[....] Starting enhanced syslogd: rsyslogd[ 11.641730] audit: type=1400 audit(1514299220.371:5): avc: denied { syslog } for pid=2993 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: [ 18.550778] audit: type=1400 audit(1514299227.280:6): avc: denied { map } for pid=3134 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-6,10.128.0.94' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program [ 24.746111] audit: type=1400 audit(1514299233.475:7): avc: denied { map } for pid=3149 comm="syzkaller208559" path="/root/syzkaller208559817" 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 [ 24.772150] audit: type=1400 audit(1514299233.476:8): avc: denied { map } for pid=3149 comm="syzkaller208559" path="/dev/usbmon0" dev="devtmpfs" ino=1070 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 [ 24.803164] page:00000000b2772d49 count:0 mapcount:0 mapping: (null) index:0x0 [ 24.811378] flags: 0x2fffc0000000000() [ 24.815373] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 24.823261] raw: ffffea0007277260 ffffea00072357e0 0000000000000000 0000000000000000 [ 24.831141] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 24.838231] ------------[ cut here ]------------ [ 24.842951] kernel BUG at ./include/linux/mm.h:844! [ 24.847968] invalid opcode: 0000 [#1] SMP KASAN [ 24.852606] Dumping ftrace buffer: [ 24.856108] (ftrace buffer empty) [ 24.859785] Modules linked in: [ 24.862946] CPU: 0 PID: 3150 Comm: syzkaller208559 Not tainted 4.15.0-rc5+ #237 [ 24.870355] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.879687] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 24.884665] RSP: 0018:ffff8801c8fb7510 EFLAGS: 00010203 [ 24.890000] RAX: 0000000000000000 RBX: 1ffff100391f6ea4 RCX: 0000000000000000 [ 24.897238] RDX: 0000000000000000 RSI: 1ffff100391f6dee RDI: ffffed00391f6e90 [ 24.904474] RBP: ffff8801c8fb75e8 R08: 1ffff100391f6db0 R09: 0000000000000000 [ 24.911721] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff100391f6ea8 [ 24.918958] R13: dffffc0000000000 R14: ffff8801c8fb7840 R15: ffffea0007235780 [ 24.926194] FS: 00007f141d782700(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 24.934385] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.940234] CR2: 00000000208be000 CR3: 00000001c8ddb001 CR4: 00000000001606f0 [ 24.947470] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.954704] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.961941] Call Trace: [ 24.964497] ? mon_alloc_buff+0x1a0/0x1a0 [ 24.968616] ? find_held_lock+0x35/0x1d0 [ 24.972650] __do_fault+0xeb/0x30f [ 24.976157] ? vma_gap_callbacks_rotate+0x62/0x80 [ 24.980963] ? pte_offset_kernel+0xc7/0xc7 [ 24.985170] ? print_irqtrace_events+0x270/0x270 [ 24.990328] ? rb_insert_color_cached+0x1660/0x1660 [ 24.995309] ? vma_compute_subtree_gap+0x200/0x200 [ 25.000215] ? check_noncircular+0x20/0x20 [ 25.004419] __handle_mm_fault+0x1d8f/0x3ce0 [ 25.008797] ? __pmd_alloc+0x4e0/0x4e0 [ 25.012653] ? __save_stack_trace+0x7e/0xd0 [ 25.016942] ? find_held_lock+0x35/0x1d0 [ 25.020973] ? handle_mm_fault+0x248/0x8d0 [ 25.025176] ? lock_downgrade+0x980/0x980 [ 25.029300] handle_mm_fault+0x334/0x8d0 [ 25.033337] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 25.037888] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.043740] ? find_vma+0x30/0x150 [ 25.047250] __get_user_pages+0x50c/0x15f0 [ 25.051458] ? follow_page_mask+0x17f0/0x17f0 [ 25.055937] ? lock_acquire+0x1d5/0x580 [ 25.059877] ? lock_acquire+0x1d5/0x580 [ 25.063823] ? __mm_populate+0x2c7/0x450 [ 25.067854] ? lock_release+0xa40/0xa40 [ 25.071795] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.077646] ? rcu_note_context_switch+0x710/0x710 [ 25.082542] populate_vma_page_range+0x20e/0x2f0 [ 25.087265] ? get_user_pages+0xc0/0xc0 [ 25.091206] ? vmacache_find+0x5f/0x280 [ 25.095145] ? vmacache_update+0xfe/0x130 [ 25.099443] ? find_vma+0x30/0x150 [ 25.102965] __mm_populate+0x23a/0x450 [ 25.106833] ? populate_vma_page_range+0x2f0/0x2f0 [ 25.111730] ? down_read_killable+0x180/0x180 [ 25.116192] ? security_mmap_file+0x143/0x180 [ 25.120657] vm_mmap_pgoff+0x241/0x280 [ 25.124513] ? vma_is_stack_for_current+0xa0/0xa0 [ 25.129320] ? putname+0xee/0x130 [ 25.132739] ? rcu_read_lock_sched_held+0x108/0x120 [ 25.137721] ? kmem_cache_free+0x267/0x2a0 [ 25.141926] SyS_mmap_pgoff+0x462/0x5f0 [ 25.145867] ? find_mergeable_anon_vma+0xd0/0xd0 [ 25.150594] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.155578] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 25.160322] SyS_mmap+0x16/0x20 [ 25.163568] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 25.168290] RIP: 0033:0x449249 [ 25.171449] RSP: 002b:00007f141d781d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 25.179122] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449249 [ 25.186359] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 25.193594] RBP: 0000000000000000 R08: 000000000000000c R09: 0000000000000000 [ 25.200830] R10: 0000000000008011 R11: 0000000000000212 R12: 00000000006dac20 [ 25.208066] R13: 6273752f7665642f R14: 00007f141d7829c0 R15: 0000000000000005 [ 25.215308] 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 [ 25.234372] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c8fb7510 [ 25.240901] ---[ end trace 806da4839a2bd1f0 ]--- [ 25.245640] Kernel panic - not syncing: Fatal exception [ 25.251355] Dumping ftrace buffer: [ 25.254866] (ftrace buffer empty) [ 25.258547] Kernel Offset: disabled [ 25.262146] Rebooting in 86400 seconds..