[....] Starting enhanced syslogd: rsyslogd[ 10.640164] audit: type=1400 audit(1514895259.440:5): avc: denied { syslog } for pid=2994 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: [ 16.998354] audit: type=1400 audit(1514895265.799:6): avc: denied { map } for pid=3134 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 '10.128.0.5' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program [ 23.223599] audit: type=1400 audit(1514895272.024:7): avc: denied { map } for pid=3148 comm="syzkaller546484" path="/root/syzkaller546484051" 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 executing program executing program executing program executing program [ 23.249617] audit: type=1400 audit(1514895272.024:8): avc: denied { map } for pid=3148 comm="syzkaller546484" path="/dev/usbmon0" dev="devtmpfs" ino=8946 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 executing program [ 23.324172] page:ffffea000726fc80 count:0 mapcount:0 mapping: (null) index:0x0 [ 23.332471] flags: 0x2fffc0000000000() [ 23.336396] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 23.344301] raw: ffffea0006f21ba0 ffffea000727fe60 0000000000000000 0000000000000000 [ 23.352215] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 23.359329] ------------[ cut here ]------------ [ 23.364065] kernel BUG at ./include/linux/mm.h:844! [ 23.369107] invalid opcode: 0000 [#1] SMP KASAN [ 23.373761] Dumping ftrace buffer: [ 23.377286] (ftrace buffer empty) [ 23.380965] Modules linked in: [ 23.384128] CPU: 0 PID: 3149 Comm: syzkaller546484 Not tainted 4.15.0-rc4-mm1+ #49 [ 23.391808] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.401148] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 23.406127] RSP: 0018:ffff8801c81a7510 EFLAGS: 00010203 [ 23.411456] RAX: 0000000000000000 RBX: 1ffff10039034ea4 RCX: 0000000000000000 [ 23.418693] RDX: 0000000000000000 RSI: 1ffff10039034dee RDI: ffffed0039034e90 [ 23.425932] RBP: ffff8801c81a75e8 R08: 1ffff10039034db0 R09: 0000000000000000 [ 23.433169] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10039034ea8 [ 23.440415] R13: dffffc0000000000 R14: ffff8801c81a7840 R15: ffffea000726fc80 [ 23.447659] FS: 00007fa0bc420700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 23.455852] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.461700] CR2: 0000000020f17ff7 CR3: 00000001c8afd004 CR4: 00000000001606f0 [ 23.468942] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.476176] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.483411] Call Trace: [ 23.485972] ? mon_alloc_buff+0x1a0/0x1a0 [ 23.490086] ? find_held_lock+0x35/0x1d0 [ 23.494124] __do_fault+0xeb/0x30f [ 23.497630] ? vma_gap_callbacks_rotate+0x62/0x80 [ 23.502440] ? pte_offset_kernel+0xc7/0xc7 [ 23.506646] ? print_irqtrace_events+0x270/0x270 [ 23.511367] ? rb_insert_color_cached+0x1660/0x1660 [ 23.516348] ? vma_compute_subtree_gap+0x200/0x200 [ 23.521242] ? rb_insert_color_cached+0x1660/0x1660 [ 23.526224] ? check_noncircular+0x20/0x20 [ 23.530427] __handle_mm_fault+0x1d8f/0x3ce0 [ 23.534806] ? __pmd_alloc+0x4e0/0x4e0 [ 23.538674] ? find_held_lock+0x35/0x1d0 [ 23.542704] ? handle_mm_fault+0x2a0/0x930 [ 23.546906] ? lock_downgrade+0x980/0x980 [ 23.551032] handle_mm_fault+0x38f/0x930 [ 23.555079] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 23.559627] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.565480] ? find_vma+0x30/0x150 [ 23.568989] __get_user_pages+0x50c/0x15f0 [ 23.573196] ? follow_page_mask+0x17f0/0x17f0 [ 23.577663] ? vma_link+0xe9/0x170 [ 23.581173] ? lock_acquire+0x1d5/0x580 [ 23.585112] ? lock_acquire+0x1d5/0x580 [ 23.589053] ? __mm_populate+0x2c7/0x450 [ 23.593084] ? lock_release+0xa40/0xa40 [ 23.597023] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.602877] ? rcu_note_context_switch+0x710/0x710 [ 23.607790] populate_vma_page_range+0x20e/0x2f0 [ 23.612519] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 23.617419] ? vmacache_find+0x5f/0x280 [ 23.621372] ? vmacache_update+0xfe/0x130 [ 23.625492] ? find_vma+0x30/0x150 [ 23.629002] __mm_populate+0x23a/0x450 [ 23.632860] ? populate_vma_page_range+0x2f0/0x2f0 [ 23.637760] ? down_read_killable+0x180/0x180 [ 23.642237] ? security_mmap_file+0x143/0x180 [ 23.646719] vm_mmap_pgoff+0x241/0x280 [ 23.650928] ? vma_is_stack_for_current+0xa0/0xa0 [ 23.655745] SyS_mmap_pgoff+0x462/0x5f0 [ 23.659690] ? find_mergeable_anon_vma+0xd0/0xd0 [ 23.664412] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.669398] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 23.674124] SyS_mmap+0x16/0x20 [ 23.677373] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 23.682095] RIP: 0033:0x4498c9 [ 23.685251] RSP: 002b:00007fa0bc41fcd8 EFLAGS: 00000216 ORIG_RAX: 0000000000000009 [ 23.692926] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 00000000004498c9 [ 23.700170] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 23.707408] RBP: 00000000006dac20 R08: 0000000000000032 R09: 0000000000000000 [ 23.714650] R10: 0000000000008011 R11: 0000000000000216 R12: 0000000000000000 [ 23.721906] R13: 00007fffd1310a4f R14: 00007fa0bc4209c0 R15: 0000000000000009 [ 23.729153] 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 db e1 96 fd 48 c7 c6 80 1f d1 85 4c 89 ff e8 6c a3 c0 fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 b7 e1 96 fd [ 23.748230] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c81a7510 [ 23.754780] ---[ end trace 603e9f0564143371 ]--- [ 23.759687] Kernel panic - not syncing: Fatal exception [ 23.765388] Dumping ftrace buffer: [ 23.768915] (ftrace buffer empty) [ 23.772594] Kernel Offset: disabled [ 23.776188] Rebooting in 86400 seconds..