[....] Starting enhanced syslogd: rsyslogd[ 10.630501] audit: type=1400 audit(1514193312.570:5): avc: denied { syslog } for pid=2994 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: [ 13.055175] audit: type=1400 audit(1514193314.994:6): avc: denied { map } for pid=3133 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-4,10.128.0.37' (ECDSA) to the list of known hosts. [ 31.997048] audit: type=1400 audit(1514193333.936:7): avc: denied { map } for pid=3151 comm="syzkaller331842" path="/root/syzkaller331842673" 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 net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 executing program executing program [ 32.140557] audit: type=1400 audit(1514193334.080:8): avc: denied { map } for pid=3152 comm="syzkaller331842" path="/dev/usbmon0" dev="devtmpfs" ino=1071 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 [ 32.177434] page:0000000036ba8723 count:0 mapcount:0 mapping: (null) index:0x0 [ 32.185690] flags: 0x2fffc0000000000() [ 32.189610] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 32.197493] raw: ffffea00071f36e0 ffffea00071f7620 0000000000000000 0000000000000000 [ 32.205384] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 32.212482] ------------[ cut here ]------------ [ 32.217207] kernel BUG at ./include/linux/mm.h:844! [ 32.222236] invalid opcode: 0000 [#1] SMP KASAN [ 32.226872] Dumping ftrace buffer: [ 32.230375] (ftrace buffer empty) [ 32.234052] Modules linked in: [ 32.237214] CPU: 0 PID: 3169 Comm: syzkaller331842 Not tainted 4.15.0-rc5+ #237 [ 32.244631] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.253963] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 32.258945] RSP: 0018:ffff8801c8247510 EFLAGS: 00010203 [ 32.264276] RAX: 0000000000000000 RBX: 1ffff10039048ea4 RCX: 0000000000000000 [ 32.271515] RDX: 0000000000000000 RSI: 1ffff10039048dee RDI: ffffed0039048e90 [ 32.278758] RBP: ffff8801c82475e8 R08: 1ffff10039048db0 R09: 0000000000000000 [ 32.285993] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10039048ea8 [ 32.293230] R13: dffffc0000000000 R14: ffff8801c8247840 R15: ffffea000720ff40 [ 32.300467] FS: 00007fdd961ee700(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 32.308656] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 32.314504] CR2: 0000000020fb1000 CR3: 00000001bd1d9004 CR4: 00000000001606f0 [ 32.321749] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 32.328985] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 32.336224] Call Trace: [ 32.338782] ? mon_alloc_buff+0x1a0/0x1a0 [ 32.342898] ? finish_fault+0x1b4/0x2a0 [ 32.346841] ? lock_downgrade+0x980/0x980 [ 32.350954] ? do_swap_page+0x2c50/0x2c50 [ 32.355077] __do_fault+0xeb/0x30f [ 32.358588] ? pte_offset_kernel+0xc7/0xc7 [ 32.362794] ? check_noncircular+0x20/0x20 [ 32.366993] ? _raw_spin_unlock+0x22/0x30 [ 32.371109] __handle_mm_fault+0x1d8f/0x3ce0 [ 32.375493] ? __pmd_alloc+0x4e0/0x4e0 [ 32.379347] ? __save_stack_trace+0x7e/0xd0 [ 32.383637] ? find_held_lock+0x35/0x1d0 [ 32.387665] ? handle_mm_fault+0x248/0x8d0 [ 32.391864] ? lock_downgrade+0x980/0x980 [ 32.395989] handle_mm_fault+0x334/0x8d0 [ 32.400023] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 32.404570] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 32.410419] ? find_vma+0x30/0x150 [ 32.413930] __get_user_pages+0x50c/0x15f0 [ 32.418136] ? follow_page_mask+0x17f0/0x17f0 [ 32.422599] ? lock_acquire+0x1d5/0x580 [ 32.426545] ? lock_acquire+0x1d5/0x580 [ 32.430484] ? __mm_populate+0x2c7/0x450 [ 32.434513] ? lock_release+0xa40/0xa40 [ 32.438461] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 32.444313] ? rcu_note_context_switch+0x710/0x710 [ 32.449217] populate_vma_page_range+0x20e/0x2f0 [ 32.453939] ? get_user_pages+0xc0/0xc0 [ 32.457879] ? vmacache_find+0x5f/0x280 [ 32.461818] ? vmacache_update+0xfe/0x130 [ 32.465932] ? find_vma+0x30/0x150 [ 32.469438] __mm_populate+0x23a/0x450 [ 32.473291] ? populate_vma_page_range+0x2f0/0x2f0 [ 32.478187] ? down_read_killable+0x180/0x180 [ 32.482650] ? security_mmap_file+0x143/0x180 [ 32.487113] vm_mmap_pgoff+0x241/0x280 [ 32.490969] ? vma_is_stack_for_current+0xa0/0xa0 [ 32.495779] ? lock_release+0xa40/0xa40 [ 32.499735] SyS_mmap_pgoff+0x462/0x5f0 [ 32.503676] ? find_mergeable_anon_vma+0xd0/0xd0 [ 32.508396] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 32.513841] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 32.518563] SyS_mmap+0x16/0x20 [ 32.521812] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 32.526533] RIP: 0033:0x44b3b9 [ 32.529687] RSP: 002b:00007fdd961edcd8 EFLAGS: 00000216 ORIG_RAX: 0000000000000009 [ 32.537356] RAX: ffffffffffffffda RBX: 00000000006ddc24 RCX: 000000000044b3b9 [ 32.544592] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 32.551828] RBP: 00000000006ddc20 R08: 0000000000000008 R09: 0000000000000000 [ 32.559060] R10: 0000000000008011 R11: 0000000000000216 R12: 0000000000000000 [ 32.566294] R13: 00007ffc59a07c3f R14: 00007fdd961ee9c0 R15: 000000000000000b [ 32.573535] 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 [ 32.592595] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c8247510 [ 32.599213] ---[ end trace aafa6443e75cf998 ]--- [ 32.604055] Kernel panic - not syncing: Fatal exception [ 32.609450] Dumping ftrace buffer: [ 32.612965] (ftrace buffer empty) [ 32.616648] Kernel Offset: disabled [ 32.620247] Rebooting in 86400 seconds..