[?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. [ 11.815476] audit: type=1400 audit(1514880111.154:6): avc: denied { map } for pid=3127 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 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.15.205' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 24.809637] audit: type=1400 audit(1514880124.148:7): avc: denied { map } for pid=3143 comm="syzkaller481428" path="/root/syzkaller481428372" 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 [ 24.841946] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu executing program [ 24.962575] kasan: CONFIG_KASAN_INLINE enabled [ 24.967201] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 24.974555] general protection fault: 0000 [#1] SMP KASAN [ 24.980064] Dumping ftrace buffer: [ 24.983572] (ftrace buffer empty) [ 24.987249] Modules linked in: [ 24.990415] CPU: 0 PID: 3123 Comm: udevd Not tainted 4.15.0-rc4-mm1+ #49 [ 24.997218] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.006549] RIP: 0010:native_write_cr4+0x4/0x10 [ 25.011193] RSP: 0018:ffff8801db207ca8 EFLAGS: 00010006 [ 25.016522] RAX: ffff8801cc106080 RBX: 00000000001606f0 RCX: ffffffff811a4922 [ 25.023762] RDX: 0000000000010000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 25.030999] RBP: ffff8801db207ca8 R08: 1ffff1003976fe18 R09: 0000000000000000 [ 25.038238] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000006 [ 25.045476] R13: ffff8801cc106080 R14: ffff8801db21a130 R15: ffff8801db21a130 [ 25.052727] FS: 00007f0c49a6e7a0(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 25.060930] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.066779] CR2: 00007f0c49a75000 CR3: 00000001cfbcc002 CR4: 00000000001626f0 [ 25.074019] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.081257] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.088494] Call Trace: [ 25.091045] [ 25.093172] hardware_disable+0x34a/0x4b0 [ 25.097285] ? irq_work_sync+0x1a0/0x1a0 [ 25.101323] ? lock_downgrade+0x980/0x980 [ 25.105442] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 25.109904] kvm_arch_hardware_disable+0x35/0xd0 [ 25.114637] hardware_disable_nolock+0x30/0x40 [ 25.119186] flush_smp_call_function_queue+0x1f4/0x570 [ 25.124438] ? cpumask_weight+0x40/0x40 [ 25.128380] ? rcu_idle_exit+0x410/0x410 [ 25.132498] ? __lock_is_held+0xb6/0x140 [ 25.136533] generic_smp_call_function_single_interrupt+0x13/0x30 [ 25.142732] smp_call_function_single_interrupt+0x103/0x640 [ 25.148419] ? smp_call_function_interrupt+0x640/0x640 [ 25.153671] ? _raw_spin_lock+0x32/0x40 [ 25.157613] ? _raw_spin_unlock+0x22/0x30 [ 25.161729] ? handle_edge_irq+0x2b4/0x7c0 [ 25.165944] ? task_prio+0x40/0x40 [ 25.169457] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.174270] call_function_single_interrupt+0xa9/0xb0 [ 25.179435] [ 25.181643] RIP: 0010:qlist_free_all+0xa9/0x160 [ 25.186275] RSP: 0018:ffff8801cbb7f250 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff04 [ 25.193958] RAX: 0000000000000007 RBX: 0000000000000286 RCX: 0000000000000006 [ 25.201194] RDX: 0000000000000000 RSI: ffff8801cc106948 RDI: 0000000000000286 [ 25.208438] RBP: ffff8801cbb7f288 R08: 1ffff1003976fe18 R09: 0000000000000000 [ 25.215677] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 25.222913] R13: ffff8801dae29600 R14: ffff8801c621ed40 R15: ffffffff864c8520 [ 25.230173] quarantine_reduce+0x141/0x170 [ 25.234389] kasan_kmalloc+0xca/0xe0 [ 25.238077] kasan_slab_alloc+0x12/0x20 [ 