[....] Starting enhanced syslogd: rsyslogd[ 12.239249] audit: type=1400 audit(1515337479.245:5): avc: denied { syslog } for pid=3343 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: [ 19.184852] audit: type=1400 audit(1515337486.190:6): 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 '10.128.0.41' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program [ 30.770309] audit: type=1400 audit(1515337497.775:7): avc: denied { map } for pid=3498 comm="syzkaller297306" path="/root/syzkaller297306860" 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 executing program [ 30.796696] audit: type=1400 audit(1515337497.783:8): avc: denied { map } for pid=3498 comm="syzkaller297306" path="/dev/usbmon0" dev="devtmpfs" ino=1129 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 [ 30.856780] page:ffffea00073f5840 count:0 mapcount:0 mapping: (null) index:0x0 [ 30.865036] flags: 0x2fffc0000000000() [ 30.868928] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 30.876835] raw: ffffea0006ff4020 ffffea0006ff0a20 0000000000000000 0000000000000000 [ 30.884724] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 30.891848] ------------[ cut here ]------------ [ 30.896577] kernel BUG at ./include/linux/mm.h:844! [ 30.901623] invalid opcode: 0000 [#1] SMP KASAN [ 30.906265] Dumping ftrace buffer: [ 30.909769] (ftrace buffer empty) [ 30.913447] Modules linked in: [ 30.916614] CPU: 0 PID: 3499 Comm: syzkaller297306 Not tainted 4.15.0-rc6+ #160 [ 30.924029] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.933358] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 30.938345] RSP: 0018:ffff8801bfd37388 EFLAGS: 00010203 [ 30.943680] RAX: 0000000000000000 RBX: 1ffff10037fa6e73 RCX: 0000000000000000 [ 30.950916] RDX: 0000000000000000 RSI: 1ffff10037fa6dbd RDI: ffffed0037fa6e60 [ 30.958152] RBP: ffff8801bfd37460 R08: 1ffff10037fa6d7f R09: 0000000000000000 [ 30.965387] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10037fa6e77 [ 30.972621] R13: dffffc0000000000 R14: ffff8801bfd376b8 R15: ffffea00073f5840 [ 30.979855] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f7fa8b40 [ 30.988055] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 30.993902] CR2: 00000000208be000 CR3: 00000001bfc20006 CR4: 00000000001606f0 [ 31.001141] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 31.008384] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 31.015620] Call Trace: [ 31.018175] ? mon_alloc_buff+0x1a0/0x1a0 [ 31.022300] ? find_held_lock+0x35/0x1d0 [ 31.026333] __do_fault+0xeb/0x30f [ 31.029840] ? pte_offset_kernel+0xc7/0xc7 [ 31.034039] ? rb_insert_color_cached+0x1660/0x1660 [ 31.039028] ? rcutorture_record_progress+0x10/0x10 [ 31.044010] ? check_noncircular+0x20/0x20 [ 31.048218] __handle_mm_fault+0x1d8f/0x3ce0 [ 31.052594] ? __pmd_alloc+0x4e0/0x4e0 [ 31.056445] ? __save_stack_trace+0x7e/0xd0 [ 31.060741] ? find_held_lock+0x35/0x1d0 [ 31.064769] ? handle_mm_fault+0x248/0x8d0 [ 31.068968] ? lock_downgrade+0x980/0x980 [ 31.073091] handle_mm_fault+0x334/0x8d0 [ 31.077119] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 31.081665] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 31.087513] ? find_vma+0x30/0x150 [ 31.091021] __get_user_pages+0x50c/0x15f0 [ 31.095485] ? follow_page_mask+0x17f0/0x17f0 [ 31.099953] ? lock_acquire+0x1d5/0x580 [ 31.103891] ? lock_acquire+0x1d5/0x580 [ 31.107830] ? __mm_populate+0x2c7/0x450 [ 31.111857] ? lock_release+0xa40/0xa40 [ 31.115797] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 31.121661] ? rcu_note_context_switch+0x710/0x710 [ 31.126566] populate_vma_page_range+0x20e/0x2f0 [ 31.131289] ? get_user_pages+0xc0/0xc0 [ 31.135229] ? vmacache_find+0x5f/0x280 [ 31.139167] ? vmacache_update+0xfe/0x130 [ 31.143282] ? find_vma+0x30/0x150 [ 31.146788] __mm_populate+0x23a/0x450 [ 31.150647] ? populate_vma_page_range+0x2f0/0x2f0 [ 31.155548] ? down_read_killable+0x180/0x180 [ 31.160008] ? security_mmap_file+0x143/0x180 [ 31.164470] vm_mmap_pgoff+0x241/0x280 [ 31.168327] ? vma_is_stack_for_current+0xa0/0xa0 [ 31.173133] ? putname+0xee/0x130 [ 31.176550] ? rcu_read_lock_sched_held+0x108/0x120 [ 31.181532] ? kmem_cache_free+0x267/0x2a0 [ 31.185741] SyS_mmap_pgoff+0x462/0x5f0 [ 31.189682] ? find_mergeable_anon_vma+0xd0/0xd0 [ 31.194404] ? do_fast_syscall_32+0x156/0xf9d [ 31.198866] ? find_mergeable_anon_vma+0xd0/0xd0 [ 31.203591] do_fast_syscall_32+0x3ee/0xf9d [ 31.207883] ? do_int80_syscall_32+0x9d0/0x9d0 [ 31.212434] ? syscall_return_slowpath+0x2ad/0x550 [ 31.217331] ? prepare_exit_to_usermode+0x340/0x340 [ 31.222328] ? sysret32_from_system_call+0x5/0x3b [ 31.227136] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.231946] entry_SYSENTER_compat+0x54/0x63 [ 31.236320] RIP: 0023:0xf7facc79 [ 31.239658] RSP: 002b:00000000f7fa81ec EFLAGS: 00000292 ORIG_RAX: 00000000000000c0 [ 31.247331] RAX: ffffffffffffffda RBX: 0000000020ac6000 RCX: 0000000000004000 [ 31.254590] RDX: 0000000001000004 RSI: 0000000000008011 RDI: 000000000000000f [ 31.261824] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 31.269061] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 31.276316] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 31.283565] 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 [ 31.302647] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801bfd37388 [ 31.309180] ---[ end trace 8d30fdd41875d3a4 ]--- [ 31.314054] Kernel panic - not syncing: Fatal exception [ 31.319812] Dumping ftrace buffer: [ 31.323324] (ftrace buffer empty) [ 31.327005] Kernel Offset: disabled [ 31.330600] Rebooting in 86400 seconds..