[....] Starting enhanced syslogd: rsyslogd[ 11.001389] audit: type=1400 audit(1514467309.364:5): avc: denied { syslog } for pid=2997 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 OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 17.002468] audit: type=1400 audit(1514467315.365:6): avc: denied { map } for pid=3136 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 '10.128.0.28' (ECDSA) to the list of known hosts. executing program executing program executing program executing program [ 23.171657] audit: type=1400 audit(1514467321.534:7): avc: denied { map } for pid=3150 comm="syzkaller108308" path="/root/syzkaller108308426" 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 [ 23.197628] audit: type=1400 audit(1514467321.534:8): avc: denied { map } for pid=3150 comm="syzkaller108308" path="/dev/usbmon0" dev="devtmpfs" ino=8896 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 [ 23.230760] page:000000009e047f66 count:0 mapcount:0 mapping: (null) index:0x0 [ 23.239005] flags: 0x2fffc0000000000() [ 23.242928] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 23.250818] raw: ffffea00075528a0 ffffea000723a820 0000000000000000 0000000000000000 [ 23.258694] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 23.265790] ------------[ cut here ]------------ [ 23.270513] kernel BUG at ./include/linux/mm.h:844! [ 23.275535] invalid opcode: 0000 [#1] SMP KASAN [ 23.280176] Dumping ftrace buffer: [ 23.283679] (ftrace buffer empty) [ 23.287352] Modules linked in: [ 23.290519] CPU: 0 PID: 3151 Comm: syzkaller108308 Not tainted 4.15.0-rc4-next-20171221+ #78 [ 23.299059] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.308395] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 23.313376] RSP: 0018:ffff8801c8407510 EFLAGS: 00010203 [ 23.318711] RAX: 0000000000000000 RBX: 1ffff10039080ea4 RCX: 0000000000000000 [ 23.325959] RDX: 0000000000000000 RSI: 1ffff10039080dee RDI: ffffed0039080e90 [ 23.333199] RBP: ffff8801c84075e8 R08: 1ffff10039080db0 R09: 0000000000000000 [ 23.340436] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10039080ea8 [ 23.347677] R13: dffffc0000000000 R14: ffff8801c8407840 R15: ffffea000723b3c0 [ 23.354915] FS: 00007f1d8d0ab700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 23.363105] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.368952] CR2: 00000000208be000 CR3: 00000001c8ea8003 CR4: 00000000001606f0 [ 23.376187] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.383420] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.390658] Call Trace: [ 23.393217] ? mon_alloc_buff+0x1a0/0x1a0 [ 23.397345] ? finish_fault+0x1b4/0x2a0 [ 23.401284] ? lock_downgrade+0x980/0x980 [ 23.405399] ? do_swap_page+0x2a10/0x2a10 [ 23.409515] __do_fault+0xeb/0x30f [ 23.413020] ? pte_offset_kernel+0xc7/0xc7 [ 23.417219] ? vma_compute_subtree_gap+0x200/0x200 [ 23.422116] ? check_noncircular+0x20/0x20 [ 23.426317] ? _raw_spin_unlock+0x22/0x30 [ 23.430432] __handle_mm_fault+0x1d8f/0x3ce0 [ 23.434811] ? __pmd_alloc+0x4e0/0x4e0 [ 23.438669] ? find_held_lock+0x35/0x1d0 [ 23.442699] ? handle_mm_fault+0x2a0/0x930 [ 23.446905] ? lock_downgrade+0x980/0x980 [ 23.451027] handle_mm_fault+0x38f/0x930 [ 23.455054] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 23.459600] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.465448] ? find_vma+0x30/0x150 [ 23.468956] __get_user_pages+0x50c/0x15f0 [ 23.473160] ? follow_page_mask+0x17f0/0x17f0 [ 23.477627] ? vma_link+0xe9/0x170 [ 23.481134] ? lock_acquire+0x1d5/0x580 [ 23.485072] ? lock_acquire+0x1d5/0x580 [ 23.489007] ? __mm_populate+0x2c7/0x450 [ 23.493036] ? lock_release+0xa40/0xa40 [ 23.496974] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.502821] ? rcu_note_context_switch+0x710/0x710 [ 23.507720] populate_vma_page_range+0x20e/0x2f0 [ 23.512448] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 23.517338] ? vmacache_find+0x5f/0x280 [ 23.521277] ? vmacache_update+0xfe/0x130 [ 23.525392] ? find_vma+0x30/0x150 [ 23.528897] __mm_populate+0x23a/0x450 [ 23.532756] ? populate_vma_page_range+0x2f0/0x2f0 [ 23.537650] ? down_read_killable+0x180/0x180 [ 23.542112] ? security_mmap_file+0x143/0x180 [ 23.546577] vm_mmap_pgoff+0x241/0x280 [ 23.550432] ? vma_is_stack_for_current+0xa0/0xa0 [ 23.555241] ? putname+0xee/0x130 [ 23.558661] ? rcu_read_lock_sched_held+0x108/0x120 [ 23.563642] ? kmem_cache_free+0x267/0x2a0 [ 23.567849] SyS_mmap_pgoff+0x462/0x5f0 [ 23.571792] ? find_mergeable_anon_vma+0xd0/0xd0 [ 23.576512] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.581500] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 23.586232] SyS_mmap+0x16/0x20 [ 23.589477] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 23.594196] RIP: 0033:0x449269 [ 23.597353] RSP: 002b:00007f1d8d0aad98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 23.605027] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449269 [ 23.612265] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 23.619502] RBP: 0000000000000000 R08: 000000000000000a R09: 0000000000000000 [ 23.626738] R10: 0000000000008011 R11: 0000000000000212 R12: 00000000006dac20 [ 23.633973] R13: 6273752f7665642f R14: 00007f1d8d0ab9c0 R15: 0000000000000005 [ 23.641216] 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 eb f2 96 fd 48 c7 c6 20 1f d1 85 4c 89 ff e8 8c b4 c0 fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 c7 f2 96 fd [ 23.660287] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c8407510 [ 23.666821] ---[ end trace 9d8036274b0f9d42 ]--- [ 23.671558] Kernel panic - not syncing: Fatal exception [ 23.677263] Dumping ftrace buffer: [ 23.680767] (ftrace buffer empty) [ 23.684443] Kernel Offset: disabled [ 23.688037] Rebooting in 86400 seconds..