[....] Starting enhanced syslogd: rsyslogd[ 11.349266] audit: type=1400 audit(1515466641.225:5): avc: denied { syslog } for pid=3316 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: [ 15.869111] audit: type=1400 audit(1515466645.744:6): avc: denied { map } for pid=3456 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 '10.128.15.223' (ECDSA) to the list of known hosts. executing program executing program executing program [ 39.379115] audit: type=1400 audit(1515466669.254:7): avc: denied { map } for pid=3474 comm="syzkaller222654" path="/root/syzkaller222654787" 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 [ 39.405185] audit: type=1400 audit(1515466669.255:8): avc: denied { map } for pid=3474 comm="syzkaller222654" path="/dev/usbmon0" dev="devtmpfs" ino=1164 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 [ 39.444772] page:ffffea0007027280 count:0 mapcount:0 mapping: (null) index:0x0 [ 39.453082] flags: 0x2fffc0000000000() [ 39.456999] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 39.465241] raw: ffffea000702bf60 ffffea00070272e0 0000000000000000 0000000000000000 [ 39.473470] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 39.480556] ------------[ cut here ]------------ [ 39.485277] kernel BUG at ./include/linux/mm.h:844! [ 39.490297] invalid opcode: 0000 [#1] SMP KASAN [ 39.494933] Dumping ftrace buffer: [ 39.498436] (ftrace buffer empty) [ 39.502112] Modules linked in: [ 39.505278] CPU: 1 PID: 3475 Comm: syzkaller222654 Not tainted 4.15.0-rc7+ #163 [ 39.512686] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.522016] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 39.526998] RSP: 0018:ffff8801c0bff388 EFLAGS: 00010203 [ 39.532327] RAX: 0000000000000000 RBX: 1ffff1003817fe73 RCX: 0000000000000000 [ 39.539562] RDX: 0000000000000000 RSI: 1ffff1003817fdbd RDI: ffffed003817fe60 [ 39.546796] RBP: ffff8801c0bff460 R08: 1ffff1003817fd7f R09: 0000000000000000 [ 39.554035] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff1003817fe77 [ 39.562834] R13: dffffc0000000000 R14: ffff8801c0bff6b8 R15: ffffea0007027280 [ 39.570072] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f7f34b40 [ 39.578261] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 39.584110] CR2: 00000000208be000 CR3: 00000001c09f8005 CR4: 00000000001606e0 [ 39.591347] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 39.598584] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 39.605818] Call Trace: [ 39.608385] ? mon_alloc_buff+0x1a0/0x1a0 [ 39.612499] ? find_held_lock+0x35/0x1d0 [ 39.616532] __do_fault+0xeb/0x30f [ 39.620223] ? pte_offset_kernel+0xc7/0xc7 [ 39.624426] ? rb_insert_color_cached+0x1660/0x1660 [ 39.629408] ? rcutorture_record_progress+0x10/0x10 [ 39.634389] ? check_noncircular+0x20/0x20 [ 39.638590] __handle_mm_fault+0x1d8f/0x3ce0 [ 39.642964] ? __pmd_alloc+0x4e0/0x4e0 [ 39.646818] ? __save_stack_trace+0x7e/0xd0 [ 39.651106] ? find_held_lock+0x35/0x1d0 [ 39.655144] ? handle_mm_fault+0x248/0x8d0 [ 39.659346] ? lock_downgrade+0x980/0x980 [ 39.663470] handle_mm_fault+0x334/0x8d0 [ 39.667495] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 39.672040] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 39.677890] ? find_vma+0x30/0x150 [ 39.681397] __get_user_pages+0x50c/0x15f0 [ 39.685603] ? follow_page_mask+0x17f0/0x17f0 [ 39.690068] ? lock_acquire+0x1d5/0x580 [ 39.694005] ? lock_acquire+0x1d5/0x580 [ 39.697946] ? __mm_populate+0x2c7/0x450 [ 39.701973] ? lock_release+0xa40/0xa40 [ 39.705914] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 39.711764] ? rcu_note_context_switch+0x710/0x710 [ 39.716661] populate_vma_page_range+0x20e/0x2f0 [ 39.721382] ? get_user_pages+0xc0/0xc0 [ 39.725326] ? vmacache_find+0x5f/0x280 [ 39.729264] ? vmacache_update+0xfe/0x130 [ 39.733375] ? find_vma+0x30/0x150 [ 39.736882] __mm_populate+0x23a/0x450 [ 39.740735] ? populate_vma_page_range+0x2f0/0x2f0 [ 39.745627] ? down_read_killable+0x180/0x180 [ 39.750098] ? security_mmap_file+0x143/0x180 [ 39.754563] vm_mmap_pgoff+0x241/0x280 [ 39.758420] ? vma_is_stack_for_current+0xa0/0xa0 [ 39.763241] ? putname+0xee/0x130 [ 39.766665] ? rcu_read_lock_sched_held+0x108/0x120 [ 39.772440] ? kmem_cache_free+0x267/0x2a0 [ 39.778477] SyS_mmap_pgoff+0x462/0x5f0 [ 39.782768] ? find_mergeable_anon_vma+0xd0/0xd0 [ 39.787503] ? do_fast_syscall_32+0x156/0xf9d [ 39.791971] ? find_mergeable_anon_vma+0xd0/0xd0 [ 39.796694] do_fast_syscall_32+0x3ee/0xf9d [ 39.800984] ? do_int80_syscall_32+0x9d0/0x9d0 [ 39.805537] ? syscall_return_slowpath+0x2ad/0x550 [ 39.810431] ? prepare_exit_to_usermode+0x340/0x340 [ 39.815416] ? sysret32_from_system_call+0x5/0x3b [ 39.820227] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.825046] entry_SYSENTER_compat+0x54/0x63 [ 39.829426] RIP: 0023:0xf7f38c79 [ 39.832754] RSP: 002b:00000000f7f341ec EFLAGS: 00000292 ORIG_RAX: 00000000000000c0 [ 39.840426] RAX: ffffffffffffffda RBX: 0000000020ac6000 RCX: 0000000000004000 [ 39.847663] RDX: 0000000001000004 RSI: 0000000000008011 RDI: 0000000000000019 [ 39.854897] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 39.862133] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 39.869369] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 39.876609] 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 bb 9d 94 fd 48 c7 c6 a0 b1 12 86 4c 89 ff e8 cc 8a bd fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 97 9d 94 fd [ 39.895686] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c0bff388 [ 39.902193] ---[ end trace e3434ab7857648ca ]--- [ 39.907035] Kernel panic - not syncing: Fatal exception [ 39.912396] Dumping ftrace buffer: [ 39.915903] (ftrace buffer empty) [ 39.919578] Kernel Offset: disabled [ 39.923170] Rebooting in 86400 seconds..