[....] Starting enhanced syslogd: rsyslogd[ 12.219477] audit: type=1400 audit(1514770419.722:5): 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 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: [ 16.872181] audit: type=1400 audit(1514770424.374:6): avc: denied { map } for pid=3480 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 '10.128.0.25' (ECDSA) to the list of known hosts. executing program executing program executing program [ 33.434164] audit: type=1400 audit(1514770440.936:7): avc: denied { map } for pid=3497 comm="syzkaller454999" path="/root/syzkaller454999658" 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 [ 33.460237] audit: type=1400 audit(1514770440.937:8): avc: denied { map } for pid=3497 comm="syzkaller454999" path="/dev/usbmon0" dev="devtmpfs" ino=8883 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 [ 33.501595] page:00000000538db42a count:0 mapcount:0 mapping: (null) index:0x0 [ 33.509945] flags: 0x2fffc0000000000() [ 33.513867] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 33.521753] raw: ffffea000705ca20 ffffea00070456a0 0000000000000000 0000000000000000 [ 33.530087] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 33.537524] ------------[ cut here ]------------ [ 33.542262] kernel BUG at ./include/linux/mm.h:844! [ 33.547335] invalid opcode: 0000 [#1] SMP KASAN [ 33.551979] Dumping ftrace buffer: [ 33.555513] (ftrace buffer empty) [ 33.559191] Modules linked in: [ 33.562354] CPU: 0 PID: 3498 Comm: syzkaller454999 Not tainted 4.15.0-rc5+ #244 [ 33.569765] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.579132] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 33.584114] RSP: 0018:ffff8801c4a6f510 EFLAGS: 00010203 [ 33.589444] RAX: 0000000000000000 RBX: 1ffff1003894dea4 RCX: 0000000000000000 [ 33.596944] RDX: 0000000000000000 RSI: 1ffff1003894ddee RDI: ffffed003894de90 [ 33.604183] RBP: ffff8801c4a6f5e8 R08: 1ffff1003894ddb0 R09: 0000000000000000 [ 33.611419] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff1003894dea8 [ 33.618746] R13: dffffc0000000000 R14: ffff8801c4a6f840 R15: ffffea000705ddc0 [ 33.625998] FS: 00007f7b96bce700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 33.634191] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.640307] CR2: 00000000208be000 CR3: 00000001c0b36004 CR4: 00000000001606f0 [ 33.647818] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.655058] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.662297] Call Trace: [ 33.664859] ? mon_alloc_buff+0x1a0/0x1a0 [ 33.668983] ? finish_fault+0x1b4/0x2a0 [ 33.673199] ? lock_downgrade+0x980/0x980 [ 33.677675] ? do_swap_page+0x2c50/0x2c50 [ 33.681792] __do_fault+0xeb/0x30f [ 33.685300] ? pte_offset_kernel+0xc7/0xc7 [ 33.689505] ? check_noncircular+0x20/0x20 [ 33.693705] ? _raw_spin_unlock+0x22/0x30 [ 33.697822] __handle_mm_fault+0x1d8f/0x3ce0 [ 33.702203] ? __pmd_alloc+0x4e0/0x4e0 [ 33.706757] ? __save_stack_trace+0x7e/0xd0 [ 33.711744] ? find_held_lock+0x35/0x1d0 [ 33.715776] ? handle_mm_fault+0x248/0x8d0 [ 33.719977] ? lock_downgrade+0x980/0x980 [ 33.724101] handle_mm_fault+0x334/0x8d0 [ 33.728390] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 33.734186] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 33.740037] ? find_vma+0x30/0x150 [ 33.743559] __get_user_pages+0x50c/0x15f0 [ 33.747765] ? follow_page_mask+0x17f0/0x17f0 [ 33.752240] ? lock_acquire+0x1d5/0x580 [ 33.756179] ? lock_acquire+0x1d5/0x580 [ 33.760117] ? __mm_populate+0x2c7/0x450 [ 33.764147] ? lock_release+0xa40/0xa40 [ 33.768086] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 33.773940] ? rcu_note_context_switch+0x710/0x710 [ 33.778840] populate_vma_page_range+0x20e/0x2f0 [ 33.783566] ? get_user_pages+0xc0/0xc0 [ 33.787509] ? vmacache_find+0x5f/0x280 [ 33.791678] ? vmacache_update+0xfe/0x130 [ 33.795795] ? find_vma+0x30/0x150 [ 33.799893] __mm_populate+0x23a/0x450 [ 33.803748] ? populate_vma_page_range+0x2f0/0x2f0 [ 33.808642] ? down_read_killable+0x180/0x180 [ 33.813118] ? security_mmap_file+0x143/0x180 [ 33.817595] vm_mmap_pgoff+0x241/0x280 [ 33.821454] ? vma_is_stack_for_current+0xa0/0xa0 [ 33.826272] SyS_mmap_pgoff+0x462/0x5f0 [ 33.830224] ? find_mergeable_anon_vma+0xd0/0xd0 [ 33.834947] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 33.839930] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 33.844654] SyS_mmap+0x16/0x20 [ 33.847898] entry_SYSCALL_64_fastpath+0x23/0x9a [ 33.852619] RIP: 0033:0x449309 [ 33.855778] RSP: 002b:00007f7b96bcdd98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 33.863453] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449309 [ 33.870692] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 33.877929] RBP: 0000000000000000 R08: 0000000000000009 R09: 0000000000000000 [ 33.885167] R10: 0000000000008011 R11: 0000000000000212 R12: 00000000006dac20 [ 33.892404] R13: 6273752f7665642f R14: 00007f7b96bce9c0 R15: 0000000000000009 [ 33.899649] 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 2b b0 94 fd 48 c7 c6 e0 af 12 86 4c 89 ff e8 bc 98 bd fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 07 b0 94 fd [ 33.918728] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c4a6f510 [ 33.925413] ---[ end trace fad9f97fddfa0af8 ]--- [ 33.930257] Kernel panic - not syncing: Fatal exception [ 33.936398] Dumping ftrace buffer: [ 33.941135] (ftrace buffer empty) [ 33.944812] Kernel Offset: disabled [ 33.948409] Rebooting in 86400 seconds..