[....] Starting enhanced syslogd: rsyslogd[ 12.890716] audit: type=1400 audit(1514880035.628:5): avc: denied { syslog } for pid=3348 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: [ 19.812989] audit: type=1400 audit(1514880042.550:6): avc: denied { map } for pid=3487 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 '10.128.15.226' (ECDSA) to the list of known hosts. executing program executing program [ 26.347458] audit: type=1400 audit(1514880049.085:7): avc: denied { map } for pid=3501 comm="syzkaller121717" path="/root/syzkaller121717062" 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 [ 26.383358] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu executing program executing program executing program executing program [ 26.608573] kasan: CONFIG_KASAN_INLINE enabled [ 26.613219] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 26.620556] general protection fault: 0000 [#1] SMP KASAN [ 26.626061] Dumping ftrace buffer: [ 26.629569] (ftrace buffer empty) [ 26.633245] Modules linked in: [ 26.636412] CPU: 0 PID: 3519 Comm: syzkaller121717 Not tainted 4.15.0-rc6+ #245 [ 26.643822] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.653158] RIP: 0010:native_write_cr4+0x4/0x10 [ 26.657796] RSP: 0018:ffff8801bc5ff068 EFLAGS: 00010093 [ 26.663128] RAX: ffff8801c2986400 RBX: 00000000001606f0 RCX: ffffffff811a3242 [ 26.670369] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 26.677610] RBP: ffff8801bc5ff068 R08: 1ffff100378bfd69 R09: 0000000000000004 [ 26.684849] R10: ffff8801bc5fefd8 R11: 0000000000000004 R12: 0000000000000093 [ 26.692098] R13: ffff8801c2986400 R14: ffff8801db21a130 R15: ffff8801db21a130 [ 26.699340] FS: 00007f5555b84700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 26.707535] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 26.713384] CR2: 00007f549a4e2000 CR3: 0000000006822002 CR4: 00000000001626f0 [ 26.720629] Call Trace: [ 26.723196] hardware_disable+0x34a/0x4b0 [ 26.727316] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 26.731786] kvm_arch_hardware_disable+0x35/0xd0 [ 26.736522] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 26.740996] hardware_disable_nolock+0x30/0x40 [ 26.745548] on_each_cpu+0xca/0x1b0 [ 26.749146] hardware_disable_all_nolock+0x3e/0x50 [ 26.754046] kvm_put_kvm+0x956/0xdf0 [ 26.757734] ? kvm_clear_guest+0xb0/0xb0 [ 26.761772] ? kvm_irqfd_release+0xd1/0x120 [ 26.766079] ? lock_downgrade+0x980/0x980 [ 26.770208] ? _raw_spin_unlock_irq+0x27/0x70 [ 26.774673] ? kvm_irqfd_release+0xdd/0x120 [ 26.778962] ? kvm_irqfd_release+0xdd/0x120 [ 26.783254] ? kvm_put_kvm+0xdf0/0xdf0 [ 26.787115] kvm_vm_release+0x42/0x50 [ 26.790914] __fput+0x327/0x7e0 [ 26.794179] ? fput+0x140/0x140 [ 26.797429] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 26.803283] ? _raw_spin_unlock_irq+0x27/0x70 [ 26.807766] ____fput+0x15/0x20 [ 26.811018] task_work_run+0x199/0x270 [ 26.814879] ? task_work_cancel+0x210/0x210 [ 26.819175] ? _raw_spin_unlock+0x22/0x30 [ 26.823295] ? switch_task_namespaces+0x87/0xc0 [ 26.827936] do_exit+0x9bb/0x1ad0 [ 26.831363] ? mm_update_next_owner+0x930/0x930 [ 26.836008] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 26.841168] ? __might_sleep+0x95/0x190 [ 26.845113] ? find_held_lock+0x35/0x1d0 [ 26.849146] ? futex_wait+0x402/0x9a0 [ 26.852914] ? lock_downgrade+0x980/0x980 [ 26.857032] ? __unqueue_futex+0x1c0/0x290 [ 26.861234] ? lock_release+0xa40/0xa40 [ 26.865178] ? fault_in_user_writeable+0x90/0x90 [ 26.869905] ? do_raw_spin_trylock+0x190/0x190 [ 26.874466] ? futex_wake+0x680/0x680 [ 26.878238] ? check_noncircular+0x20/0x20 [ 26.882444] ? drop_futex_key_refs.isra.12+0x63/0xb0 [ 26.887526] ? futex_wait+0x6a9/0x9a0 [ 26.891303] ? find_held_lock+0x35/0x1d0 [ 26.895340] ? get_signal+0x7ae/0x16c0 [ 26.899200] ? lock_downgrade+0x980/0x980 [ 26.903325] do_group_exit+0x149/0x400 [ 26.907188] ? do_raw_spin_trylock+0x190/0x190 [ 26.911739] ? SyS_exit+0x30/0x30 [ 26.915159] ? _raw_spin_unlock_irq+0x27/0x70 [ 26.919626] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.924614] get_signal+0x73f/0x16c0 [ 26.928298] ? ptrace_notify+0x130/0x130 [ 26.932330] ? exit_robust_list+0x240/0x240 [ 26.936636] ? find_held_lock+0x35/0x1d0 [ 26.940671] ? __fget+0x333/0x570 [ 26.944099] ? lock_downgrade+0x980/0x980 [ 26.948215] ? find_held_lock+0x35/0x1d0 [ 26.952249] do_signal+0x90/0x1eb0 [ 26.955756] ? __lock_is_held+0xb6/0x140 [ 26.959787] ? setup_sigcontext+0x7d0/0x7d0 [ 26.964078] ? __fget+0x35c/0x570 [ 26.967503] ? iterate_fd+0x3f0/0x3f0 [ 26.971281] ? exit_to_usermode_loop+0x8c/0x310 [ 26.975922] exit_to_usermode_loop+0x214/0x310 [ 26.980473] ? ioctl_preallocate+0x2b0/0x2b0 [ 26.984854] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 26.990360] ? selinux_capable+0x40/0x40 [ 26.994400] syscall_return_slowpath+0x490/0x550 [ 26.999124] ? prepare_exit_to_usermode+0x340/0x340 [ 27.004113] ? entry_SYSCALL_64_fastpath+0x6d/0x9a [ 27.009025] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 27.014010] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 27.018740] entry_SYSCALL_64_fastpath+0x98/0x9a [ 27.023465] RIP: 0033:0x448a89 [ 27.026622] RSP: 002b:00007f5555b83da8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 27.034300] RAX: fffffffffffffe00 RBX: 00000000006dec3c RCX: 0000000000448a89 [ 27.042153] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000006dec3c [ 27.049396] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 27.056633] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dec38 [ 27.063874] R13: 6d766b2f7665642f R14: 00007f5555b849c0 R15: 0000000000000007 [ 27.071122] 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 [ 27.090213] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801bc5ff068 [ 27.096340] ---[ end trace 918e0e2c05c4b882 ]--- [ 27.101064] Kernel panic - not syncing: Fatal exception [ 27.106800] Dumping ftrace buffer: [ 27.110310] (ftrace buffer empty) [ 27.113991] Kernel Offset: disabled [ 27.117584] Rebooting in 86400 seconds..