[....] Starting enhanced syslogd: rsyslogd[ 11.474083] audit: type=1400 audit(1515285332.433:5): avc: denied { syslog } for pid=3338 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: [ 17.027899] audit: type=1400 audit(1515285337.987:6): 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 '10.128.15.237' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program [ 36.243585] audit: type=1400 audit(1515285357.203:7): avc: denied { map } for pid=3496 comm="syzkaller061349" path="/root/syzkaller061349790" 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 [ 36.269928] audit: type=1400 audit(1515285357.213:8): avc: denied { map } for pid=3496 comm="syzkaller061349" path="/dev/usbmon0" dev="devtmpfs" ino=8939 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 [ 36.298587] page:ffffea000704e500 count:0 mapcount:0 mapping: (null) index:0x0 [ 36.306821] flags: 0x2fffc0000000000() [ 36.310735] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 36.318633] raw: ffffea0007015e60 ffffea000701fe60 0000000000000000 0000000000000000 [ 36.326533] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 36.333635] ------------[ cut here ]------------ [ 36.338359] kernel BUG at ./include/linux/mm.h:844! [ 36.343396] invalid opcode: 0000 [#1] SMP KASAN [ 36.348040] Dumping ftrace buffer: [ 36.351546] (ftrace buffer empty) [ 36.355222] Modules linked in: [ 36.358386] CPU: 1 PID: 3497 Comm: syzkaller061349 Not tainted 4.15.0-rc6+ #160 [ 36.365794] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.375124] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 36.380111] RSP: 0018:ffff8801bf627388 EFLAGS: 00010203 [ 36.385440] RAX: 0000000000000000 RBX: 1ffff10037ec4e73 RCX: 0000000000000000 [ 36.392677] RDX: 0000000000000000 RSI: 1ffff10037ec4dbd RDI: ffffed0037ec4e60 [ 36.399913] RBP: ffff8801bf627460 R08: 1ffff10037ec4d7f R09: 0000000000000000 [ 36.407148] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10037ec4e77 [ 36.414382] R13: dffffc0000000000 R14: ffff8801bf6276b8 R15: ffffea000704e500 [ 36.421628] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f7f31b40 [ 36.429819] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 36.435668] CR2: 00000000208be000 CR3: 00000001c06d4002 CR4: 00000000001606e0 [ 36.442905] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.450139] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.457380] Call Trace: [ 36.459941] ? mon_alloc_buff+0x1a0/0x1a0 [ 36.464056] ? find_held_lock+0x35/0x1d0 [ 36.468091] __do_fault+0xeb/0x30f [ 36.471601] ? pte_offset_kernel+0xc7/0xc7 [ 36.475801] ? rb_insert_color_cached+0x1660/0x1660 [ 36.480784] ? rcutorture_record_progress+0x10/0x10 [ 36.485766] ? check_noncircular+0x20/0x20 [ 36.489970] __handle_mm_fault+0x1d8f/0x3ce0 [ 36.494347] ? __pmd_alloc+0x4e0/0x4e0 [ 36.498201] ? __save_stack_trace+0x7e/0xd0 [ 36.502499] ? find_held_lock+0x35/0x1d0 [ 36.506617] ? handle_mm_fault+0x248/0x8d0 [ 36.510819] ? lock_downgrade+0x980/0x980 [ 36.514953] handle_mm_fault+0x334/0x8d0 [ 36.518984] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 36.523533] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 36.529383] ? find_vma+0x30/0x150 [ 36.532892] __get_user_pages+0x50c/0x15f0 [ 36.537109] ? follow_page_mask+0x17f0/0x17f0 [ 36.541575] ? lock_acquire+0x1d5/0x580 [ 36.545513] ? lock_acquire+0x1d5/0x580 [ 36.549460] ? __mm_populate+0x2c7/0x450 [ 36.553489] ? lock_release+0xa40/0xa40 [ 36.557436] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 36.563295] ? rcu_note_context_switch+0x710/0x710 [ 36.568192] populate_vma_page_range+0x20e/0x2f0 [ 36.572914] ? get_user_pages+0xc0/0xc0 [ 36.576852] ? vmacache_find+0x5f/0x280 [ 36.580791] ? vmacache_update+0xfe/0x130 [ 36.584905] ? find_vma+0x30/0x150 [ 36.588417] __mm_populate+0x23a/0x450 [ 36.592274] ? populate_vma_page_range+0x2f0/0x2f0 [ 36.597170] ? down_read_killable+0x180/0x180 [ 36.601634] ? security_mmap_file+0x143/0x180 [ 36.606100] vm_mmap_pgoff+0x241/0x280 [ 36.609960] ? vma_is_stack_for_current+0xa0/0xa0 [ 36.614777] ? putname+0xee/0x130 [ 36.618195] ? rcu_read_lock_sched_held+0x108/0x120 [ 36.623185] ? kmem_cache_free+0x267/0x2a0 [ 36.627391] SyS_mmap_pgoff+0x462/0x5f0 [ 36.631333] ? find_mergeable_anon_vma+0xd0/0xd0 [ 36.636066] ? do_fast_syscall_32+0x156/0xf9d [ 36.640526] ? find_mergeable_anon_vma+0xd0/0xd0 [ 36.645248] do_fast_syscall_32+0x3ee/0xf9d [ 36.649539] ? do_int80_syscall_32+0x9d0/0x9d0 [ 36.654097] ? syscall_return_slowpath+0x2ad/0x550 [ 36.658990] ? prepare_exit_to_usermode+0x340/0x340 [ 36.663972] ? sysret32_from_system_call+0x5/0x3b [ 36.668782] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.673592] entry_SYSENTER_compat+0x54/0x63 [ 36.677966] RIP: 0023:0xf7f35c79 [ 36.681296] RSP: 002b:00000000f7f311ec EFLAGS: 00000292 ORIG_RAX: 00000000000000c0 [ 36.688976] RAX: ffffffffffffffda RBX: 0000000020ac6000 RCX: 0000000000004000 [ 36.696214] RDX: 0000000001000004 RSI: 0000000000008011 RDI: 000000000000000d [ 36.703458] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 36.710695] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 36.717933] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 36.725175] 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 fb a3 94 fd 48 c7 c6 a0 b1 12 86 4c 89 ff e8 8c 8c bd fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 d7 a3 94 fd [ 36.744241] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801bf627388 [ 36.750768] ---[ end trace 9e9d0516da63986d ]--- [ 36.755672] Kernel panic - not syncing: Fatal exception [ 36.761030] Dumping ftrace buffer: [ 36.764536] (ftrace buffer empty) [ 36.768221] Kernel Offset: disabled [ 36.771813] Rebooting in 86400 seconds..