[....] Starting enhanced syslogd: rsyslogd[ 11.146375] audit: type=1400 audit(1513869435.066:5): avc: denied { syslog } for pid=2999 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: [ 17.275917] audit: type=1400 audit(1513869441.195:6): avc: denied { map } for pid=3139 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-6,10.128.0.8' (ECDSA) to the list of known hosts. [ 405.483237] audit: type=1400 audit(1513869829.403:7): avc: denied { map } for pid=3157 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 2017/12/21 15:23:49 parsed 1 programs 2017/12/21 15:23:49 executed programs: 0 [ 405.588635] audit: type=1400 audit(1513869829.508:8): avc: denied { map } for pid=3157 comm="syz-execprog" path="/root/syzkaller-shm339306333" 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 [ 405.620238] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 405.652464] kasan: CONFIG_KASAN_INLINE enabled [ 405.657074] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 405.664397] general protection fault: 0000 [#1] SMP KASAN [ 405.669896] Dumping ftrace buffer: [ 405.673398] (ftrace buffer empty) [ 405.677071] Modules linked in: [ 405.680229] CPU: 1 PID: 3168 Comm: syz-executor0 Not tainted 4.15.0-rc4-mm1+ #47 [ 405.687722] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 405.697128] RIP: 0010:native_write_cr4+0x4/0x10 [ 405.701758] RSP: 0018:ffff8801c87ef058 EFLAGS: 00010093 [ 405.707087] RAX: ffff8801c7f3c400 RBX: 00000000001606e0 RCX: ffffffff811a4932 [ 405.714320] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606e0 [ 405.721553] RBP: ffff8801c87ef058 R08: 1ffff100390fdd67 R09: 0000000000000004 [ 405.728784] R10: ffff8801c87eefc8 R11: 0000000000000004 R12: 0000000000000093 [ 405.736026] R13: ffff8801c7f3c400 R14: ffff8801db31a130 R15: ffff8801db31a130 [ 405.743260] FS: 00007f3782d2a700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 405.751448] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 405.757296] CR2: 0000000000000000 CR3: 0000000006422006 CR4: 00000000001626e0 [ 405.764536] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 405.771769] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 405.779002] Call Trace: [ 405.781706] hardware_disable+0x34a/0x4b0 [ 405.785836] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 405.790312] kvm_arch_hardware_disable+0x35/0xd0 [ 405.795031] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 405.799490] hardware_disable_nolock+0x30/0x40 [ 405.804153] on_each_cpu+0xca/0x1b0 [ 405.807750] hardware_disable_all_nolock+0x3e/0x50 [ 405.812644] kvm_put_kvm+0x956/0xde0 [ 405.816329] ? kvm_clear_guest+0xb0/0xb0 [ 405.820367] ? kvm_irqfd_release+0xd1/0x120 [ 405.825095] ? lock_downgrade+0x980/0x980 [ 405.829240] ? _raw_spin_unlock_irq+0x27/0x70 [ 405.833704] ? kvm_irqfd_release+0xdd/0x120 [ 405.837987] ? kvm_irqfd_release+0xdd/0x120 [ 405.842273] ? kvm_put_kvm+0xde0/0xde0 [ 405.846124] kvm_vm_release+0x42/0x50 [ 405.849916] __fput+0x327/0x7e0 [ 405.853164] ? fput+0x140/0x140 [ 405.856434] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 405.862284] ? _raw_spin_unlock_irq+0x27/0x70 [ 405.866745] ____fput+0x15/0x20 [ 405.869998] task_work_run+0x199/0x270 [ 405.873849] ? task_work_cancel+0x210/0x210 [ 405.878132] ? _raw_spin_unlock+0x22/0x30 [ 405.882243] ? switch_task_namespaces+0x87/0xc0 [ 405.886903] do_exit+0x9bb/0x1ad0 [ 405.890319] ? check_noncircular+0x20/0x20 [ 405.894519] ? mm_update_next_owner+0x930/0x930 [ 405.899154] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 405.904307] ? __might_sleep+0x95/0x190 [ 405.908247] ? find_held_lock+0x35/0x1d0 [ 405.912272] ? __pv_queued_spin_lock_slowpath+0x1480/0x1480 [ 405.917949] ? futex_wait+0x402/0x9a0 [ 405.921712] ? lock_downgrade+0x980/0x980 [ 405.925823] ? __unqueue_futex+0x1c0/0x290 [ 405.930028] ? fault_in_user_writeable+0x90/0x90 [ 405.934757] ? do_raw_spin_trylock+0x190/0x190 [ 405.939304] ? check_noncircular+0x20/0x20 [ 405.943512] ? drop_futex_key_refs.isra.12+0x63/0xa0 [ 405.948578] ? futex_wait+0x6a9/0x9a0 [ 405.952347] ? find_held_lock+0x35/0x1d0 [ 405.956374] ? get_signal+0x7ae/0x16c0 [ 405.960226] ? lock_downgrade+0x980/0x980 [ 405.964342] do_group_exit+0x149/0x400 [ 405.968194] ? do_raw_spin_trylock+0x190/0x190 [ 405.972739] ? SyS_exit+0x30/0x30 [ 405.976158] ? _raw_spin_unlock_irq+0x27/0x70 [ 405.980616] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 405.985599] get_signal+0x73f/0x16c0 [ 405.989287] ? ptrace_notify+0x130/0x130 [ 405.993313] ? kvm_vcpu_fault+0x520/0x520 [ 405.997426] ? exit_robust_list+0x240/0x240 [ 406.001717] ? find_held_lock+0x35/0x1d0 [ 406.005758] ? __fget+0x333/0x570 [ 406.009176] ? lock_downgrade+0x980/0x980 [ 406.013325] do_signal+0x94/0x1ee0 [ 406.016845] ? __lock_is_held+0xb6/0x140 [ 406.020874] ? setup_sigcontext+0x7d0/0x7d0 [ 406.025163] ? __fget+0x35c/0x570 [ 406.028581] ? iterate_fd+0x3f0/0x3f0 [ 406.032348] ? finish_task_switch+0x1d3/0x740 [ 406.036850] ? exit_to_usermode_loop+0x8c/0x2f0 [ 406.041485] exit_to_usermode_loop+0x258/0x2f0 [ 406.046031] ? ioctl_preallocate+0x2b0/0x2b0 [ 406.050404] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 406.055954] ? selinux_capable+0x40/0x40 [ 406.059985] syscall_return_slowpath+0x490/0x550 [ 406.064707] ? prepare_exit_to_usermode+0x340/0x340 [ 406.069689] ? entry_SYSCALL_64_fastpath+0x69/0x96 [ 406.074589] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 406.079569] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 406.084290] entry_SYSCALL_64_fastpath+0x94/0x96 [ 406.089007] RIP: 0033:0x452a09 [ 406.092168] RSP: 002b:00007f3782d29ce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 406.099839] RAX: fffffffffffffe00 RBX: 000000000071c038 RCX: 0000000000452a09 [ 406.107073] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000071c038 [ 406.114305] RBP: 000000000071c038 R08: 0000000000000000 R09: 000000000071c010 [ 406.121539] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 406.128770] R13: 00007ffca80f3b7f R14: 00007f3782d2a9c0 R15: 0000000000000006 [ 406.136009] 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 [ 406.155071] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c87ef058 [ 406.161190] ---[ end trace 7b80819d20132791 ]--- [ 406.165907] Kernel panic - not syncing: Fatal exception [ 406.171262] Dumping ftrace buffer: [ 406.174767] (ftrace buffer empty) [ 406.178443] Kernel Offset: disabled [ 406.182034] Rebooting in 86400 seconds..