[....] Starting enhanced syslogd: rsyslogd[ 11.030894] audit: type=1400 audit(1514226527.720:5): avc: denied { syslog } for pid=2996 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: [ 16.258820] audit: type=1400 audit(1514226532.948:6): avc: denied { map } for pid=3136 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-5,10.128.0.55' (ECDSA) to the list of known hosts. executing program [ 24.151415] audit: type=1400 audit(1514226540.841:7): avc: denied { map } for pid=3151 comm="syzkaller833707" path="/root/syzkaller833707318" 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 [ 24.183644] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 24.195416] kvm: vcpu 0: requested 68374 ns lapic timer period limited to 500000 ns [ 24.208193] kasan: CONFIG_KASAN_INLINE enabled [ 24.212787] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 24.220148] general protection fault: 0000 [#1] SMP KASAN [ 24.225654] Dumping ftrace buffer: [ 24.229159] (ftrace buffer empty) [ 24.232836] Modules linked in: [ 24.235997] CPU: 1 PID: 3151 Comm: syzkaller833707 Not tainted 4.15.0-rc4-mm1+ #49 [ 24.243673] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.253002] RIP: 0010:native_write_cr4+0x4/0x10 [ 24.257640] RSP: 0018:ffff8801ca6e75a0 EFLAGS: 00010093 [ 24.262971] RAX: ffff8801cbdbe200 RBX: 00000000001606e0 RCX: ffffffff811a4922 [ 24.270210] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606e0 [ 24.277462] RBP: ffff8801ca6e75a0 R08: 1ffff100394dce0f R09: 0000000000000004 [ 24.284700] R10: ffff8801ca6e7510 R11: 0000000000000004 R12: 0000000000000093 [ 24.291952] R13: ffff8801cbdbe200 R14: ffff8801db31a130 R15: ffff8801db31a130 [ 24.299196] FS: 0000000000ea4880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 24.307385] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.313233] CR2: 0000000000000000 CR3: 0000000006422005 CR4: 00000000001626e0 [ 24.320471] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.327714] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.334948] Call Trace: [ 24.337506] hardware_disable+0x34a/0x4b0 [ 24.341621] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 24.346083] kvm_arch_hardware_disable+0x35/0xd0 [ 24.350801] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 24.355262] hardware_disable_nolock+0x30/0x40 [ 24.359810] on_each_cpu+0xca/0x1b0 [ 24.363403] hardware_disable_all_nolock+0x3e/0x50 [ 24.368297] kvm_put_kvm+0x956/0xde0 [ 24.371978] ? kvm_clear_guest+0xb0/0xb0 [ 24.376007] ? kvm_irqfd_release+0xd1/0x120 [ 24.380293] ? lock_downgrade+0x980/0x980 [ 24.384411] ? _raw_spin_unlock_irq+0x27/0x70 [ 24.388875] ? kvm_irqfd_release+0xdd/0x120 [ 24.393161] ? kvm_irqfd_release+0xdd/0x120 [ 24.397457] ? kvm_put_kvm+0xde0/0xde0 [ 24.401308] kvm_vm_release+0x42/0x50 [ 24.405075] __fput+0x327/0x7e0 [ 24.408321] ? fput+0x140/0x140 [ 24.411568] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 24.417423] ? _raw_spin_unlock_irq+0x27/0x70 [ 24.421885] ____fput+0x15/0x20 [ 24.425132] task_work_run+0x199/0x270 [ 24.428985] ? task_work_cancel+0x210/0x210 [ 24.433271] ? _raw_spin_unlock+0x22/0x30 [ 24.437382] ? switch_task_namespaces+0x87/0xc0 [ 24.442026] do_exit+0x9bb/0x1ad0 [ 24.445447] ? kvm_vcpu_fault+0x520/0x520 [ 24.449561] ? mm_update_next_owner+0x930/0x930 [ 24.454195] ? find_held_lock+0x35/0x1d0 [ 24.458225] ? handle_mm_fault+0x2a0/0x930 [ 24.462434] ? find_held_lock+0x35/0x1d0 [ 24.466463] ? __do_page_fault+0x5f7/0xc90 [ 24.470661] ? lock_downgrade+0x980/0x980 [ 24.474777] ? down_read_trylock+0xdb/0x170 [ 24.479064] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 24.483609] ? vmacache_find+0x5f/0x280 [ 24.487558] ? up_read+0x1a/0x40 [ 24.490890] ? __do_page_fault+0x3d6/0xc90 [ 24.495088] ? task_work_run+0x1f4/0x270 [ 24.499118] ? kvm_vcpu_fault+0x520/0x520 [ 24.503230] ? do_vfs_ioctl+0x486/0x1520 [ 24.507259] ? ioctl_preallocate+0x2b0/0x2b0 [ 24.511650] ? selinux_capable+0x40/0x40 [ 24.515677] ? __close_fd+0x222/0x360 [ 24.519450] do_group_exit+0x149/0x400 [ 24.523302] ? SyS_exit+0x30/0x30 [ 24.526719] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.531717] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 24.536440] SyS_exit_group+0x1d/0x20 [ 24.540208] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 24.544928] RIP: 0033:0x441cb8 [ 24.548085] RSP: 002b:00007fff6f5f14d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 24.555756] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000441cb8 [ 24.562992] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 24.570230] RBP: 00000000006ce018 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 24.577465] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004040c0 [ 24.584710] R13: 0000000000404150 R14: 0000000000000000 R15: 0000000000000000 [ 24.591951] 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 [ 24.611023] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801ca6e75a0 [ 24.617141] ---[ end trace 173803e09886bb5d ]--- [ 24.621878] Kernel panic - not syncing: Fatal exception [ 24.627239] Dumping ftrace buffer: [ 24.630746] (ftrace buffer empty) [ 24.634429] Kernel Offset: disabled [ 24.638021] Rebooting in 86400 seconds..