[....] Starting enhanced syslogd: rsyslogd[ 9.974680] audit: type=1400 audit(1514304537.178:5): 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 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: [ 12.691797] audit: type=1400 audit(1514304539.895:6): avc: denied { map } for pid=3137 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-mmots-kasan-gce-9,10.128.0.45' (ECDSA) to the list of known hosts. executing program executing program executing program executing program [ 18.838093] audit: type=1400 audit(1514304546.041:7): avc: denied { map } for pid=3151 comm="syzkaller757651" path="/root/syzkaller757651992" 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 [ 18.864083] audit: type=1400 audit(1514304546.042:8): avc: denied { map } for pid=3151 comm="syzkaller757651" path="/dev/usbmon0" dev="devtmpfs" ino=1081 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 [ 18.897805] page:ffffea000723fc00 count:0 mapcount:0 mapping: (null) index:0x0 [ 18.906085] flags: 0x2fffc0000000000() [ 18.909986] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 18.917912] raw: ffffea000727d4e0 ffffea000730b2e0 0000000000000000 0000000000000000 [ 18.925818] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 18.932911] ------------[ cut here ]------------ [ 18.937634] kernel BUG at ./include/linux/mm.h:844! [ 18.942665] invalid opcode: 0000 [#1] SMP KASAN [ 18.947318] Dumping ftrace buffer: [ 18.950823] (ftrace buffer empty) [ 18.954497] Modules linked in: [ 18.957662] CPU: 1 PID: 3152 Comm: syzkaller757651 Not tainted 4.15.0-rc4-mm1+ #49 [ 18.965329] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 18.974657] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 18.979637] RSP: 0018:ffff8801cb0af510 EFLAGS: 00010203 [ 18.984965] RAX: 0000000000000000 RBX: 1ffff10039615ea4 RCX: 0000000000000000 [ 18.992199] RDX: 0000000000000000 RSI: 1ffff10039615dee RDI: ffffed0039615e90 [ 18.999437] RBP: ffff8801cb0af5e8 R08: 1ffff10039615db0 R09: 0000000000000000 [ 19.006671] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10039615ea8 [ 19.013908] R13: dffffc0000000000 R14: ffff8801cb0af840 R15: ffffea000723fc00 [ 19.021149] FS: 00007f49b1386700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 19.029339] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 19.035188] CR2: 000055cfb39ce0b8 CR3: 00000001ccb19003 CR4: 00000000001606e0 [ 19.042431] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 19.049669] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 19.056905] Call Trace: [ 19.059473] ? mon_alloc_buff+0x1a0/0x1a0 [ 19.063588] ? find_held_lock+0x35/0x1d0 [ 19.067625] __do_fault+0xeb/0x30f [ 19.071130] ? vma_gap_callbacks_rotate+0x62/0x80 [ 19.075937] ? pte_offset_kernel+0xc7/0xc7 [ 19.080137] ? print_irqtrace_events+0x270/0x270 [ 19.084859] ? rb_insert_color_cached+0x1660/0x1660 [ 19.089843] ? vma_compute_subtree_gap+0x200/0x200 [ 19.094740] ? rb_insert_color_cached+0x1660/0x1660 [ 19.099722] ? check_noncircular+0x20/0x20 [ 19.103928] __handle_mm_fault+0x1d8f/0x3ce0 [ 19.108305] ? __pmd_alloc+0x4e0/0x4e0 [ 19.112160] ? find_held_lock+0x35/0x1d0 [ 19.116189] ? handle_mm_fault+0x2a0/0x930 [ 19.120388] ? lock_downgrade+0x980/0x980 [ 19.124512] handle_mm_fault+0x38f/0x930 [ 19.128539] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 19.133089] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 19.138941] ? find_vma+0x30/0x150 [ 19.142449] __get_user_pages+0x50c/0x15f0 [ 19.146655] ? follow_page_mask+0x17f0/0x17f0 [ 19.151114] ? vma_link+0xe9/0x170 [ 19.154624] ? lock_acquire+0x1d5/0x580 [ 19.158564] ? lock_acquire+0x1d5/0x580 [ 19.162506] ? __mm_populate+0x2c7/0x450 [ 19.166537] ? lock_release+0xa40/0xa40 [ 19.170479] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 19.176334] ? rcu_note_context_switch+0x710/0x710 [ 19.181235] populate_vma_page_range+0x20e/0x2f0 [ 19.185958] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 19.190851] ? vmacache_find+0x5f/0x280 [ 19.194795] ? vmacache_update+0xfe/0x130 [ 19.198913] ? find_vma+0x30/0x150 [ 19.202420] __mm_populate+0x23a/0x450 [ 19.206275] ? populate_vma_page_range+0x2f0/0x2f0 [ 19.211170] ? down_read_killable+0x180/0x180 [ 19.215633] ? security_mmap_file+0x143/0x180 [ 19.220097] vm_mmap_pgoff+0x241/0x280 [ 19.223953] ? vma_is_stack_for_current+0xa0/0xa0 [ 19.228760] ? putname+0xee/0x130 [ 19.232181] ? rcu_read_lock_sched_held+0x108/0x120 [ 19.237164] ? kmem_cache_free+0x267/0x2a0 [ 19.241368] SyS_mmap_pgoff+0x462/0x5f0 [ 19.245312] ? find_mergeable_anon_vma+0xd0/0xd0 [ 19.250042] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 19.255034] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 19.259770] SyS_mmap+0x16/0x20 [ 19.263027] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 19.267750] RIP: 0033:0x449249 [ 19.270909] RSP: 002b:00007f49b1385d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 19.278580] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449249 [ 19.285816] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 19.293050] RBP: 0000000000000000 R08: 000000000000000b R09: 0000000000000000 [ 19.300284] R10: 0000000000008011 R11: 0000000000000212 R12: 00000000006dac20 [ 19.307519] R13: 6273752f7665642f R14: 00007f49b13869c0 R15: 0000000000000005 [ 19.314773] 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 db e1 96 fd 48 c7 c6 80 1f d1 85 4c 89 ff e8 6c a3 c0 fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 b7 e1 96 fd [ 19.333843] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801cb0af510 [ 19.340364] ---[ end trace 8ea221790b36af86 ]--- [ 19.345317] Kernel panic - not syncing: Fatal exception [ 19.351051] Dumping ftrace buffer: [ 19.354560] (ftrace buffer empty) [ 19.358237] Kernel Offset: disabled [ 19.361835] Rebooting in 86400 seconds..