[....] Starting enhanced syslogd: rsyslogd[ 10.528288] audit: type=1400 audit(1514751670.690:5): avc: denied { syslog } for pid=2988 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: [ 16.416171] audit: type=1400 audit(1514751676.577:6): avc: denied { map } for pid=3128 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 '10.128.15.198' (ECDSA) to the list of known hosts. executing program executing program executing program executing program [ 43.279910] audit: type=1400 audit(1514751703.441:7): avc: denied { map } for pid=3146 comm="syzkaller295577" path="/root/syzkaller295577368" 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 [ 43.305913] audit: type=1400 audit(1514751703.441:8): avc: denied { map } for pid=3146 comm="syzkaller295577" path="/dev/usbmon0" dev="devtmpfs" ino=1058 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 [ 43.332418] page:ffffea0007207fc0 count:0 mapcount:0 mapping: (null) index:0x0 [ 43.340596] flags: 0x2fffc0000000000() [ 43.344625] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 43.352609] raw: ffffea0007203aa0 ffffea0007200520 0000000000000000 0000000000000000 [ 43.360487] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 43.367558] ------------[ cut here ]------------ [ 43.372279] kernel BUG at ./include/linux/mm.h:844! [ 43.377306] invalid opcode: 0000 [#1] SMP KASAN [ 43.381946] Dumping ftrace buffer: [ 43.385450] (ftrace buffer empty) [ 43.389125] Modules linked in: [ 43.392284] CPU: 1 PID: 3147 Comm: syzkaller295577 Not tainted 4.15.0-rc4-mm1+ #49 [ 43.399952] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.409285] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 43.414262] RSP: 0018:ffff8801c81f7510 EFLAGS: 00010203 [ 43.419594] RAX: 0000000000000000 RBX: 1ffff1003903eea4 RCX: 0000000000000000 [ 43.426832] RDX: 0000000000000000 RSI: 1ffff1003903edee RDI: ffffed003903ee90 [ 43.434067] RBP: ffff8801c81f75e8 R08: 1ffff1003903edb0 R09: 0000000000000000 [ 43.441302] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff1003903eea8 [ 43.448537] R13: dffffc0000000000 R14: ffff8801c81f7840 R15: ffffea0007207fc0 [ 43.455772] FS: 00007faa4f868700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 43.463961] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 43.469806] CR2: 000055c338e500b8 CR3: 00000001ca1e8006 CR4: 00000000001606e0 [ 43.477043] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 43.484277] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 43.491510] Call Trace: [ 43.494066] ? mon_alloc_buff+0x1a0/0x1a0 [ 43.498176] ? find_held_lock+0x35/0x1d0 [ 43.502210] __do_fault+0xeb/0x30f [ 43.505714] ? vma_gap_callbacks_rotate+0x62/0x80 [ 43.510526] ? pte_offset_kernel+0xc7/0xc7 [ 43.514728] ? print_irqtrace_events+0x270/0x270 [ 43.519449] ? rb_insert_color_cached+0x1660/0x1660 [ 43.524431] ? vma_compute_subtree_gap+0x200/0x200 [ 43.529323] ? rb_insert_color_cached+0x1660/0x1660 [ 43.534302] ? check_noncircular+0x20/0x20 [ 43.538685] __handle_mm_fault+0x1d8f/0x3ce0 [ 43.543075] ? __pmd_alloc+0x4e0/0x4e0 [ 43.546931] ? find_held_lock+0x35/0x1d0 [ 43.550958] ? handle_mm_fault+0x2a0/0x930 [ 43.555157] ? lock_downgrade+0x980/0x980 [ 43.559287] handle_mm_fault+0x38f/0x930 [ 43.563312] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 43.567863] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 43.573712] ? find_vma+0x30/0x150 [ 43.577226] __get_user_pages+0x50c/0x15f0 [ 43.581430] ? follow_page_mask+0x17f0/0x17f0 [ 43.585892] ? vma_link+0xe9/0x170 [ 43.589401] ? lock_acquire+0x1d5/0x580 [ 43.593344] ? lock_acquire+0x1d5/0x580 [ 43.597283] ? __mm_populate+0x2c7/0x450 [ 43.601311] ? lock_release+0xa40/0xa40 [ 43.605250] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 43.611100] ? rcu_note_context_switch+0x710/0x710 [ 43.615996] populate_vma_page_range+0x20e/0x2f0 [ 43.620718] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 43.625612] ? vmacache_find+0x5f/0x280 [ 43.629548] ? vmacache_update+0xfe/0x130 [ 43.633661] ? find_vma+0x30/0x150 [ 43.637166] __mm_populate+0x23a/0x450 [ 43.641018] ? populate_vma_page_range+0x2f0/0x2f0 [ 43.645909] ? down_read_killable+0x180/0x180 [ 43.650368] ? security_mmap_file+0x143/0x180 [ 43.654833] vm_mmap_pgoff+0x241/0x280 [ 43.658687] ? vma_is_stack_for_current+0xa0/0xa0 [ 43.663500] SyS_mmap_pgoff+0x462/0x5f0 [ 43.667449] ? find_mergeable_anon_vma+0xd0/0xd0 [ 43.672168] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 43.677246] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 43.681966] SyS_mmap+0x16/0x20 [ 43.685210] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 43.689939] RIP: 0033:0x449309 [ 43.693268] RSP: 002b:00007faa4f867d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 43.700938] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449309 [ 43.708173] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 43.715406] RBP: 0000000000000000 R08: 0000000000000009 R09: 0000000000000000 [ 43.722641] R10: 0000000000008011 R11: 0000000000000212 R12: 00000000006dac20 [ 43.729885] R13: 6273752f7665642f R14: 00007faa4f8689c0 R15: 0000000000000009 [ 43.737125] 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 [ 43.756186] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c81f7510 [ 43.762701] ---[ end trace 636f01cf33406cc6 ]--- [ 43.767666] Kernel panic - not syncing: Fatal exception [ 43.773364] Dumping ftrace buffer: [ 43.776870] (ftrace buffer empty) [ 43.780546] Kernel Offset: disabled [ 43.784140] Rebooting in 86400 seconds..