[....] Starting enhanced syslogd: rsyslogd[ 12.000368] audit: type=1400 audit(1513539030.194:5): avc: denied { syslog } for pid=2990 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: [ 17.525567] audit: type=1400 audit(1513539035.719:6): avc: denied { map } for pid=3129 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-0,10.128.0.63' (ECDSA) to the list of known hosts. executing program executing program [ 23.812549] audit: type=1400 audit(1513539042.006:7): avc: denied { map } for pid=3143 comm="syzkaller952440" path="/root/syzkaller952440057" 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 [ 23.870383] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 24.009619] kasan: CONFIG_KASAN_INLINE enabled [ 24.014293] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 24.021635] general protection fault: 0000 [#1] SMP KASAN [ 24.027184] Dumping ftrace buffer: [ 24.030701] (ftrace buffer empty) [ 24.034387] Modules linked in: [ 24.037564] CPU: 0 PID: 3147 Comm: syzkaller952440 Not tainted 4.15.0-rc2-mm1+ #39 [ 24.045246] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.054585] RIP: 0010:native_write_cr4+0x4/0x10 [ 24.059219] RSP: 0018:ffff8801c561f5a0 EFLAGS: 00010093 [ 24.064551] RAX: ffff8801c57be3c0 RBX: 00000000001606f0 RCX: ffffffff811a2d22 [ 24.071793] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 24.079031] RBP: ffff8801c561f5a0 R08: ffff8801c561f150 R09: ffff8801c57be3c0 [ 24.086280] R10: ffff8801c561f510 R11: ffffed0038ac3e2c R12: 0000000000000093 [ 24.093517] R13: ffff8801c57be3c0 R14: ffff8801db21a130 R15: ffff8801db21a130 [ 24.100754] FS: 0000000001ea9880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 24.108953] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.114801] CR2: 0000000002630df8 CR3: 0000000006225002 CR4: 00000000001626f0 [ 24.122037] Call Trace: [ 24.124593] hardware_disable+0x34a/0x4b0 [ 24.128718] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 24.133179] kvm_arch_hardware_disable+0x35/0xd0 [ 24.137898] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 24.142356] hardware_disable_nolock+0x30/0x40 [ 24.146903] on_each_cpu+0xca/0x1b0 [ 24.150495] hardware_disable_all_nolock+0x3e/0x50 [ 24.155386] kvm_put_kvm+0x956/0xde0 [ 24.159069] ? kvm_clear_guest+0xb0/0xb0 [ 24.163097] ? lock_downgrade+0x980/0x980 [ 24.167217] ? do_raw_spin_trylock+0x190/0x190 [ 24.171767] ? _raw_spin_unlock_irq+0x27/0x70 [ 24.176226] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.181208] ? kvm_irqfd_release+0xdd/0x120 [ 24.185493] ? kvm_irqfd_release+0xdd/0x120 [ 24.189779] ? kvm_put_kvm+0xde0/0xde0 [ 24.193629] kvm_vm_release+0x42/0x50 [ 24.197409] __fput+0x333/0x7f0 [ 24.200660] ? fput+0x140/0x140 [ 24.203911] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 24.209770] ? _raw_spin_unlock_irq+0x27/0x70 [ 24.214236] ____fput+0x15/0x20 [ 24.217482] task_work_run+0x199/0x270 [ 24.221335] ? task_work_cancel+0x210/0x210 [ 24.225624] ? _raw_spin_unlock+0x22/0x30 [ 24.229736] ? switch_task_namespaces+0x87/0xc0 [ 24.234372] do_exit+0x9bb/0x1ae0 [ 24.237793] ? hrtimer_try_to_cancel+0x51/0x5c0 [ 24.242434] ? mm_update_next_owner+0x930/0x930 [ 24.247070] ? __hrtimer_get_remaining+0x1c0/0x1c0 [ 24.251964] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 24.257824] ? _do_fork+0x2ae/0xf10 [ 24.261417] ? rcu_note_context_switch+0x710/0x710 [ 24.266309] ? fork_idle+0x2d0/0x2d0 [ 24.269987] ? __might_sleep+0x95/0x190 [ 24.273929] ? do_nanosleep+0x4fc/0x6e0 [ 24.277870] ? schedule_timeout_idle+0x90/0x90 [ 24.282423] ? memset+0x31/0x40 [ 24.285668] ? hrtimer_nanosleep+0x2cc/0x860 [ 24.290040] ? nanosleep_copyout+0x100/0x100 [ 24.294413] ? __might_sleep+0x95/0x190 [ 24.298353] ? kasan_check_write+0x14/0x20 [ 24.302560] ? _copy_from_user+0x99/0x110 [ 24.306674] ? __hrtimer_init+0x140/0x140 [ 24.310789] ? syscall_return_slowpath+0x550/0x550 [ 24.315683] do_group_exit+0x149/0x400 [ 24.319535] ? SyS_exit+0x30/0x30 [ 24.322959] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.327940] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 24.332661] SyS_exit_group+0x1d/0x20 [ 24.336429] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 24.341150] RIP: 0033:0x448ff9 [ 24.344307] RSP: 002b:00007ffd4efeb208 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7 [ 24.351979] RAX: ffffffffffffffda RBX: 00007f5025941700 RCX: 0000000000448ff9 [ 24.359217] RDX: 0000000000474191 RSI: 0000000000000000 RDI: 0000000000000000 [ 24.366460] RBP: 00007ffd4efeb1b0 R08: 00000000006dd1c0 R09: 0000000000000000 [ 24.373696] R10: 00000000006dd144 R11: 0000000000000202 R12: 0000000000000000 [ 24.380932] R13: 00007ffd4efeb1af R14: 00007f50259419c0 R15: 0000000000000000 [ 24.388183] 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 [ 24.407260] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c561f5a0 [ 24.413379] ---[ end trace 185bfe3bb896493c ]--- [ 24.418100] Kernel panic - not syncing: Fatal exception [ 24.423468] Dumping ftrace buffer: [ 24.426974] (ftrace buffer empty) [ 24.430651] Kernel Offset: disabled [ 24.434244] Rebooting in 86400 seconds..