[....] Starting enhanced syslogd: rsyslogd[ 12.222644] audit: type=1400 audit(1515562552.909:5): avc: denied { syslog } for pid=3346 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: [ 20.143565] audit: type=1400 audit(1515562560.830:6): avc: denied { map } for pid=3486 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 '10.128.0.2' (ECDSA) to the list of known hosts. executing program executing program [ 26.380063] audit: type=1400 audit(1515562567.066:7): avc: denied { map } for pid=3500 comm="syzkaller368081" path="/root/syzkaller368081294" 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 [ 26.414895] audit: type=1400 audit(1515562567.101:8): avc: denied { map } for pid=3500 comm="syzkaller368081" path="/dev/usbmon0" dev="devtmpfs" ino=8796 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 [ 26.456080] page:ffffea000701f5c0 count:0 mapcount:0 mapping: (null) index:0x0 [ 26.464504] flags: 0x2fffc0000000000() [ 26.468426] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 26.476340] raw: ffffea000701cae0 ffffea000705c520 0000000000000000 0000000000000000 [ 26.484242] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 26.491364] ------------[ cut here ]------------ [ 26.496095] kernel BUG at ./include/linux/mm.h:844! [ 26.501144] invalid opcode: 0000 [#1] SMP KASAN [ 26.505792] Dumping ftrace buffer: [ 26.509300] (ftrace buffer empty) [ 26.512980] Modules linked in: [ 26.516151] CPU: 1 PID: 3502 Comm: syzkaller368081 Not tainted 4.15.0-rc7+ #165 [ 26.523562] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.533572] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 26.538556] RSP: 0018:ffff8801c7f57388 EFLAGS: 00010203 [ 26.543890] RAX: 0000000000000000 RBX: 1ffff10038feae73 RCX: 0000000000000000 [ 26.551135] RDX: 0000000000000000 RSI: 1ffff10038feadbd RDI: ffffed0038feae60 [ 26.558381] RBP: ffff8801c7f57460 R08: 1ffff10038fead7f R09: 0000000000000000 [ 26.565620] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10038feae77 [ 26.572869] R13: dffffc0000000000 R14: ffff8801c7f576b8 R15: ffffea000701f5c0 [ 26.580112] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f7f53b40 [ 26.588306] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 26.594156] CR2: 00000000208be000 CR3: 00000001c0aef003 CR4: 00000000001606e0 [ 26.601397] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 26.608639] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 26.615878] Call Trace: [ 26.618443] ? mon_alloc_buff+0x1a0/0x1a0 [ 26.622566] ? finish_fault+0x1b4/0x2a0 [ 26.626510] ? lock_downgrade+0x980/0x980 [ 26.630648] ? do_swap_page+0x2c50/0x2c50 [ 26.634793] __do_fault+0xeb/0x30f [ 26.638321] ? perf_trace_lock+0xd6/0x900 [ 26.642462] ? pte_offset_kernel+0xc7/0xc7 [ 26.646698] ? trace_event_raw_event_lock+0x340/0x340 [ 26.651862] ? check_noncircular+0x20/0x20 [ 26.656073] ? _raw_spin_unlock+0x22/0x30 [ 26.660199] __handle_mm_fault+0x1d8f/0x3ce0 [ 26.664580] ? __pmd_alloc+0x4e0/0x4e0 [ 26.668434] ? trace_event_raw_event_lock+0x340/0x340 [ 26.673598] ? find_held_lock+0x35/0x1d0 [ 26.677632] ? handle_mm_fault+0x248/0x8d0 [ 26.681835] ? lock_downgrade+0x980/0x980 [ 26.685974] handle_mm_fault+0x334/0x8d0 [ 26.690024] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 26.694580] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 26.700448] ? find_vma+0x30/0x150 [ 26.703962] __get_user_pages+0x50c/0x15f0 [ 26.708176] ? follow_page_mask+0x17f0/0x17f0 [ 26.712665] ? lock_acquire+0x1d5/0x580 [ 26.716609] ? lock_acquire+0x1d5/0x580 [ 26.720551] ? __mm_populate+0x2c7/0x450 [ 26.724586] ? lock_release+0xa40/0xa40 [ 26.728540] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 26.734399] ? rcu_note_context_switch+0x710/0x710 [ 26.739303] populate_vma_page_range+0x20e/0x2f0 [ 26.744033] ? get_user_pages+0xc0/0xc0 [ 26.747979] ? vmacache_find+0x5f/0x280 [ 26.751924] ? vmacache_update+0xfe/0x130 [ 26.756050] ? find_vma+0x30/0x150 [ 26.759571] __mm_populate+0x23a/0x450 [ 26.763443] ? populate_vma_page_range+0x2f0/0x2f0 [ 26.768344] ? down_read_killable+0x180/0x180 [ 26.772822] ? security_mmap_file+0x143/0x180 [ 26.777306] vm_mmap_pgoff+0x241/0x280 [ 26.781189] ? vma_is_stack_for_current+0xa0/0xa0 [ 26.786005] ? putname+0xee/0x130 [ 26.789445] ? rcu_read_lock_sched_held+0x108/0x120 [ 26.794431] ? kmem_cache_free+0x267/0x2a0 [ 26.798642] SyS_mmap_pgoff+0x462/0x5f0 [ 26.802589] ? find_mergeable_anon_vma+0xd0/0xd0 [ 26.807314] ? do_fast_syscall_32+0x156/0xf9d [ 26.811781] ? find_mergeable_anon_vma+0xd0/0xd0 [ 26.816517] do_fast_syscall_32+0x3ee/0xf9d [ 26.820811] ? do_int80_syscall_32+0x9d0/0x9d0 [ 26.825367] ? syscall_return_slowpath+0x2ad/0x550 [ 26.830263] ? prepare_exit_to_usermode+0x340/0x340 [ 26.835250] ? sysret32_from_system_call+0x5/0x3b [ 26.840065] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.844882] entry_SYSENTER_compat+0x54/0x63 [ 26.849259] RIP: 0023:0xf7f78c79 [ 26.852590] RSP: 002b:00000000f7f531ec EFLAGS: 00000292 ORIG_RAX: 00000000000000c0 [ 26.860265] RAX: ffffffffffffffda RBX: 0000000020ac6000 RCX: 0000000000004000 [ 26.867505] RDX: 0000000001000004 RSI: 0000000000008011 RDI: 0000000000000014 [ 26.874745] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 26.881983] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 26.889221] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 26.896479] 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 [ 26.915592] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c7f57388 [ 26.922142] ---[ end trace 01c61d6feaf5d344 ]--- [ 26.926961] Kernel panic - not syncing: Fatal exception [ 26.932704] Dumping ftrace buffer: [ 26.936216] (ftrace buffer empty) [ 26.939912] Kernel Offset: disabled [ 26.943511] Rebooting in 86400 seconds..