[....] Starting enhanced syslogd: rsyslogd[ 11.022256] audit: type=1400 audit(1515251991.651:5): avc: denied { syslog } for pid=3306 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] 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: [ 15.727595] audit: type=1400 audit(1515251996.356:6): avc: denied { map } for pid=3446 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 '10.128.0.58' (ECDSA) to the list of known hosts. executing program [ 21.868882] audit: type=1400 audit(1515252002.497:7): avc: denied { map } for pid=3461 comm="syzkaller160128" path="/root/syzkaller160128263" 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 [ 21.901178] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 21.918923] kasan: CONFIG_KASAN_INLINE enabled [ 21.923543] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 21.930891] general protection fault: 0000 [#1] SMP KASAN [ 21.936400] Dumping ftrace buffer: [ 21.939912] (ftrace buffer empty) [ 21.943589] Modules linked in: [ 21.946749] CPU: 0 PID: 3462 Comm: syzkaller160128 Not tainted 4.15.0-rc6-next-20180105+ #89 [ 21.955304] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 21.964631] RIP: 0010:native_write_cr4+0x4/0x10 [ 21.969264] RSP: 0018:ffff8801c11efb18 EFLAGS: 00010093 [ 21.974592] RAX: ffff8801c1386740 RBX: 00000000001606f0 RCX: ffffffff8115d7c2 [ 21.981827] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 21.989062] RBP: ffff8801c11efb18 R08: ffffffff8105f787 R09: 0000000000000004 [ 21.996298] R10: ffff8801c11efb30 R11: 0000000000000001 R12: 0000000000000093 [ 22.003532] R13: ffff8801c1386740 R14: ffff8801db41d130 R15: ffff8801db41d130 [ 22.010769] FS: 0000000000cf8880(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 22.018960] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.024808] CR2: 0000000000000000 CR3: 0000000005e22006 CR4: 00000000001626f0 [ 22.032048] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.039284] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.046520] Call Trace: [ 22.049087] hardware_disable+0x34a/0x4b0 [ 22.053210] ? smp_call_function_many+0x76/0x6e0 [ 22.057932] ? lock_acquire+0x16b/0x420 [ 22.061876] ? kvm_io_bus_get_dev+0x1b0/0x1b0 [ 22.066339] kvm_arch_hardware_disable+0x35/0xd0 [ 22.071060] ? kvm_io_bus_get_dev+0x1b0/0x1b0 [ 22.075520] hardware_disable_nolock+0x30/0x40 [ 22.080068] on_each_cpu+0xca/0x1b0 [ 22.083659] hardware_disable_all_nolock+0x3e/0x50 [ 22.088553] kvm_put_kvm+0x69c/0xa70 [ 22.092244] ? kvm_irqfd_release+0xdd/0x120 [ 22.096533] ? kvm_put_kvm+0xa70/0xa70 [ 22.100386] kvm_vm_release+0x42/0x50 [ 22.104155] __fput+0x291/0x6e0 [ 22.107403] ____fput+0x15/0x20 [ 22.110647] task_work_run+0x122/0x1a0 [ 22.114503] do_exit+0x7f4/0x2da0 [ 22.117923] ? _raw_spin_unlock_irqrestore+0xa6/0xba [ 22.122995] ? mm_update_next_owner+0x690/0x690 [ 22.127634] ? do_group_exit+0x2a2/0x320 [ 22.131664] ? lock_downgrade+0x860/0x860 [ 22.135779] ? _raw_spin_unlock_irq+0x27/0x70 [ 22.140245] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 22.145235] do_group_exit+0x108/0x320 [ 22.149094] SyS_exit_group+0x1d/0x20 [ 22.152862] entry_SYSCALL_64_fastpath+0x23/0x9a [ 22.157585] RIP: 0033:0x4489f9 [ 22.160741] RSP: 002b:00007ffc19a90828 EFLAGS: 00000206 ORIG_RAX: 00000000000000e7 [ 22.168415] RAX: ffffffffffffffda RBX: 00007f03837eb700 RCX: 00000000004489f9 [ 22.175652] RDX: 00000000004489f9 RSI: 0000000000000001 RDI: 0000000000000000 [ 22.182887] RBP: 00007ffc19a90860 R08: 0000000000000000 R09: 0000000000000000 [ 22.190122] R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 [ 22.197358] R13: 00007ffc19a907cf R14: 00007f03837eb9c0 R15: 0000000000000001 [ 22.204601] 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 [ 22.223655] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c11efb18 [ 22.229768] ---[ end trace a6b5eb5ba42284a5 ]--- [ 22.234487] Kernel panic - not syncing: Fatal exception [ 22.239849] Dumping ftrace buffer: [ 22.243357] (ftrace buffer empty) [ 22.247033] Kernel Offset: disabled [ 22.250624] Rebooting in 86400 seconds..