[....] Starting enhanced syslogd: rsyslogd[ 10.771178] audit: type=1400 audit(1514619984.364:5): avc: denied { syslog } for pid=3039 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: [ 16.533092] audit: type=1400 audit(1514619990.126:6): avc: denied { map } for pid=3179 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 '10.128.0.29' (ECDSA) to the list of known hosts. executing program [ 38.697344] audit: type=1400 audit(1514620012.291:7): avc: denied { map } for pid=3197 comm="syzkaller756645" path="/root/syzkaller756645256" 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 [ 38.729952] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 38.741907] kasan: CONFIG_KASAN_INLINE enabled [ 38.746501] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 38.753859] general protection fault: 0000 [#1] SMP KASAN [ 38.759362] Dumping ftrace buffer: [ 38.762865] (ftrace buffer empty) [ 38.766543] Modules linked in: [ 38.769704] CPU: 0 PID: 3197 Comm: syzkaller756645 Not tainted 4.15.0-rc5+ #241 [ 38.777113] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.786462] RIP: 0010:native_write_cr4+0x4/0x10 [ 38.791091] RSP: 0018:ffff8801c7a5f5a0 EFLAGS: 00010093 [ 38.796417] RAX: ffff8801c7b8c1c0 RBX: 00000000001606f0 RCX: ffffffff811a2f12 [ 38.803658] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 38.810900] RBP: ffff8801c7a5f5a0 R08: 1ffff10038f4be0f R09: 0000000000000004 [ 38.818136] R10: ffff8801c7a5f510 R11: 0000000000000004 R12: 0000000000000093 [ 38.825379] R13: ffff8801c7b8c1c0 R14: ffff8801db215850 R15: ffff8801db215850 [ 38.832616] FS: 0000000000f79880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 38.840808] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.846657] CR2: 0000000020e12ffc CR3: 0000000006022006 CR4: 00000000001626f0 [ 38.853894] Call Trace: [ 38.856452] hardware_disable+0x34a/0x4b0 [ 38.860573] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 38.865039] kvm_arch_hardware_disable+0x35/0xd0 [ 38.869768] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 38.874230] hardware_disable_nolock+0x30/0x40 [ 38.878778] on_each_cpu+0xca/0x1b0 [ 38.882373] hardware_disable_all_nolock+0x3e/0x50 [ 38.887272] kvm_put_kvm+0x956/0xdf0 [ 38.890958] ? kvm_clear_guest+0xb0/0xb0 [ 38.894988] ? kvm_irqfd_release+0xd1/0x120 [ 38.899277] ? lock_downgrade+0x980/0x980 [ 38.903398] ? _raw_spin_unlock_irq+0x27/0x70 [ 38.907862] ? kvm_irqfd_release+0xdd/0x120 [ 38.912150] ? kvm_irqfd_release+0xdd/0x120 [ 38.916436] ? kvm_put_kvm+0xdf0/0xdf0 [ 38.920287] kvm_vm_release+0x42/0x50 [ 38.924053] __fput+0x327/0x7e0 [ 38.927300] ? fput+0x140/0x140 [ 38.930548] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 38.936394] ? _raw_spin_unlock_irq+0x27/0x70 [ 38.940864] ____fput+0x15/0x20 [ 38.944112] task_work_run+0x199/0x270 [ 38.947968] ? task_work_cancel+0x210/0x210 [ 38.952253] ? _raw_spin_unlock+0x22/0x30 [ 38.956367] ? switch_task_namespaces+0x87/0xc0 [ 38.961011] do_exit+0x9bb/0x1ad0 [ 38.964428] ? __pmd_alloc+0x4e0/0x4e0 [ 38.968281] ? trace_event_raw_event_kvm_age_page+0x340/0x340 [ 38.974133] ? mm_update_next_owner+0x930/0x930 [ 38.978767] ? find_held_lock+0x35/0x1d0 [ 38.982798] ? handle_mm_fault+0x248/0x8d0 [ 38.987000] ? find_held_lock+0x35/0x1d0 [ 38.991042] ? __do_page_fault+0x5f7/0xc90 [ 38.995935] ? lock_downgrade+0x980/0x980 [ 39.000049] ? down_read_trylock+0xdb/0x170 [ 39.004333] ? __do_page_fault+0x32d/0xc90 [ 39.008536] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 39.013082] ? vmacache_find+0x5f/0x280 [ 39.017023] ? up_read+0x1a/0x40 [ 39.020364] ? __do_page_fault+0x3d6/0xc90 [ 39.024570] ? mm_fault_error+0x2c0/0x2c0 [ 39.028681] ? trace_event_raw_event_kvm_age_page+0x340/0x340 [ 39.034532] ? do_vfs_ioctl+0x486/0x1520 [ 39.038562] ? _cond_resched+0x14/0x30 [ 39.042416] ? __fget_light+0x297/0x380 [ 39.046356] ? fget_raw+0x20/0x20 [ 39.049775] ? __do_page_fault+0xc90/0xc90 [ 39.053973] ? putname+0xf3/0x130 [ 39.057395] do_group_exit+0x149/0x400 [ 39.061247] ? SyS_exit+0x30/0x30 [ 39.064667] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 39.069658] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 39.074386] SyS_exit_group+0x1d/0x20 [ 39.078151] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 39.082870] RIP: 0033:0x43e988 [ 39.086024] RSP: 002b:00007fff1e131438 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 39.093698] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043e988 [ 39.100931] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 39.108167] RBP: 00000000006ca018 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 39.115408] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004016b0 [ 39.122660] R13: 0000000000401740 R14: 0000000000000000 R15: 0000000000000000 [ 39.129903] 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 [ 39.148970] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c7a5f5a0 [ 39.155083] ---[ end trace 56ff984861277cbe ]--- [ 39.159803] Kernel panic - not syncing: Fatal exception [ 39.165160] Dumping ftrace buffer: [ 39.168664] (ftrace buffer empty) [ 39.172342] Kernel Offset: disabled [ 39.175934] Rebooting in 86400 seconds..