermode+0x340/0x340 [ 24.604515] ? entry_SYSCALL_64_fastpath+0x69/0x96 [ 24.609413] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.614395] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 24.619121] entry_SYSCALL_64_fastpath+0x94/0x96 [ 24.623845] RIP: 0033:0x44eee7 [ 24.627002] RSP: 002b:00007faf9a8c7d18 EFLAGS: 00000206 ORIG_RAX: 000000000000001c [ 24.634676] RAX: 0000000000000000 RBX: 00007faf9a8c8700 RCX: 000000000044eee7 [ 24.641912] RDX: 0000000000000004 RSI: 00000000007fb000 RDI: 00007faf9a0c8000 [ 24.649150] RBP: 0000000000000000 R08: 00007faf9a8c8700 R09: 00007faf9a8c8700 [ 24.656386] R10: 00007faf9a8c8700 R11: 0000000000000206 R12: 0000000000000000 [ 24.663621] R13: 00007ffdf6a4a8df R14: 00007faf9a8c89c0 R15: 0000000000000000 [ 24.670870] Code: 08 4c 89 e8 48 c1 e8 03 42 80 3c 30 00 0f 85 ce 0f 00 00 4d 8b 6d 00 4d 85 ed 0f 84 72 f9 ff ff 49 8d 7d 10 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 74 ac eb a5 49 8d bc 24 28 04 00 00 48 b8 00 00 [ 24.689983] RIP: __schedule+0xdf0/0x2060 RSP: ffff8801c46b6cd0 [ 24.695922] [ 24.695925] ====================================================== [ 24.695927] WARNING: possible circular locking dependency detected [ 24.695929] 4.15.0-rc4-next-20171220+ #77 Not tainted [ 24.695931] ------------------------------------------------------ [ 24.695934] syzkaller089891/3477 is trying to acquire lock: [ 24.695935] ((console_sem).lock){..-.}, at: [<000000002d8c272c>] down_trylock+0x13/0x70 [ 24.695940] [ 24.695942] but task is already holding lock: [ 24.695943] (&rq->lock){-.-.}, at: [<000000004723a817>] __schedule+0x24e/0x2060 [ 24.695948] [ 24.695949] which lock already depends on the new lock. [ 24.695950] [ 24.695952] [ 24.695954] the existing dependency chain (in reverse order) is: [ 24.695955] [ 24.695955] -> #2 (&rq->lock){-.-.}: [ 24.695961] _raw_spin_lock+0x2a/0x40 [ 24.695962] task_fork_fair+0x7a/0x690 [ 24.695964] sched_fork+0x435/0xc00 [ 24.695966] copy_process.part.37+0x1758/0x4b60 [ 24.695967] _do_fork+0x1f7/0xf70 [ 24.695969] kernel_thread+0x34/0x40 [ 24.695971] rest_init+0x22/0xf0 [ 24.695972] start_kernel+0x7f1/0x819 [ 24.695974] x86_64_start_reservations+0x2a/0x2c [ 24.695976] x86_64_start_kernel+0x77/0x7a [ 24.695978] secondary_startup_64+0xa5/0xb0 [ 24.695979] [ 24.695979] -> #1 (&p->pi_lock){-.-.}: [ 24.695985] _raw_spin_lock_irqsave+0x96/0xc0 [ 24.695987] try_to_wake_up+0xbc/0x1600 [ 24.695988] wake_up_process+0x10/0x20 [ 24.695990] __up.isra.0+0x1cc/0x2c0 [ 24.695991] up+0x13b/0x1d0 [ 24.695993] __up_console_sem+0xb2/0x1a0 [ 24.695994] console_unlock+0x538/0xd70 [ 24.695996] do_con_write+0x106e/0x1f70 [ 24.695998] con_write+0x25/0xb0 [ 24.695999] n_tty_write+0x5ef/0xec0 [ 24.696001] tty_write+0x3fa/0x840 [ 24.696002] __vfs_write+0xef/0x970 [ 24.696004] vfs_write+0x189/0x510 [ 24.696005] SyS_write+0xef/0x220 [ 24.696007] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 24.696008] [ 24.696009] -> #0 ((console_sem).lock){..