[....] Starting enhanced syslogd: rsyslogd[ 12.876867] audit: type=1400 audit(1515705606.740:5): avc: denied { syslog } for pid=3340 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: [ 18.261418] audit: type=1400 audit(1515705612.125:6): avc: denied { map } for pid=3481 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 '10.128.0.63' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program [ 24.468881] audit: type=1400 audit(1515705618.332:7): avc: denied { map } for pid=3495 comm="syzkaller521767" path="/root/syzkaller521767767" 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 [ 24.494841] audit: type=1400 audit(1515705618.332:8): avc: denied { map } for pid=3495 comm="syzkaller521767" path="/dev/usbmon0" dev="devtmpfs" ino=1236 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 [ 24.522789] page:ffffea0007067240 count:0 mapcount:0 mapping: (null) index:0x0 [ 24.531154] flags: 0x2fffc0000000000() [ 24.535062] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 24.542977] raw: ffffea00070218e0 ffffea0007040ae0 0000000000000000 0000000000000000 [ 24.550977] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 24.558140] ------------[ cut here ]------------ [ 24.562871] kernel BUG at ./include/linux/mm.h:844! [ 24.567915] invalid opcode: 0000 [#1] SMP KASAN [ 24.572555] Dumping ftrace buffer: [ 24.576062] (ftrace buffer empty) [ 24.579740] Modules linked in: [ 24.582911] CPU: 0 PID: 3496 Comm: syzkaller521767 Not tainted 4.15.0-rc7+ #257 [ 24.590325] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.599654] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 24.604632] RSP: 0018:ffff8801c08f7510 EFLAGS: 00010203 [ 24.610047] RAX: 0000000000000000 RBX: 1ffff1003811eea4 RCX: 0000000000000000 [ 24.617282] RDX: 0000000000000000 RSI: 1ffff1003811edee RDI: ffffed003811ee90 [ 24.624521] RBP: ffff8801c08f75e8 R08: 1ffff1003811edb0 R09: 0000000000000000 [ 24.631758] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff1003811eea8 [ 24.638994] R13: dffffc0000000000 R14: ffff8801c08f7840 R15: ffffea0007067240 [ 24.646242] FS: 00007fa910b01700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 24.654448] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.660298] CR2: 00000000208be000 CR3: 00000001c08a1003 CR4: 00000000001606f0 [ 24.667535] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.674771] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.682007] Call Trace: [ 24.684567] ? mon_alloc_buff+0x1a0/0x1a0 [ 24.688683] ? find_held_lock+0x35/0x1d0 [ 24.692726] __do_fault+0xeb/0x30f [ 24.696246] ? vma_gap_callbacks_rotate+0x62/0x80 [ 24.701069] ? pte_offset_kernel+0xc7/0xc7 [ 24.705270] ? print_irqtrace_events+0x270/0x270 [ 24.709993] ? rb_insert_color_cached+0x1660/0x1660 [ 24.714983] ? vma_compute_subtree_gap+0x200/0x200 [ 24.719879] ? check_noncircular+0x20/0x20 [ 24.724084] __handle_mm_fault+0x1d8f/0x3ce0 [ 24.728461] ? __pmd_alloc+0x4e0/0x4e0 [ 24.732315] ? __save_stack_trace+0x7e/0xd0 [ 24.736604] ? find_held_lock+0x35/0x1d0 [ 24.740634] ? handle_mm_fault+0x248/0x8d0 [ 24.744844] ? lock_downgrade+0x980/0x980 [ 24.748967] handle_mm_fault+0x334/0x8d0 [ 24.752995] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 24.757542] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 24.763392] ? find_vma+0x30/0x150 [ 24.766903] __get_user_pages+0x50c/0x15f0 [ 24.771109] ? follow_page_mask+0x17f0/0x17f0 [ 24.775572] ? lock_acquire+0x1d5/0x580 [ 24.779519] ? lock_acquire+0x1d5/0x580 [ 24.783457] ? __mm_populate+0x2c7/0x450 [ 24.787488] ? lock_release+0xa40/0xa40 [ 24.791428] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 24.797288] ? rcu_note_context_switch+0x710/0x710 [ 24.802187] populate_vma_page_range+0x20e/0x2f0 [ 24.806912] ? get_user_pages+0xc0/0xc0 [ 24.810853] ? vmacache_find+0x5f/0x280 [ 24.814793] ? vmacache_update+0xfe/0x130 [ 24.818907] ? find_vma+0x30/0x150 [ 24.822418] __mm_populate+0x23a/0x450 [ 24.826281] ? populate_vma_page_range+0x2f0/0x2f0 [ 24.831178] ? down_read_killable+0x180/0x180 [ 24.835898] ? security_mmap_file+0x143/0x180 [ 24.840364] vm_mmap_pgoff+0x241/0x280 [ 24.844227] ? vma_is_stack_for_current+0xa0/0xa0 [ 24.849040] ? putname+0xee/0x130 [ 24.852458] ? rcu_read_lock_sched_held+0x108/0x120 [ 24.857439] ? kmem_cache_free+0x267/0x2a0 [ 24.861654] SyS_mmap_pgoff+0x462/0x5f0 [ 24.865597] ? find_mergeable_anon_vma+0xd0/0xd0 [ 24.870319] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.875310] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 24.880036] SyS_mmap+0x16/0x20 [ 24.883282] entry_SYSCALL_64_fastpath+0x23/0x9a [ 24.888004] RIP: 0033:0x4492b9 [ 24.891158] RSP: 002b:00007fa910b00d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 24.898832] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 00000000004492b9 [ 24.906070] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 24.913314] RBP: 0000000000000000 R08: 000000000000000b R09: 0000000000000000 [ 24.920551] R10: 0000000000008011 R11: 0000000000000212 R12: 00000000006dac20 [ 24.927788] R13: 7475612f7665642f R14: 6273752f7665642f R15: 0000000000000007 [ 24.935036] 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 cb 9c 94 fd 48 c7 c6 a0 b1 12 86 4c 89 ff e8 dc 89 bd fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 a7 9c 94 fd [ 24.954117] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c08f7510 [ 24.960661] ---[ end trace 3683202e6b56f8ad ]--- [ 24.965655] Kernel panic - not syncing: Fatal exception [ 24.971691] Dumping ftrace buffer: [ 24.975212] (ftrace buffer empty) [ 24.978888] Kernel Offset: disabled [ 24.982479] Rebooting in 86400 seconds..