[....] Starting enhanced syslogd: rsyslogd[ 10.316181] audit: type=1400 audit(1514441503.247:5): avc: denied { syslog } for pid=2985 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: [ 15.971979] audit: type=1400 audit(1514441508.902:6): avc: denied { map } for pid=3126 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 '10.128.0.21' (ECDSA) to the list of known hosts. executing program executing program executing program executing program [ 22.114049] audit: type=1400 audit(1514441515.044:7): avc: denied { map } for pid=3140 comm="syzkaller750546" path="/root/syzkaller750546228" 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 [ 22.140118] audit: type=1400 audit(1514441515.045:8): avc: denied { map } for pid=3140 comm="syzkaller750546" path="/dev/usbmon0" dev="devtmpfs" ino=8949 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 [ 22.172060] page:00000000ce1a8bc5 count:0 mapcount:0 mapping: (null) index:0x0 [ 22.180351] flags: 0x2fffc0000000000() [ 22.184248] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 22.192169] raw: ffffea0006ee4460 ffffea000727b520 0000000000000000 0000000000000000 [ 22.200079] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 22.207188] ------------[ cut here ]------------ [ 22.211912] kernel BUG at ./include/linux/mm.h:844! [ 22.216943] invalid opcode: 0000 [#1] SMP KASAN [ 22.221583] Dumping ftrace buffer: [ 22.225087] (ftrace buffer empty) [ 22.228764] Modules linked in: [ 22.231924] CPU: 1 PID: 3141 Comm: syzkaller750546 Not tainted 4.15.0-rc5+ #149 [ 22.239340] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 22.248667] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 22.253644] RSP: 0018:ffff8801c93a7388 EFLAGS: 00010203 [ 22.258977] RAX: 0000000000000000 RBX: 1ffff10039274e73 RCX: 0000000000000000 [ 22.266212] RDX: 0000000000000000 RSI: 1ffff10039274dbd RDI: ffffed0039274e60 [ 22.273446] RBP: ffff8801c93a7460 R08: 1ffff10039274d7f R09: 0000000000000000 [ 22.280680] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10039274e77 [ 22.287914] R13: dffffc0000000000 R14: ffff8801c93a76b8 R15: ffffea0007274ac0 [ 22.295149] FS: 0000000000000000(0000) GS:ffff8801db500000(0063) knlGS:00000000f7f39b40 [ 22.303341] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 22.309185] CR2: 00000000208be000 CR3: 00000001ce0d1004 CR4: 00000000001606e0 [ 22.316420] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.323653] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.330888] Call Trace: [ 22.333442] ? mon_alloc_buff+0x1a0/0x1a0 [ 22.337556] ? find_held_lock+0x35/0x1d0 [ 22.341589] __do_fault+0xeb/0x30f [ 22.345097] ? pte_offset_kernel+0xc7/0xc7 [ 22.349298] ? rb_insert_color_cached+0x1660/0x1660 [ 22.354281] ? rcutorture_record_progress+0x10/0x10 [ 22.359261] ? check_noncircular+0x20/0x20 [ 22.363465] __handle_mm_fault+0x1d8f/0x3ce0 [ 22.367839] ? __pmd_alloc+0x4e0/0x4e0 [ 22.371690] ? __save_stack_trace+0x7e/0xd0 [ 22.375977] ? find_held_lock+0x35/0x1d0 [ 22.380005] ? handle_mm_fault+0x248/0x8d0 [ 22.384204] ? lock_downgrade+0x980/0x980 [ 22.388327] handle_mm_fault+0x334/0x8d0 [ 22.392354] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 22.396904] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 22.402752] ? find_vma+0x30/0x150 [ 22.406258] __get_user_pages+0x50c/0x15f0 [ 22.410463] ? follow_page_mask+0x17f0/0x17f0 [ 22.414928] ? lock_acquire+0x1d5/0x580 [ 22.418864] ? lock_acquire+0x1d5/0x580 [ 22.422802] ? __mm_populate+0x2c7/0x450 [ 22.426828] ? lock_release+0xa40/0xa40 [ 22.430765] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 22.436616] ? rcu_note_context_switch+0x710/0x710 [ 22.441513] populate_vma_page_range+0x20e/0x2f0 [ 22.446236] ? get_user_pages+0xc0/0xc0 [ 22.450175] ? vmacache_find+0x5f/0x280 [ 22.454122] ? vmacache_update+0xfe/0x130 [ 22.458234] ? find_vma+0x30/0x150 [ 22.461737] __mm_populate+0x23a/0x450 [ 22.465591] ? populate_vma_page_range+0x2f0/0x2f0 [ 22.470483] ? down_read_killable+0x180/0x180 [ 22.474941] ? security_mmap_file+0x143/0x180 [ 22.479403] vm_mmap_pgoff+0x241/0x280 [ 22.483267] ? vma_is_stack_for_current+0xa0/0xa0 [ 22.488075] ? putname+0xee/0x130 [ 22.491494] ? rcu_read_lock_sched_held+0x108/0x120 [ 22.496473] ? kmem_cache_free+0x267/0x2a0 [ 22.500686] SyS_mmap_pgoff+0x462/0x5f0 [ 22.504626] ? find_mergeable_anon_vma+0xd0/0xd0 [ 22.509345] ? do_fast_syscall_32+0x156/0xf9d [ 22.513814] ? find_mergeable_anon_vma+0xd0/0xd0 [ 22.518537] do_fast_syscall_32+0x3ee/0xf9d [ 22.522824] ? do_int80_syscall_32+0x9d0/0x9d0 [ 22.527373] ? syscall_return_slowpath+0x2ad/0x550 [ 22.532271] ? prepare_exit_to_usermode+0x340/0x340 [ 22.537253] ? sysret32_from_system_call+0x5/0x3b [ 22.542068] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 22.546883] entry_SYSENTER_compat+0x54/0x63 [ 22.551255] RIP: 0023:0xf7f3dc79 [ 22.554597] RSP: 002b:00000000f7f391ec EFLAGS: 00000292 ORIG_RAX: 00000000000000c0 [ 22.562274] RAX: ffffffffffffffda RBX: 0000000020ac6000 RCX: 0000000000004000 [ 22.569507] RDX: 0000000001000004 RSI: 0000000000008011 RDI: 000000000000000a [ 22.576740] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 22.583982] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 22.591216] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 22.598457] 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 bd a4 fd 48 c7 c6 c0 c0 70 85 4c 89 ff e8 2c a3 cd fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 c7 bd a4 fd [ 22.617519] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c93a7388 [ 22.624033] ---[ end trace 0da7b6034a71a06d ]--- [ 22.628763] Kernel panic - not syncing: Fatal exception [ 22.634450] Dumping ftrace buffer: [ 22.637954] (ftrace buffer empty) [ 22.641630] Kernel Offset: disabled [ 22.645222] Rebooting in 86400 seconds..