[....] Starting enhanced syslogd: rsyslogd[ 10.836114] audit: type=1400 audit(1514376778.514:5): avc: denied { syslog } for pid=2991 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: [ 17.843592] audit: type=1400 audit(1514376785.522:6): avc: denied { map } for pid=3130 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 '10.128.15.247' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program [ 37.715398] audit: type=1400 audit(1514376805.394:7): avc: denied { map } for pid=3148 comm="syzkaller975886" path="/root/syzkaller975886447" 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 [ 37.741591] audit: type=1400 audit(1514376805.409:8): avc: denied { map } for pid=3148 comm="syzkaller975886" path="/dev/usbmon0" dev="devtmpfs" ino=1124 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 [ 37.797390] page:0000000070a9148c count:0 mapcount:0 mapping: (null) index:0x0 [ 37.805627] flags: 0x2fffc0000000000() [ 37.809532] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 37.817414] raw: ffffea00072d5720 ffffea0007221b60 0000000000000000 0000000000000000 [ 37.825294] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 37.832378] ------------[ cut here ]------------ [ 37.837105] kernel BUG at ./include/linux/mm.h:844! [ 37.842134] invalid opcode: 0000 [#1] SMP KASAN [ 37.846778] Dumping ftrace buffer: [ 37.850283] (ftrace buffer empty) [ 37.853962] Modules linked in: [ 37.857126] CPU: 0 PID: 3149 Comm: syzkaller975886 Not tainted 4.15.0-rc5+ #238 [ 37.864543] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.873872] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 37.878850] RSP: 0018:ffff8801c8a3f510 EFLAGS: 00010203 [ 37.884180] RAX: 0000000000000000 RBX: 1ffff10039147ea4 RCX: 0000000000000000 [ 37.891415] RDX: 0000000000000000 RSI: 1ffff10039147dee RDI: ffffed0039147e90 [ 37.898649] RBP: ffff8801c8a3f5e8 R08: 1ffff10039147db0 R09: 0000000000000000 [ 37.905884] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10039147ea8 [ 37.913118] R13: dffffc0000000000 R14: ffff8801c8a3f840 R15: ffffea0007221b00 [ 37.920354] FS: 00007fd038511700(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 37.928543] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.934390] CR2: 00000000208be000 CR3: 00000001c88d6002 CR4: 00000000001606f0 [ 37.941626] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.948861] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.956095] Call Trace: [ 37.958662] ? mon_alloc_buff+0x1a0/0x1a0 [ 37.962795] ? find_held_lock+0x35/0x1d0 [ 37.966830] __do_fault+0xeb/0x30f [ 37.970422] ? vma_gap_callbacks_rotate+0x62/0x80 [ 37.975229] ? pte_offset_kernel+0xc7/0xc7 [ 37.979428] ? print_irqtrace_events+0x270/0x270 [ 37.984151] ? rb_insert_color_cached+0x1660/0x1660 [ 37.989132] ? vma_compute_subtree_gap+0x200/0x200 [ 37.994036] ? check_noncircular+0x20/0x20 [ 37.998238] __handle_mm_fault+0x1d8f/0x3ce0 [ 38.002613] ? __pmd_alloc+0x4e0/0x4e0 [ 38.006473] ? __save_stack_trace+0x7e/0xd0 [ 38.010764] ? find_held_lock+0x35/0x1d0 [ 38.014795] ? handle_mm_fault+0x248/0x8d0 [ 38.018993] ? lock_downgrade+0x980/0x980 [ 38.023116] handle_mm_fault+0x334/0x8d0 [ 38.027143] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 38.031690] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 38.037538] ? find_vma+0x30/0x150 [ 38.041133] __get_user_pages+0x50c/0x15f0 [ 38.045338] ? follow_page_mask+0x17f0/0x17f0 [ 38.049803] ? lock_acquire+0x1d5/0x580 [ 38.053746] ? lock_acquire+0x1d5/0x580 [ 38.057685] ? __mm_populate+0x2c7/0x450 [ 38.061714] ? lock_release+0xa40/0xa40 [ 38.065652] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 38.071503] ? rcu_note_context_switch+0x710/0x710 [ 38.076401] populate_vma_page_range+0x20e/0x2f0 [ 38.081122] ? get_user_pages+0xc0/0xc0 [ 38.085070] ? vmacache_find+0x5f/0x280 [ 38.089015] ? vmacache_update+0xfe/0x130 [ 38.093130] ? find_vma+0x30/0x150 [ 38.096636] __mm_populate+0x23a/0x450 [ 38.100490] ? populate_vma_page_range+0x2f0/0x2f0 [ 38.105383] ? down_read_killable+0x180/0x180 [ 38.109845] ? security_mmap_file+0x143/0x180 [ 38.114308] vm_mmap_pgoff+0x241/0x280 [ 38.118163] ? vma_is_stack_for_current+0xa0/0xa0 [ 38.122970] ? putname+0xee/0x130 [ 38.126406] ? rcu_read_lock_sched_held+0x108/0x120 [ 38.131390] ? kmem_cache_free+0x267/0x2a0 [ 38.135605] SyS_mmap_pgoff+0x462/0x5f0 [ 38.139547] ? find_mergeable_anon_vma+0xd0/0xd0 [ 38.144269] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 38.149252] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 38.153975] SyS_mmap+0x16/0x20 [ 38.157220] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 38.161940] RIP: 0033:0x449249 [ 38.165095] RSP: 002b:00007fd038510d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 38.172766] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449249 [ 38.180001] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 38.187239] RBP: 0000000000000000 R08: 0000000000000011 R09: 0000000000000000 [ 38.194473] R10: 0000000000008011 R11: 0000000000000212 R12: 00000000006dac20 [ 38.201708] R13: 6273752f7665642f R14: 00007fd0385119c0 R15: 0000000000000005 [ 38.208950] 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 [ 38.228023] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c8a3f510 [ 38.234554] ---[ end trace 5fdc2ef0f606458d ]--- [ 38.239448] Kernel panic - not syncing: Fatal exception [ 38.245169] Dumping ftrace buffer: [ 38.248683] (ftrace buffer empty) [ 38.252360] Kernel Offset: disabled [ 38.255954] Rebooting in 86400 seconds..