[....] Starting enhanced syslogd: rsyslogd[ 10.472171] audit: type=1400 audit(1515053910.959:5): avc: denied { syslog } for pid=3312 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: [ 13.220985] audit: type=1400 audit(1515053913.708:6): avc: denied { map } for pid=3451 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 '10.128.0.35' (ECDSA) to the list of known hosts. executing program executing program [ 19.416243] audit: type=1400 audit(1515053919.904:7): avc: denied { map } for pid=3465 comm="syzkaller771874" path="/root/syzkaller771874611" 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 [ 19.452247] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 19.498598] kasan: CONFIG_KASAN_INLINE enabled [ 19.503232] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 19.510578] general protection fault: 0000 [#1] SMP KASAN [ 19.516085] Dumping ftrace buffer: [ 19.519589] (ftrace buffer empty) [ 19.523267] Modules linked in: [ 19.526431] CPU: 0 PID: 3471 Comm: syzkaller771874 Not tainted 4.15.0-rc6-mm1+ #50 [ 19.534102] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 19.543429] RIP: 0010:native_write_cr4+0x4/0x10 [ 19.548062] RSP: 0018:ffff8801c053f860 EFLAGS: 00010093 [ 19.553391] RAX: ffff8801c0638140 RBX: 00000000001606f0 RCX: ffffffff8115d7c2 [ 19.560626] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 19.567862] RBP: ffff8801c053f860 R08: ffffffff8105f787 R09: 0000000000000004 [ 19.575109] R10: ffff8801c053f878 R11: 0000000000000001 R12: 0000000000000093 [ 19.582346] R13: ffff8801c0638140 R14: ffff8801db41a130 R15: ffff8801db41a130 [ 19.589584] FS: 00007f9ecfd6a700(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 19.597775] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 19.603622] CR2: 0000000000000000 CR3: 0000000005e22004 CR4: 00000000001626f0 [ 19.610865] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 19.618107] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 19.625344] Call Trace: [ 19.627914] hardware_disable+0x34a/0x4b0 [ 19.632042] ? smp_call_function_many+0x76/0x6e0 [ 19.636765] ? kvm_io_bus_get_dev+0x1b0/0x1b0 [ 19.641230] kvm_arch_hardware_disable+0x35/0xd0 [ 19.645953] ? kvm_io_bus_get_dev+0x1b0/0x1b0 [ 19.650414] hardware_disable_nolock+0x30/0x40 [ 19.654964] on_each_cpu+0xca/0x1b0 [ 19.658566] hardware_disable_all_nolock+0x3e/0x50 [ 19.663460] kvm_put_kvm+0x69c/0xa70 [ 19.667151] ? kvm_put_kvm+0xa70/0xa70 [ 19.671010] kvm_vm_release+0x42/0x50 [ 19.674781] __fput+0x291/0x6e0 [ 19.678031] ____fput+0x15/0x20 [ 19.681278] task_work_run+0x122/0x1a0 [ 19.685139] do_exit+0x7f4/0x2da0 [ 19.688571] ? mm_update_next_owner+0x690/0x690 [ 19.693216] ? find_held_lock+0x35/0x1e0 [ 19.697251] ? get_signal+0x644/0x1460 [ 19.701106] ? lock_downgrade+0x860/0x860 [ 19.705232] do_group_exit+0x108/0x320 [ 19.709090] get_signal+0x5e9/0x1460 [ 19.712783] do_signal+0x7f/0x1980 [ 19.716291] ? find_held_lock+0x35/0x1e0 [ 19.720324] ? find_held_lock+0x35/0x1e0 [ 19.724354] ? setup_sigcontext+0x7d0/0x7d0 [ 19.728645] ? kvm_vcpu_fault+0x3d0/0x3d0 [ 19.732761] ? do_vfs_ioctl+0x439/0xfe0 [ 19.736702] ? selinux_file_ioctl+0x354/0x540 [ 19.741172] ? lock_downgrade+0x860/0x860 [ 19.745297] ? SyS_futex+0x1fd/0x2b0 [ 19.748979] ? exit_to_usermode_loop+0x3f/0x210 [ 19.753616] exit_to_usermode_loop+0x1aa/0x210 [ 19.758165] syscall_return_slowpath+0x383/0x430 [ 19.762891] entry_SYSCALL_64_fastpath+0x98/0x9a [ 19.767613] RIP: 0033:0x448a49 [ 19.770769] RSP: 002b:00007f9ecfd69da8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 19.778441] RAX: fffffffffffffe00 RBX: 00000000006ddc3c RCX: 0000000000448a49 [ 19.785697] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000006ddc3c [ 19.792944] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 19.800182] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006ddc38 [ 19.807419] R13: 6d766b2f7665642f R14: 00007f9ecfd6a9c0 R15: 0000000000000007 [ 19.814661] 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 [ 19.833728] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c053f860 [ 19.839840] ---[ end trace 31a6261e0042988d ]--- [ 19.844563] Kernel panic - not syncing: Fatal exception [ 19.850360] Dumping ftrace buffer: [ 19.853866] (ftrace buffer empty) [ 19.857543] Kernel Offset: disabled [ 19.861135] Rebooting in 86400 seconds..