[....] Starting enhanced syslogd: rsyslogd[ 11.108471] audit: type=1400 audit(1515252699.343:5): avc: denied { syslog } for pid=3318 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: [ 17.588517] audit: type=1400 audit(1515252705.823:6): avc: denied { map } for pid=3457 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 '10.128.0.32' (ECDSA) to the list of known hosts. executing program [ 23.756979] audit: type=1400 audit(1515252711.991:7): avc: denied { map } for pid=3470 comm="syzkaller325236" path="/root/syzkaller325236553" 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 [ 23.793104] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 23.809904] kasan: CONFIG_KASAN_INLINE enabled [ 23.814510] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 23.821838] general protection fault: 0000 [#1] SMP KASAN [ 23.827340] Dumping ftrace buffer: [ 23.830842] (ftrace buffer empty) [ 23.834520] Modules linked in: [ 23.837679] CPU: 0 PID: 3470 Comm: syzkaller325236 Not tainted 4.15.0-rc6-mm1+ #51 [ 23.845346] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.854673] RIP: 0010:native_write_cr4+0x4/0x10 [ 23.859306] RSP: 0018:ffff8801c06d7b18 EFLAGS: 00010093 [ 23.864644] RAX: ffff8801c06e6040 RBX: 00000000001606f0 RCX: ffffffff8115d7c2 [ 23.871878] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 23.879112] RBP: ffff8801c06d7b18 R08: ffffffff8105f787 R09: 0000000000000004 [ 23.886346] R10: ffff8801c06d7b30 R11: 0000000000000001 R12: 0000000000000093 [ 23.893579] R13: ffff8801c06e6040 R14: ffff8801db41d130 R15: ffff8801db41d130 [ 23.900813] FS: 00000000018af880(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 23.909004] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.914862] CR2: 0000000000000000 CR3: 0000000005e22005 CR4: 00000000001626f0 [ 23.922102] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.929334] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.936573] Call Trace: [ 23.939130] hardware_disable+0x34a/0x4b0 [ 23.943244] ? smp_call_function_many+0x76/0x6e0 [ 23.947976] ? lock_acquire+0x16b/0x420 [ 23.952416] ? kvm_io_bus_get_dev+0x1b0/0x1b0 [ 23.956890] kvm_arch_hardware_disable+0x35/0xd0 [ 23.961611] ? kvm_io_bus_get_dev+0x1b0/0x1b0 [ 23.966068] hardware_disable_nolock+0x30/0x40 [ 23.970614] on_each_cpu+0xca/0x1b0 [ 23.974205] hardware_disable_all_nolock+0x3e/0x50 [ 23.979097] kvm_put_kvm+0x69c/0xa70 [ 23.982774] ? kvm_irqfd_release+0xdd/0x120 [ 23.987060] ? kvm_put_kvm+0xa70/0xa70 [ 23.990912] kvm_vm_release+0x42/0x50 [ 23.994678] __fput+0x291/0x6e0 [ 23.997924] ____fput+0x15/0x20 [ 24.001167] task_work_run+0x122/0x1a0 [ 24.005030] do_exit+0x7f4/0x2da0 [ 24.008452] ? _raw_spin_unlock_irqrestore+0xa6/0xba [ 24.013522] ? mm_update_next_owner+0x690/0x690 [ 24.018159] ? do_group_exit+0x2a2/0x320 [ 24.022185] ? lock_downgrade+0x860/0x860 [ 24.026297] ? _raw_spin_unlock_irq+0x27/0x70 [ 24.030757] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.035741] do_group_exit+0x108/0x320 [ 24.039603] SyS_exit_group+0x1d/0x20 [ 24.043371] entry_SYSCALL_64_fastpath+0x23/0x9a [ 24.048092] RIP: 0033:0x4470a8 [ 24.051255] RSP: 002b:00007fff40a355b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 24.058925] RAX: ffffffffffffffda RBX: 00007f1ae8f08700 RCX: 00000000004470a8 [ 24.066167] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 24.073402] RBP: 00007fff40a35550 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 24.080644] R10: 00007fff40a35540 R11: 0000000000000246 R12: 0000000000000000 [ 24.087880] R13: 00007fff40a354bf R14: 00007f1ae8f089c0 R15: 0000000000000001 [ 24.095129] 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 [ 24.114181] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c06d7b18 [ 24.120293] ---[ end trace 6b6d585adfaffcc9 ]--- [ 24.125014] Kernel panic - not syncing: Fatal exception [ 24.130877] Dumping ftrace buffer: [ 24.134387] (ftrace buffer empty) [ 24.138062] Kernel Offset: disabled [ 24.141651] Rebooting in 86400 seconds..