[....] Starting enhanced syslogd: rsyslogd[ 11.395616] audit: type=1400 audit(1514350931.236:5): avc: denied { syslog } for pid=3002 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 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: [ 18.205626] audit: type=1400 audit(1514350938.046:6): avc: denied { map } for pid=3144 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-3,10.128.0.53' (ECDSA) to the list of known hosts. executing program executing program executing program executing program [ 38.793758] audit: type=1400 audit(1514350958.634:7): avc: denied { map } for pid=3161 comm="syzkaller667550" path="/root/syzkaller667550479" 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 [ 38.820005] audit: type=1400 audit(1514350958.639:8): avc: denied { map } for pid=3161 comm="syzkaller667550" path="/dev/usbmon0" dev="devtmpfs" ino=8939 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 [ 38.852913] page:000000005a1c481b count:0 mapcount:0 mapping: (null) index:0x0 [ 38.861158] flags: 0x2fffc0000000000() [ 38.865093] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 38.872988] raw: ffffea000723b960 ffffea000721ed20 0000000000000000 0000000000000000 [ 38.881051] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 38.888149] ------------[ cut here ]------------ [ 38.892871] kernel BUG at ./include/linux/mm.h:844! [ 38.897902] invalid opcode: 0000 [#1] SMP KASAN [ 38.902538] Dumping ftrace buffer: [ 38.906057] (ftrace buffer empty) [ 38.909734] Modules linked in: [ 38.912892] CPU: 1 PID: 3162 Comm: syzkaller667550 Not tainted 4.15.0-rc5+ #238 [ 38.920301] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.929629] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 38.934608] RSP: 0018:ffff8801c8717510 EFLAGS: 00010203 [ 38.939949] RAX: 0000000000000000 RBX: 1ffff100390e2ea4 RCX: 0000000000000000 [ 38.947183] RDX: 0000000000000000 RSI: 1ffff100390e2dee RDI: ffffed00390e2e90 [ 38.954417] RBP: ffff8801c87175e8 R08: 1ffff100390e2db0 R09: 0000000000000000 [ 38.961660] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff100390e2ea8 [ 38.968907] R13: dffffc0000000000 R14: ffff8801c8717840 R15: ffffea000721ecc0 [ 38.976152] FS: 00007f084283d700(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 [ 38.984790] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.990644] CR2: 00000000208be000 CR3: 00000001cd435004 CR4: 00000000001606e0 [ 38.997882] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 39.005127] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 39.012371] Call Trace: [ 39.014934] ? mon_alloc_buff+0x1a0/0x1a0 [ 39.019047] ? find_held_lock+0x35/0x1d0 [ 39.023082] __do_fault+0xeb/0x30f [ 39.026587] ? vma_gap_callbacks_rotate+0x62/0x80 [ 39.031394] ? pte_offset_kernel+0xc7/0xc7 [ 39.035591] ? print_irqtrace_events+0x270/0x270 [ 39.040319] ? rb_insert_color_cached+0x1660/0x1660 [ 39.045302] ? vma_compute_subtree_gap+0x200/0x200 [ 39.050196] ? check_noncircular+0x20/0x20 [ 39.054396] __handle_mm_fault+0x1d8f/0x3ce0 [ 39.058773] ? __pmd_alloc+0x4e0/0x4e0 [ 39.062640] ? __save_stack_trace+0x7e/0xd0 [ 39.066945] ? find_held_lock+0x35/0x1d0 [ 39.071066] ? handle_mm_fault+0x248/0x8d0 [ 39.075268] ? lock_downgrade+0x980/0x980 [ 39.079393] handle_mm_fault+0x334/0x8d0 [ 39.083419] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 39.088746] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 39.095459] ? find_vma+0x30/0x150 [ 39.098966] __get_user_pages+0x50c/0x15f0 [ 39.103169] ? follow_page_mask+0x17f0/0x17f0 [ 39.107631] ? lock_acquire+0x1d5/0x580 [ 39.111569] ? lock_acquire+0x1d5/0x580 [ 39.115507] ? __mm_populate+0x2c7/0x450 [ 39.119533] ? lock_release+0xa40/0xa40 [ 39.123479] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 39.129333] ? rcu_note_context_switch+0x710/0x710 [ 39.134230] populate_vma_page_range+0x20e/0x2f0 [ 39.138951] ? get_user_pages+0xc0/0xc0 [ 39.142891] ? vmacache_find+0x5f/0x280 [ 39.146829] ? vmacache_update+0xfe/0x130 [ 39.150941] ? find_vma+0x30/0x150 [ 39.154448] __mm_populate+0x23a/0x450 [ 39.158299] ? populate_vma_page_range+0x2f0/0x2f0 [ 39.163193] ? down_read_killable+0x180/0x180 [ 39.167663] ? security_mmap_file+0x143/0x180 [ 39.172142] vm_mmap_pgoff+0x241/0x280 [ 39.176000] ? vma_is_stack_for_current+0xa0/0xa0 [ 39.180806] ? putname+0xee/0x130 [ 39.184222] ? rcu_read_lock_sched_held+0x108/0x120 [ 39.189560] ? kmem_cache_free+0x267/0x2a0 [ 39.193774] SyS_mmap_pgoff+0x462/0x5f0 [ 39.197715] ? find_mergeable_anon_vma+0xd0/0xd0 [ 39.202433] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 39.207414] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 39.212135] SyS_mmap+0x16/0x20 [ 39.215381] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 39.220110] RIP: 0033:0x4493c9 [ 39.223278] RSP: 002b:00007f084283cd98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 39.230956] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 00000000004493c9 [ 39.238190] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 39.245429] RBP: 0000000000000000 R08: 000000000000000a R09: 0000000000000000 [ 39.252665] R10: 0000000000008011 R11: 0000000000000212 R12: 00000000006dac20 [ 39.259899] R13: 6273752f7665642f R14: 00007f084283d9c0 R15: 0000000000000007 [ 39.267146] 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 [ 39.286217] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c8717510 [ 39.292717] ---[ end trace 9be4896bc1121abc ]--- [ 39.297451] Kernel panic - not syncing: Fatal exception [ 39.303437] Dumping ftrace buffer: [ 39.306950] (ftrace buffer empty) [ 39.310645] Kernel Offset: disabled [ 39.314248] Rebooting in 86400 seconds..