25.242016] kmem_cache_alloc+0x11b/0x760 [ 25.246135] ? __might_sleep+0x95/0x190 [ 25.250077] __anon_vma_prepare+0xbc/0x6b0 [ 25.254278] ? anon_vma_fork+0x870/0x870 [ 25.258310] ? print_irqtrace_events+0x270/0x270 [ 25.263034] ? check_noncircular+0x20/0x20 [ 25.267239] __handle_mm_fault+0x2c70/0x3ce0 [ 25.271615] ? __pmd_alloc+0x4e0/0x4e0 [ 25.275470] ? mark_held_locks+0xaf/0x100 [ 25.279586] ? find_held_lock+0x35/0x1d0 [ 25.283617] ? handle_mm_fault+0x2a0/0x930 [ 25.287817] ? lock_downgrade+0x980/0x980 [ 25.291943] handle_mm_fault+0x38f/0x930 [ 25.295972] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 25.300519] ? vmacache_find+0x5f/0x280 [ 25.304459] ? vmacache_update+0xfe/0x130 [ 25.308576] ? find_vma+0x30/0x150 [ 25.312084] __do_page_fault+0x5c9/0xc90 [ 25.316115] ? mm_fault_error+0x2c0/0x2c0 [ 25.320231] ? check_noncircular+0x20/0x20 [ 25.324434] do_page_fault+0xee/0x720 [ 25.328202] ? __do_page_fault+0xc90/0xc90 [ 25.332404] ? find_held_lock+0x35/0x1d0 [ 25.336438] ? __might_fault+0x110/0x1d0 [ 25.340481] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.345295] page_fault+0x2c/0x60 [ 25.348716] RIP: 0010:copy_user_generic_unrolled+0x89/0xc0 [ 25.354311] RSP: 0018:ffff8801cbb7fa60 EFLAGS: 00010207 [ 25.359640] RAX: ffffed0038c36ddc RBX: 000000000000001f RCX: 0000000000000003 [ 25.366874] RDX: 0000000000000007 RSI: ffff8801c61b6ec0 RDI: 00007f0c49a75000 [ 25.374109] RBP: ffff8801cbb7fa90 R08: 30313d524f4a414d R09: ffffed0038c36ddc [ 25.381345] R10: 0000000000000004 R11: ffffed0038c36ddb R12: 00007f0c49a75000 [ 25.388580] R13: ffff8801c61b6ec0 R14: 00007ffffffff000 R15: 00007f0c49a7501f [ 25.395828] ? _copy_to_user+0x9b/0xc0 [ 25.399685] seq_read+0xcb4/0x13d0 [ 25.403198] ? seq_lseek+0x3c0/0x3c0 [ 25.406885] ? vm_mmap_pgoff+0x1ed/0x280 [ 25.410913] ? lock_downgrade+0x980/0x980 [ 25.415029] kernfs_fop_read+0x455/0x610 [ 25.419067] ? kernfs_vma_page_mkwrite+0x220/0x220 [ 25.423967] ? kernfs_vma_page_mkwrite+0x220/0x220 [ 25.428863] __vfs_read+0xef/0xa00 [ 25.432373] ? fsnotify+0x7b3/0x1140 [ 25.436063] ? vfs_copy_file_range+0x940/0x940 [ 25.440615] ? fsnotify_first_mark+0x2b0/0x2b0 [ 25.445163] ? avc_policy_seqno+0x9/0x20 [ 25.449192] ? selinux_file_permission+0x82/0x460 [ 25.454002] ? security_file_permission+0x89/0x1e0 [ 25.458899] ? rw_verify_area+0xe5/0x2b0 [ 25.462935] ? __fdget_raw+0x20/0x20 [ 25.466616] vfs_read+0x11e/0x350 [ 25.470038] SyS_read+0xef/0x220 [ 25.473371] ? retint_kernel+0x10/0x10 [ 25.477234] ? kernel_write+0x120/0x120 [ 25.481180] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 25.485902] RIP: 0033:0x7f0c49176310 [ 25.489578] RSP: 002b:00007ffe0e0faf68 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 25.497252] RAX: ffffffffffffffda RBX: 00000000008acd80 RCX: 00007f0c49176310 [ 25.504493] RDX: 0000000000001000 RSI: 00007f0c49a75000 RDI: 0000000000000005 [ 25.511742] RBP: 00007f0c4942ce40 R08: 00000000ffffffff R09: 0000000000000000 [ 25.518977] R10: 0000000000000022 R11: 0000000000000246 R12: 0000000000001000 [ 25.526212] R13: 00000000008e9eb0 R14: 00000000008acd80 R15: 000000000000000b [ 25.533467] 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 [ 25.552555] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801db207ca8 [ 25.558675] ---[ end trace 7c4a0c2c9b2fd8ec ]--- [ 25.563394] Kernel panic - not syncing: Fatal exception in interrupt [ 25.569907] Dumping ftrace buffer: [ 25.573426] (ftrace buffer empty) [ 25.577110] Kernel Offset: disabled [ 25.580705] Rebooting in 86400 seconds..