[....] Starting enhanced syslogd: rsyslogd[ 11.803070] audit: type=1400 audit(1513568229.259:5): avc: denied { syslog } for pid=2986 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: [ 17.144634] audit: type=1400 audit(1513568234.601:6): avc: denied { map } for pid=3126 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-mmots-kasan-gce-6,10.128.0.31' (ECDSA) to the list of known hosts. executing program [ 33.484273] audit: type=1400 audit(1513568250.941:7): avc: denied { map } for pid=3144 comm="syzkaller819927" path="/root/syzkaller819927096" 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 [ 33.516871] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 33.533500] kasan: CONFIG_KASAN_INLINE enabled [ 33.538088] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 33.545418] general protection fault: 0000 [#1] SMP KASAN [ 33.550920] Dumping ftrace buffer: [ 33.554421] (ftrace buffer empty) [ 33.558093] Modules linked in: [ 33.561251] CPU: 0 PID: 3144 Comm: syzkaller819927 Not tainted 4.15.0-rc2-mm1+ #39 [ 33.568920] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.578247] RIP: 0010:native_write_cr4+0x4/0x10 [ 33.582887] RSP: 0018:ffff8801c4f5f5a0 EFLAGS: 00010093 [ 33.588213] RAX: ffff8801c4fba0c0 RBX: 00000000001606f0 RCX: ffffffff811a2d22 [ 33.595447] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 33.602680] RBP: ffff8801c4f5f5a0 R08: ffff8801c4f5f150 R09: ffff8801c4fba0c0 [ 33.609918] R10: ffff8801c4f5f510 R11: ffffed00389ebe2c R12: 0000000000000093 [ 33.617152] R13: ffff8801c4fba0c0 R14: ffff8801db21a130 R15: ffff8801db21a130 [ 33.624389] FS: 0000000000936880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 33.632577] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.638424] CR2: 0000000000000000 CR3: 0000000006225006 CR4: 00000000001626f0 [ 33.645663] Call Trace: [ 33.648217] hardware_disable+0x34a/0x4b0 [ 33.652333] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 33.656793] kvm_arch_hardware_disable+0x35/0xd0 [ 33.661509] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 33.665968] hardware_disable_nolock+0x30/0x40 [ 33.670516] on_each_cpu+0xca/0x1b0 [ 33.674118] hardware_disable_all_nolock+0x3e/0x50 [ 33.679010] kvm_put_kvm+0x956/0xde0 [ 33.682693] ? kvm_clear_guest+0xb0/0xb0 [ 33.686719] ? lock_downgrade+0x980/0x980 [ 33.690839] ? do_raw_spin_trylock+0x190/0x190 [ 33.695388] ? _raw_spin_unlock_irq+0x27/0x70 [ 33.699846] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 33.704827] ? kvm_irqfd_release+0xdd/0x120 [ 33.709113] ? kvm_irqfd_release+0xdd/0x120 [ 33.713398] ? kvm_put_kvm+0xde0/0xde0 [ 33.717249] kvm_vm_release+0x42/0x50 [ 33.721015] __fput+0x333/0x7f0 [ 33.724259] ? fput+0x140/0x140 [ 33.727503] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 33.733354] ? _raw_spin_unlock_irq+0x27/0x70 [ 33.737820] ____fput+0x15/0x20 [ 33.741064] task_work_run+0x199/0x270 [ 33.744916] ? task_work_cancel+0x210/0x210 [ 33.749200] ? _raw_spin_unlock+0x22/0x30 [ 33.753311] ? switch_task_namespaces+0x87/0xc0 [ 33.757947] do_exit+0x9bb/0x1ae0 [ 33.761363] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 33.766605] ? mm_update_next_owner+0x930/0x930 [ 33.771242] ? find_held_lock+0x39/0x1d0 [ 33.775272] ? lock_downgrade+0x980/0x980 [ 33.779385] ? task_work_run+0xa5/0x270 [ 33.783325] ? mntput+0x66/0x90 [ 33.786567] ? lock_release+0xda0/0xda0 [ 33.790513] ? do_raw_spin_trylock+0x190/0x190 [ 33.795062] ? _raw_spin_unlock_irq+0x27/0x70 [ 33.799534] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 33.804520] ? trace_hardirqs_on+0xd/0x10 [ 33.808646] ? _raw_spin_unlock_irq+0x27/0x70 [ 33.813104] ? task_work_run+0x1f4/0x270 [ 33.817131] ? task_work_cancel+0x210/0x210 [ 33.821416] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 33.826656] ? do_vfs_ioctl+0x492/0x1530 [ 33.830685] ? ioctl_preallocate+0x2b0/0x2b0 [ 33.835061] ? selinux_capable+0x40/0x40 [ 33.839087] ? __close_fd+0x222/0x360 [ 33.842852] do_group_exit+0x149/0x400 [ 33.846705] ? SyS_exit+0x30/0x30 [ 33.850120] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 33.855098] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 33.859818] SyS_exit_group+0x1d/0x20 [ 33.863585] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 33.868300] RIP: 0033:0x441c08 [ 33.871453] RSP: 002b:00007ffccc2fef38 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 33.879121] RAX: ffffffffffffffda RBX: 00007ffccc2fdaf0 RCX: 0000000000441c08 [ 33.886355] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 33.893589] RBP: 0000000000000006 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 33.900823] R10: 0000000000000012 R11: 0000000000000246 R12: 0000000000000000 [ 33.908056] R13: 0000000000000004 R14: 0000000000000004 R15: 0000000020aad000 [ 33.915295] 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 [ 33.934354] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c4f5f5a0 [ 33.940465] ---[ end trace 4e6ae4c6dd561e40 ]--- [ 33.945184] Kernel panic - not syncing: Fatal exception [ 33.950537] Dumping ftrace buffer: [ 33.954041] (ftrace buffer empty) [ 33.957715] Kernel Offset: disabled [ 33.961306] Rebooting in 86400 seconds..