[....] Starting enhanced syslogd: rsyslogd[ 12.140633] audit: type=1400 audit(1513529263.495:5): avc: denied { syslog } for pid=2992 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: [ 17.180645] audit: type=1400 audit(1513529268.535:6): avc: denied { map } for pid=3130 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-2,10.128.0.16' (ECDSA) to the list of known hosts. [ 56.350488] audit: type=1400 audit(1513529307.705:7): avc: denied { map } for pid=3148 comm="syz-execprog" path="/root/syz-execprog" dev="sda1" ino=16479 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 2017/12/17 16:48:27 parsed 1 programs 2017/12/17 16:48:27 executed programs: 0 [ 56.461806] audit: type=1400 audit(1513529307.816:8): avc: denied { map } for pid=3148 comm="syz-execprog" path="/root/syzkaller-shm427589201" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1 [ 56.496275] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 56.523513] kasan: CONFIG_KASAN_INLINE enabled [ 56.528126] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 56.535478] general protection fault: 0000 [#1] SMP KASAN [ 56.540980] Dumping ftrace buffer: [ 56.544481] (ftrace buffer empty) [ 56.548158] Modules linked in: [ 56.551320] CPU: 0 PID: 3156 Comm: syz-executor0 Not tainted 4.15.0-rc2-mm1+ #39 [ 56.558813] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 56.568141] RIP: 0010:native_write_cr4+0x4/0x10 [ 56.572771] RSP: 0018:ffff8801c49275a0 EFLAGS: 00010093 [ 56.578100] RAX: ffff8801c491a340 RBX: 00000000001606f0 RCX: ffffffff811a2d22 [ 56.585337] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 56.592570] RBP: ffff8801c49275a0 R08: ffff8801c4927150 R09: ffff8801c491a340 [ 56.599802] R10: ffff8801c4927510 R11: ffffed0038924e2c R12: 0000000000000093 [ 56.607045] R13: ffff8801c491a340 R14: ffff8801db21a130 R15: ffff8801db21a130 [ 56.614280] FS: 000000000169a940(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 56.622472] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 56.628320] CR2: 00007ff5565b8000 CR3: 0000000006225003 CR4: 00000000001626f0 [ 56.635559] Call Trace: [ 56.638113] hardware_disable+0x34a/0x4b0 [ 56.642238] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 56.646706] kvm_arch_hardware_disable+0x35/0xd0 [ 56.651426] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 56.655885] hardware_disable_nolock+0x30/0x40 [ 56.660438] on_each_cpu+0xca/0x1b0 [ 56.664029] hardware_disable_all_nolock+0x3e/0x50 [ 56.668921] kvm_put_kvm+0x956/0xde0 [ 56.672603] ? kvm_clear_guest+0xb0/0xb0 [ 56.676628] ? lock_downgrade+0x980/0x980 [ 56.680780] ? do_raw_spin_trylock+0x190/0x190 [ 56.685336] ? _raw_spin_unlock_irq+0x27/0x70 [ 56.689798] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 56.694780] ? kvm_irqfd_release+0xdd/0x120 [ 56.699065] ? kvm_irqfd_release+0xdd/0x120 [ 56.703351] ? kvm_put_kvm+0xde0/0xde0 [ 56.707202] kvm_vm_release+0x42/0x50 [ 56.710968] __fput+0x333/0x7f0 [ 56.714215] ? fput+0x140/0x140 [ 56.717460] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 56.723306] ? _raw_spin_unlock_irq+0x27/0x70 [ 56.727769] ____fput+0x15/0x20 [ 56.731015] task_work_run+0x199/0x270 [ 56.734868] ? task_work_cancel+0x210/0x210 [ 56.739158] ? _raw_spin_unlock+0x22/0x30 [ 56.743271] ? switch_task_namespaces+0x87/0xc0 [ 56.747906] do_exit+0x9bb/0x1ae0 [ 56.751326] ? ttwu_do_wakeup+0x4d0/0x710 [ 56.755440] ? mm_update_next_owner+0x930/0x930 [ 56.761291] ? do_raw_spin_trylock+0x190/0x190 [ 56.765837] ? do_raw_spin_trylock+0x190/0x190 [ 56.770388] ? trace_hardirqs_off+0xd/0x10 [ 56.774592] ? _raw_spin_unlock_irqrestore+0xa6/0xba [ 56.779658] ? check_noncircular+0x20/0x20 [ 56.783873] ? migrate_swap_stop+0x970/0x970 [ 56.788245] ? SyS_futex+0x2d3/0x390 [ 56.791936] ? find_held_lock+0x39/0x1d0 [ 56.795968] ? lock_downgrade+0x980/0x980 [ 56.800080] ? do_group_exit+0x1fe/0x400 [ 56.804108] ? wake_up_state+0xb/0x10 [ 56.807874] ? signal_wake_up_state+0x3a/0x40 [ 56.812334] ? zap_other_threads+0x1ca/0x240 [ 56.816709] ? do_raw_spin_trylock+0x190/0x190 [ 56.821256] ? force_sig+0x30/0x30 [ 56.824761] ? _raw_spin_unlock_irq+0x27/0x70 [ 56.829225] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 56.834209] do_group_exit+0x149/0x400 [ 56.838065] ? do_futex+0x2280/0x2280 [ 56.841830] ? SyS_exit+0x30/0x30 [ 56.845252] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 56.850719] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 56.855444] SyS_exit_group+0x1d/0x20 [ 56.859211] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 56.863928] RIP: 0033:0x452a09 [ 56.867080] RSP: 002b:00007ffc97fc2638 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7 [ 56.874752] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000452a09 [ 56.881986] RDX: 000000000000021e RSI: 0000000000722830 RDI: 0000000000000000 [ 56.889220] RBP: 0000000000000008 R08: 0000000000000000 R09: 0000000000000000 [ 56.896460] R10: 0000000000000000 R11: 0000000000000202 R12: fffffffffffffffe [ 56.903692] R13: ffffffffffffffff R14: 0000000020e21ff8 R15: 0000000000000000 [ 56.912151] 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 [ 56.931217] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c49275a0 [ 56.937328] ---[ end trace e3daaf524cf4e00a ]--- [ 56.942047] Kernel panic - not syncing: Fatal exception [ 56.948570] Dumping ftrace buffer: [ 56.952079] (ftrace buffer empty) [ 56.955758] Kernel Offset: disabled [ 56.959350] Rebooting in 86400 seconds..