[....] Starting enhanced syslogd: rsyslogd[ 12.793092] audit: type=1400 audit(1515705715.632:5): 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: [ 19.176428] audit: type=1400 audit(1515705722.016:6): avc: denied { map } for pid=3482 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 '10.128.0.58' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program [ 25.367137] audit: type=1400 audit(1515705728.206:7): avc: denied { map } for pid=3496 comm="syzkaller954727" path="/root/syzkaller954727029" 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 [ 25.393494] audit: type=1400 audit(1515705728.214:8): avc: denied { map } for pid=3496 comm="syzkaller954727" path="/dev/usbmon0" dev="devtmpfs" ino=8941 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 [ 25.431397] page:ffffea000731d040 count:0 mapcount:0 mapping: (null) index:0x0 [ 25.439653] flags: 0x2fffc0000000000() [ 25.443579] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 25.451509] raw: ffffea0007339560 ffffea000731d0e0 0000000000000000 0000000000000000 [ 25.459408] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 25.466516] ------------[ cut here ]------------ [ 25.471245] kernel BUG at ./include/linux/mm.h:844! [ 25.476286] invalid opcode: 0000 [#1] SMP KASAN [ 25.480937] Dumping ftrace buffer: [ 25.484445] (ftrace buffer empty) [ 25.488122] Modules linked in: [ 25.491290] CPU: 0 PID: 3497 Comm: syzkaller954727 Not tainted 4.15.0-rc7+ #167 [ 25.498709] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.508041] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 25.513019] RSP: 0018:ffff8801c063f388 EFLAGS: 00010203 [ 25.518345] RAX: 0000000000000000 RBX: 1ffff100380c7e73 RCX: 0000000000000000 [ 25.525581] RDX: 0000000000000000 RSI: 1ffff100380c7dbd RDI: ffffed00380c7e60 [ 25.532825] RBP: ffff8801c063f460 R08: 1ffff100380c7d7f R09: 0000000000000000 [ 25.540059] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff100380c7e77 [ 25.547294] R13: dffffc0000000000 R14: ffff8801c063f6b8 R15: ffffea000731d040 [ 25.554531] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f7febb40 [ 25.562722] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 25.568568] CR2: 0000561f02213480 CR3: 00000001c0065003 CR4: 00000000001606f0 [ 25.575805] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.583041] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.590276] Call Trace: [ 25.592921] ? mon_alloc_buff+0x1a0/0x1a0 [ 25.597037] ? find_held_lock+0x35/0x1d0 [ 25.601078] __do_fault+0xeb/0x30f [ 25.604584] ? pte_offset_kernel+0xc7/0xc7 [ 25.608785] ? rb_insert_color_cached+0x1660/0x1660 [ 25.613769] ? rcutorture_record_progress+0x10/0x10 [ 25.618750] ? check_noncircular+0x20/0x20 [ 25.622951] __handle_mm_fault+0x1d8f/0x3ce0 [ 25.627328] ? __pmd_alloc+0x4e0/0x4e0 [ 25.631180] ? __save_stack_trace+0x7e/0xd0 [ 25.635487] ? find_held_lock+0x35/0x1d0 [ 25.639517] ? handle_mm_fault+0x248/0x8d0 [ 25.643719] ? lock_downgrade+0x980/0x980 [ 25.647843] handle_mm_fault+0x334/0x8d0 [ 25.651879] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 25.656426] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.662276] ? find_vma+0x30/0x150 [ 25.665784] __get_user_pages+0x50c/0x15f0 [ 25.669988] ? follow_page_mask+0x17f0/0x17f0 [ 25.674453] ? lock_acquire+0x1d5/0x580 [ 25.678391] ? lock_acquire+0x1d5/0x580 [ 25.682340] ? __mm_populate+0x2c7/0x450 [ 25.686378] ? lock_release+0xa40/0xa40 [ 25.690316] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.696169] ? rcu_note_context_switch+0x710/0x710 [ 25.701068] populate_vma_page_range+0x20e/0x2f0 [ 25.705795] ? get_user_pages+0xc0/0xc0 [ 25.709743] ? vmacache_find+0x5f/0x280 [ 25.713684] ? vmacache_update+0xfe/0x130 [ 25.717809] ? find_vma+0x30/0x150 [ 25.721316] __mm_populate+0x23a/0x450 [ 25.725170] ? populate_vma_page_range+0x2f0/0x2f0 [ 25.730064] ? down_read_killable+0x180/0x180 [ 25.734527] ? security_mmap_file+0x143/0x180 [ 25.738994] vm_mmap_pgoff+0x241/0x280 [ 25.742853] ? vma_is_stack_for_current+0xa0/0xa0 [ 25.747665] ? task_work_run+0x1f4/0x270 [ 25.751703] SyS_mmap_pgoff+0x462/0x5f0 [ 25.755648] ? find_mergeable_anon_vma+0xd0/0xd0 [ 25.760372] ? do_fast_syscall_32+0x156/0xf9d [ 25.764835] ? find_mergeable_anon_vma+0xd0/0xd0 [ 25.769556] do_fast_syscall_32+0x3ee/0xf9d [ 25.773846] ? do_int80_syscall_32+0x9d0/0x9d0 [ 25.778397] ? syscall_return_slowpath+0x2ad/0x550 [ 25.783292] ? prepare_exit_to_usermode+0x340/0x340 [ 25.788276] ? sysret32_from_system_call+0x5/0x3b [ 25.793097] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.797913] entry_SYSENTER_compat+0x54/0x63 [ 25.802287] RIP: 0023:0xf7fefc79 [ 25.805616] RSP: 002b:00000000f7feb1ec EFLAGS: 00000292 ORIG_RAX: 00000000000000c0 [ 25.813293] RAX: ffffffffffffffda RBX: 0000000020ac6000 RCX: 0000000000004000 [ 25.820527] RDX: 0000000001000004 RSI: 0000000000008011 RDI: 000000000000000d [ 25.827763] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 25.835002] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 25.842242] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 25.849494] 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 cb 9c 94 fd 48 c7 c6 a0 b1 12 86 4c 89 ff e8 dc 89 bd fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 a7 9c 94 fd [ 25.868562] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c063f388 [ 25.875093] ---[ end trace c6034317f5e5382e ]--- [ 25.880081] Kernel panic - not syncing: Fatal exception [ 25.885828] Dumping ftrace buffer: [ 25.889337] (ftrace buffer empty) [ 25.893013] Kernel Offset: disabled [ 25.896605] Rebooting in 86400 seconds..