-.}: [ 24.696014] lock_acquire+0x1d5/0x580 [ 24.696016] _raw_spin_lock_irqsave+0x96/0xc0 [ 24.696018] down_trylock+0x13/0x70 [ 24.696020] __down_trylock_console_sem+0xa2/0x1e0 [ 24.696021] console_trylock+0x15/0x100 [ 24.696023] vprintk_emit+0x49b/0x590 [ 24.696025] vprintk_default+0x28/0x30 [ 24.696026] vprintk_func+0x57/0xc0 [ 24.696028] printk+0xaa/0xca [ 24.696029] kasan_die_handler+0x31/0x3f [ 24.696031] notifier_call_chain+0x136/0x2c0 [ 24.696033] atomic_notifier_call_chain+0x77/0x140 [ 24.696034] notify_die+0x18c/0x280 [ 24.696036] do_general_protection+0x331/0x3e0 [ 24.696038] general_protection+0x2c/0x60 [ 24.696040] __schedule+0xdf0/0x2060 [ 24.696041] preempt_schedule_common+0x22/0x60 [ 24.696043] _cond_resched+0x1d/0x30 [ 24.696045] cpus_read_lock+0x21/0x90 [ 24.696046] static_key_slow_dec+0x4a/0x90 [ 24.696048] kvm_arch_vcpu_uninit+0x18e/0x1d0 [ 24.696050] kvm_vcpu_uninit+0x44/0x90 [ 24.696052] vmx_free_vcpu+0x1c1/0x260 [ 24.696053] kvm_arch_destroy_vm+0x4a2/0x980 [ 24.696055] kvm_put_kvm+0x695/0xde0 [ 24.696057] kvm_vm_release+0x42/0x50 [ 24.696058] __fput+0x327/0x7e0 [ 24.696059] ____fput+0x15/0x20 [ 24.696061] task_work_run+0x199/0x270 [ 24.696063] do_exit+0x9bb/0x1ad0 [ 24.696064] do_group_exit+0x149/0x400 [ 24.696066] get_signal+0x73f/0x16c0 [ 24.696067] do_signal+0x94/0x1ee0 [ 24.696069] exit_to_usermode_loop+0x258/0x2f0 [ 24.696071] syscall_return_slowpath+0x490/0x550 [ 24.696073] entry_SYSCALL_64_fastpath+0x94/0x96 [ 24.696074] [ 24.696076] other info that might help us debug this: [ 24.696076] [ 24.696078] Chain exists of: [ 24.696079] (console_sem).lock --> &p->pi_lock --> &rq->lock [ 24.696085] [ 24.696087] Possible unsafe locking scenario: [ 24.696088] [ 24.696089] CPU0 CPU1 [ 24.696091] ---- ---- [ 24.696092] lock(&rq->lock); [ 24.696096] lock(&p->pi_lock); [ 24.696099] lock(&rq->lock); [ 24.696102] lock((console_sem).lock); [ 24.696105] [ 24.696106] *** DEADLOCK *** [ 24.696107] [ 24.696109] 2 locks held by syzkaller089891/3477: [ 24.696110] #0: (&rq->lock){-.-.}, at: [<000000004723a817>] __schedule+0x24e/0x2060 [ 24.696116] #1: (rcu_read_lock){....}, at: [<00000000ef659c73>] atomic_notifier_call_chain+0x0/0x140 [ 24.696122] [ 24.696123] stack backtrace: [ 24.696126] CPU: 0 PID: 3477 Comm: syzkaller089891 Not tainted 4.15.0-rc4-next-20171220+ #77 [ 24.696129] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.696131] Call Trace: [ 24.696132] dump_stack+0x194/0x257 [ 24.696134] ? arch_local_irq_restore+0x53/0x53 [ 24.696136] print_circular_bug.isra.37+0x2cd/0x2dc [ 24.696137] ? save_trace+0xe0/0x2b0 [ 24.696139] __lock_acquire+0x30a8/0x3e00 [ 24.696141] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 24.696143] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 24.696145] ? update_cfs_rq_load_avg.part.68+0x2d0/0x2d0 [ 24.696146] ? update_load_avg+0x249/0x2d80 [ 