[....] Starting enhanced syslogd: rsyslogd[ 12.724058] audit: type=1400 audit(1515373656.653:5): avc: denied { syslog } for pid=3346 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: [ 19.209528] audit: type=1400 audit(1515373663.139:6): avc: denied { map } for pid=3485 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 '10.128.15.222' (ECDSA) to the list of known hosts. [ 40.252040] audit: type=1400 audit(1515373684.181:7): avc: denied { map } for pid=3502 comm="syzkaller637310" path="/root/syzkaller637310638" 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 [ 40.437086] audit: type=1400 audit(1515373684.366:8): avc: denied { map } for pid=3503 comm="syzkaller637310" path="/dev/usbmon0" dev="devtmpfs" ino=8808 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 [ 40.467211] page:ffffea000703e840 count:0 mapcount:0 mapping: (null) index:0x0 [ 40.475613] flags: 0x2fffc0000000000() [ 40.479569] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 40.487546] raw: ffffea00070118e0 ffffea000703e8a0 0000000000000000 0000000000000000 [ 40.495460] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 40.502575] ------------[ cut here ]------------ [ 40.507304] kernel BUG at ./include/linux/mm.h:844! [ 40.512358] invalid opcode: 0000 [#1] SMP KASAN [ 40.517002] Dumping ftrace buffer: [ 40.520508] (ftrace buffer empty) [ 40.524185] Modules linked in: [ 40.527345] CPU: 0 PID: 3504 Comm: syzkaller637310 Not tainted 4.15.0-rc6+ #251 [ 40.534755] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.544087] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 40.549068] RSP: 0018:ffff8801bff37510 EFLAGS: 00010203 [ 40.554397] RAX: 0000000000000000 RBX: 1ffff10037fe6ea4 RCX: 0000000000000000 [ 40.561725] RDX: 0000000000000000 RSI: 1ffff10037fe6dee RDI: ffffed0037fe6e90 [ 40.568960] RBP: ffff8801bff375e8 R08: 1ffff10037fe6db0 R09: 0000000000000000 [ 40.576196] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10037fe6ea8 [ 40.583433] R13: dffffc0000000000 R14: ffff8801bff37840 R15: ffffea000703e840 [ 40.590673] FS: 00007f480cd61700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 40.598864] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.604712] CR2: 00000000208be000 CR3: 00000001c086d001 CR4: 00000000001606f0 [ 40.611950] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 40.619185] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 40.626421] Call Trace: [ 40.628979] ? mon_alloc_buff+0x1a0/0x1a0 [ 40.633094] ? find_held_lock+0x35/0x1d0 [ 40.637137] __do_fault+0xeb/0x30f [ 40.640645] ? pte_offset_kernel+0xc7/0xc7 [ 40.644846] ? print_irqtrace_events+0x270/0x270 [ 40.649574] ? rb_insert_color_cached+0x1660/0x1660 [ 40.654564] ? check_noncircular+0x20/0x20 [ 40.658772] __handle_mm_fault+0x1d8f/0x3ce0 [ 40.663154] ? __pmd_alloc+0x4e0/0x4e0 [ 40.667009] ? __save_stack_trace+0x7e/0xd0 [ 40.671743] ? find_held_lock+0x35/0x1d0 [ 40.675777] ? handle_mm_fault+0x248/0x8d0 [ 40.679979] ? lock_downgrade+0x980/0x980 [ 40.684103] handle_mm_fault+0x334/0x8d0 [ 40.688131] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 40.692681] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 40.698537] ? find_vma+0x30/0x150 [ 40.702048] __get_user_pages+0x50c/0x15f0 [ 40.706264] ? follow_page_mask+0x17f0/0x17f0 [ 40.710729] ? lock_acquire+0x1d5/0x580 [ 40.714676] ? lock_acquire+0x1d5/0x580 [ 40.718619] ? __mm_populate+0x2c7/0x450 [ 40.722659] ? lock_release+0xa40/0xa40 [ 40.726607] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 40.732469] ? rcu_note_context_switch+0x710/0x710 [ 40.737376] populate_vma_page_range+0x20e/0x2f0 [ 40.742111] ? get_user_pages+0xc0/0xc0 [ 40.746055] ? vmacache_find+0x5f/0x280 [ 40.750000] ? vmacache_update+0xfe/0x130 [ 40.754118] ? find_vma+0x30/0x150 [ 40.757625] __mm_populate+0x23a/0x450 [ 40.761483] ? populate_vma_page_range+0x2f0/0x2f0 [ 40.766379] ? down_read_killable+0x180/0x180 [ 40.770853] ? security_mmap_file+0x143/0x180 [ 40.775321] vm_mmap_pgoff+0x241/0x280 [ 40.779178] ? vma_is_stack_for_current+0xa0/0xa0 [ 40.783990] ? ___sys_recvmsg+0x640/0x640 [ 40.788110] ? selinux_capable+0x40/0x40 [ 40.792146] SyS_mmap_pgoff+0x462/0x5f0 [ 40.796097] ? find_mergeable_anon_vma+0xd0/0xd0 [ 40.800822] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 40.805898] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 40.810632] SyS_mmap+0x16/0x20 [ 40.813885] entry_SYSCALL_64_fastpath+0x23/0x9a [ 40.818606] RIP: 0033:0x4498c9 [ 40.821764] RSP: 002b:00007f480cd60d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 40.829438] RAX: ffffffffffffffda RBX: 00000000006dbc24 RCX: 00000000004498c9 [ 40.836687] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 40.843931] RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000 [ 40.851176] R10: 0000000000008011 R11: 0000000000000212 R12: 00000000006dbc20 [ 40.858411] R13: 6273752f7665642f R14: 00007f480cd619c0 R15: 0000000000000005 [ 40.865659] 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 [ 40.884728] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801bff37510 [ 40.891252] ---[ end trace 34ebde7396ed0e2d ]--- [ 40.896065] Kernel panic - not syncing: Fatal exception [ 40.901472] Dumping ftrace buffer: [ 40.904983] (ftrace buffer empty) [ 40.908661] Kernel Offset: disabled [ 40.912261] Rebooting in 86400 seconds..