[....] Starting enhanced syslogd: rsyslogd[ 12.561912] audit: type=1400 audit(1514854479.118:5): avc: denied { syslog } for pid=3342 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: [ 19.527920] audit: type=1400 audit(1514854486.084:6): 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 '10.128.15.216' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program [ 25.747668] audit: type=1400 audit(1514854492.304:7): avc: denied { map } for pid=3498 comm="syzkaller439935" path="/root/syzkaller439935916" 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 [ 25.774484] audit: type=1400 audit(1514854492.304:8): avc: denied { map } for pid=3498 comm="syzkaller439935" path="/dev/usbmon0" dev="devtmpfs" ino=1115 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 [ 25.808201] page:0000000065501860 count:0 mapcount:0 mapping: (null) index:0x0 [ 25.816463] flags: 0x2fffc0000000000() [ 25.820361] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 25.828399] raw: ffffea0006fa82a0 ffffea0007310020 0000000000000000 0000000000000000 [ 25.836325] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 25.843443] ------------[ cut here ]------------ [ 25.848170] kernel BUG at ./include/linux/mm.h:844! [ 25.853231] invalid opcode: 0000 [#1] SMP KASAN [ 25.857870] Dumping ftrace buffer: [ 25.861380] (ftrace buffer empty) [ 25.865057] Modules linked in: [ 25.868220] CPU: 1 PID: 3499 Comm: syzkaller439935 Not tainted 4.15.0-rc6+ #155 [ 25.875630] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.884963] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 25.889945] RSP: 0018:ffff8801be407388 EFLAGS: 00010203 [ 25.895274] RAX: 0000000000000000 RBX: 1ffff10037c80e73 RCX: 0000000000000000 [ 25.902514] RDX: 0000000000000000 RSI: 1ffff10037c80dbd RDI: ffffed0037c80e60 [ 25.909758] RBP: ffff8801be407460 R08: 1ffff10037c80d7f R09: 0000000000000000 [ 25.916996] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10037c80e77 [ 25.924238] R13: dffffc0000000000 R14: ffff8801be4076b8 R15: ffffea0006fab7c0 [ 25.931477] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f7f24b40 [ 25.939668] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 25.945514] CR2: 0000000020000ffd CR3: 00000001beddf006 CR4: 00000000001606e0 [ 25.952760] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.959998] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.967236] Call Trace: [ 25.969803] ? mon_alloc_buff+0x1a0/0x1a0 [ 25.973922] ? find_held_lock+0x35/0x1d0 [ 25.977959] __do_fault+0xeb/0x30f [ 25.981467] ? pte_offset_kernel+0xc7/0xc7 [ 25.985670] ? rb_insert_color_cached+0x1660/0x1660 [ 25.990660] ? rcutorture_record_progress+0x10/0x10 [ 25.995655] ? check_noncircular+0x20/0x20 [ 25.999866] __handle_mm_fault+0x1d8f/0x3ce0 [ 26.004243] ? __pmd_alloc+0x4e0/0x4e0 [ 26.008099] ? __save_stack_trace+0x7e/0xd0 [ 26.012389] ? find_held_lock+0x35/0x1d0 [ 26.016421] ? handle_mm_fault+0x248/0x8d0 [ 26.020623] ? lock_downgrade+0x980/0x980 [ 26.024748] handle_mm_fault+0x334/0x8d0 [ 26.028776] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 26.033325] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 26.039176] ? find_vma+0x30/0x150 [ 26.042685] __get_user_pages+0x50c/0x15f0 [ 26.046893] ? follow_page_mask+0x17f0/0x17f0 [ 26.051360] ? lock_acquire+0x1d5/0x580 [ 26.055298] ? lock_acquire+0x1d5/0x580 [ 26.059238] ? __mm_populate+0x2c7/0x450 [ 26.063268] ? lock_release+0xa40/0xa40 [ 26.067214] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 26.073067] ? rcu_note_context_switch+0x710/0x710 [ 26.077973] populate_vma_page_range+0x20e/0x2f0 [ 26.082700] ? get_user_pages+0xc0/0xc0 [ 26.086648] ? vmacache_find+0x5f/0x280 [ 26.090588] ? vmacache_update+0xfe/0x130 [ 26.094705] ? find_vma+0x30/0x150 [ 26.098211] __mm_populate+0x23a/0x450 [ 26.102066] ? populate_vma_page_range+0x2f0/0x2f0 [ 26.106966] ? down_read_killable+0x180/0x180 [ 26.111430] ? security_mmap_file+0x143/0x180 [ 26.115898] vm_mmap_pgoff+0x241/0x280 [ 26.119767] ? vma_is_stack_for_current+0xa0/0xa0 [ 26.124585] ? mon_bin_compat_ioctl+0x1a2/0x4e0 [ 26.129220] ? kmem_cache_free+0x267/0x2a0 [ 26.133432] SyS_mmap_pgoff+0x462/0x5f0 [ 26.137377] ? find_mergeable_anon_vma+0xd0/0xd0 [ 26.142106] ? do_fast_syscall_32+0x156/0xf9d [ 26.146571] ? find_mergeable_anon_vma+0xd0/0xd0 [ 26.151299] do_fast_syscall_32+0x3ee/0xf9d [ 26.155590] ? do_int80_syscall_32+0x9d0/0x9d0 [ 26.160141] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 26.165647] ? syscall_return_slowpath+0x2ad/0x550 [ 26.170546] ? sysret32_from_system_call+0x5/0x3b [ 26.175358] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.180169] entry_SYSENTER_compat+0x54/0x63 [ 26.184544] RIP: 0023:0xf7f28c79 [ 26.187874] RSP: 002b:00000000f7f2411c EFLAGS: 00000296 ORIG_RAX: 00000000000000c0 [ 26.195547] RAX: ffffffffffffffda RBX: 0000000020ac6000 RCX: 0000000000004000 [ 26.202783] RDX: 0000000001000004 RSI: 0000000000008011 RDI: 0000000000000019 [ 26.210019] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 26.217258] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 26.224498] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 26.231742] 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 2b b0 94 fd 48 c7 c6 20 b1 12 86 4c 89 ff e8 bc 98 bd fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 07 b0 94 fd [ 26.250816] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801be407388 [ 26.257376] ---[ end trace 7fcff88aed6e2205 ]--- [ 26.262332] Kernel panic - not syncing: Fatal exception [ 26.268054] Dumping ftrace buffer: [ 26.271564] (ftrace buffer empty) [ 26.275243] Kernel Offset: disabled [ 26.278838] Rebooting in 86400 seconds..