[....] Starting enhanced syslogd: rsyslogd[ 11.229596] audit: type=1400 audit(1514263404.479:5): avc: denied { syslog } for pid=2987 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: [ 16.677202] audit: type=1400 audit(1514263409.926:6): avc: denied { map } for pid=3126 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-1,10.128.0.44' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 22.901034] audit: type=1400 audit(1514263416.150:7): avc: denied { map } for pid=3140 comm="syzkaller031174" path="/root/syzkaller031174587" 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 [ 22.927129] audit: type=1400 audit(1514263416.154:8): avc: denied { map } for pid=3140 comm="syzkaller031174" path="/dev/usbmon0" dev="devtmpfs" ino=8867 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 [ 22.955426] page:00000000ff8071d8 count:0 mapcount:0 mapping: (null) index:0x0 [ 22.963790] flags: 0x2fffc0000000000() [ 22.967804] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 22.975721] raw: ffffea000728b420 ffffea0007269260 0000000000000000 0000000000000000 [ 22.983599] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 22.990692] ------------[ cut here ]------------ [ 22.995421] kernel BUG at ./include/linux/mm.h:844! [ 23.000446] invalid opcode: 0000 [#1] SMP KASAN [ 23.005082] Dumping ftrace buffer: [ 23.008588] (ftrace buffer empty) [ 23.012270] Modules linked in: [ 23.015432] CPU: 1 PID: 3141 Comm: syzkaller031174 Not tainted 4.15.0-rc5+ #237 [ 23.022839] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.032165] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 23.037144] RSP: 0018:ffff8801c8a47510 EFLAGS: 00010203 [ 23.042469] RAX: 0000000000000000 RBX: 1ffff10039148ea4 RCX: 0000000000000000 [ 23.049702] RDX: 0000000000000000 RSI: 1ffff10039148dee RDI: ffffed0039148e90 [ 23.056937] RBP: ffff8801c8a475e8 R08: 1ffff10039148db0 R09: 0000000000000000 [ 23.064177] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10039148ea8 [ 23.071412] R13: dffffc0000000000 R14: ffff8801c8a47840 R15: ffffea0006f32b00 [ 23.078647] FS: 00007f2b49271700(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 [ 23.086837] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.092685] CR2: 00000000208be000 CR3: 00000001c9af1005 CR4: 00000000001606e0 [ 23.099925] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.107247] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.114481] Call Trace: [ 23.117050] ? mon_alloc_buff+0x1a0/0x1a0 [ 23.121166] ? finish_fault+0x1b4/0x2a0 [ 23.125107] ? lock_downgrade+0x980/0x980 [ 23.129225] ? do_swap_page+0x2c50/0x2c50 [ 23.133338] __do_fault+0xeb/0x30f [ 23.136845] ? pte_offset_kernel+0xc7/0xc7 [ 23.141047] ? check_noncircular+0x20/0x20 [ 23.145245] ? _raw_spin_unlock+0x22/0x30 [ 23.149359] __handle_mm_fault+0x1d8f/0x3ce0 [ 23.153736] ? __pmd_alloc+0x4e0/0x4e0 [ 23.157594] ? __save_stack_trace+0x7e/0xd0 [ 23.161882] ? find_held_lock+0x35/0x1d0 [ 23.165910] ? handle_mm_fault+0x248/0x8d0 [ 23.170107] ? lock_downgrade+0x980/0x980 [ 23.174228] handle_mm_fault+0x334/0x8d0 [ 23.178254] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 23.182799] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.188646] ? find_vma+0x30/0x150 [ 23.192154] __get_user_pages+0x50c/0x15f0 [ 23.196358] ? follow_page_mask+0x17f0/0x17f0 [ 23.200827] ? lock_acquire+0x1d5/0x580 [ 23.204764] ? lock_acquire+0x1d5/0x580 [ 23.208701] ? __mm_populate+0x2c7/0x450 [ 23.212732] ? lock_release+0xa40/0xa40 [ 23.216672] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.222528] ? rcu_note_context_switch+0x710/0x710 [ 23.227424] populate_vma_page_range+0x20e/0x2f0 [ 23.232149] ? get_user_pages+0xc0/0xc0 [ 23.236088] ? vmacache_find+0x5f/0x280 [ 23.240024] ? vmacache_update+0xfe/0x130 [ 23.244136] ? find_vma+0x30/0x150 [ 23.247640] __mm_populate+0x23a/0x450 [ 23.251497] ? populate_vma_page_range+0x2f0/0x2f0 [ 23.256392] ? down_read_killable+0x180/0x180 [ 23.260851] ? security_mmap_file+0x143/0x180 [ 23.265318] vm_mmap_pgoff+0x241/0x280 [ 23.269174] ? vma_is_stack_for_current+0xa0/0xa0 [ 23.273983] ? putname+0xee/0x130 [ 23.277405] ? rcu_read_lock_sched_held+0x108/0x120 [ 23.282392] ? kmem_cache_free+0x267/0x2a0 [ 23.286598] SyS_mmap_pgoff+0x462/0x5f0 [ 23.290538] ? find_mergeable_anon_vma+0xd0/0xd0 [ 23.295260] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.300241] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 23.304962] SyS_mmap+0x16/0x20 [ 23.308204] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 23.312924] RIP: 0033:0x449339 [ 23.316078] RSP: 002b:00007f2b49270d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 23.323750] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449339 [ 23.330983] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 23.338216] RBP: 00000000006dac20 R08: 0000000000000032 R09: 0000000000000000 [ 23.345449] R10: 0000000000008011 R11: 0000000000000212 R12: 747865746e6f632f [ 23.352694] R13: 78756e696c65732f R14: 6273752f7665642f R15: 0000000000000009 [ 23.359943] 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 [ 23.379002] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c8a47510 [ 23.385533] ---[ end trace 9df66d57c1010358 ]--- [ 23.390551] Kernel panic - not syncing: Fatal exception [ 23.396258] Dumping ftrace buffer: [ 23.399776] (ftrace buffer empty) [ 23.403472] Kernel Offset: disabled [ 23.407064] Rebooting in 86400 seconds..