[....] Starting enhanced syslogd: rsyslogd[ 11.390867] audit: type=1400 audit(1513439987.347:5): avc: denied { syslog } for pid=2987 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: [ 17.114180] audit: type=1400 audit(1513439993.070:6): avc: denied { map } for pid=3128 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-kasan-gce-0,10.128.0.45' (ECDSA) to the list of known hosts. executing program [ 23.316627] audit: type=1400 audit(1513439999.273:7): avc: denied { map } for pid=3142 comm="syzkaller571131" path="/root/syzkaller571131461" 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 [ 23.349482] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 23.370430] kasan: CONFIG_KASAN_INLINE enabled [ 23.375052] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 23.382381] general protection fault: 0000 [#1] SMP KASAN [ 23.387885] Dumping ftrace buffer: [ 23.391386] (ftrace buffer empty) [ 23.395063] Modules linked in: [ 23.398226] CPU: 0 PID: 3142 Comm: syzkaller571131 Not tainted 4.15.0-rc3+ #224 [ 23.405635] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.414962] RIP: 0010:native_write_cr4+0x4/0x10 [ 23.419595] RSP: 0018:ffff8801c9fef5a0 EFLAGS: 00010093 [ 23.424921] RAX: ffff8801ca6f2100 RBX: 00000000001606f0 RCX: ffffffff811a2a92 [ 23.432155] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 23.439390] RBP: ffff8801c9fef5a0 R08: 1ffff100393fde0f R09: 0000000000000004 [ 23.446625] R10: ffff8801c9fef510 R11: 0000000000000004 R12: 0000000000000093 [ 23.453860] R13: ffff8801ca6f2100 R14: ffff8801db414850 R15: ffff8801db414850 [ 23.461098] FS: 0000000001107880(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 23.469288] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.475141] CR2: 0000000000000000 CR3: 0000000005e22004 CR4: 00000000001626f0 [ 23.482378] Call Trace: [ 23.484938] hardware_disable+0x34a/0x4b0 [ 23.489055] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 23.493516] kvm_arch_hardware_disable+0x35/0xd0 [ 23.498237] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 23.502696] hardware_disable_nolock+0x30/0x40 [ 23.507244] on_each_cpu+0xca/0x1b0 [ 23.510839] hardware_disable_all_nolock+0x3e/0x50 [ 23.515733] kvm_put_kvm+0x956/0xdf0 [ 23.519416] ? kvm_clear_guest+0xb0/0xb0 [ 23.523446] ? kvm_irqfd_release+0xd1/0x120 [ 23.527735] ? lock_downgrade+0x980/0x980 [ 23.531858] ? _raw_spin_unlock_irq+0x27/0x70 [ 23.536320] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.541301] ? kvm_irqfd_release+0xdd/0x120 [ 23.545587] ? kvm_irqfd_release+0xdd/0x120 [ 23.549875] ? kvm_put_kvm+0xdf0/0xdf0 [ 23.553725] kvm_vm_release+0x42/0x50 [ 23.557495] __fput+0x327/0x7e0 [ 23.560745] ? fput+0x140/0x140 [ 23.563990] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.569838] ? _raw_spin_unlock_irq+0x27/0x70 [ 23.574301] ____fput+0x15/0x20 [ 23.577548] task_work_run+0x199/0x270 [ 23.581401] ? task_work_cancel+0x210/0x210 [ 23.585687] ? _raw_spin_unlock+0x22/0x30 [ 23.589801] ? switch_task_namespaces+0x87/0xc0 [ 23.594439] do_exit+0x9bb/0x1ad0 [ 23.597858] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 23.603104] ? mm_update_next_owner+0x930/0x930 [ 23.607745] ? find_held_lock+0x35/0x1d0 [ 23.611779] ? handle_mm_fault+0x248/0x8d0 [ 23.615980] ? find_held_lock+0x35/0x1d0 [ 23.620017] ? __do_page_fault+0x5f7/0xc90 [ 23.624218] ? lock_downgrade+0x980/0x980 [ 23.628337] ? user_return_notifier_unregister+0x23d/0x360 [ 23.633926] ? uprobe_post_sstep_notifier+0x120/0x120 [ 23.639079] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 23.643639] ? vmacache_update+0xfe/0x130 [ 23.647757] ? kvm_on_user_return+0xe1/0x3c0 [ 23.652130] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.657111] ? trace_hardirqs_on+0xd/0x10 [ 23.661223] ? kvm_on_user_return+0x286/0x3c0 [ 23.665689] ? trace_hardirqs_off+0xd/0x10 [ 23.669897] ? exit_to_usermode_loop+0x198/0x310 [ 23.674621] ? ioctl_preallocate+0x2b0/0x2b0 [ 23.678997] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 23.684505] ? selinux_capable+0x40/0x40 [ 23.688533] ? __close_fd+0x222/0x360 [ 23.692304] do_group_exit+0x149/0x400 [ 23.696157] ? prepare_exit_to_usermode+0x340/0x340 [ 23.701138] ? SyS_exit+0x30/0x30 [ 23.704558] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.709547] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 23.714270] SyS_exit_group+0x1d/0x20 [ 23.718039] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 23.722761] RIP: 0033:0x441cd8 [ 23.725915] RSP: 002b:00007ffdda37bb88 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 23.733587] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000441cd8 [ 23.740822] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 23.748059] RBP: 00000000006cd018 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 23.755297] R10: 0000000000000012 R11: 0000000000000246 R12: 00000000004040e0 [ 23.762531] R13: 0000000000404170 R14: 0000000000000000 R15: 0000000000000000 [ 23.769776] 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 [ 23.788841] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c9fef5a0 [ 23.794957] ---[ end trace d8d79f07736cd1ae ]--- [ 23.799676] Kernel panic - not syncing: Fatal exception [ 23.805480] Dumping ftrace buffer: [ 23.808991] (ftrace buffer empty) [ 23.812666] Kernel Offset: disabled [ 23.816259] Rebooting in 86400 seconds..