[....] Starting enhanced syslogd: rsyslogd[ 13.563993] audit: type=1400 audit(1516797569.761:5): avc: denied { syslog } for pid=3507 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: [ 17.222422] audit: type=1400 audit(1516797573.420:6): avc: denied { map } for pid=3644 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 '10.128.15.231' (ECDSA) to the list of known hosts. executing program executing program [ 24.476659] audit: type=1400 audit(1516797580.674:7): avc: denied { map } for pid=3659 comm="syzkaller584319" path="/root/syzkaller584319533" 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 [ 24.510423] 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 [ 24.985936] kasan: CONFIG_KASAN_INLINE enabled [ 24.990594] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 24.997935] general protection fault: 0000 [#1] SMP KASAN [ 25.003446] Dumping ftrace buffer: [ 25.006954] (ftrace buffer empty) [ 25.010632] Modules linked in: [ 25.013797] CPU: 1 PID: 3729 Comm: syzkaller584319 Not tainted 4.15.0-rc9+ #277 [ 25.021226] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.030562] RIP: 0010:native_write_cr4+0x4/0x10 [ 25.035216] RSP: 0018:ffff8801c33ff068 EFLAGS: 00010093 [ 25.040562] RAX: ffff8801d5a78640 RBX: 00000000001606e0 RCX: ffffffff811a32b2 [ 25.047804] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606e0 [ 25.055049] RBP: ffff8801c33ff068 R08: 1ffff1003867fd69 R09: 0000000000000004 [ 25.062297] R10: ffff8801c33fefd8 R11: 0000000000000004 R12: 0000000000000093 [ 25.069539] R13: ffff8801d5a78640 R14: ffff8801db31d130 R15: ffff8801db31d130 [ 25.076781] FS: 00007f1137e5e700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 25.084977] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.090838] CR2: 00007f068b43a000 CR3: 0000000006822001 CR4: 00000000001626e0 [ 25.098092] Call Trace: [ 25.100743] hardware_disable+0x34a/0x4b0 [ 25.104867] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 25.109335] kvm_arch_hardware_disable+0x35/0xd0 [ 25.114063] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 25.118530] hardware_disable_nolock+0x30/0x40 [ 25.123095] on_each_cpu+0xca/0x1b0 [ 25.126705] hardware_disable_all_nolock+0x3e/0x50 [ 25.131607] kvm_put_kvm+0x956/0xdf0 [ 25.135295] ? kvm_clear_guest+0xb0/0xb0 [ 25.139332] ? kvm_irqfd_release+0xd1/0x120 [ 25.143627] ? lock_downgrade+0x980/0x980 [ 25.147756] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.152225] ? kvm_irqfd_release+0xdd/0x120 [ 25.156520] ? kvm_irqfd_release+0xdd/0x120 [ 25.160825] ? kvm_put_kvm+0xdf0/0xdf0 [ 25.164770] kvm_vm_release+0x42/0x50 [ 25.168557] __fput+0x327/0x7e0 [ 25.171809] ? fput+0x140/0x140 [ 25.175064] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.180920] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.185392] ____fput+0x15/0x20 [ 25.188645] task_work_run+0x199/0x270 [ 25.192506] ? task_work_cancel+0x210/0x210 [ 25.196799] ? _raw_spin_unlock+0x22/0x30 [ 25.200918] ? switch_task_namespaces+0x87/0xc0 [ 25.205561] do_exit+0x9bb/0x1ad0 [ 25.209000] ? mm_update_next_owner+0x930/0x930 [ 25.213651] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 25.218812] ? __might_sleep+0x95/0x190 [ 25.222761] ? find_held_lock+0x35/0x1d0 [ 25.226798] ? futex_wait+0x402/0x9a0 [ 25.230573] ? lock_downgrade+0x980/0x980 [ 25.234694] ? __unqueue_futex+0x1c0/0x290 [ 25.238899] ? lock_release+0xa40/0xa40 [ 25.242846] ? fault_in_user_writeable+0x90/0x90 [ 25.247575] ? do_raw_spin_trylock+0x190/0x190 [ 25.252130] ? futex_wake+0x680/0x680 [ 25.255915] ? delayed_work_timer_fn+0x90/0x90 [ 25.260470] ? check_noncircular+0x20/0x20 [ 25.264681] ? drop_futex_key_refs.isra.12+0x63/0xb0 [ 25.269757] ? futex_wait+0x6a9/0x9a0 [ 25.273548] ? find_held_lock+0x35/0x1d0 [ 25.277597] ? get_signal+0x7ae/0x16c0 [ 25.281455] ? lock_downgrade+0x980/0x980 [ 25.285577] do_group_exit+0x149/0x400 [ 25.289439] ? do_raw_spin_trylock+0x190/0x190 [ 25.293992] ? SyS_exit+0x30/0x30 [ 25.297423] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.301904] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.306896] get_signal+0x73f/0x16c0 [ 25.310588] ? ptrace_notify+0x130/0x130 [ 25.314640] ? exit_robust_list+0x240/0x240 [ 25.318936] ? find_held_lock+0x35/0x1d0 [ 25.322972] ? __fget+0x333/0x570 [ 25.326398] ? lock_downgrade+0x980/0x980 [ 25.330526] do_signal+0x90/0x1eb0 [ 25.334039] ? __lock_is_held+0xb6/0x140 [ 25.338077] ? setup_sigcontext+0x7d0/0x7d0 [ 25.342377] ? __fget+0x35c/0x570 [ 25.345808] ? iterate_fd+0x3f0/0x3f0 [ 25.349591] ? exit_to_usermode_loop+0x8c/0x310 [ 25.354236] exit_to_usermode_loop+0x214/0x310 [ 25.358788] ? ioctl_preallocate+0x2b0/0x2b0 [ 25.363171] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 25.368690] ? selinux_capable+0x40/0x40 [ 25.372730] syscall_return_slowpath+0x490/0x550 [ 25.377456] ? prepare_exit_to_usermode+0x340/0x340 [ 25.382444] ? entry_SYSCALL_64_fastpath+0x73/0xa0 [ 25.387359] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.392360] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 25.397094] entry_SYSCALL_64_fastpath+0x9e/0xa0 [ 25.401820] RIP: 0033:0x445d29 [ 25.404982] RSP: 002b:00007f1137e5dda8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 25.412665] RAX: fffffffffffffe00 RBX: 00000000006dbc24 RCX: 0000000000445d29 [ 25.419908] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000006dbc24 [ 25.427148] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 25.434390] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc20 [ 25.441630] R13: 6d766b2f7665642f R14: 0030656c69662f2e R15: 000000000000000b [ 25.448889] Code: 0f 1f 80 00 00 00 00 55 48 89 e5 0f 20 d8 5d c3 0f 1f 80 00 00 00 00 55 48 89 e5 0f 22 df 5d c3 0f 1f 80 00 00 00 00 55 48 89 e5 <0f> 22 e7 5d c3 0f 1f 80 00 00 00 00 55 48 89 e5 44 0f 20 c0 5d [ 25.467969] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c33ff068 [ 25.474087] ---[ end trace 617f6870c309f250 ]--- [ 25.478813] Kernel panic - not syncing: Fatal exception [ 25.484595] Dumping ftrace buffer: [ 25.488133] (ftrace buffer empty) [ 25.491816] Kernel Offset: disabled [ 25.495426] Rebooting in 86400 seconds..