[....] Starting enhanced syslogd: rsyslogd[ 11.065100] audit: type=1400 audit(1515321250.638:5): avc: denied { syslog } for pid=3311 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: [ 13.078714] audit: type=1400 audit(1515321252.652:6): avc: denied { map } for pid=3449 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 '10.128.0.25' (ECDSA) to the list of known hosts. executing program executing program [ 38.566381] audit: type=1400 audit(1515321278.140:7): avc: denied { map } for pid=3468 comm="syzkaller197208" path="/root/syzkaller197208791" 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 [ 38.609314] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 38.665670] kasan: CONFIG_KASAN_INLINE enabled [ 38.670267] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 38.677600] general protection fault: 0000 [#1] SMP KASAN [ 38.683104] Dumping ftrace buffer: [ 38.686608] (ftrace buffer empty) [ 38.690284] Modules linked in: [ 38.693454] CPU: 1 PID: 3479 Comm: syzkaller197208 Not tainted 4.15.0-rc6-mm1+ #51 [ 38.701126] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.710451] RIP: 0010:native_write_cr4+0x4/0x10 [ 38.715085] RSP: 0018:ffff8801bf96f860 EFLAGS: 00010093 [ 38.720416] RAX: ffff8801bf9ba500 RBX: 00000000001606e0 RCX: ffffffff8115d7c2 [ 38.727653] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606e0 [ 38.734888] RBP: ffff8801bf96f860 R08: ffffffff8105f787 R09: 0000000000000004 [ 38.742122] R10: ffff8801bf96f878 R11: 0000000000000001 R12: 0000000000000093 [ 38.749356] R13: ffff8801bf9ba500 R14: ffff8801db51d130 R15: ffff8801db51d130 [ 38.756594] FS: 00007fc0275c4700(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 [ 38.764785] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.770631] CR2: 0000000000000000 CR3: 0000000005e22003 CR4: 00000000001626e0 [ 38.777869] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.785110] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.792345] Call Trace: [ 38.794899] hardware_disable+0x34a/0x4b0 [ 38.799013] ? smp_call_function_many+0x76/0x6e0 [ 38.803737] ? kvm_io_bus_get_dev+0x1b0/0x1b0 [ 38.808197] kvm_arch_hardware_disable+0x35/0xd0 [ 38.812916] ? kvm_io_bus_get_dev+0x1b0/0x1b0 [ 38.817377] hardware_disable_nolock+0x30/0x40 [ 38.821924] on_each_cpu+0xca/0x1b0 [ 38.825516] hardware_disable_all_nolock+0x3e/0x50 [ 38.830409] kvm_put_kvm+0x69c/0xa70 [ 38.834089] ? kvm_put_kvm+0xa70/0xa70 [ 38.837940] kvm_vm_release+0x42/0x50 [ 38.841709] __fput+0x291/0x6e0 [ 38.844960] ____fput+0x15/0x20 [ 38.848209] task_work_run+0x122/0x1a0 [ 38.852066] do_exit+0x7f4/0x2da0 [ 38.855487] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 38.860644] ? debug_check_no_obj_freed+0x153/0xac3 [ 38.865624] ? check_noncircular+0x20/0x20 [ 38.869823] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 38.874891] ? mm_update_next_owner+0x690/0x690 [ 38.879526] ? find_held_lock+0x35/0x1e0 [ 38.883555] ? get_signal+0x644/0x1460 [ 38.887404] ? lock_downgrade+0x860/0x860 [ 38.891515] do_group_exit+0x108/0x320 [ 38.895367] get_signal+0x5e9/0x1460 [ 38.899052] do_signal+0x7f/0x1980 [ 38.902578] ? __free_pages+0x4f/0x80 [ 38.906344] ? put_task_stack+0x116/0x270 [ 38.910458] ? setup_sigcontext+0x7d0/0x7d0 [ 38.914743] ? finish_task_switch+0x42f/0x5c0 [ 38.919205] ? __schedule+0x858/0x1e10 [ 38.923580] ? __sched_text_start+0x8/0x8 [ 38.927698] ? __fget+0x22b/0x390 [ 38.931116] ? exit_to_usermode_loop+0x3f/0x210 [ 38.935752] exit_to_usermode_loop+0x1aa/0x210 [ 38.940301] syscall_return_slowpath+0x383/0x430 [ 38.945020] entry_SYSCALL_64_fastpath+0x98/0x9a [ 38.949739] RIP: 0033:0x445fc9 [ 38.952892] RSP: 002b:00007fc0275c3da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 38.960565] RAX: fffffffffffffffc RBX: 00000000006dbc54 RCX: 0000000000445fc9 [ 38.967798] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 38.975032] RBP: 0000000000000000 R08: 00007fc0275c4700 R09: 0000000000000000 [ 38.982272] R10: 00007fc0275c4700 R11: 0000000000000246 R12: 00000000006dbc50 [ 38.989506] R13: 000000002057b000 R14: 6d766b2f7665642f R15: 000000000000000b [ 38.996747] 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 [ 39.015794] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801bf96f860 [ 39.021905] ---[ end trace 7a36e243263c41b2 ]--- [ 39.026621] Kernel panic - not syncing: Fatal exception [ 39.031976] Dumping ftrace buffer: [ 39.035479] (ftrace buffer empty) [ 39.039153] Kernel Offset: disabled [ 39.042742] Rebooting in 86400 seconds..