24.696148] ? print_irqtrace_events+0x270/0x270 [ 24.696150] ? update_cfs_rq_load_avg.part.68+0x2d0/0x2d0 [ 24.696152] ? __lock_acquire+0x664/0x3e00 [ 24.696154] ? print_irqtrace_events+0x270/0x270 [ 24.696155] ? __lock_acquire+0x664/0x3e00 [ 24.696157] lock_acquire+0x1d5/0x580 [ 24.696159] ? lock_acquire+0x1d5/0x580 [ 24.696160] ? down_trylock+0x13/0x70 [ 24.696162] ? find_held_lock+0x35/0x1d0 [ 24.696163] ? lock_release+0xa40/0xa40 [ 24.696165] ? vprintk_emit+0x379/0x590 [ 24.696166] ? lock_downgrade+0x980/0x980 [ 24.696168] ? kvm_sched_clock_read+0x25/0x40 [ 24.696170] ? sched_clock+0x31/0x40 [ 24.696171] ? sched_clock_cpu+0x1b/0x170 [ 24.696173] ? vprintk_emit+0x49b/0x590 [ 24.696175] _raw_spin_lock_irqsave+0x96/0xc0 [ 24.696176] ? down_trylock+0x13/0x70 [ 24.696178] down_trylock+0x13/0x70 [ 24.696179] ? vprintk_emit+0x49b/0x590 [ 24.696181] __down_trylock_console_sem+0xa2/0x1e0 [ 24.696183] console_trylock+0x15/0x100 [ 24.696184] vprintk_emit+0x49b/0x590 [ 24.696186] vprintk_default+0x28/0x30 [ 24.696187] vprintk_func+0x57/0xc0 [ 24.696189] printk+0xaa/0xca [ 24.696190] ? show_regs_print_info+0x18/0x18 [ 24.696192] ? kasan_die_handler+0x25/0x3f [ 24.696194] kasan_die_handler+0x31/0x3f [ 24.696195] notifier_call_chain+0x136/0x2c0 [ 24.696197] ? raw_notifier_chain_unregister+0x1b0/0x1b0 [ 24.696199] ? pick_next_task_fair+0xc14/0x16b0 [ 24.696201] ? rcutorture_record_progress+0x10/0x10 [ 24.696203] atomic_notifier_call_chain+0x77/0x140 [ 24.696204] notify_die+0x18c/0x280 [ 24.696206] ? atomic_notifier_call_chain+0x140/0x140 [ 24.696208] ? search_exception_tables+0x47/0x50 [ 24.696210] do_general_protection+0x331/0x3e0 [ 24.696211] general_protection+0x2c/0x60 [ 24.696213] RIP: 0010:__schedule+0xdf0/0x2060 [ 24.696215] RSP: 0018:ffff8801c46b6cd0 EFLAGS: 00010806 [ 24.696219] RAX: 1bd5a00000000022 RBX: ffff8801db22c900 RCX: ffffffff810caeaf [ 24.696221] RDX: 0000000000000000 RSI: 0000000000000000 RDI: dead000000000110 [ 24.696224] RBP: ffff8801c46b6ea0 R08: 0000000000000000 R09: 1ffff100388d6d6e [ 24.696226] R10: ffff8801c46b6b38 R11: 0000000000000001 R12: ffff8801c8910240 [ 24.696229] R13: dead000000000100 R14: dffffc0000000000 R15: ffff8801c4088300 [ 24.696230] ? kvm_arch_vcpu_put+0x2af/0x3f0 [ 24.696232] ? __sched_text_start+0x8/0x8 [ 24.696233] ? do_group_exit+0x149/0x400 [ 24.696235] ? find_held_lock+0x35/0x1d0 [ 24.696237] ? kvm_arch_vcpu_uninit+0xd3/0x1d0 [ 24.696239] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 24.696241] ? free_unref_page+0x9e0/0x9e0 [ 24.696242] preempt_schedule_common+0x22/0x60 [ 24.696244] _cond_resched+0x1d/0x30 [ 24.696246] cpus_read_lock+0x21/0x90 [ 24.696247] static_key_slow_dec+0x4a/0x90 [ 24.696249] kvm_arch_vcpu_uninit+0x18e/0x1d0 [ 24.696250] kvm_vcpu_uninit+0x44/0x90 [ 24.696252] vmx_free_vcpu+0x1c1/0x260 [ 24.696254] kvm_arch_destroy_vm+0x4a2/0x980 [ 24.696256] ? kvm_arch_sync_events+0x30/0x30 [ 