[....] Starting enhanced syslogd: rsyslogd[ 11.608045] audit: type=1400 audit(1514973877.213:5): avc: denied { syslog } for pid=3340 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: [ 17.311493] audit: type=1400 audit(1514973882.917:6): avc: denied { map } for pid=3478 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. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 executing program [ 23.588759] audit: type=1400 audit(1514973889.194:7): avc: denied { map } for pid=3492 comm="syzkaller324076" path="/root/syzkaller324076080" 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 executing program executing program executing program executing program executing program [ 23.667748] audit: type=1400 audit(1514973889.273:8): avc: denied { map } for pid=3492 comm="syzkaller324076" path="/dev/usbmon0" dev="devtmpfs" ino=8888 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 [ 23.705145] page:000000003d347dfe count:0 mapcount:0 mapping: (null) index:0x0 [ 23.713508] flags: 0x2fffc0000000000() [ 23.717440] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 23.725337] raw: ffffea0007060a60 ffffea0006ffc860 0000000000000000 0000000000000000 [ 23.733235] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 23.740356] ------------[ cut here ]------------ [ 23.745084] kernel BUG at ./include/linux/mm.h:844! [ 23.750119] invalid opcode: 0000 [#1] SMP KASAN [ 23.754771] Dumping ftrace buffer: [ 23.758281] (ftrace buffer empty) [ 23.761962] Modules linked in: [ 23.765132] CPU: 0 PID: 3514 Comm: syzkaller324076 Not tainted 4.15.0-rc6+ #245 [ 23.772544] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.781884] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 23.786865] RSP: 0018:ffff8801c0017510 EFLAGS: 00010203 [ 23.792204] RAX: 0000000000000000 RBX: 1ffff10038002ea4 RCX: 0000000000000000 [ 23.799441] RDX: 0000000000000000 RSI: 1ffff10038002dee RDI: ffffed0038002e90 [ 23.806687] RBP: ffff8801c00175e8 R08: 1ffff10038002db0 R09: 0000000000000000 [ 23.813927] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10038002ea8 [ 23.821164] R13: dffffc0000000000 R14: ffff8801c0017840 R15: ffffea0006ffa780 [ 23.828470] FS: 00007f7606cb6700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 23.836665] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.842527] CR2: 00000000208be000 CR3: 00000001c0af5001 CR4: 00000000001606f0 [ 23.849770] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.857022] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.864263] Call Trace: [ 23.866827] ? mon_alloc_buff+0x1a0/0x1a0 [ 23.870945] ? finish_fault+0x1b4/0x2a0 [ 23.874887] ? lock_downgrade+0x980/0x980 [ 23.879011] ? do_swap_page+0x2c50/0x2c50 [ 23.883127] __do_fault+0xeb/0x30f [ 23.886635] ? pte_offset_kernel+0xc7/0xc7 [ 23.890844] ? check_noncircular+0x20/0x20 [ 23.895046] ? _raw_spin_unlock+0x22/0x30 [ 23.899169] __handle_mm_fault+0x1d8f/0x3ce0 [ 23.903554] ? __pmd_alloc+0x4e0/0x4e0 [ 23.907411] ? __save_stack_trace+0x7e/0xd0 [ 23.911712] ? find_held_lock+0x35/0x1d0 [ 23.915744] ? handle_mm_fault+0x248/0x8d0 [ 23.919945] ? lock_downgrade+0x980/0x980 [ 23.924070] handle_mm_fault+0x334/0x8d0 [ 23.928108] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 23.932665] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.938517] ? find_vma+0x30/0x150 [ 23.942028] __get_user_pages+0x50c/0x15f0 [ 23.946237] ? follow_page_mask+0x17f0/0x17f0 [ 23.950710] ? lock_acquire+0x1d5/0x580 [ 23.954656] ? lock_acquire+0x1d5/0x580 [ 23.958596] ? __mm_populate+0x2c7/0x450 [ 23.962626] ? lock_release+0xa40/0xa40 [ 23.966566] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.972423] ? rcu_note_context_switch+0x710/0x710 [ 23.977335] populate_vma_page_range+0x20e/0x2f0 [ 23.982074] ? get_user_pages+0xc0/0xc0 [ 23.986018] ? vmacache_find+0x5f/0x280 [ 23.989967] ? vmacache_update+0xfe/0x130 [ 23.994083] ? find_vma+0x30/0x150 [ 23.997591] __mm_populate+0x23a/0x450 [ 24.001457] ? populate_vma_page_range+0x2f0/0x2f0 [ 24.006353] ? down_read_killable+0x180/0x180 [ 24.010818] ? security_mmap_file+0x143/0x180 [ 24.015284] vm_mmap_pgoff+0x241/0x280 [ 24.019149] ? vma_is_stack_for_current+0xa0/0xa0 [ 24.023958] ? rcu_read_lock_sched_held+0x108/0x120 [ 24.028948] SyS_mmap_pgoff+0x462/0x5f0 [ 24.032892] ? find_mergeable_anon_vma+0xd0/0xd0 [ 24.037616] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.042601] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 24.047326] SyS_mmap+0x16/0x20 [ 24.050572] entry_SYSCALL_64_fastpath+0x23/0x9a [ 24.055295] RIP: 0033:0x44a0b9 [ 24.058450] RSP: 002b:00007f7606cb5d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 24.066137] RAX: ffffffffffffffda RBX: 00000000006dbc24 RCX: 000000000044a0b9 [ 24.073380] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 24.080628] RBP: 0000000000000000 R08: 0000000000000021 R09: 0000000000000000 [ 24.087863] R10: 0000000000008011 R11: 0000000000000212 R12: 00000000006dbc20 [ 24.095099] R13: 6b66722f7665642f R14: 6273752f7665642f R15: 0000000000000005 [ 24.102344] 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 [ 24.121414] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c0017510 [ 24.127943] ---[ end trace 09ac6f3e6b3bee20 ]--- [ 24.132691] Kernel panic - not syncing: Fatal exception [ 24.138398] Dumping ftrace buffer: [ 24.141913] (ftrace buffer empty) [ 24.145591] Kernel Offset: disabled [ 24.149187] Rebooting in 86400 seconds..