[....] Starting enhanced syslogd: rsyslogd[ 12.793492] audit: type=1400 audit(1515350770.255:5): avc: denied { syslog } for pid=3341 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: [ 18.955717] audit: type=1400 audit(1515350776.417:6): 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 '10.128.0.11' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program [ 25.529457] audit: type=1400 audit(1515350782.991:7): avc: denied { map } for pid=3496 comm="syzkaller034826" path="/root/syzkaller034826871" 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 [ 25.555553] audit: type=1400 audit(1515350782.999:8): avc: denied { map } for pid=3496 comm="syzkaller034826" path="/dev/usbmon0" dev="devtmpfs" ino=8890 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 [ 25.593807] page:ffffea000701e3c0 count:0 mapcount:0 mapping: (null) index:0x0 [ 25.602126] flags: 0x2fffc0000000000() [ 25.606052] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 25.613966] raw: ffffea0007007ba0 ffffea000701dd20 0000000000000000 0000000000000000 [ 25.621884] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 25.629021] ------------[ cut here ]------------ [ 25.633763] kernel BUG at ./include/linux/mm.h:844! [ 25.638807] invalid opcode: 0000 [#1] SMP KASAN [ 25.643446] Dumping ftrace buffer: [ 25.646956] (ftrace buffer empty) [ 25.650634] Modules linked in: [ 25.653799] CPU: 0 PID: 3497 Comm: syzkaller034826 Not tainted 4.15.0-rc6+ #160 [ 25.661211] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.670560] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 25.675543] RSP: 0018:ffff8801c0b5f388 EFLAGS: 00010203 [ 25.680873] RAX: 0000000000000000 RBX: 1ffff1003816be73 RCX: 0000000000000000 [ 25.688109] RDX: 0000000000000000 RSI: 1ffff1003816bdbd RDI: ffffed003816be60 [ 25.695348] RBP: ffff8801c0b5f460 R08: 1ffff1003816bd7f R09: 0000000000000000 [ 25.702588] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff1003816be77 [ 25.709831] R13: dffffc0000000000 R14: ffff8801c0b5f6b8 R15: ffffea000701e3c0 [ 25.717070] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f7f8eb40 [ 25.725264] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 25.731112] CR2: 00000000208be000 CR3: 00000001bfca0001 CR4: 00000000001606f0 [ 25.738365] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.745614] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.752854] Call Trace: [ 25.755425] ? mon_alloc_buff+0x1a0/0x1a0 [ 25.759548] ? find_held_lock+0x35/0x1d0 [ 25.763588] __do_fault+0xeb/0x30f [ 25.767113] ? pte_offset_kernel+0xc7/0xc7 [ 25.771319] ? rb_insert_color_cached+0x1660/0x1660 [ 25.776315] ? rcutorture_record_progress+0x10/0x10 [ 25.781313] ? check_noncircular+0x20/0x20 [ 25.785542] __handle_mm_fault+0x1d8f/0x3ce0 [ 25.789935] ? __pmd_alloc+0x4e0/0x4e0 [ 25.793817] ? __save_stack_trace+0x7e/0xd0 [ 25.798113] ? find_held_lock+0x35/0x1d0 [ 25.802148] ? handle_mm_fault+0x248/0x8d0 [ 25.806350] ? lock_downgrade+0x980/0x980 [ 25.810475] handle_mm_fault+0x334/0x8d0 [ 25.814503] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 25.819053] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.824907] ? find_vma+0x30/0x150 [ 25.828418] __get_user_pages+0x50c/0x15f0 [ 25.832627] ? follow_page_mask+0x17f0/0x17f0 [ 25.837107] ? lock_acquire+0x1d5/0x580 [ 25.841048] ? lock_acquire+0x1d5/0x580 [ 25.845004] ? __mm_populate+0x2c7/0x450 [ 25.849037] ? lock_release+0xa40/0xa40 [ 25.852980] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.858834] ? rcu_note_context_switch+0x710/0x710 [ 25.863734] populate_vma_page_range+0x20e/0x2f0 [ 25.868458] ? get_user_pages+0xc0/0xc0 [ 25.872400] ? vmacache_find+0x5f/0x280 [ 25.876350] ? vmacache_update+0xfe/0x130 [ 25.880464] ? find_vma+0x30/0x150 [ 25.883972] __mm_populate+0x23a/0x450 [ 25.887831] ? populate_vma_page_range+0x2f0/0x2f0 [ 25.892730] ? down_read_killable+0x180/0x180 [ 25.897195] ? security_mmap_file+0x143/0x180 [ 25.901667] vm_mmap_pgoff+0x241/0x280 [ 25.905528] ? vma_is_stack_for_current+0xa0/0xa0 [ 25.910339] ? putname+0xee/0x130 [ 25.913762] ? rcu_read_lock_sched_held+0x108/0x120 [ 25.918746] ? kmem_cache_free+0x267/0x2a0 [ 25.922956] SyS_mmap_pgoff+0x462/0x5f0 [ 25.926902] ? find_mergeable_anon_vma+0xd0/0xd0 [ 25.931629] ? do_fast_syscall_32+0x156/0xf9d [ 25.936103] ? find_mergeable_anon_vma+0xd0/0xd0 [ 25.940827] do_fast_syscall_32+0x3ee/0xf9d [ 25.945118] ? do_int80_syscall_32+0x9d0/0x9d0 [ 25.949672] ? syscall_return_slowpath+0x2ad/0x550 [ 25.954580] ? prepare_exit_to_usermode+0x340/0x340 [ 25.959566] ? sysret32_from_system_call+0x5/0x3b [ 25.964381] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.969199] entry_SYSENTER_compat+0x54/0x63 [ 25.973584] RIP: 0023:0xf7f92c79 [ 25.976926] RSP: 002b:00000000f7f8e1ec EFLAGS: 00000292 ORIG_RAX: 00000000000000c0 [ 25.984613] RAX: ffffffffffffffda RBX: 0000000020ac6000 RCX: 0000000000004000 [ 25.991862] RDX: 0000000001000004 RSI: 0000000000008011 RDI: 000000000000000c [ 25.999112] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 26.006349] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 26.013587] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 26.020834] 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 fb a3 94 fd 48 c7 c6 a0 b1 12 86 4c 89 ff e8 8c 8c bd fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 d7 a3 94 fd [ 26.039909] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c0b5f388 [ 26.046445] ---[ end trace 4bb5d69a0a711c87 ]--- [ 26.051368] Kernel panic - not syncing: Fatal exception [ 26.056736] Dumping ftrace buffer: [ 26.060244] (ftrace buffer empty) [ 26.063922] Kernel Offset: disabled [ 26.067518] Rebooting in 86400 seconds..