[....] Starting enhanced syslogd: rsyslogd[ 12.793132] audit: type=1400 audit(1515107283.165:5): avc: denied { syslog } for pid=3343 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: [ 18.382361] audit: type=1400 audit(1515107288.755:6): avc: denied { map } for pid=3483 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 '10.128.15.246' (ECDSA) to the list of known hosts. executing program [ 24.584992] audit: type=1400 audit(1515107294.957:7): avc: denied { map } for pid=3497 comm="syzkaller976664" path="/root/syzkaller976664771" 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 [ 24.623174] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 24.655785] kasan: CONFIG_KASAN_INLINE enabled [ 24.660406] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 24.667741] general protection fault: 0000 [#1] SMP KASAN [ 24.673263] Dumping ftrace buffer: [ 24.676771] (ftrace buffer empty) [ 24.680455] Modules linked in: [ 24.683623] CPU: 1 PID: 3477 Comm: udevd Not tainted 4.15.0-rc6+ #158 [ 24.690175] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.699517] RIP: 0010:native_write_cr4+0x4/0x10 [ 24.704153] RSP: 0018:ffff8801db307ca8 EFLAGS: 00010006 [ 24.709492] RAX: ffff8801c22163c0 RBX: 00000000001606e0 RCX: ffffffff811a3242 [ 24.716767] RDX: 0000000000010000 RSI: 0000000000000000 RDI: 00000000001606e0 [ 24.724018] RBP: ffff8801db307ca8 R08: 0000000000000000 R09: 1ffff100383a9f06 [ 24.731260] R10: ffff8801c1d4f7f8 R11: 0000000000000000 R12: 0000000000000006 [ 24.738506] R13: ffff8801c22163c0 R14: ffff8801db31d130 R15: ffff8801db31d130 [ 24.745749] FS: 00007fc190f9b7a0(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 24.753945] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.759798] CR2: 00007fc190fa2000 CR3: 00000001c2359006 CR4: 00000000001626e0 [ 24.767049] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.774293] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.781538] Call Trace: [ 24.784090] [ 24.786231] hardware_disable+0x34a/0x4b0 [ 24.790355] ? irq_work_sync+0x1a0/0x1a0 [ 24.794385] ? lock_downgrade+0x980/0x980 [ 24.798509] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 24.802988] kvm_arch_hardware_disable+0x35/0xd0 [ 24.807713] hardware_disable_nolock+0x30/0x40 [ 24.812267] flush_smp_call_function_queue+0x1f4/0x570 [ 24.817515] ? cpumask_weight+0x40/0x40 [ 24.821470] ? tick_program_event+0x83/0x100 [ 24.825853] ? rcu_pm_notify+0xc0/0xc0 [ 24.829716] generic_smp_call_function_single_interrupt+0x13/0x30 [ 24.835926] smp_call_function_single_interrupt+0x103/0x640 [ 24.841610] ? smp_call_function_interrupt+0x640/0x640 [ 24.846856] ? _raw_spin_lock+0x32/0x40 [ 24.850802] ? _raw_spin_unlock+0x22/0x30 [ 24.854919] ? handle_edge_irq+0x2b4/0x7c0 [ 24.859123] ? task_prio+0x40/0x40 [ 24.862646] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 24.867470] call_function_single_interrupt+0xa9/0xb0 [ 24.872628] [ 24.874835] RIP: 0010:mntput+0x66/0x90 [ 24.878694] RSP: 0018:ffff8801c1d4fa20 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff04 [ 24.886372] RAX: ffff8801c22163c0 RBX: ffff8801d6058420 RCX: ffffffff81b88c16 [ 24.893615] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000282 [ 24.900865] RBP: ffff8801c1d4fa30 R08: 0000000000000000 R09: 1ffff100383a9f06 [ 24.908107] R10: ffff8801c1d4f7f8 R11: 0000000000000000 R12: ffff8801d6058400 [ 24.915346] R13: ffffed00383a9f8f R14: 0000000000000000 R15: 0000000000000000 [ 24.922612] ? mntput+0x66/0x90 [ 24.925868] terminate_walk+0x29e/0x550 [ 24.929820] path_openat+0xa6a/0x3530 [ 24.933611] ? path_lookupat+0xba0/0xba0 [ 24.937643] ? lock_downgrade+0x980/0x980 [ 24.941760] ? do_sys_open+0x2e7/0x6d0 [ 24.945640] ? lock_release+0xa40/0xa40 [ 24.949589] ? do_raw_spin_trylock+0x190/0x190 [ 24.954143] ? __lock_is_held+0xb6/0x140 [ 24.958174] ? _find_next_bit+0xee/0x120 [ 24.962210] ? _raw_spin_unlock+0x22/0x30 [ 24.966335] ? __alloc_fd+0x29b/0x750 [ 24.970114] do_filp_open+0x25b/0x3b0 [ 24.973888] ? may_open_dev+0xe0/0xe0 [ 24.977664] ? mpi_resize+0x200/0x200 [ 24.981437] ? get_unused_fd_flags+0x121/0x190 [ 24.985993] ? getname_flags+0x256/0x580 [ 24.990030] do_sys_open+0x502/0x6d0 [ 24.993711] ? do_sys_open+0x502/0x6d0 [ 24.997572] ? filp_open+0x70/0x70 [ 25.001081] ? entry_SYSCALL_64_fastpath+0x5/0x9a [ 25.005902] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.010891] SyS_open+0x2d/0x40 [ 25.014151] entry_SYSCALL_64_fastpath+0x23/0x9a [ 25.018887] RIP: 0033:0x7fc1906a3120 [ 25.022567] RSP: 002b:00007ffc334619c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 25.030241] RAX: ffffffffffffffda RBX: 00000000025f1e80 RCX: 00007fc1906a3120 [ 25.037488] RDX: 00000000000001b6 RSI: 0000000000080000 RDI: 00007ffc33461aa0 [ 25.044728] RBP: 0000000002461030 R08: 0000000000000008 R09: 0000000000000001 [ 25.051969] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 25.059207] R13: 00000000025f1bf0 R14: 000000000246ba10 R15: 0000000000000001 [ 25.066460] 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 [ 25.085564] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801db307ca8 [ 25.091682] ---[ end trace 25618ec72a936890 ]--- [ 25.096409] Kernel panic - not syncing: Fatal exception in interrupt [ 25.103323] Dumping ftrace buffer: [ 25.106831] (ftrace buffer empty) [ 25.110508] Kernel Offset: disabled [ 25.114102] Rebooting in 86400 seconds..