[....] Starting enhanced syslogd: rsyslogd[ 12.384138] audit: type=1400 audit(1514851900.382:5): avc: denied { syslog } for pid=3336 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: [ 18.300986] audit: type=1400 audit(1514851906.299:6): avc: denied { map } for pid=3477 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 '10.128.0.15' (ECDSA) to the list of known hosts. executing program [ 24.487386] audit: type=1400 audit(1514851912.486:7): avc: denied { map } for pid=3491 comm="syzkaller604839" path="/root/syzkaller604839061" 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 [ 24.519857] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 24.576312] kasan: CONFIG_KASAN_INLINE enabled [ 24.580937] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 24.588284] general protection fault: 0000 [#1] SMP KASAN [ 24.593800] Dumping ftrace buffer: [ 24.597308] (ftrace buffer empty) [ 24.600983] Modules linked in: [ 24.604145] CPU: 1 PID: 3502 Comm: syzkaller604839 Not tainted 4.15.0-rc6+ #245 [ 24.611554] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.620884] RIP: 0010:native_write_cr4+0x4/0x10 [ 24.625526] RSP: 0018:ffff8801c0207068 EFLAGS: 00010093 [ 24.630857] RAX: ffff8801bff9c0c0 RBX: 00000000001606e0 RCX: ffffffff811a3242 [ 24.638119] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606e0 [ 24.645357] RBP: ffff8801c0207068 R08: 1ffff10038040d69 R09: 0000000000000004 [ 24.652598] R10: ffff8801c0206fd8 R11: 0000000000000004 R12: 0000000000000093 [ 24.659836] R13: ffff8801bff9c0c0 R14: ffff8801db31a130 R15: ffff8801db31a130 [ 24.667075] FS: 00007f1c151aa700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 24.675267] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.681116] CR2: 0000000020307fe8 CR3: 0000000006822003 CR4: 00000000001626e0 [ 24.688356] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.695594] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.702830] Call Trace: [ 24.705386] hardware_disable+0x34a/0x4b0 [ 24.709507] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 24.713969] kvm_arch_hardware_disable+0x35/0xd0 [ 24.718691] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 24.723162] hardware_disable_nolock+0x30/0x40 [ 24.727710] on_each_cpu+0xca/0x1b0 [ 24.731304] hardware_disable_all_nolock+0x3e/0x50 [ 24.736199] kvm_put_kvm+0x956/0xdf0 [ 24.739882] ? kvm_clear_guest+0xb0/0xb0 [ 24.743912] ? kvm_irqfd_release+0xd1/0x120 [ 24.748200] ? lock_downgrade+0x980/0x980 [ 24.752324] ? _raw_spin_unlock_irq+0x27/0x70 [ 24.756790] ? kvm_irqfd_release+0xdd/0x120 [ 24.761078] ? kvm_irqfd_release+0xdd/0x120 [ 24.765367] ? kvm_put_kvm+0xdf0/0xdf0 [ 24.769230] kvm_vm_release+0x42/0x50 [ 24.773004] __fput+0x327/0x7e0 [ 24.776278] ? fput+0x140/0x140 [ 24.779526] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 24.785393] ? _raw_spin_unlock_irq+0x27/0x70 [ 24.789859] ____fput+0x15/0x20 [ 24.793108] task_work_run+0x199/0x270 [ 24.796993] ? task_work_cancel+0x210/0x210 [ 24.801291] ? _raw_spin_unlock+0x22/0x30 [ 24.805419] ? switch_task_namespaces+0x87/0xc0 [ 24.810083] do_exit+0x9bb/0x1ad0 [ 24.813508] ? mm_update_next_owner+0x930/0x930 [ 24.818150] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 24.823309] ? __might_sleep+0x95/0x190 [ 24.827256] ? find_held_lock+0x35/0x1d0 [ 24.831290] ? futex_wait+0x402/0x9a0 [ 24.835059] ? lock_downgrade+0x980/0x980 [ 24.839173] ? __unqueue_futex+0x1c0/0x290 [ 24.843373] ? lock_release+0xa40/0xa40 [ 24.847316] ? fault_in_user_writeable+0x90/0x90 [ 24.852044] ? do_raw_spin_trylock+0x190/0x190 [ 24.856592] ? futex_wake+0x680/0x680 [ 24.860360] ? check_noncircular+0x20/0x20 [ 24.864576] ? drop_futex_key_refs.isra.12+0x63/0xb0 [ 24.869647] ? futex_wait+0x6a9/0x9a0 [ 24.873420] ? find_held_lock+0x35/0x1d0 [ 24.877453] ? get_signal+0x7ae/0x16c0 [ 24.881308] ? lock_downgrade+0x980/0x980 [ 24.885426] do_group_exit+0x149/0x400 [ 24.889281] ? do_raw_spin_trylock+0x190/0x190 [ 24.893828] ? SyS_exit+0x30/0x30 [ 24.897248] ? _raw_spin_unlock_irq+0x27/0x70 [ 24.901710] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.906693] get_signal+0x73f/0x16c0 [ 24.910381] ? ptrace_notify+0x130/0x130 [ 24.914413] ? exit_robust_list+0x240/0x240 [ 24.918705] ? find_held_lock+0x35/0x1d0 [ 24.922753] ? __fget+0x333/0x570 [ 24.926174] ? lock_downgrade+0x980/0x980 [ 24.930297] ? find_held_lock+0x35/0x1d0 [ 24.934331] do_signal+0x90/0x1eb0 [ 24.937842] ? __lock_is_held+0xb6/0x140 [ 24.941872] ? setup_sigcontext+0x7d0/0x7d0 [ 24.946173] ? __fget+0x35c/0x570 [ 24.949594] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 24.954145] ? iterate_fd+0x3f0/0x3f0 [ 24.957913] ? up_read+0x1a/0x40 [ 24.961247] ? __do_page_fault+0x3d6/0xc90 [ 24.965452] ? exit_to_usermode_loop+0x8c/0x310 [ 24.970090] exit_to_usermode_loop+0x214/0x310 [ 24.974639] ? __fget_light+0x297/0x380 [ 24.978580] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 24.984088] syscall_return_slowpath+0x490/0x550 [ 24.988819] ? prepare_exit_to_usermode+0x340/0x340 [ 24.993803] ? entry_SYSCALL_64_fastpath+0x6d/0x9a [ 24.998703] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.003688] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 25.008415] entry_SYSCALL_64_fastpath+0x98/0x9a [ 25.013138] RIP: 0033:0x4462e9 [ 25.016294] RSP: 002b:00007f1c151a9da8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 25.023976] RAX: fffffffffffffe00 RBX: 00000000006dbc3c RCX: 00000000004462e9 [ 25.031213] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000006dbc3c [ 25.038449] RBP: 00000000006dbc38 R08: 0000000000000000 R09: 0000000000000000 [ 25.045687] R10: 0000000000000000 R11: 0000000000000246 R12: 6d766b2f7665642f [ 25.052924] R13: ffffffffffffffb8 R14: 6d64692e73666963 R15: 0000000000000014 [ 25.060168] 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 [ 25.079235] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c0207068 [ 25.085351] ---[ end trace 04adf1ed166fbea7 ]--- [ 25.090076] Kernel panic - not syncing: Fatal exception [ 25.095446] Dumping ftrace buffer: [ 25.098952] (ftrace buffer empty) [ 25.102631] Kernel Offset: disabled [ 25.106832] Rebooting in 86400 seconds..