[?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. [ 13.310454] audit: type=1400 audit(1515464636.482:6): avc: denied { map } for pid=3456 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 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.19' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 23.506057] audit: type=1400 audit(1515464646.677:7): avc: denied { map } for pid=3471 comm="syzkaller927827" path="/root/syzkaller927827447" 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 [ 23.534665] audit: type=1400 audit(1515464646.706:8): avc: denied { map } for pid=3471 comm="syzkaller927827" path="/dev/usbmon0" dev="devtmpfs" ino=1124 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 [ 23.572884] page:ffffea000701e880 count:0 mapcount:0 mapping: (null) index:0x0 [ 23.581129] flags: 0x2fffc0000000000() [ 23.585058] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 23.592938] raw: ffffea000701a560 ffffea0007026f60 0000000000000000 0000000000000000 [ 23.600820] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 23.607914] ------------[ cut here ]------------ [ 23.612638] kernel BUG at ./include/linux/mm.h:844! [ 23.617660] invalid opcode: 0000 [#1] SMP KASAN [ 23.622303] Dumping ftrace buffer: [ 23.625809] (ftrace buffer empty) [ 23.629486] Modules linked in: [ 23.632655] CPU: 1 PID: 3472 Comm: syzkaller927827 Not tainted 4.15.0-rc7+ #253 [ 23.640087] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.649418] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 23.654396] RSP: 0018:ffff8801c0047510 EFLAGS: 00010203 [ 23.659724] RAX: 0000000000000000 RBX: 1ffff10038008ea4 RCX: 0000000000000000 [ 23.666961] RDX: 0000000000000000 RSI: 1ffff10038008dee RDI: ffffed0038008e90 [ 23.674200] RBP: ffff8801c00475e8 R08: 1ffff10038008db0 R09: 0000000000000000 [ 23.681445] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10038008ea8 [ 23.688688] R13: dffffc0000000000 R14: ffff8801c0047840 R15: ffffea000701e880 [ 23.695927] FS: 00007fe4f3a96700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 23.704117] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.709965] CR2: 00000000203a5000 CR3: 00000001c02b8003 CR4: 00000000001606e0 [ 23.717210] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.724453] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.731688] Call Trace: [ 23.734248] ? mon_alloc_buff+0x1a0/0x1a0 [ 23.738367] ? finish_fault+0x1b4/0x2a0 [ 23.742310] ? lock_downgrade+0x980/0x980 [ 23.746425] ? do_swap_page+0x2c50/0x2c50 [ 23.750541] __do_fault+0xeb/0x30f [ 23.754051] ? pte_offset_kernel+0xc7/0xc7 [ 23.758255] ? check_noncircular+0x20/0x20 [ 23.762457] ? _raw_spin_unlock+0x22/0x30 [ 23.766579] __handle_mm_fault+0x1d8f/0x3ce0 [ 23.770958] ? __pmd_alloc+0x4e0/0x4e0 [ 23.774905] ? __save_stack_trace+0x7e/0xd0 [ 23.779196] ? find_held_lock+0x35/0x1d0 [ 23.783224] ? handle_mm_fault+0x248/0x8d0 [ 23.787425] ? lock_downgrade+0x980/0x980 [ 23.791559] handle_mm_fault+0x334/0x8d0 [ 23.795586] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 23.800138] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.805987] ? find_vma+0x30/0x150 [ 23.809500] __get_user_pages+0x50c/0x15f0 [ 23.813706] ? follow_page_mask+0x17f0/0x17f0 [ 23.818170] ? lock_acquire+0x1d5/0x580 [ 23.822110] ? lock_acquire+0x1d5/0x580 [ 23.826052] ? __mm_populate+0x2c7/0x450 [ 23.830086] ? lock_release+0xa40/0xa40 [ 23.834032] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.839887] ? rcu_note_context_switch+0x710/0x710 [ 23.844786] populate_vma_page_range+0x20e/0x2f0 [ 23.849510] ? get_user_pages+0xc0/0xc0 [ 23.853451] ? vmacache_find+0x5f/0x280 [ 23.857400] ? vmacache_update+0xfe/0x130 [ 23.861517] ? find_vma+0x30/0x150 [ 23.865027] __mm_populate+0x23a/0x450 [ 23.868884] ? populate_vma_page_range+0x2f0/0x2f0 [ 23.873779] ? down_read_killable+0x180/0x180 [ 23.878241] ? security_mmap_file+0x143/0x180 [ 23.882704] vm_mmap_pgoff+0x241/0x280 [ 23.886560] ? vma_is_stack_for_current+0xa0/0xa0 [ 23.891370] ? putname+0xee/0x130 [ 23.894790] ? rcu_read_lock_sched_held+0x108/0x120 [ 23.899772] ? kmem_cache_free+0x267/0x2a0 [ 23.903977] SyS_mmap_pgoff+0x462/0x5f0 [ 23.907940] ? find_mergeable_anon_vma+0xd0/0xd0 [ 23.912663] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.917648] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 23.922375] SyS_mmap+0x16/0x20 [ 23.925623] entry_SYSCALL_64_fastpath+0x23/0x9a [ 23.930349] RIP: 0033:0x449b99 [ 23.933506] RSP: 002b:00007fe4f3a95d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 23.941179] RAX: ffffffffffffffda RBX: 00000000006dbc24 RCX: 0000000000449b99 [ 23.948418] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 23.955664] RBP: 00000000006dbc20 R08: 0000000000000019 R09: 0000000000000000 [ 23.962902] R10: 0000000000008011 R11: 0000000000000212 R12: 78756e696c65732f [ 23.970139] R13: 7361682f6376612f R14: 6273752f7665642f R15: 000000000000000b [ 23.977384] 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 bb 9d 94 fd 48 c7 c6 a0 b1 12 86 4c 89 ff e8 cc 8a bd fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 97 9d 94 fd [ 23.996542] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c0047510 [ 24.003082] ---[ end trace e112437d1b8de5dc ]--- [ 24.008280] Kernel panic - not syncing: Fatal exception [ 24.014036] Dumping ftrace buffer: [ 24.017551] (ftrace buffer empty) [ 24.021229] Kernel Offset: disabled [ 24.024824] Rebooting in 86400 seconds..