[....] Starting enhanced syslogd: rsyslogd[ 11.966393] audit: type=1400 audit(1514739001.131:5): avc: denied { syslog } for pid=2998 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: [ 17.388166] audit: type=1400 audit(1514739006.552:6): avc: denied { map } for pid=3138 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 '10.128.0.14' (ECDSA) to the list of known hosts. executing program executing program executing program executing program [ 23.575179] audit: type=1400 audit(1514739012.739:7): avc: denied { map } for pid=3152 comm="syzkaller846921" path="/root/syzkaller846921430" 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 [ 23.601238] audit: type=1400 audit(1514739012.740:8): avc: denied { map } for pid=3152 comm="syzkaller846921" path="/dev/usbmon0" dev="devtmpfs" ino=1076 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 [ 23.659689] page:00000000fa143f07 count:0 mapcount:0 mapping: (null) index:0x0 [ 23.667960] flags: 0x2fffc0000000000() [ 23.671890] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 23.679792] raw: ffffea00071d3da0 ffffea00071ec6e0 0000000000000000 0000000000000000 [ 23.687705] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 23.694814] ------------[ cut here ]------------ [ 23.699543] kernel BUG at ./include/linux/mm.h:844! [ 23.704572] invalid opcode: 0000 [#1] SMP KASAN [ 23.709224] Dumping ftrace buffer: [ 23.712731] (ftrace buffer empty) [ 23.716408] Modules linked in: [ 23.719572] CPU: 1 PID: 3153 Comm: syzkaller846921 Not tainted 4.15.0-rc4-next-20171221+ #78 [ 23.728117] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.737447] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 23.742436] RSP: 0018:ffff8801c7807510 EFLAGS: 00010203 [ 23.747768] RAX: 0000000000000000 RBX: 1ffff10038f00ea4 RCX: 0000000000000000 [ 23.755021] RDX: 0000000000000000 RSI: 1ffff10038f00dee RDI: ffffed0038f00e90 [ 23.762263] RBP: ffff8801c78075e8 R08: 1ffff10038f00db0 R09: 0000000000000000 [ 23.769500] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10038f00ea8 [ 23.776747] R13: dffffc0000000000 R14: ffff8801c7807840 R15: ffffea00071ec680 [ 23.783988] FS: 00007f8548e01700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 23.792183] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.798050] CR2: 00000000208be000 CR3: 00000001c8bbe004 CR4: 00000000001606e0 [ 23.805292] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.812530] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.819766] Call Trace: [ 23.822327] ? mon_alloc_buff+0x1a0/0x1a0 [ 23.826445] ? find_held_lock+0x35/0x1d0 [ 23.830484] __do_fault+0xeb/0x30f [ 23.833994] ? vma_gap_callbacks_rotate+0x62/0x80 [ 23.838808] ? pte_offset_kernel+0xc7/0xc7 [ 23.843024] ? print_irqtrace_events+0x270/0x270 [ 23.847749] ? rb_insert_color_cached+0x1660/0x1660 [ 23.852735] ? vma_compute_subtree_gap+0x200/0x200 [ 23.857642] ? rb_insert_color_cached+0x1660/0x1660 [ 23.862627] ? check_noncircular+0x20/0x20 [ 23.866841] __handle_mm_fault+0x1d8f/0x3ce0 [ 23.871231] ? __pmd_alloc+0x4e0/0x4e0 [ 23.875099] ? find_held_lock+0x35/0x1d0 [ 23.879142] ? handle_mm_fault+0x2a0/0x930 [ 23.883345] ? lock_downgrade+0x980/0x980 [ 23.887470] handle_mm_fault+0x38f/0x930 [ 23.891500] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 23.896050] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.901900] ? find_vma+0x30/0x150 [ 23.905420] __get_user_pages+0x50c/0x15f0 [ 23.909638] ? follow_page_mask+0x17f0/0x17f0 [ 23.914112] ? vma_link+0xe9/0x170 [ 23.917622] ? lock_acquire+0x1d5/0x580 [ 23.921579] ? lock_acquire+0x1d5/0x580 [ 23.925538] ? __mm_populate+0x2c7/0x450 [ 23.929581] ? lock_release+0xa40/0xa40 [ 23.933521] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.939374] ? rcu_note_context_switch+0x710/0x710 [ 23.944285] populate_vma_page_range+0x20e/0x2f0 [ 23.949016] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 23.953915] ? vmacache_find+0x5f/0x280 [ 23.957855] ? vmacache_update+0xfe/0x130 [ 23.961971] ? find_vma+0x30/0x150 [ 23.965479] __mm_populate+0x23a/0x450 [ 23.969346] ? populate_vma_page_range+0x2f0/0x2f0 [ 23.974250] ? down_read_killable+0x180/0x180 [ 23.978714] ? security_mmap_file+0x143/0x180 [ 23.983189] vm_mmap_pgoff+0x241/0x280 [ 23.987056] ? vma_is_stack_for_current+0xa0/0xa0 [ 23.991876] ? putname+0xee/0x130 [ 23.995301] ? rcu_read_lock_sched_held+0x108/0x120 [ 24.000287] ? kmem_cache_free+0x267/0x2a0 [ 24.004502] SyS_mmap_pgoff+0x462/0x5f0 [ 24.008458] ? find_mergeable_anon_vma+0xd0/0xd0 [ 24.013183] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.018188] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 24.022915] SyS_mmap+0x16/0x20 [ 24.026169] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 24.030900] RIP: 0033:0x449229 [ 24.034060] RSP: 002b:00007f8548e00d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 24.041745] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449229 [ 24.048983] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 24.056221] RBP: 0000000000000000 R08: 000000000000000d R09: 0000000000000000 [ 24.063460] R10: 0000000000008011 R11: 0000000000000212 R12: 00000000006dac20 [ 24.070711] R13: 6273752f7665642f R14: 00007f8548e019c0 R15: 0000000000000005 [ 24.077979] 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 eb f2 96 fd 48 c7 c6 20 1f d1 85 4c 89 ff e8 8c b4 c0 fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 c7 f2 96 fd [ 24.097061] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c7807510 [ 24.103616] ---[ end trace fd8b108c0ed6341b ]--- [ 24.108758] Kernel panic - not syncing: Fatal exception [ 24.114570] Dumping ftrace buffer: [ 24.118170] (ftrace buffer empty) [ 24.121849] Kernel Offset: disabled [ 24.125446] Rebooting in 86400 seconds..