[....] Starting enhanced syslogd: rsyslogd[ 11.254404] audit: type=1400 audit(1514702772.808:5): avc: denied { syslog } for pid=2993 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: [ 18.280389] audit: type=1400 audit(1514702779.834:6): avc: denied { map } for pid=3134 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 '10.128.15.193' (ECDSA) to the list of known hosts. executing program executing program executing program executing program [ 24.446572] audit: type=1400 audit(1514702786.000:7): avc: denied { map } for pid=3148 comm="syzkaller065040" path="/root/syzkaller065040042" 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 [ 24.472607] audit: type=1400 audit(1514702786.000:8): avc: denied { map } for pid=3148 comm="syzkaller065040" path="/dev/usbmon0" dev="devtmpfs" ino=8878 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 [ 24.504368] page:ffffea000722fd80 count:0 mapcount:0 mapping: (null) index:0x0 [ 24.512585] flags: 0x2fffc0000000000() [ 24.516477] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 24.524346] raw: ffffea000722f220 ffffea000722fde0 0000000000000000 0000000000000000 [ 24.532232] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 24.539405] ------------[ cut here ]------------ [ 24.544127] kernel BUG at ./include/linux/mm.h:844! [ 24.549223] invalid opcode: 0000 [#1] SMP KASAN [ 24.553857] Dumping ftrace buffer: [ 24.557361] (ftrace buffer empty) [ 24.561039] Modules linked in: [ 24.564199] CPU: 0 PID: 3149 Comm: syzkaller065040 Not tainted 4.15.0-rc4-mm1+ #49 [ 24.571869] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.581195] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 24.586174] RSP: 0018:ffff8801c896f510 EFLAGS: 00010203 [ 24.591501] RAX: 0000000000000000 RBX: 1ffff1003912dea4 RCX: 0000000000000000 [ 24.598735] RDX: 0000000000000000 RSI: 1ffff1003912ddee RDI: ffffed003912de90 [ 24.605972] RBP: ffff8801c896f5e8 R08: 1ffff1003912ddb0 R09: 0000000000000000 [ 24.613206] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff1003912dea8 [ 24.620451] R13: dffffc0000000000 R14: ffff8801c896f840 R15: ffffea000722fd80 [ 24.627688] FS: 00007ff878b35700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 24.635879] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.641725] CR2: 00000000208be000 CR3: 00000001c9940002 CR4: 00000000001606f0 [ 24.648962] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.656199] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.663442] Call Trace: [ 24.666004] ? mon_alloc_buff+0x1a0/0x1a0 [ 24.670118] ? find_held_lock+0x35/0x1d0 [ 24.674152] __do_fault+0xeb/0x30f [ 24.677656] ? vma_gap_callbacks_rotate+0x62/0x80 [ 24.682463] ? pte_offset_kernel+0xc7/0xc7 [ 24.686660] ? print_irqtrace_events+0x270/0x270 [ 24.691379] ? rb_insert_color_cached+0x1660/0x1660 [ 24.696359] ? vma_compute_subtree_gap+0x200/0x200 [ 24.701253] ? rb_insert_color_cached+0x1660/0x1660 [ 24.706234] ? check_noncircular+0x20/0x20 [ 24.710434] __handle_mm_fault+0x1d8f/0x3ce0 [ 24.714808] ? __pmd_alloc+0x4e0/0x4e0 [ 24.718674] ? find_held_lock+0x35/0x1d0 [ 24.722701] ? handle_mm_fault+0x2a0/0x930 [ 24.726899] ? lock_downgrade+0x980/0x980 [ 24.731026] handle_mm_fault+0x38f/0x930 [ 24.735063] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 24.739609] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 24.745456] ? find_vma+0x30/0x150 [ 24.748966] __get_user_pages+0x50c/0x15f0 [ 24.753171] ? follow_page_mask+0x17f0/0x17f0 [ 24.757631] ? vma_link+0xe9/0x170 [ 24.761137] ? lock_acquire+0x1d5/0x580 [ 24.765073] ? lock_acquire+0x1d5/0x580 [ 24.769013] ? __mm_populate+0x2c7/0x450 [ 24.773040] ? lock_release+0xa40/0xa40 [ 24.776980] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 24.782831] ? rcu_note_context_switch+0x710/0x710 [ 24.787727] populate_vma_page_range+0x20e/0x2f0 [ 24.792447] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 24.797338] ? vmacache_find+0x5f/0x280 [ 24.801274] ? vmacache_update+0xfe/0x130 [ 24.805386] ? find_vma+0x30/0x150 [ 24.808897] __mm_populate+0x23a/0x450 [ 24.812752] ? populate_vma_page_range+0x2f0/0x2f0 [ 24.817646] ? down_read_killable+0x180/0x180 [ 24.822107] ? security_mmap_file+0x143/0x180 [ 24.826581] vm_mmap_pgoff+0x241/0x280 [ 24.830444] ? vma_is_stack_for_current+0xa0/0xa0 [ 24.835250] ? putname+0xee/0x130 [ 24.838667] ? rcu_read_lock_sched_held+0x108/0x120 [ 24.843646] ? kmem_cache_free+0x267/0x2a0 [ 24.847858] SyS_mmap_pgoff+0x462/0x5f0 [ 24.851808] ? find_mergeable_anon_vma+0xd0/0xd0 [ 24.856527] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.861507] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 24.866239] SyS_mmap+0x16/0x20 [ 24.869484] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 24.874203] RIP: 0033:0x449269 [ 24.877359] RSP: 002b:00007ff878b34d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 24.885030] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449269 [ 24.892265] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 24.899499] RBP: 00000000006dac20 R08: 0000000000000014 R09: 0000000000000000 [ 24.906745] R10: 0000000000008011 R11: 0000000000000212 R12: 6273752f7665642f [ 24.913981] R13: 702f74656e2f666c R14: 65732f636f72702f R15: 0000000000000005 [ 24.921223] 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 db e1 96 fd 48 c7 c6 80 1f d1 85 4c 89 ff e8 6c a3 c0 fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 b7 e1 96 fd [ 24.940292] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c896f510 [ 24.946809] ---[ end trace b56bf0c9dab04d3c ]--- [ 24.951562] Kernel panic - not syncing: Fatal exception [ 24.956923] Dumping ftrace buffer: [ 24.960432] (ftrace buffer empty) [ 24.964119] Kernel Offset: disabled [ 24.967713] Rebooting in 86400 seconds..