[....] Starting enhanced syslogd: rsyslogd[ 10.192967] audit: type=1400 audit(1514250034.794:5): avc: denied { syslog } for pid=2988 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: [ 16.313705] audit: type=1400 audit(1514250040.915:6): 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-0,10.128.15.221' (ECDSA) to the list of known hosts. executing program [ 29.675256] audit: type=1400 audit(1514250054.277:7): avc: denied { map } for pid=3146 comm="syzkaller941707" path="/root/syzkaller941707164" 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 [ 29.707476] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 29.725708] kasan: CONFIG_KASAN_INLINE enabled [ 29.730302] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 29.737641] general protection fault: 0000 [#1] SMP KASAN [ 29.743147] Dumping ftrace buffer: [ 29.746656] (ftrace buffer empty) [ 29.750338] Modules linked in: [ 29.753498] CPU: 0 PID: 3146 Comm: syzkaller941707 Not tainted 4.15.0-rc4-mm1+ #49 [ 29.761166] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.770493] RIP: 0010:native_write_cr4+0x4/0x10 [ 29.775123] RSP: 0018:ffff8801c818f5a0 EFLAGS: 00010093 [ 29.780448] RAX: ffff8801ca29e0c0 RBX: 00000000001606f0 RCX: ffffffff811a4922 [ 29.787683] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 29.794915] RBP: ffff8801c818f5a0 R08: 1ffff10039031e0f R09: 0000000000000004 [ 29.802151] R10: ffff8801c818f510 R11: 0000000000000004 R12: 0000000000000093 [ 29.809384] R13: ffff8801ca29e0c0 R14: ffff8801db21a130 R15: ffff8801db21a130 [ 29.816621] FS: 00000000015e1880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 29.824809] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.830655] CR2: 0000000000000000 CR3: 0000000006422005 CR4: 00000000001626f0 [ 29.837893] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.845127] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.852362] Call Trace: [ 29.854918] hardware_disable+0x34a/0x4b0 [ 29.859035] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 29.863497] kvm_arch_hardware_disable+0x35/0xd0 [ 29.868215] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 29.872674] hardware_disable_nolock+0x30/0x40 [ 29.877219] on_each_cpu+0xca/0x1b0 [ 29.880810] hardware_disable_all_nolock+0x3e/0x50 [ 29.885703] kvm_put_kvm+0x956/0xde0 [ 29.889384] ? kvm_clear_guest+0xb0/0xb0 [ 29.893412] ? kvm_irqfd_release+0xd1/0x120 [ 29.897699] ? lock_downgrade+0x980/0x980 [ 29.901818] ? _raw_spin_unlock_irq+0x27/0x70 [ 29.906281] ? kvm_irqfd_release+0xdd/0x120 [ 29.910566] ? kvm_irqfd_release+0xdd/0x120 [ 29.914851] ? kvm_put_kvm+0xde0/0xde0 [ 29.918701] kvm_vm_release+0x42/0x50 [ 29.922467] __fput+0x327/0x7e0 [ 29.925714] ? fput+0x140/0x140 [ 29.928960] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 29.934808] ? _raw_spin_unlock_irq+0x27/0x70 [ 29.939271] ____fput+0x15/0x20 [ 29.942517] task_work_run+0x199/0x270 [ 29.946368] ? task_work_cancel+0x210/0x210 [ 29.950655] ? _raw_spin_unlock+0x22/0x30 [ 29.954768] ? switch_task_namespaces+0x87/0xc0 [ 29.959409] do_exit+0x9bb/0x1ad0 [ 29.962829] ? kvm_vcpu_fault+0x520/0x520 [ 29.966945] ? mm_update_next_owner+0x930/0x930 [ 29.971577] ? find_held_lock+0x35/0x1d0 [ 29.975609] ? handle_mm_fault+0x2a0/0x930 [ 29.979810] ? find_held_lock+0x35/0x1d0 [ 29.983841] ? __do_page_fault+0x5f7/0xc90 [ 29.988041] ? lock_downgrade+0x980/0x980 [ 29.992156] ? down_read_trylock+0xdb/0x170 [ 29.996441] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 30.000985] ? vmacache_find+0x5f/0x280 [ 30.004932] ? up_read+0x1a/0x40 [ 30.008263] ? __do_page_fault+0x3d6/0xc90 [ 30.012462] ? __fd_install+0x288/0x740 [ 30.016403] ? kvm_vcpu_fault+0x520/0x520 [ 30.020514] ? do_vfs_ioctl+0x486/0x1520 [ 30.024540] ? ioctl_preallocate+0x2b0/0x2b0 [ 30.028916] ? selinux_capable+0x40/0x40 [ 30.032941] ? kmem_cache_alloc+0x466/0x760 [ 30.037224] ? __close_fd+0x222/0x360 [ 30.040991] do_group_exit+0x149/0x400 [ 30.044849] ? SyS_exit+0x30/0x30 [ 30.048265] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 30.053247] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 30.057970] SyS_exit_group+0x1d/0x20 [ 30.061733] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 30.066452] RIP: 0033:0x441d28 [ 30.069607] RSP: 002b:00007ffcf2e8dbc8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 30.077282] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000441d28 [ 30.084517] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 30.091752] RBP: 00000000006cd018 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 30.098988] R10: 0000000000404130 R11: 0000000000000246 R12: 0000000000404130 [ 30.106221] R13: 00000000004041c0 R14: 0000000000000000 R15: 0000000000000000 [ 30.113463] 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 [ 30.132528] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c818f5a0 [ 30.139260] ---[ end trace 52cbdcb5faa91870 ]--- [ 30.143977] Kernel panic - not syncing: Fatal exception [ 30.149678] Dumping ftrace buffer: [ 30.153183] (ftrace buffer empty) [ 30.156860] Kernel Offset: disabled [ 30.160454] Rebooting in 86400 seconds..