[....] Starting enhanced syslogd: rsyslogd[ 13.733112] audit: type=1400 audit(1516414873.732:5): avc: denied { syslog } for pid=3506 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: [ 18.312126] audit: type=1400 audit(1516414878.311:6): avc: denied { map } for pid=3645 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 '10.128.0.18' (ECDSA) to the list of known hosts. executing program [ 24.649462] audit: type=1400 audit(1516414884.649:7): avc: denied { map } for pid=3659 comm="syzkaller582847" path="/root/syzkaller582847888" 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 [ 24.683454] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 24.703757] kasan: CONFIG_KASAN_INLINE enabled [ 24.708363] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 24.715703] general protection fault: 0000 [#1] SMP KASAN [ 24.721216] Dumping ftrace buffer: [ 24.724723] (ftrace buffer empty) [ 24.728403] Modules linked in: [ 24.731567] CPU: 0 PID: 3659 Comm: syzkaller582847 Not tainted 4.15.0-rc8+ #269 [ 24.738986] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.748320] RIP: 0010:native_write_cr4+0x4/0x10 [ 24.752957] RSP: 0018:ffff8801bc3b75a0 EFLAGS: 00010093 [ 24.758289] RAX: ffff8801bbc9c440 RBX: 00000000001606f0 RCX: ffffffff811a32b2 [ 24.765527] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 24.772774] RBP: ffff8801bc3b75a0 R08: 1ffff10037876e0f R09: 0000000000000004 [ 24.780023] R10: ffff8801bc3b7510 R11: 0000000000000004 R12: 0000000000000093 [ 24.787266] R13: ffff8801bbc9c440 R14: ffff8801db21d130 R15: ffff8801db21d130 [ 24.794507] FS: 0000000001f28880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 24.802701] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.808552] CR2: 0000000000000000 CR3: 0000000006822002 CR4: 00000000001626f0 [ 24.815794] Call Trace: [ 24.818356] hardware_disable+0x34a/0x4b0 [ 24.822476] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 24.826940] kvm_arch_hardware_disable+0x35/0xd0 [ 24.831663] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 24.836127] hardware_disable_nolock+0x30/0x40 [ 24.840677] on_each_cpu+0xca/0x1b0 [ 24.844273] hardware_disable_all_nolock+0x3e/0x50 [ 24.849170] kvm_put_kvm+0x956/0xdf0 [ 24.852857] ? kvm_clear_guest+0xb0/0xb0 [ 24.856890] ? kvm_irqfd_release+0xd1/0x120 [ 24.861187] ? lock_downgrade+0x980/0x980 [ 24.865313] ? _raw_spin_unlock_irq+0x27/0x70 [ 24.869780] ? kvm_irqfd_release+0xdd/0x120 [ 24.874069] ? kvm_irqfd_release+0xdd/0x120 [ 24.878364] ? kvm_put_kvm+0xdf0/0xdf0 [ 24.882220] kvm_vm_release+0x42/0x50 [ 24.885993] __fput+0x327/0x7e0 [ 24.889247] ? fput+0x140/0x140 [ 24.892495] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 24.898353] ? _raw_spin_unlock_irq+0x27/0x70 [ 24.902821] ____fput+0x15/0x20 [ 24.906071] task_work_run+0x199/0x270 [ 24.909931] ? task_work_cancel+0x210/0x210 [ 24.914223] ? _raw_spin_unlock+0x22/0x30 [ 24.918340] ? switch_task_namespaces+0x87/0xc0 [ 24.922983] do_exit+0x9bb/0x1ad0 [ 24.926407] ? trace_event_raw_event_kvm_age_page+0x340/0x340 [ 24.932264] ? mm_update_next_owner+0x930/0x930 [ 24.936904] ? mntput_no_expire+0x15e/0xa90 [ 24.941677] ? _raw_spin_unlock+0x22/0x30 [ 24.945800] ? mnt_get_count+0x150/0x150 [ 24.949835] ? find_held_lock+0x35/0x1d0 [ 24.953868] ? task_work_run+0x16c/0x270 [ 24.957897] ? lock_downgrade+0x980/0x980 [ 24.962016] ? mntput+0x66/0x90 [ 24.965268] ? lock_release+0xa40/0xa40 [ 24.969214] ? do_raw_spin_trylock+0x190/0x190 [ 24.973767] ? _raw_spin_unlock_irq+0x27/0x70 [ 24.978242] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.983229] ? trace_hardirqs_on+0xd/0x10 [ 24.987347] ? _raw_spin_unlock_irq+0x27/0x70 [ 24.991811] ? task_work_run+0x1f4/0x270 [ 24.995845] ? task_work_cancel+0x210/0x210 [ 25.000137] ? trace_event_raw_event_kvm_age_page+0x340/0x340 [ 25.005991] ? do_vfs_ioctl+0x486/0x1520 [ 25.010032] ? ioctl_preallocate+0x2b0/0x2b0 [ 25.014415] ? selinux_capable+0x40/0x40 [ 25.018445] ? __close_fd+0x222/0x360 [ 25.022218] do_group_exit+0x149/0x400 [ 25.026076] ? SyS_exit+0x30/0x30 [ 25.029499] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.034486] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 25.039210] SyS_exit_group+0x1d/0x20 [ 25.042980] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 25.047704] RIP: 0033:0x441c38 [ 25.050863] RSP: 002b:00007ffcf1496778 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 25.058538] RAX: ffffffffffffffda RBX: 00007ffcf1495330 RCX: 0000000000441c38 [ 25.065778] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 25.073022] RBP: 0000000000000006 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 25.080263] R10: 0000000000000012 R11: 0000000000000246 R12: 0000000000000000 [ 25.087503] R13: 0000000000000004 R14: 0000000000000004 R15: 0000000020829000 [ 25.094752] 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 [ 25.113824] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801bc3b75a0 [ 25.119940] ---[ end trace 92b90175d44b7916 ]--- [ 25.124662] Kernel panic - not syncing: Fatal exception [ 25.130473] Dumping ftrace buffer: [ 25.133987] (ftrace buffer empty) [ 25.137665] Kernel Offset: disabled [ 25.141261] Rebooting in 86400 seconds..