[....] Starting enhanced syslogd: rsyslogd[ 11.917781] audit: type=1400 audit(1515546298.436:5): avc: denied { syslog } for pid=3325 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: [ 17.775734] audit: type=1400 audit(1515546304.294:6): avc: denied { map } for pid=3465 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 '10.128.15.206' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program [ 23.992343] audit: type=1400 audit(1515546310.511:7): avc: denied { map } for pid=3479 comm="syzkaller640626" path="/root/syzkaller640626741" 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 [ 24.018494] audit: type=1400 audit(1515546310.515:8): avc: denied { map } for pid=3479 comm="syzkaller640626" path="/dev/usbmon0" dev="devtmpfs" ino=8864 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 [ 24.056415] page:ffffea000727dc00 count:0 mapcount:0 mapping: (null) index:0x0 [ 24.064701] flags: 0x2fffc0000000000() [ 24.068649] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 24.076573] raw: ffffea0006fe33e0 ffffea00070022e0 0000000000000000 0000000000000000 [ 24.084460] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 24.091548] ------------[ cut here ]------------ [ 24.096394] kernel BUG at ./include/linux/mm.h:844! [ 24.101427] invalid opcode: 0000 [#1] SMP KASAN [ 24.106073] Dumping ftrace buffer: [ 24.109576] (ftrace buffer empty) [ 24.113253] Modules linked in: [ 24.116913] CPU: 0 PID: 3480 Comm: syzkaller640626 Not tainted 4.15.0-rc7+ #255 [ 24.124322] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.133650] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 24.138639] RSP: 0018:ffff8801bf82f510 EFLAGS: 00010203 [ 24.144086] RAX: 0000000000000000 RBX: 1ffff10037f05ea4 RCX: 0000000000000000 [ 24.151321] RDX: 0000000000000000 RSI: 1ffff10037f05dee RDI: ffffed0037f05e90 [ 24.158558] RBP: ffff8801bf82f5e8 R08: 1ffff10037f05db0 R09: 0000000000000000 [ 24.165794] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10037f05ea8 [ 24.173030] R13: dffffc0000000000 R14: ffff8801bf82f840 R15: ffffea000727dc00 [ 24.180269] FS: 00007fd2acb11700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 24.188471] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.194317] CR2: 00000000208be000 CR3: 00000001c02fb006 CR4: 00000000001606f0 [ 24.201565] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.208802] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.216042] Call Trace: [ 24.218599] ? mon_alloc_buff+0x1a0/0x1a0 [ 24.222718] ? find_held_lock+0x35/0x1d0 [ 24.226753] __do_fault+0xeb/0x30f [ 24.230260] ? vma_gap_callbacks_rotate+0x62/0x80 [ 24.235069] ? pte_offset_kernel+0xc7/0xc7 [ 24.239267] ? print_irqtrace_events+0x270/0x270 [ 24.244124] ? rb_insert_color_cached+0x1660/0x1660 [ 24.249108] ? vma_compute_subtree_gap+0x200/0x200 [ 24.254005] ? check_noncircular+0x20/0x20 [ 24.258213] __handle_mm_fault+0x1d8f/0x3ce0 [ 24.262593] ? __pmd_alloc+0x4e0/0x4e0 [ 24.266446] ? __save_stack_trace+0x7e/0xd0 [ 24.270736] ? find_held_lock+0x35/0x1d0 [ 24.274764] ? handle_mm_fault+0x248/0x8d0 [ 24.278966] ? lock_downgrade+0x980/0x980 [ 24.283094] handle_mm_fault+0x334/0x8d0 [ 24.287122] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 24.291670] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 24.297519] ? find_vma+0x30/0x150 [ 24.301042] __get_user_pages+0x50c/0x15f0 [ 24.305254] ? follow_page_mask+0x17f0/0x17f0 [ 24.309719] ? lock_acquire+0x1d5/0x580 [ 24.313658] ? lock_acquire+0x1d5/0x580 [ 24.317596] ? __mm_populate+0x2c7/0x450 [ 24.321638] ? lock_release+0xa40/0xa40 [ 24.325578] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 24.331429] ? rcu_note_context_switch+0x710/0x710 [ 24.336328] populate_vma_page_range+0x20e/0x2f0 [ 24.341053] ? get_user_pages+0xc0/0xc0 [ 24.344991] ? vmacache_find+0x5f/0x280 [ 24.348932] ? vmacache_update+0xfe/0x130 [ 24.353046] ? find_vma+0x30/0x150 [ 24.356616] __mm_populate+0x23a/0x450 [ 24.360472] ? populate_vma_page_range+0x2f0/0x2f0 [ 24.365365] ? down_read_killable+0x180/0x180 [ 24.369826] ? security_mmap_file+0x143/0x180 [ 24.374290] vm_mmap_pgoff+0x241/0x280 [ 24.378303] ? vma_is_stack_for_current+0xa0/0xa0 [ 24.383123] SyS_mmap_pgoff+0x462/0x5f0 [ 24.387067] ? find_mergeable_anon_vma+0xd0/0xd0 [ 24.391846] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.396828] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 24.401563] SyS_mmap+0x16/0x20 [ 24.404810] entry_SYSCALL_64_fastpath+0x23/0x9a [ 24.409540] RIP: 0033:0x449799 [ 24.412695] RSP: 002b:00007fd2acb10cd8 EFLAGS: 00000216 ORIG_RAX: 0000000000000009 [ 24.420366] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449799 [ 24.427601] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 24.434837] RBP: 00000000006dac20 R08: 000000000000000e R09: 0000000000000000 [ 24.442072] R10: 0000000000008011 R11: 0000000000000216 R12: 0000000000000000 [ 24.449308] R13: 00007ffcf7976e0f R14: 00007fd2acb119c0 R15: 0000000000000007 [ 24.456551] 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 [ 24.475617] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801bf82f510 [ 24.482139] ---[ end trace 42cec4bcfb1ec443 ]--- [ 24.486894] Kernel panic - not syncing: Fatal exception [ 24.492662] Dumping ftrace buffer: [ 24.496168] (ftrace buffer empty) [ 24.499842] Kernel Offset: disabled [ 24.503439] Rebooting in 86400 seconds..