[....] Starting enhanced syslogd: rsyslogd[ 10.457042] audit: type=1400 audit(1515037298.185:5): avc: denied { syslog } for pid=3308 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: [ 13.285318] audit: type=1400 audit(1515037301.014:6): avc: denied { map } for pid=3446 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 '10.128.0.49' (ECDSA) to the list of known hosts. [ 45.568395] audit: type=1400 audit(1515037333.297:7): avc: denied { map } for pid=3465 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 2018/01/04 03:42:13 parsed 1 programs 2018/01/04 03:42:13 executed programs: 0 [ 45.692516] audit: type=1400 audit(1515037333.421:8): avc: denied { map } for pid=3465 comm="syz-execprog" path="/root/syzkaller-shm050985698" 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 [ 45.762711] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu 2018/01/04 03:42:18 executed programs: 129 2018/01/04 03:42:23 executed programs: 260 [ 59.556215] kasan: CONFIG_KASAN_INLINE enabled [ 59.560832] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 59.568163] general protection fault: 0000 [#1] SMP KASAN [ 59.573669] Dumping ftrace buffer: [ 59.577174] (ftrace buffer empty) [ 59.580849] Modules linked in: [ 59.584011] CPU: 1 PID: 4554 Comm: syz-executor0 Not tainted 4.15.0-rc6-next-20180103+ #87 [ 59.592378] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.601710] RIP: 0010:native_write_cr4+0x4/0x10 [ 59.606349] RSP: 0018:ffff8801d19ef860 EFLAGS: 00010093 [ 59.611675] RAX: ffff8801c5966300 RBX: 00000000001606e0 RCX: ffffffff8115d7c2 [ 59.618910] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606e0 [ 59.626145] RBP: ffff8801d19ef860 R08: ffffffff8105f787 R09: 0000000000000004 [ 59.633379] R10: ffff8801d19ef878 R11: 0000000000000001 R12: 0000000000000093 [ 59.640613] R13: ffff8801c5966300 R14: ffff8801db51a130 R15: ffff8801db51a130 [ 59.647849] FS: 00007fb94bcf3700(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 [ 59.656037] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 59.661882] CR2: 0000000000000000 CR3: 0000000005e22004 CR4: 00000000001626e0 [ 59.669125] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 59.676366] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 59.683599] Call Trace: [ 59.686155] hardware_disable+0x34a/0x4b0 [ 59.690269] ? smp_call_function_many+0x76/0x6e0 [ 59.694989] ? kvm_io_bus_get_dev+0x1b0/0x1b0 [ 59.699459] kvm_arch_hardware_disable+0x35/0xd0 [ 59.704184] ? kvm_io_bus_get_dev+0x1b0/0x1b0 [ 59.708641] hardware_disable_nolock+0x30/0x40 [ 59.713187] on_each_cpu+0xca/0x1b0 [ 59.716793] hardware_disable_all_nolock+0x3e/0x50 [ 59.721689] kvm_put_kvm+0x69c/0xa70 [ 59.725369] ? kvm_put_kvm+0xa70/0xa70 [ 59.729224] kvm_vm_release+0x42/0x50 [ 59.732987] __fput+0x291/0x6e0 [ 59.736238] ____fput+0x15/0x20 [ 59.739482] task_work_run+0x122/0x1a0 [ 59.743334] do_exit+0x7f4/0x2da0 [ 59.746756] ? mm_update_next_owner+0x690/0x690 [ 59.751396] ? find_held_lock+0x35/0x1e0 [ 59.755425] ? get_signal+0x644/0x1460 [ 59.759277] ? lock_downgrade+0x860/0x860 [ 59.763390] do_group_exit+0x108/0x320 [ 59.767244] get_signal+0x5e9/0x1460 [ 59.770926] do_signal+0x7f/0x1980 [ 59.774432] ? find_held_lock+0x35/0x1e0 [ 59.778455] ? setup_sigcontext+0x7d0/0x7d0 [ 59.782739] ? kvm_vcpu_fault+0x3d0/0x3d0 [ 59.786853] ? do_vfs_ioctl+0x439/0xfe0 [ 59.790792] ? selinux_file_ioctl+0x354/0x540 [ 59.795251] ? lock_downgrade+0x860/0x860 [ 59.799372] ? SyS_futex+0x1fd/0x2b0 [ 59.803055] ? exit_to_usermode_loop+0x3f/0x210 [ 59.807700] exit_to_usermode_loop+0x1aa/0x210 [ 59.812250] syscall_return_slowpath+0x383/0x430 [ 59.816971] entry_SYSCALL_64_fastpath+0x98/0x9a [ 59.821690] RIP: 0033:0x452ac9 [ 59.824845] RSP: 002b:00007fb94bcf2ce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 59.832515] RAX: fffffffffffffe00 RBX: 000000000071bf80 RCX: 0000000000452ac9 [ 59.839748] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000071bf80 [ 59.846984] RBP: 000000000071bf80 R08: 0000000000000000 R09: 000000000071bf58 [ 59.854224] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 59.861457] R13: 00007ffe76e0a3cf R14: 00007fb94bcf39c0 R15: 0000000000000002 [ 59.868696] 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 [ 59.887745] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801d19ef860 [ 59.893858] ---[ end trace b84f448fe9d3c77e ]--- [ 59.898574] Kernel panic - not syncing: Fatal exception [ 59.904360] Dumping ftrace buffer: [ 59.907883] (ftrace buffer empty) [ 59.911560] Kernel Offset: disabled [ 59.915151] Rebooting in 86400 seconds..