[....] Starting enhanced syslogd: rsyslogd[ 11.954522] audit: type=1400 audit(1515558556.517:5): avc: denied { syslog } for pid=3341 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: [ 20.966647] audit: type=1400 audit(1515558565.529:6): avc: denied { map } for pid=3482 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 '10.128.15.196' (ECDSA) to the list of known hosts. executing program executing program executing program executing program [ 27.149283] audit: type=1400 audit(1515558571.711:7): avc: denied { map } for pid=3495 comm="syzkaller189614" path="/root/syzkaller189614355" 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 executing program executing program [ 27.175286] audit: type=1400 audit(1515558571.721:8): avc: denied { map } for pid=3495 comm="syzkaller189614" path="/dev/usbmon0" dev="devtmpfs" ino=1176 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:usbmon_device_t:s0 tclass=chr_file permissive=1 [ 27.237493] page:ffffea0007004300 count:0 mapcount:0 mapping: (null) index:0x0 [ 27.245782] flags: 0x2fffc0000000000() [ 27.249689] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 27.257578] raw: ffffea0007011260 ffffea0007004360 0000000000000000 0000000000000000 [ 27.265481] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 27.272572] ------------[ cut here ]------------ [ 27.277304] kernel BUG at ./include/linux/mm.h:844! [ 27.282329] invalid opcode: 0000 [#1] SMP KASAN [ 27.286976] Dumping ftrace buffer: [ 27.290480] (ftrace buffer empty) [ 27.294158] Modules linked in: [ 27.297320] CPU: 0 PID: 3496 Comm: syzkaller189614 Not tainted 4.15.0-rc7+ #255 [ 27.305371] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.314703] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 27.319695] RSP: 0018:ffff8801c0407510 EFLAGS: 00010203 [ 27.325028] RAX: 0000000000000000 RBX: 1ffff10038080ea4 RCX: 0000000000000000 [ 27.332266] RDX: 0000000000000000 RSI: 1ffff10038080dee RDI: ffffed0038080e90 [ 27.339504] RBP: ffff8801c04075e8 R08: 1ffff10038080db0 R09: 0000000000000000 [ 27.346741] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10038080ea8 [ 27.353979] R13: dffffc0000000000 R14: ffff8801c0407840 R15: ffffea0007004300 [ 27.361219] FS: 00007fc1addeb700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 27.369418] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.375270] CR2: 00000000208be000 CR3: 00000001c0633004 CR4: 00000000001606f0 [ 27.382510] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.389747] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.396982] Call Trace: [ 27.399543] ? mon_alloc_buff+0x1a0/0x1a0 [ 27.403660] ? find_held_lock+0x35/0x1d0 [ 27.407696] __do_fault+0xeb/0x30f [ 27.411208] ? vma_gap_callbacks_rotate+0x62/0x80 [ 27.416023] ? pte_offset_kernel+0xc7/0xc7 [ 27.420230] ? print_irqtrace_events+0x270/0x270 [ 27.424962] ? rb_insert_color_cached+0x1660/0x1660 [ 27.429947] ? vma_compute_subtree_gap+0x200/0x200 [ 27.434848] ? check_noncircular+0x20/0x20 [ 27.439058] __handle_mm_fault+0x1d8f/0x3ce0 [ 27.443443] ? __pmd_alloc+0x4e0/0x4e0 [ 27.447299] ? __save_stack_trace+0x7e/0xd0 [ 27.451591] ? find_held_lock+0x35/0x1d0 [ 27.455623] ? handle_mm_fault+0x248/0x8d0 [ 27.459830] ? lock_downgrade+0x980/0x980 [ 27.463958] handle_mm_fault+0x334/0x8d0 [ 27.467992] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 27.472545] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 27.478395] ? find_vma+0x30/0x150 [ 27.481920] __get_user_pages+0x50c/0x15f0 [ 27.486130] ? follow_page_mask+0x17f0/0x17f0 [ 27.490614] ? lock_acquire+0x1d5/0x580 [ 27.494555] ? lock_acquire+0x1d5/0x580 [ 27.498506] ? __mm_populate+0x2c7/0x450 [ 27.502540] ? lock_release+0xa40/0xa40 [ 27.506483] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 27.512339] ? rcu_note_context_switch+0x710/0x710 [ 27.517243] populate_vma_page_range+0x20e/0x2f0 [ 27.521967] ? get_user_pages+0xc0/0xc0 [ 27.525914] ? vmacache_find+0x5f/0x280 [ 27.529871] ? vmacache_update+0xfe/0x130 [ 27.533998] ? find_vma+0x30/0x150 [ 27.537510] __mm_populate+0x23a/0x450 [ 27.541367] ? populate_vma_page_range+0x2f0/0x2f0 [ 27.546269] ? down_read_killable+0x180/0x180 [ 27.550736] ? security_mmap_file+0x143/0x180 [ 27.555211] vm_mmap_pgoff+0x241/0x280 [ 27.559073] ? vma_is_stack_for_current+0xa0/0xa0 [ 27.563886] ? putname+0xee/0x130 [ 27.567311] ? rcu_read_lock_sched_held+0x108/0x120 [ 27.572296] ? kmem_cache_free+0x267/0x2a0 [ 27.576503] SyS_mmap_pgoff+0x462/0x5f0 [ 27.580458] ? find_mergeable_anon_vma+0xd0/0xd0 [ 27.585181] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 27.590170] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 27.594909] SyS_mmap+0x16/0x20 [ 27.598165] entry_SYSCALL_64_fastpath+0x23/0x9a [ 27.602904] RIP: 0033:0x449249 [ 27.606065] RSP: 002b:00007fc1addead98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 27.613738] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000449249 [ 27.620975] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 27.628211] RBP: cccccccccccccccd R08: 000000000000000d R09: 0000000000000000 [ 27.635447] R10: 0000000000008011 R11: 0000000000000212 R12: 0000000000000000 [ 27.642681] R13: 6273752f7665642f R14: 00007fc1addeb9c0 R15: 0000000000000005 [ 27.649929] Code: 00 44 89 e0 5b 41 5c 41 5d 41 5e 41 5f 5d c3 41 bc 02 00 00 00 eb bb e8 cb 9c 94 fd 48 c7 c6 a0 b1 12 86 4c 89 ff e8 dc 89 bd fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 a7 9c 94 fd [ 27.669014] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c0407510 [ 27.675518] ---[ end trace dbf100e4b9813f9a ]--- [ 27.680272] Kernel panic - not syncing: Fatal exception [ 27.685994] Dumping ftrace buffer: [ 27.689503] (ftrace buffer empty) [ 27.693180] Kernel Offset: disabled [ 27.696773] Rebooting in 86400 seconds..