[....] Starting enhanced syslogd: rsyslogd[ 10.658903] audit: type=1400 audit(1514079119.512:5): avc: denied { syslog } for pid=2989 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 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: [ 16.540276] audit: type=1400 audit(1514079125.394:6): avc: denied { map } for pid=3128 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 'ci-upstream-kasan-gce-386-0,10.128.0.42' (ECDSA) to the list of known hosts. executing program executing program executing program [ 22.704180] audit: type=1400 audit(1514079131.557:7): avc: denied { map } for pid=3142 comm="syzkaller460716" path="/root/syzkaller460716053" 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 [ 22.730935] audit: type=1400 audit(1514079131.584:8): avc: denied { map } for pid=3142 comm="syzkaller460716" path="/dev/usbmon0" dev="devtmpfs" ino=8951 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 [ 22.758659] page:0000000064ef89f8 count:0 mapcount:0 mapping: (null) index:0x0 [ 22.766916] flags: 0x2fffc0000000000() [ 22.770820] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 22.778717] raw: ffffea0007234b60 ffffea000729f1e0 0000000000000000 0000000000000000 [ 22.786607] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 22.793706] ------------[ cut here ]------------ [ 22.798431] kernel BUG at ./include/linux/mm.h:844! [ 22.803575] invalid opcode: 0000 [#1] SMP KASAN [ 22.808225] Dumping ftrace buffer: [ 22.811728] (ftrace buffer empty) [ 22.815406] Modules linked in: [ 22.818566] CPU: 0 PID: 3143 Comm: syzkaller460716 Not tainted 4.15.0-rc4+ #146 [ 22.825977] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 22.835307] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 22.840295] RSP: 0018:ffff8801c8e1f388 EFLAGS: 00010203 [ 22.845635] RAX: 0000000000000000 RBX: 1ffff100391c3e73 RCX: 0000000000000000 [ 22.852871] RDX: 0000000000000000 RSI: 1ffff100391c3dbd RDI: ffffed00391c3e60 [ 22.860105] RBP: ffff8801c8e1f460 R08: 1ffff100391c3d7f R09: 0000000000000000 [ 22.867342] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff100391c3e77 [ 22.875017] R13: dffffc0000000000 R14: ffff8801c8e1f6b8 R15: ffffea0007321d00 [ 22.882256] FS: 0000000000000000(0000) GS:ffff8801db400000(0063) knlGS:00000000f7f91b40 [ 22.890446] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 22.896295] CR2: 000055635f7a1098 CR3: 00000001ca620006 CR4: 00000000001606f0 [ 22.903541] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.910776] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.918014] Call Trace: [ 22.920579] ? mon_alloc_buff+0x1a0/0x1a0 [ 22.924695] ? find_held_lock+0x35/0x1d0 [ 22.928732] __do_fault+0xeb/0x30f [ 22.932241] ? pte_offset_kernel+0xc7/0xc7 [ 22.936459] ? rb_insert_color_cached+0x1660/0x1660 [ 22.941444] ? rcutorture_record_progress+0x10/0x10 [ 22.946428] ? check_noncircular+0x20/0x20 [ 22.950629] __handle_mm_fault+0x1d8f/0x3ce0 [ 22.955023] ? __pmd_alloc+0x4e0/0x4e0 [ 22.958880] ? __save_stack_trace+0x7e/0xd0 [ 22.963170] ? find_held_lock+0x35/0x1d0 [ 22.967209] ? handle_mm_fault+0x248/0x8d0 [ 22.971409] ? lock_downgrade+0x980/0x980 [ 22.975545] handle_mm_fault+0x334/0x8d0 [ 22.979573] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 22.984123] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 22.989972] ? find_vma+0x30/0x150 [ 22.993481] __get_user_pages+0x50c/0x15f0 [ 22.997687] ? follow_page_mask+0x17f0/0x17f0 [ 23.002151] ? lock_acquire+0x1d5/0x580 [ 23.006090] ? lock_acquire+0x1d5/0x580 [ 23.010048] ? __mm_populate+0x2c7/0x450 [ 23.014076] ? lock_release+0xa40/0xa40 [ 23.018019] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.023876] ? rcu_note_context_switch+0x710/0x710 [ 23.028783] populate_vma_page_range+0x20e/0x2f0 [ 23.033505] ? get_user_pages+0xc0/0xc0 [ 23.037444] ? vmacache_find+0x5f/0x280 [ 23.041384] ? vmacache_update+0xfe/0x130 [ 23.045499] ? find_vma+0x30/0x150 [ 23.049009] __mm_populate+0x23a/0x450 [ 23.052868] ? populate_vma_page_range+0x2f0/0x2f0 [ 23.057765] ? down_read_killable+0x180/0x180 [ 23.062226] ? security_mmap_file+0x143/0x180 [ 23.066692] vm_mmap_pgoff+0x241/0x280 [ 23.070548] ? vma_is_stack_for_current+0xa0/0xa0 [ 23.075358] ? kmem_cache_free+0x267/0x2a0 [ 23.079565] SyS_mmap_pgoff+0x462/0x5f0 [ 23.083504] ? find_mergeable_anon_vma+0xd0/0xd0 [ 23.088228] ? do_fast_syscall_32+0x156/0xf9d [ 23.092689] ? find_mergeable_anon_vma+0xd0/0xd0 [ 23.097419] do_fast_syscall_32+0x3ee/0xf9d [ 23.101886] ? do_int80_syscall_32+0x9d0/0x9d0 [ 23.106436] ? syscall_return_slowpath+0x2ad/0x550 [ 23.111332] ? prepare_exit_to_usermode+0x340/0x340 [ 23.116922] ? sysret32_from_system_call+0x5/0x3b [ 23.121992] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 23.126812] entry_SYSENTER_compat+0x54/0x63 [ 23.131186] RIP: 0023:0xf7f95c79 [ 23.134516] RSP: 002b:00000000f7f911ec EFLAGS: 00000292 ORIG_RAX: 00000000000000c0 [ 23.142191] RAX: ffffffffffffffda RBX: 0000000020ac6000 RCX: 0000000000004000 [ 23.149426] RDX: 0000000001000004 RSI: 0000000000008011 RDI: 000000000000000c [ 23.156660] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 23.163896] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 23.171131] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 23.178373] 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 3b bf a4 fd 48 c7 c6 c0 c0 70 85 4c 89 ff e8 2c a3 cd fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 17 bf a4 fd [ 23.197439] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c8e1f388 [ 23.203982] ---[ end trace f5ac637753c1bd6e ]--- [ 23.208874] Kernel panic - not syncing: Fatal exception [ 23.214999] Dumping ftrace buffer: [ 23.218517] (ftrace buffer empty) [ 23.223678] Kernel Offset: disabled [ 23.227275] Rebooting in 86400 seconds..