[....] Starting enhanced syslogd: rsyslogd[ 11.499114] audit: type=1400 audit(1514000881.729:5): avc: denied { syslog } for pid=3000 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: [ 17.564770] audit: type=1400 audit(1514000887.795:6): avc: denied { map } for pid=3140 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-kasan-gce-386-3,10.128.0.15' (ECDSA) to the list of known hosts. [ 23.811859] audit: type=1400 audit(1514000894.042:7): avc: denied { map } for pid=3154 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 2017/12/23 03:48:14 parsed 1 programs 2017/12/23 03:48:14 executed programs: 0 [ 23.923108] audit: type=1400 audit(1514000894.153:8): avc: denied { map } for pid=3154 comm="syz-execprog" path="/root/syzkaller-shm706384516" 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 [ 24.014005] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 24.748948] kasan: CONFIG_KASAN_INLINE enabled [ 24.753577] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 24.760907] general protection fault: 0000 [#1] SMP KASAN [ 24.766413] Dumping ftrace buffer: [ 24.769917] (ftrace buffer empty) [ 24.773597] Modules linked in: [ 24.776760] CPU: 0 PID: 3134 Comm: udevd Not tainted 4.15.0-rc4+ #144 [ 24.783301] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.792634] RIP: 0010:native_write_cr4+0x4/0x10 [ 24.797276] RSP: 0018:ffff8801db407ca8 EFLAGS: 00010006 [ 24.802607] RAX: ffff8801cbfd2480 RBX: 00000000001606f0 RCX: ffffffff811a2e02 [ 24.809854] RDX: 0000000000010000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 24.817091] RBP: ffff8801db407ca8 R08: 0000000000000000 R09: 0000000000000000 [ 24.824328] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000006 [ 24.831565] R13: ffff8801cbfd2480 R14: ffff8801db415850 R15: ffff8801db415850 [ 24.838802] FS: 00007f808845a7a0(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 24.846995] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.852846] CR2: 00007f8088461000 CR3: 00000001cb4fc006 CR4: 00000000001626f0 [ 24.860083] Call Trace: [ 24.862633] [ 24.864758] hardware_disable+0x34a/0x4b0 [ 24.868876] ? irq_work_sync+0x1a0/0x1a0 [ 24.872908] ? lock_downgrade+0x980/0x980 [ 24.877028] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 24.881494] kvm_arch_hardware_disable+0x35/0xd0 [ 24.886219] hardware_disable_nolock+0x30/0x40 [ 24.890779] flush_smp_call_function_queue+0x1f4/0x570 [ 24.896025] ? cpumask_weight+0x40/0x40 [ 24.899967] ? tick_program_event+0x83/0x100 [ 24.904347] ? rcu_pm_notify+0xc0/0xc0 [ 24.908210] generic_smp_call_function_single_interrupt+0x13/0x30 [ 24.914413] smp_call_function_single_interrupt+0x103/0x640 [ 24.920092] ? smp_call_function_interrupt+0x640/0x640 [ 24.925337] ? _raw_spin_lock+0x32/0x40 [ 24.929282] ? _raw_spin_unlock+0x22/0x30 [ 24.933399] ? handle_edge_irq+0x2b4/0x7c0 [ 24.937614] ? task_prio+0x40/0x40 [ 24.941130] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 24.945958] ? kernfs_put_open_node.isra.6+0x263/0x3d0 [ 24.951204] call_function_single_interrupt+0xa9/0xb0 [ 24.956376] [ 24.958605] RIP: 0010:kfree+0x103/0x260 [ 24.962543] RSP: 0018:ffff8801cb77fb08 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff04 [ 24.970218] RAX: 0000000000000007 RBX: ffff8801c3837f00 RCX: 0000000000000000 [ 24.977461] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000282 [ 24.984707] RBP: ffff8801cb77fb28 R08: 0000000000000000 R09: 0000000000000000 [ 24.991996] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000282 [ 24.999259] R13: ffff8801db0004c0 R14: ffffffff81d09943 R15: 0000000000000282 [ 25.006545] ? kernfs_put_open_node.isra.6+0x263/0x3d0 [ 25.011814] kernfs_put_open_node.isra.6+0x263/0x3d0 [ 25.016917] ? kernfs_release_file.isra.5+0x170/0x170 [ 25.022089] kernfs_fop_release+0x100/0x180 [ 25.026412] ? kernfs_put_open_node.isra.6+0x3d0/0x3d0 [ 25.031662] __fput+0x327/0x7e0 [ 25.034916] ? fput+0x140/0x140 [ 25.038172] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.042639] ____fput+0x15/0x20 [ 25.045888] task_work_run+0x199/0x270 [ 25.049746] ? task_work_cancel+0x210/0x210 [ 25.054038] ? exit_to_usermode_loop+0x8c/0x310 [ 25.058681] exit_to_usermode_loop+0x296/0x310 [ 25.063245] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 25.068753] ? __close_fd+0x222/0x360 [ 25.072527] syscall_return_slowpath+0x490/0x550 [ 25.077251] ? prepare_exit_to_usermode+0x340/0x340 [ 25.082234] ? SyS_read+0x184/0x220 [ 25.085831] ? entry_SYSCALL_64_fastpath+0x69/0x96 [ 25.090739] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.095722] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 25.100449] entry_SYSCALL_64_fastpath+0x94/0x96 [ 25.105169] RIP: 0033:0x7f8087b622b0 [ 25.108849] RSP: 002b:00007ffefd500f78 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 25.116527] RAX: 0000000000000000 RBX: 0000000000ac5140 RCX: 00007f8087b622b0 [ 25.123765] RDX: 0000000000ac5220 RSI: 0000000000000001 RDI: 0000000000000005 [ 25.131004] RBP: 0000000000000000 R08: 00007f808845a7a0 R09: 0000000000000000 [ 25.138243] R10: 0000000000ac5400 R11: 0000000000000246 R12: 00000000ffffffff [ 25.145483] R13: 0000000000ac5140 R14: 0000000000000006 R15: 0000000000000ae8 [ 25.152728] 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 [ 25.171822] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801db407ca8 [ 25.177951] ---[ end trace cf6bb73f1696ffc3 ]--- [ 25.182674] Kernel panic - not syncing: Fatal exception in interrupt [ 25.189167] Dumping ftrace buffer: [ 25.192678] (ftrace buffer empty) [ 25.196358] Kernel Offset: disabled [ 25.199948] Rebooting in 86400 seconds..