[....] Starting enhanced syslogd: rsyslogd[ 10.139713] audit: type=1400 audit(1514342309.064:5): 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 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: [ 12.834478] audit: type=1400 audit(1514342311.759:6): avc: denied { map } for pid=3124 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 'ci-upstream-next-kasan-gce-3,10.128.0.119' (ECDSA) to the list of known hosts. executing program executing program executing program [ 18.962943] audit: type=1400 audit(1514342317.887:7): avc: denied { map } for pid=3138 comm="syzkaller958656" path="/root/syzkaller958656167" 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 [ 18.988899] audit: type=1400 audit(1514342317.912:8): avc: denied { map } for pid=3138 comm="syzkaller958656" path="/dev/usbmon0" dev="devtmpfs" ino=8874 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 [ 19.019884] page:000000003784106e count:0 mapcount:0 mapping: (null) index:0x0 [ 19.028125] flags: 0x2fffc0000000000() [ 19.032039] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 19.039979] raw: ffff8801db22ff60 ffffea0007243460 0000000000000000 0000000000000000 [ 19.047864] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 19.054950] ------------[ cut here ]------------ [ 19.059676] kernel BUG at ./include/linux/mm.h:844! [ 19.064692] invalid opcode: 0000 [#1] SMP KASAN [ 19.069336] Dumping ftrace buffer: [ 19.072840] (ftrace buffer empty) [ 19.076520] Modules linked in: [ 19.079682] CPU: 1 PID: 3139 Comm: syzkaller958656 Not tainted 4.15.0-rc4-next-20171221+ #78 [ 19.088221] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 19.097548] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 19.102539] RSP: 0018:ffff8801c898f510 EFLAGS: 00010203 [ 19.107867] RAX: 0000000000000000 RBX: 1ffff10039131ea4 RCX: 0000000000000000 [ 19.115513] RDX: 0000000000000000 RSI: 1ffff10039131dee RDI: ffffed0039131e90 [ 19.122751] RBP: ffff8801c898f5e8 R08: 1ffff10039131db0 R09: 0000000000000000 [ 19.129987] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10039131ea8 [ 19.137225] R13: dffffc0000000000 R14: ffff8801c898f840 R15: ffffea0007568dc0 [ 19.144464] FS: 00007f6e2c281700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 19.152656] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 19.158504] CR2: 0000556c7c0e9078 CR3: 00000001ccf84005 CR4: 00000000001606e0 [ 19.165745] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 19.172982] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 19.180218] Call Trace: [ 19.182786] ? mon_alloc_buff+0x1a0/0x1a0 [ 19.186903] ? find_held_lock+0x35/0x1d0 [ 19.190940] __do_fault+0xeb/0x30f [ 19.194449] ? vma_gap_callbacks_rotate+0x62/0x80 [ 19.199261] ? pte_offset_kernel+0xc7/0xc7 [ 19.203463] ? print_irqtrace_events+0x270/0x270 [ 19.208186] ? rb_insert_color_cached+0x1660/0x1660 [ 19.213172] ? vma_compute_subtree_gap+0x200/0x200 [ 19.218067] ? rb_insert_color_cached+0x1660/0x1660 [ 19.223050] ? check_noncircular+0x20/0x20 [ 19.227255] __handle_mm_fault+0x1d8f/0x3ce0 [ 19.231640] ? __pmd_alloc+0x4e0/0x4e0 [ 19.235497] ? find_held_lock+0x35/0x1d0 [ 19.239530] ? handle_mm_fault+0x2a0/0x930 [ 19.243733] ? lock_downgrade+0x980/0x980 [ 19.247858] handle_mm_fault+0x38f/0x930 [ 19.251888] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 19.256438] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 19.262289] ? find_vma+0x30/0x150 [ 19.265799] __get_user_pages+0x50c/0x15f0 [ 19.270008] ? follow_page_mask+0x17f0/0x17f0 [ 19.274493] ? vma_link+0xe9/0x170 [ 19.278002] ? lock_acquire+0x1d5/0x580 [ 19.281951] ? lock_acquire+0x1d5/0x580 [ 19.285893] ? __mm_populate+0x2c7/0x450 [ 19.289925] ? lock_release+0xa40/0xa40 [ 19.293874] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 19.299731] ? rcu_note_context_switch+0x710/0x710 [ 19.304634] populate_vma_page_range+0x20e/0x2f0 [ 19.309361] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 19.314257] ? vmacache_find+0x5f/0x280 [ 19.318196] ? vmacache_update+0xfe/0x130 [ 19.322313] ? find_vma+0x30/0x150 [ 19.325835] __mm_populate+0x23a/0x450 [ 19.329695] ? populate_vma_page_range+0x2f0/0x2f0 [ 19.334590] ? down_read_killable+0x180/0x180 [ 19.339062] ? security_mmap_file+0x143/0x180 [ 19.343538] vm_mmap_pgoff+0x241/0x280 [ 19.347396] ? vma_is_stack_for_current+0xa0/0xa0 [ 19.352213] ? putname+0xee/0x130 [ 19.355724] ? rcu_read_lock_sched_held+0x108/0x120 [ 19.360708] ? kmem_cache_free+0x267/0x2a0 [ 19.364915] SyS_mmap_pgoff+0x462/0x5f0 [ 19.368859] ? find_mergeable_anon_vma+0xd0/0xd0 [ 19.373589] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 19.378576] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 19.383300] SyS_mmap+0x16/0x20 [ 19.386547] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 19.391268] RIP: 0033:0x449249 [ 19.394423] RSP: 002b:00007f6e2c280d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 19.402097] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449249 [ 19.409333] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 19.416569] RBP: 0000000000000000 R08: 000000000000000a R09: 0000000000000000 [ 19.423806] R10: 0000000000008011 R11: 0000000000000212 R12: 00000000006dac20 [ 19.431046] R13: 6273752f7665642f R14: 00007f6e2c2819c0 R15: 0000000000000005 [ 19.438290] 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 [ 19.457356] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c898f510 [ 19.463846] ---[ end trace fcce019c20ec4f56 ]--- [ 19.468588] Kernel panic - not syncing: Fatal exception [ 19.474288] Dumping ftrace buffer: [ 19.477799] (ftrace buffer empty) [ 19.481478] Kernel Offset: disabled [ 19.485073] Rebooting in 86400 seconds..