[ 12.497426] audit: type=1400 audit(1515285385.486:5): avc: denied { syslog } for pid=3341 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [....] Starting enhanced syslogd: rsyslogd[?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: [ 17.263851] audit: type=1400 audit(1515285390.253:6): avc: denied { map } for pid=3483 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 '10.128.0.29' (ECDSA) to the list of known hosts. executing program executing program executing program [ 23.538065] audit: type=1400 audit(1515285396.527:7): avc: denied { map } for pid=3498 comm="syzkaller533960" path="/root/syzkaller533960568" 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 [ 23.565580] audit: type=1400 audit(1515285396.555:8): avc: denied { map } for pid=3498 comm="syzkaller533960" path="/dev/usbmon0" dev="devtmpfs" ino=8887 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 [ 23.594938] page:ffffea0007000dc0 count:0 mapcount:0 mapping: (null) index:0x0 [ 23.603210] flags: 0x2fffc0000000000() [ 23.607114] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 23.615047] raw: ffffea000700f2e0 ffffea00070022a0 0000000000000000 0000000000000000 [ 23.622941] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 23.630049] ------------[ cut here ]------------ [ 23.634779] kernel BUG at ./include/linux/mm.h:844! [ 23.639807] invalid opcode: 0000 [#1] SMP KASAN [ 23.644453] Dumping ftrace buffer: [ 23.647958] (ftrace buffer empty) [ 23.651642] Modules linked in: [ 23.654813] CPU: 0 PID: 3499 Comm: syzkaller533960 Not tainted 4.15.0-rc6+ #250 [ 23.662222] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.671555] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 23.676535] RSP: 0018:ffff8801bfc6f510 EFLAGS: 00010203 [ 23.681867] RAX: 0000000000000000 RBX: 1ffff10037f8dea4 RCX: 0000000000000000 [ 23.689108] RDX: 0000000000000000 RSI: 1ffff10037f8ddee RDI: ffffed0037f8de90 [ 23.696348] RBP: ffff8801bfc6f5e8 R08: 1ffff10037f8ddb0 R09: 0000000000000000 [ 23.703584] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10037f8dea8 [ 23.710823] R13: dffffc0000000000 R14: ffff8801bfc6f840 R15: ffffea0007000dc0 [ 23.718066] FS: 00007faa71046700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 23.726263] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.732116] CR2: 000056044044f480 CR3: 00000001c0797005 CR4: 00000000001606f0 [ 23.739356] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.746595] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.753832] Call Trace: [ 23.756400] ? mon_alloc_buff+0x1a0/0x1a0 [ 23.760515] ? find_held_lock+0x35/0x1d0 [ 23.764553] __do_fault+0xeb/0x30f [ 23.768067] ? vma_gap_callbacks_rotate+0x62/0x80 [ 23.772877] ? pte_offset_kernel+0xc7/0xc7 [ 23.777084] ? print_irqtrace_events+0x270/0x270 [ 23.781805] ? rb_insert_color_cached+0x1660/0x1660 [ 23.786791] ? vma_compute_subtree_gap+0x200/0x200 [ 23.791693] ? check_noncircular+0x20/0x20 [ 23.795910] __handle_mm_fault+0x1d8f/0x3ce0 [ 23.800297] ? __pmd_alloc+0x4e0/0x4e0 [ 23.804162] ? __save_stack_trace+0x7e/0xd0 [ 23.808454] ? find_held_lock+0x35/0x1d0 [ 23.812486] ? handle_mm_fault+0x248/0x8d0 [ 23.816686] ? lock_downgrade+0x980/0x980 [ 23.820816] handle_mm_fault+0x334/0x8d0 [ 23.824843] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 23.829408] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.835274] ? find_vma+0x30/0x150 [ 23.838803] __get_user_pages+0x50c/0x15f0 [ 23.843047] ? follow_page_mask+0x17f0/0x17f0 [ 23.847521] ? lock_acquire+0x1d5/0x580 [ 23.851461] ? lock_acquire+0x1d5/0x580 [ 23.855407] ? __mm_populate+0x2c7/0x450 [ 23.859443] ? lock_release+0xa40/0xa40 [ 23.863390] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.869244] ? rcu_note_context_switch+0x710/0x710 [ 23.874143] populate_vma_page_range+0x20e/0x2f0 [ 23.878870] ? get_user_pages+0xc0/0xc0 [ 23.882816] ? vmacache_find+0x5f/0x280 [ 23.886768] ? vmacache_update+0xfe/0x130 [ 23.890882] ? find_vma+0x30/0x150 [ 23.894390] __mm_populate+0x23a/0x450 [ 23.898246] ? populate_vma_page_range+0x2f0/0x2f0 [ 23.903141] ? down_read_killable+0x180/0x180 [ 23.907603] ? security_mmap_file+0x143/0x180 [ 23.912071] vm_mmap_pgoff+0x241/0x280 [ 23.915927] ? vma_is_stack_for_current+0xa0/0xa0 [ 23.920749] ? putname+0xee/0x130 [ 23.924177] ? rcu_read_lock_sched_held+0x108/0x120 [ 23.929161] ? kmem_cache_free+0x267/0x2a0 [ 23.933376] SyS_mmap_pgoff+0x462/0x5f0 [ 23.937321] ? find_mergeable_anon_vma+0xd0/0xd0 [ 23.942046] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.947049] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 23.951779] SyS_mmap+0x16/0x20 [ 23.955031] entry_SYSCALL_64_fastpath+0x23/0x9a [ 23.959759] RIP: 0033:0x449269 [ 23.962923] RSP: 002b:00007faa71045d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 23.970616] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449269 [ 23.977856] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 23.985101] RBP: 00000000006dac20 R08: 0000000000000009 R09: 0000000000000000 [ 23.992338] R10: 0000000000008011 R11: 0000000000000212 R12: 0030656c69662f2e [ 23.999577] R13: 6273752f7665642f R14: 00303636396f7369 R15: 0000000000000005 [ 24.006841] 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 fb a3 94 fd 48 c7 c6 a0 b1 12 86 4c 89 ff e8 8c 8c bd fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 d7 a3 94 fd [ 24.025929] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801bfc6f510 [ 24.032466] ---[ end trace 4a5583a075510c5f ]--- [ 24.037455] Kernel panic - not syncing: Fatal exception [ 24.043225] Dumping ftrace buffer: [ 24.046745] (ftrace buffer empty) [ 24.050422] Kernel Offset: disabled [ 24.054015] Rebooting in 86400 seconds..