[ 12.417615] audit: type=1400 audit(1513536342.414:5): avc: denied { syslog } for pid=2994 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [....] Starting enhanced syslogd: rsyslogd[?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: [ 17.286815] audit: type=1400 audit(1513536347.283:6): avc: denied { map } for pid=3134 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-3,10.128.15.236' (ECDSA) to the list of known hosts. executing program [ 23.595842] audit: type=1400 audit(1513536353.592:7): avc: denied { map } for pid=3148 comm="syzkaller536936" path="/root/syzkaller536936348" 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 [ 23.630975] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 23.654829] kasan: CONFIG_KASAN_INLINE enabled [ 23.659460] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 23.666794] general protection fault: 0000 [#1] SMP KASAN [ 23.672299] Dumping ftrace buffer: [ 23.675801] (ftrace buffer empty) [ 23.679487] Modules linked in: [ 23.682649] CPU: 0 PID: 3148 Comm: syzkaller536936 Not tainted 4.15.0-rc2-mm1+ #39 [ 23.690317] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.699646] RIP: 0010:native_write_cr4+0x4/0x10 [ 23.704275] RSP: 0018:ffff8801c40975a0 EFLAGS: 00010093 [ 23.709604] RAX: ffff8801c40e4340 RBX: 00000000001606f0 RCX: ffffffff811a2d22 [ 23.716839] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 23.724074] RBP: ffff8801c40975a0 R08: ffff8801c4097150 R09: ffff8801c40e4340 [ 23.731309] R10: ffff8801c4097510 R11: ffffed0038812e2c R12: 0000000000000093 [ 23.738542] R13: ffff8801c40e4340 R14: ffff8801db21a130 R15: ffff8801db21a130 [ 23.745778] FS: 0000000001e2e880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 23.753967] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.759815] CR2: 0000000000000000 CR3: 0000000006225001 CR4: 00000000001626f0 [ 23.767061] Call Trace: [ 23.769617] hardware_disable+0x34a/0x4b0 [ 23.773734] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 23.778207] kvm_arch_hardware_disable+0x35/0xd0 [ 23.782928] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 23.787387] hardware_disable_nolock+0x30/0x40 [ 23.791934] on_each_cpu+0xca/0x1b0 [ 23.795538] hardware_disable_all_nolock+0x3e/0x50 [ 23.800437] kvm_put_kvm+0x956/0xde0 [ 23.804119] ? kvm_clear_guest+0xb0/0xb0 [ 23.808145] ? lock_downgrade+0x980/0x980 [ 23.812268] ? do_raw_spin_trylock+0x190/0x190 [ 23.816828] ? _raw_spin_unlock_irq+0x27/0x70 [ 23.821290] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.826277] ? kvm_irqfd_release+0xdd/0x120 [ 23.830561] ? kvm_irqfd_release+0xdd/0x120 [ 23.834848] ? kvm_put_kvm+0xde0/0xde0 [ 23.838703] kvm_vm_release+0x42/0x50 [ 23.842471] __fput+0x333/0x7f0 [ 23.845725] ? fput+0x140/0x140 [ 23.848979] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.854832] ? _raw_spin_unlock_irq+0x27/0x70 [ 23.859297] ____fput+0x15/0x20 [ 23.862545] task_work_run+0x199/0x270 [ 23.866397] ? task_work_cancel+0x210/0x210 [ 23.870692] ? _raw_spin_unlock+0x22/0x30 [ 23.874813] ? switch_task_namespaces+0x87/0xc0 [ 23.879452] do_exit+0x9bb/0x1ae0 [ 23.882881] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 23.888124] ? mm_update_next_owner+0x930/0x930 [ 23.892762] ? find_held_lock+0x39/0x1d0 [ 23.896800] ? lock_downgrade+0x980/0x980 [ 23.900922] ? user_return_notifier_unregister+0x23d/0x360 [ 23.906508] ? uprobe_post_sstep_notifier+0x120/0x120 [ 23.911662] ? __handle_mm_fault+0x3dd0/0x3dd0 [ 23.916208] ? vmacache_update+0xfe/0x130 [ 23.920325] ? kvm_on_user_return+0xe1/0x3c0 [ 23.924703] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.929683] ? trace_hardirqs_on+0xd/0x10 [ 23.933797] ? kvm_on_user_return+0x286/0x3c0 [ 23.938262] ? trace_hardirqs_off+0xd/0x10 [ 23.942462] ? exit_to_usermode_loop+0x198/0x2f0 [ 23.947198] ? ioctl_preallocate+0x2b0/0x2b0 [ 23.951572] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 23.957077] ? selinux_capable+0x40/0x40 [ 23.961105] ? __close_fd+0x222/0x360 [ 23.964873] do_group_exit+0x149/0x400 [ 23.968726] ? prepare_exit_to_usermode+0x340/0x340 [ 23.973709] ? SyS_exit+0x30/0x30 [ 23.977132] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.982112] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 23.986833] SyS_exit_group+0x1d/0x20 [ 23.990602] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 23.995328] RIP: 0033:0x441c58 [ 23.998488] RSP: 002b:00007ffd56f39388 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 24.006160] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000441c58 [ 24.013395] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 24.020629] RBP: 00000000006cd018 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 24.027863] R10: 0000000000000012 R11: 0000000000000246 R12: 0000000000404060 [ 24.035103] R13: 00000000004040f0 R14: 0000000000000000 R15: 0000000000000000 [ 24.042345] 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 [ 24.061404] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c40975a0 [ 24.067518] ---[ end trace 67d530eaaa97cfa7 ]--- [ 24.072234] Kernel panic - not syncing: Fatal exception [ 24.078050] Dumping ftrace buffer: [ 24.081561] (ftrace buffer empty) [ 24.085238] Kernel Offset: disabled [ 24.088831] Rebooting in 86400 seconds..