[....] Starting enhanced syslogd: rsyslogd[ 10.487969] audit: type=1400 audit(1514442649.139:5): avc: denied { syslog } for pid=2990 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: [ 16.173153] audit: type=1400 audit(1514442654.824:6): avc: denied { map } for pid=3129 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 '10.128.15.206' (ECDSA) to the list of known hosts. executing program executing program executing program executing program [ 24.117532] audit: type=1400 audit(1514442662.769:7): avc: denied { map } for pid=3144 comm="syzkaller641692" path="/root/syzkaller641692157" 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 [ 24.143590] audit: type=1400 audit(1514442662.769:8): avc: denied { map } for pid=3144 comm="syzkaller641692" path="/dev/usbmon0" dev="devtmpfs" ino=8848 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 [ 24.197159] page:00000000a25629bc count:0 mapcount:0 mapping: (null) index:0x0 [ 24.205404] flags: 0x2fffc0000000000() [ 24.209318] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 24.217232] raw: ffffea00072830e0 ffffea00072201a0 0000000000000000 0000000000000000 [ 24.225131] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 24.232215] ------------[ cut here ]------------ [ 24.236941] kernel BUG at ./include/linux/mm.h:844! [ 24.241976] invalid opcode: 0000 [#1] SMP KASAN [ 24.246614] Dumping ftrace buffer: [ 24.250121] (ftrace buffer empty) [ 24.253801] Modules linked in: [ 24.256963] CPU: 0 PID: 3145 Comm: syzkaller641692 Not tainted 4.15.0-rc5+ #239 [ 24.264373] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.273705] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 24.278686] RSP: 0018:ffff8801c8867510 EFLAGS: 00010203 [ 24.284015] RAX: 0000000000000000 RBX: 1ffff1003910cea4 RCX: 0000000000000000 [ 24.291251] RDX: 0000000000000000 RSI: 1ffff1003910cdee RDI: ffffed003910ce90 [ 24.298486] RBP: ffff8801c88675e8 R08: 1ffff1003910cdb0 R09: 0000000000000000 [ 24.305728] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff1003910cea8 [ 24.312964] R13: dffffc0000000000 R14: ffff8801c8867840 R15: ffffea00072208c0 [ 24.320200] FS: 00007efddddf7700(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 24.328392] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.334239] CR2: 00000000208be000 CR3: 00000001c880b005 CR4: 00000000001606f0 [ 24.341477] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.348721] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.355958] Call Trace: [ 24.358526] ? mon_alloc_buff+0x1a0/0x1a0 [ 24.362643] ? find_held_lock+0x35/0x1d0 [ 24.366677] __do_fault+0xeb/0x30f [ 24.370186] ? vma_gap_callbacks_rotate+0x62/0x80 [ 24.374995] ? pte_offset_kernel+0xc7/0xc7 [ 24.379197] ? print_irqtrace_events+0x270/0x270 [ 24.383919] ? rb_insert_color_cached+0x1660/0x1660 [ 24.388902] ? vma_compute_subtree_gap+0x200/0x200 [ 24.393808] ? check_noncircular+0x20/0x20 [ 24.398010] __handle_mm_fault+0x1d8f/0x3ce0 [ 24.402387] ? __pmd_alloc+0x4e0/0x4e0 [ 24.406247] ? __save_stack_trace+0x7e/0xd0 [ 24.410542] ? find_held_lock+0x35/0x1d0 [ 24.414575] ? handle_mm_fault+0x248/0x8d0 [ 24.418778] ? lock_downgrade+0x980/0x980 [ 24.423162] handle_mm_fault+0x334/0x8d0 [ 24.427192] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 24.431747] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 24.437617] ? find_vma+0x30/0x150 [ 24.441136] __get_user_pages+0x50c/0x15f0 [ 24.445346] ? follow_page_mask+0x17f0/0x17f0 [ 24.449816] ? lock_acquire+0x1d5/0x580 [ 24.453756] ? lock_acquire+0x1d5/0x580 [ 24.457696] ? __mm_populate+0x2c7/0x450 [ 24.461726] ? lock_release+0xa40/0xa40 [ 24.465667] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 24.471522] ? rcu_note_context_switch+0x710/0x710 [ 24.476419] populate_vma_page_range+0x20e/0x2f0 [ 24.481143] ? get_user_pages+0xc0/0xc0 [ 24.485086] ? vmacache_find+0x5f/0x280 [ 24.489028] ? vmacache_update+0xfe/0x130 [ 24.493146] ? find_vma+0x30/0x150 [ 24.496653] __mm_populate+0x23a/0x450 [ 24.500511] ? populate_vma_page_range+0x2f0/0x2f0 [ 24.505407] ? down_read_killable+0x180/0x180 [ 24.509870] ? security_mmap_file+0x143/0x180 [ 24.514336] vm_mmap_pgoff+0x241/0x280 [ 24.518192] ? vma_is_stack_for_current+0xa0/0xa0 [ 24.523002] ? putname+0xee/0x130 [ 24.526422] ? rcu_read_lock_sched_held+0x108/0x120 [ 24.531409] ? kmem_cache_free+0x267/0x2a0 [ 24.535617] SyS_mmap_pgoff+0x462/0x5f0 [ 24.539561] ? find_mergeable_anon_vma+0xd0/0xd0 [ 24.544285] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.549279] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 24.554004] SyS_mmap+0x16/0x20 [ 24.557249] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 24.561971] RIP: 0033:0x449269 [ 24.565128] RSP: 002b:00007efddddf6d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 24.572801] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449269 [ 24.580038] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 24.587274] RBP: 0000000000000000 R08: 000000000000000d R09: 0000000000000000 [ 24.594512] R10: 0000000000008011 R11: 0000000000000212 R12: 00000000006dac20 [ 24.601747] R13: 6273752f7665642f R14: 00007efddddf79c0 R15: 0000000000000005 [ 24.608989] 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 eb bd a4 fd 48 c7 c6 c0 c0 70 85 4c 89 ff e8 2c a3 cd fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 c7 bd a4 fd [ 24.628053] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c8867510 [ 24.634574] ---[ end trace b24d816c5e3b8922 ]--- [ 24.639310] Kernel panic - not syncing: Fatal exception [ 24.645151] Dumping ftrace buffer: [ 24.648660] (ftrace buffer empty) [ 24.652337] Kernel Offset: disabled [ 24.655931] Rebooting in 86400 seconds..