[....] Starting enhanced syslogd: rsyslogd[ 11.608196] audit: type=1400 audit(1514730508.675:5): avc: denied { syslog } for pid=3336 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 file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?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: [ 17.519950] audit: type=1400 audit(1514730514.586:6): avc: denied { map } for pid=3476 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 '10.128.0.61' (ECDSA) to the list of known hosts. executing program executing program executing program executing program [ 26.692777] audit: type=1400 audit(1514730523.759:7): avc: denied { map } for pid=3490 comm="syzkaller896419" path="/root/syzkaller896419298" 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 [ 26.718825] audit: type=1400 audit(1514730523.759:8): avc: denied { map } for pid=3490 comm="syzkaller896419" path="/dev/usbmon0" dev="devtmpfs" ino=8955 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 [ 26.749472] page:0000000016eeac03 count:0 mapcount:0 mapping: (null) index:0x0 [ 26.757739] flags: 0x2fffc0000000000() [ 26.761897] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 26.769816] raw: ffffea000704ec20 ffffea000703e920 0000000000000000 0000000000000000 [ 26.777701] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 26.784798] ------------[ cut here ]------------ [ 26.789533] kernel BUG at ./include/linux/mm.h:844! [ 26.794558] invalid opcode: 0000 [#1] SMP KASAN [ 26.799203] Dumping ftrace buffer: [ 26.802708] (ftrace buffer empty) [ 26.806384] Modules linked in: [ 26.809550] CPU: 1 PID: 3491 Comm: syzkaller896419 Not tainted 4.15.0-rc5+ #154 [ 26.816957] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.826284] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 26.831262] RSP: 0018:ffff8801c09b7388 EFLAGS: 00010203 [ 26.836593] RAX: 0000000000000000 RBX: 1ffff10038136e73 RCX: 0000000000000000 [ 26.843833] RDX: 0000000000000000 RSI: 1ffff10038136dbd RDI: ffffed0038136e60 [ 26.851070] RBP: ffff8801c09b7460 R08: 1ffff10038136d7f R09: 0000000000000000 [ 26.858307] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10038136e77 [ 26.865556] R13: dffffc0000000000 R14: ffff8801c09b76b8 R15: ffffea00070212c0 [ 26.872803] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f7f24b40 [ 26.880995] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 26.886848] CR2: 00000000208be000 CR3: 00000001c0e44002 CR4: 00000000001606e0 [ 26.894085] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 26.901322] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 26.908558] Call Trace: [ 26.911120] ? mon_alloc_buff+0x1a0/0x1a0 [ 26.915233] ? find_held_lock+0x35/0x1d0 [ 26.919265] __do_fault+0xeb/0x30f [ 26.922770] ? pte_offset_kernel+0xc7/0xc7 [ 26.926970] ? rb_insert_color_cached+0x1660/0x1660 [ 26.931954] ? rcutorture_record_progress+0x10/0x10 [ 26.936935] ? check_noncircular+0x20/0x20 [ 26.941139] __handle_mm_fault+0x1d8f/0x3ce0 [ 26.945514] ? __pmd_alloc+0x4e0/0x4e0 [ 26.949368] ? __save_stack_trace+0x7e/0xd0 [ 26.953657] ? find_held_lock+0x35/0x1d0 [ 26.957685] ? handle_mm_fault+0x248/0x8d0 [ 26.961894] ? lock_downgrade+0x980/0x980 [ 26.966026] handle_mm_fault+0x334/0x8d0 [ 26.970054] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 26.974600] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 26.980448] ? find_vma+0x30/0x150 [ 26.983958] __get_user_pages+0x50c/0x15f0 [ 26.988163] ? follow_page_mask+0x17f0/0x17f0 [ 26.992626] ? lock_acquire+0x1d5/0x580 [ 26.996563] ? lock_acquire+0x1d5/0x580 [ 27.000500] ? __mm_populate+0x2c7/0x450 [ 27.004527] ? lock_release+0xa40/0xa40 [ 27.008465] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 27.014315] ? rcu_note_context_switch+0x710/0x710 [ 27.019211] populate_vma_page_range+0x20e/0x2f0 [ 27.023946] ? get_user_pages+0xc0/0xc0 [ 27.027892] ? vmacache_find+0x5f/0x280 [ 27.031831] ? vmacache_update+0xfe/0x130 [ 27.035944] ? find_vma+0x30/0x150 [ 27.039450] __mm_populate+0x23a/0x450 [ 27.043306] ? populate_vma_page_range+0x2f0/0x2f0 [ 27.048201] ? down_read_killable+0x180/0x180 [ 27.052660] ? security_mmap_file+0x143/0x180 [ 27.057126] vm_mmap_pgoff+0x241/0x280 [ 27.060981] ? vma_is_stack_for_current+0xa0/0xa0 [ 27.065797] ? putname+0xee/0x130 [ 27.069223] ? rcu_read_lock_sched_held+0x108/0x120 [ 27.074206] ? kmem_cache_free+0x267/0x2a0 [ 27.078414] SyS_mmap_pgoff+0x462/0x5f0 [ 27.082355] ? find_mergeable_anon_vma+0xd0/0xd0 [ 27.087076] ? do_fast_syscall_32+0x156/0xf9d [ 27.091541] ? find_mergeable_anon_vma+0xd0/0xd0 [ 27.096264] do_fast_syscall_32+0x3ee/0xf9d [ 27.100555] ? do_int80_syscall_32+0x9d0/0x9d0 [ 27.105111] ? syscall_return_slowpath+0x2ad/0x550 [ 27.110014] ? prepare_exit_to_usermode+0x340/0x340 [ 27.115002] ? sysret32_from_system_call+0x5/0x3b [ 27.119817] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.124627] entry_SYSENTER_compat+0x54/0x63 [ 27.129001] RIP: 0023:0xf7f28c79 [ 27.132336] RSP: 002b:00000000f7f241ec EFLAGS: 00000292 ORIG_RAX: 00000000000000c0 [ 27.140021] RAX: ffffffffffffffda RBX: 0000000020ac6000 RCX: 0000000000004000 [ 27.147255] RDX: 0000000001000004 RSI: 0000000000008011 RDI: 000000000000000a [ 27.154489] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 27.161726] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 27.168964] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 27.176815] 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 [ 27.195887] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c09b7388 [ 27.202421] ---[ end trace cbc9ce7fff497d6d ]--- [ 27.207346] Kernel panic - not syncing: Fatal exception [ 27.213098] Dumping ftrace buffer: [ 27.216610] (ftrace buffer empty) [ 27.220284] Kernel Offset: disabled [ 27.223876] Rebooting in 86400 seconds..