24.696257] ? mmdrop+0x18/0x30 [ 24.696259] ? mmu_notifier_unregister+0x437/0x5c0 [ 24.696260] ? kvm_put_kvm+0x47a/0xde0 [ 24.696262] ? mmu_notifier_unregister_no_release+0x3e0/0x3e0 [ 24.696264] ? __free_pages+0x107/0x150 [ 24.696266] ? free_unref_page+0x9e0/0x9e0 [ 24.696267] ? quarantine_put+0xeb/0x190 [ 24.696269] ? kfree+0xf0/0x260 [ 24.696270] ? kvm_put_kvm+0x614/0xde0 [ 24.696272] ? free_pages+0x51/0x90 [ 24.696273] kvm_put_kvm+0x695/0xde0 [ 24.696275] ? kvm_clear_guest+0xb0/0xb0 [ 24.696276] ? kvm_irqfd_release+0xd1/0x120 [ 24.696278] ? lock_downgrade+0x980/0x980 [ 24.696280] ? _raw_spin_unlock_irq+0x27/0x70 [ 24.696281] ? kvm_irqfd_release+0xdd/0x120 [ 24.696283] ? kvm_irqfd_release+0xdd/0x120 [ 24.696285] ? kvm_put_kvm+0xde0/0xde0 [ 24.696286] kvm_vm_release+0x42/0x50 [ 24.696288] __fput+0x327/0x7e0 [ 24.696289] ? fput+0x140/0x140 [ 24.696291] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 24.696293] ? _raw_spin_unlock_irq+0x27/0x70 [ 24.696294] ____fput+0x15/0x20 [ 24.696296] task_work_run+0x199/0x270 [ 24.696297] ? task_work_cancel+0x210/0x210 [ 24.696299] ? _raw_spin_unlock+0x22/0x30 [ 24.696301] ? switch_task_namespaces+0x87/0xc0 [ 24.696302] do_exit+0x9bb/0x1ad0 [ 24.696304] ? mm_update_next_owner+0x930/0x930 [ 24.696306] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 24.696308] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 24.696310] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 24.696311] ? _cond_resched+0x14/0x30 [ 24.696313] ? unmap_page_range+0x928/0x22e0 [ 24.696315] ? check_noncircular+0x20/0x20 [ 24.696316] ? check_noncircular+0x20/0x20 [ 24.696318] ? vm_normal_page_pmd+0x2c0/0x2c0 [ 24.696320] ? check_noncircular+0x20/0x20 [ 24.696321] ? check_noncircular+0x20/0x20 [ 24.696323] ? check_noncircular+0x20/0x20 [ 24.696325] ? find_held_lock+0x35/0x1d0 [ 24.696326] ? get_signal+0x7ae/0x16c0 [ 24.696328] ? lock_downgrade+0x980/0x980 [ 24.696329] do_group_exit+0x149/0x400 [ 24.696331] ? do_raw_spin_trylock+0x190/0x190 [ 24.696333] ? SyS_exit+0x30/0x30 [ 24.696334] ? _raw_spin_unlock_irq+0x27/0x70 [ 24.696336] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.696338] get_signal+0x73f/0x16c0 [ 24.696339] ? ptrace_notify+0x130/0x130 [ 24.696341] ? tlb_flush_mmu_free+0xeb/0x160 [ 24.696343] ? blk_flush_plug_list+0x7e4/0xaf0 [ 24.696344] ? tlb_finish_mmu+0x10f/0x190 [ 24.696346] ? check_noncircular+0x20/0x20 [ 24.696348] ? tlb_gather_mmu+0x70/0x70 [ 24.696350] ? blk_init_request_from_bio+0x440/0x440 [ 24.696351] do_signal+0x94/0x1ee0 [ 24.696353] ? find_held_lock+0x35/0x1d0 [ 24.696354] ? setup_sig [ 24.696357] Lost 23 message(s)! [ 25.737739] ---[ end trace f00c54e6145e05b1 ]--- [ 25.742461] Kernel panic - not syncing: Fatal exception [ 26.817946] Shutting down cpus with NMI [ 26.822368] Dumping ftrace buffer: [ 26.825873] (ftrace buffer empty) [ 26.829549] Kernel Offset: disabled [ 26.833145] Rebooting in 86400 seconds..