[....] Starting enhanced syslogd: rsyslogd[ 11.682302] audit: type=1400 audit(1514781990.550:5): avc: denied { syslog } for pid=3333 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: [ 17.402699] audit: type=1400 audit(1514781996.270:6): avc: denied { map } for pid=3470 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 '10.128.0.34' (ECDSA) to the list of known hosts. executing program [ 27.302838] audit: type=1400 audit(1514782006.170:7): avc: denied { map } for pid=3486 comm="syzkaller619619" path="/root/syzkaller619619591" 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 [ 27.338925] audit: type=1400 audit(1514782006.206:8): avc: denied { map } for pid=3486 comm="syzkaller619619" path="/dev/usbmon0" dev="devtmpfs" ino=168 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 [ 27.393769] page:0000000013589361 count:0 mapcount:0 mapping: (null) index:0x0 [ 27.402144] flags: 0x2fffc0000000000() [ 27.406134] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 27.414038] raw: ffffea0006f18ce0 ffffea0006f27b20 0000000000000000 0000000000000000 [ 27.421917] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 27.429054] ------------[ cut here ]------------ [ 27.433784] kernel BUG at ./include/linux/mm.h:844! [ 27.438834] invalid opcode: 0000 [#1] SMP KASAN [ 27.443664] Dumping ftrace buffer: [ 27.447172] (ftrace buffer empty) [ 27.450849] Modules linked in: [ 27.454012] CPU: 1 PID: 3490 Comm: syzkaller619619 Not tainted 4.15.0-rc6+ #245 [ 27.461427] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.470766] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 27.475751] RSP: 0018:ffff8801bd2c7510 EFLAGS: 00010203 [ 27.481080] RAX: 0000000000000000 RBX: 1ffff10037a58ea4 RCX: 0000000000000000 [ 27.488323] RDX: 0000000000000000 RSI: 1ffff10037a58dee RDI: ffffed0037a58e90 [ 27.495560] RBP: ffff8801bd2c75e8 R08: 1ffff10037a58db0 R09: 0000000000000000 [ 27.502805] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10037a58ea8 [ 27.510043] R13: dffffc0000000000 R14: ffff8801bd2c7840 R15: ffffea0006f27600 [ 27.517280] FS: 00007fe18f075700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 27.525470] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.531318] CR2: 00007f84d55e3610 CR3: 00000001bcb6f003 CR4: 00000000001606e0 [ 27.538565] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.545800] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.553041] Call Trace: [ 27.555603] ? mon_alloc_buff+0x1a0/0x1a0 [ 27.559718] ? find_held_lock+0x35/0x1d0 [ 27.563755] __do_fault+0xeb/0x30f [ 27.567262] ? vma_gap_callbacks_rotate+0x62/0x80 [ 27.572076] ? pte_offset_kernel+0xc7/0xc7 [ 27.576276] ? print_irqtrace_events+0x270/0x270 [ 27.581001] ? rb_insert_color_cached+0x1660/0x1660 [ 27.585994] ? vma_compute_subtree_gap+0x200/0x200 [ 27.590892] ? check_noncircular+0x20/0x20 [ 27.595094] __handle_mm_fault+0x1d8f/0x3ce0 [ 27.599470] ? __pmd_alloc+0x4e0/0x4e0 [ 27.603326] ? __save_stack_trace+0x7e/0xd0 [ 27.607621] ? find_held_lock+0x35/0x1d0 [ 27.611650] ? handle_mm_fault+0x248/0x8d0 [ 27.615850] ? lock_downgrade+0x980/0x980 [ 27.619972] handle_mm_fault+0x334/0x8d0 [ 27.624004] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 27.628555] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 27.634404] ? find_vma+0x30/0x150 [ 27.637914] __get_user_pages+0x50c/0x15f0 [ 27.642126] ? follow_page_mask+0x17f0/0x17f0 [ 27.646590] ? lock_acquire+0x1d5/0x580 [ 27.650534] ? lock_acquire+0x1d5/0x580 [ 27.654487] ? __mm_populate+0x2c7/0x450 [ 27.658520] ? lock_release+0xa40/0xa40 [ 27.662460] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 27.668313] ? rcu_note_context_switch+0x710/0x710 [ 27.673214] populate_vma_page_range+0x20e/0x2f0 [ 27.677938] ? get_user_pages+0xc0/0xc0 [ 27.681880] ? vmacache_find+0x5f/0x280 [ 27.685820] ? vmacache_update+0xfe/0x130 [ 27.689935] ? find_vma+0x30/0x150 [ 27.693444] __mm_populate+0x23a/0x450 [ 27.697298] ? populate_vma_page_range+0x2f0/0x2f0 [ 27.702195] ? down_read_killable+0x180/0x180 [ 27.706655] ? security_mmap_file+0x143/0x180 [ 27.711123] vm_mmap_pgoff+0x241/0x280 [ 27.714980] ? vma_is_stack_for_current+0xa0/0xa0 [ 27.719786] ? __fdget_pos+0x130/0x190 [ 27.723639] ? __fdget_raw+0x20/0x20 [ 27.727323] SyS_mmap_pgoff+0x462/0x5f0 [ 27.731268] ? find_mergeable_anon_vma+0xd0/0xd0 [ 27.735990] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 27.740976] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 27.745704] SyS_mmap+0x16/0x20 [ 27.748962] entry_SYSCALL_64_fastpath+0x23/0x9a [ 27.753688] RIP: 0033:0x449319 [ 27.756843] RSP: 002b:00007fe18f074d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 27.764532] RAX: ffffffffffffffda RBX: 00000000006dac3c RCX: 0000000000449319 [ 27.771768] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 27.779009] RBP: 0000000000000000 R08: 0000000000000009 R09: 0000000000000000 [ 27.786336] R10: 0000000000008011 R11: 0000000000000212 R12: 00000000006dac38 [ 27.793573] R13: 6273752f7665642f R14: 00007fe18f0759c0 R15: 0000000000000007 [ 27.800815] 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 20 b1 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 [ 27.819890] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801bd2c7510 [ 27.826416] ---[ end trace 17524f91fa922570 ]--- [ 27.831353] Kernel panic - not syncing: Fatal exception [ 27.837105] Dumping ftrace buffer: [ 27.840614] (ftrace buffer empty) [ 27.844296] Kernel Offset: disabled [ 27.847895] Rebooting in 86400 seconds..