[....] Starting enhanced syslogd: rsyslogd[ 12.417078] audit: type=1400 audit(1514765003.952:5): 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 OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 18.700992] audit: type=1400 audit(1514765010.236:6): 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 '10.128.15.237' (ECDSA) to the list of known hosts. executing program executing program [ 24.878730] audit: type=1400 audit(1514765016.414:7): avc: denied { map } for pid=3495 comm="syzkaller921809" path="/root/syzkaller921809017" 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 [ 24.905317] audit: type=1400 audit(1514765016.433:8): avc: denied { map } for pid=3495 comm="syzkaller921809" path="/dev/usbmon0" dev="devtmpfs" ino=8875 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 [ 24.938498] page:0000000083fe4bcc count:0 mapcount:0 mapping: (null) index:0x0 [ 24.948228] flags: 0x2fffc0000000000() [ 24.952165] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 24.960145] raw: ffffea000700fd60 ffffea000702f020 0000000000000000 0000000000000000 [ 24.968050] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 24.975214] ------------[ cut here ]------------ [ 24.979941] kernel BUG at ./include/linux/mm.h:844! [ 24.984979] invalid opcode: 0000 [#1] SMP KASAN [ 24.989616] Dumping ftrace buffer: [ 24.993124] (ftrace buffer empty) [ 24.996808] Modules linked in: [ 24.999970] CPU: 1 PID: 3499 Comm: syzkaller921809 Not tainted 4.15.0-rc5+ #154 [ 25.007382] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.016709] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 25.021693] RSP: 0018:ffff8801bffb7388 EFLAGS: 00010203 [ 25.027021] RAX: 0000000000000000 RBX: 1ffff10037ff6e73 RCX: 0000000000000000 [ 25.034270] RDX: 0000000000000000 RSI: 1ffff10037ff6dbd RDI: ffffed0037ff6e60 [ 25.041507] RBP: ffff8801bffb7460 R08: 1ffff10037ff6d7f R09: 0000000000000000 [ 25.048744] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10037ff6e77 [ 25.055981] R13: dffffc0000000000 R14: ffff8801bffb76b8 R15: ffffea000702f040 [ 25.063217] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f7fc3b40 [ 25.071411] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 25.077263] CR2: 00007ffe321eef88 CR3: 00000001c0d7c001 CR4: 00000000001606e0 [ 25.084502] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.091737] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.098975] Call Trace: [ 25.101531] ? mon_alloc_buff+0x1a0/0x1a0 [ 25.105646] ? find_held_lock+0x35/0x1d0 [ 25.109681] __do_fault+0xeb/0x30f [ 25.113189] ? pte_offset_kernel+0xc7/0xc7 [ 25.117392] ? rb_insert_color_cached+0x1660/0x1660 [ 25.122378] ? rcutorture_record_progress+0x10/0x10 [ 25.127366] ? check_noncircular+0x20/0x20 [ 25.131568] __handle_mm_fault+0x1d8f/0x3ce0 [ 25.135945] ? __pmd_alloc+0x4e0/0x4e0 [ 25.139799] ? __save_stack_trace+0x7e/0xd0 [ 25.144096] ? find_held_lock+0x35/0x1d0 [ 25.148125] ? handle_mm_fault+0x248/0x8d0 [ 25.152337] ? lock_downgrade+0x980/0x980 [ 25.156460] handle_mm_fault+0x334/0x8d0 [ 25.160489] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 25.165035] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.170884] ? find_vma+0x30/0x150 [ 25.174400] __get_user_pages+0x50c/0x15f0 [ 25.178606] ? follow_page_mask+0x17f0/0x17f0 [ 25.183071] ? lock_acquire+0x1d5/0x580 [ 25.187008] ? lock_acquire+0x1d5/0x580 [ 25.190947] ? __mm_populate+0x2c7/0x450 [ 25.194984] ? lock_release+0xa40/0xa40 [ 25.198931] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.204782] ? rcu_note_context_switch+0x710/0x710 [ 25.209689] populate_vma_page_range+0x20e/0x2f0 [ 25.214418] ? get_user_pages+0xc0/0xc0 [ 25.218364] ? vmacache_find+0x5f/0x280 [ 25.222307] ? vmacache_update+0xfe/0x130 [ 25.226422] ? find_vma+0x30/0x150 [ 25.229929] __mm_populate+0x23a/0x450 [ 25.233785] ? populate_vma_page_range+0x2f0/0x2f0 [ 25.238679] ? down_read_killable+0x180/0x180 [ 25.243142] ? security_mmap_file+0x143/0x180 [ 25.247607] vm_mmap_pgoff+0x241/0x280 [ 25.251464] ? vma_is_stack_for_current+0xa0/0xa0 [ 25.256280] ? __fdget_raw+0x20/0x20 [ 25.259960] ? memset+0x31/0x40 [ 25.263220] SyS_mmap_pgoff+0x462/0x5f0 [ 25.267168] ? find_mergeable_anon_vma+0xd0/0xd0 [ 25.271895] ? do_fast_syscall_32+0x156/0xf9d [ 25.276359] ? find_mergeable_anon_vma+0xd0/0xd0 [ 25.281081] do_fast_syscall_32+0x3ee/0xf9d [ 25.285373] ? do_int80_syscall_32+0x9d0/0x9d0 [ 25.289926] ? syscall_return_slowpath+0x2ad/0x550 [ 25.294826] ? prepare_exit_to_usermode+0x340/0x340 [ 25.299808] ? sysret32_from_system_call+0x5/0x3b [ 25.304616] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.309429] entry_SYSENTER_compat+0x54/0x63 [ 25.313804] RIP: 0023:0xf7fe8c79 [ 25.317136] RSP: 002b:00000000f7fc31ec EFLAGS: 00000292 ORIG_RAX: 00000000000000c0 [ 25.324817] RAX: ffffffffffffffda RBX: 0000000020ac6000 RCX: 0000000000004000 [ 25.332060] RDX: 0000000001000004 RSI: 0000000000008011 RDI: 0000000000000009 [ 25.339301] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 25.346544] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 25.353780] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 25.361023] 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 e0 af 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 [ 25.380123] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801bffb7388 [ 25.386645] ---[ end trace c970cd3f9e3ff466 ]--- [ 25.391560] Kernel panic - not syncing: Fatal exception [ 25.396933] Dumping ftrace buffer: [ 25.400445] (ftrace buffer empty) [ 25.404125] Kernel Offset: disabled [ 25.407718] Rebooting in 86400 seconds..