[....] Starting enhanced syslogd: rsyslogd[ 10.597120] audit: type=1400 audit(1514298097.721:5): avc: denied { syslog } for pid=2992 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: [ 15.696669] audit: type=1400 audit(1514298102.821:6): avc: denied { map } for pid=3132 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-next-kasan-gce-2,10.128.0.28' (ECDSA) to the list of known hosts. executing program executing program [ 21.902433] audit: type=1400 audit(1514298109.027:7): avc: denied { map } for pid=3146 comm="syzkaller439828" path="/root/syzkaller439828860" 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 executing program executing program executing program [ 21.928968] audit: type=1400 audit(1514298109.027:8): avc: denied { map } for pid=3146 comm="syzkaller439828" path="/dev/usbmon0" dev="devtmpfs" ino=8958 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 executing program executing program executing program executing program executing program executing program executing program executing program [ 22.044733] page:00000000b94785f1 count:0 mapcount:0 mapping: (null) index:0x0 [ 22.052977] flags: 0x2fffc0000000000() [ 22.056908] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 22.064832] raw: ffffea0007501960 ffffea000726bde0 0000000000000000 0000000000000000 [ 22.072755] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 22.079865] ------------[ cut here ]------------ [ 22.084593] kernel BUG at ./include/linux/mm.h:844! [ 22.089621] invalid opcode: 0000 [#1] SMP KASAN [ 22.094267] Dumping ftrace buffer: [ 22.097779] (ftrace buffer empty) [ 22.101460] Modules linked in: [ 22.104622] CPU: 1 PID: 3147 Comm: syzkaller439828 Not tainted 4.15.0-rc4-next-20171221+ #78 [ 22.113159] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 22.122486] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 22.127464] RSP: 0018:ffff8801c8fe7510 EFLAGS: 00010203 [ 22.132795] RAX: 0000000000000000 RBX: 1ffff100391fcea4 RCX: 0000000000000000 [ 22.140032] RDX: 0000000000000000 RSI: 1ffff100391fcdee RDI: ffffed00391fce90 [ 22.147267] RBP: ffff8801c8fe75e8 R08: 1ffff100391fcdb0 R09: 0000000000000000 [ 22.154502] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff100391fcea8 [ 22.161735] R13: dffffc0000000000 R14: ffff8801c8fe7840 R15: ffffea000725e740 [ 22.168972] FS: 00007fcb70a13700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 22.177163] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.183015] CR2: 00000000205e4ff3 CR3: 00000001cb9e4005 CR4: 00000000001606e0 [ 22.190254] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.197490] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.204726] Call Trace: [ 22.207289] ? mon_alloc_buff+0x1a0/0x1a0 [ 22.211404] ? finish_fault+0x1b4/0x2a0 [ 22.215343] ? lock_downgrade+0x980/0x980 [ 22.219457] ? do_swap_page+0x2a10/0x2a10 [ 22.223572] __do_fault+0xeb/0x30f [ 22.227077] ? pte_offset_kernel+0xc7/0xc7 [ 22.231277] ? vma_compute_subtree_gap+0x200/0x200 [ 22.236171] ? check_noncircular+0x20/0x20 [ 22.240370] ? _raw_spin_unlock+0x22/0x30 [ 22.244484] __handle_mm_fault+0x1d8f/0x3ce0 [ 22.248858] ? __pmd_alloc+0x4e0/0x4e0 [ 22.252714] ? find_held_lock+0x35/0x1d0 [ 22.256746] ? handle_mm_fault+0x2a0/0x930 [ 22.260944] ? lock_downgrade+0x980/0x980 [ 22.265068] handle_mm_fault+0x38f/0x930 [ 22.269096] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 22.273650] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 22.279502] ? find_vma+0x30/0x150 [ 22.283018] __get_user_pages+0x50c/0x15f0 [ 22.287228] ? follow_page_mask+0x17f0/0x17f0 [ 22.291690] ? vma_link+0xe9/0x170 [ 22.295198] ? lock_acquire+0x1d5/0x580 [ 22.299136] ? lock_acquire+0x1d5/0x580 [ 22.303075] ? __mm_populate+0x2c7/0x450 [ 22.307103] ? lock_release+0xa40/0xa40 [ 22.311044] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 22.316895] ? rcu_note_context_switch+0x710/0x710 [ 22.321794] populate_vma_page_range+0x20e/0x2f0 [ 22.326516] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 22.331407] ? vmacache_find+0x5f/0x280 [ 22.335343] ? vmacache_update+0xfe/0x130 [ 22.339456] ? find_vma+0x30/0x150 [ 22.342960] __mm_populate+0x23a/0x450 [ 22.346812] ? populate_vma_page_range+0x2f0/0x2f0 [ 22.351718] ? down_read_killable+0x180/0x180 [ 22.356184] ? security_mmap_file+0x143/0x180 [ 22.360656] vm_mmap_pgoff+0x241/0x280 [ 22.364516] ? vma_is_stack_for_current+0xa0/0xa0 [ 22.369338] ? selinux_capable+0x40/0x40 [ 22.373371] SyS_mmap_pgoff+0x462/0x5f0 [ 22.377313] ? find_mergeable_anon_vma+0xd0/0xd0 [ 22.382039] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 22.387027] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 22.391751] SyS_mmap+0x16/0x20 [ 22.394999] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 22.399724] RIP: 0033:0x449529 [ 22.402883] RSP: 002b:00007fcb70a12d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 22.410553] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449529 [ 22.417788] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 22.425026] RBP: 00000000006dac20 R08: 0000000000000035 R09: 0000000000000000 [ 22.432261] R10: 0000000000008011 R11: 0000000000000212 R12: 977e79a25a843e8f [ 22.439496] R13: 6273752f7665642f R14: 74656e2f7665642f R15: 000000000000000b [ 22.446741] 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 eb f2 96 fd 48 c7 c6 20 1f d1 85 4c 89 ff e8 8c b4 c0 fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 c7 f2 96 fd [ 22.465807] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c8fe7510 [ 22.472324] ---[ end trace 4fde6e517ea36f73 ]--- [ 22.477224] Kernel panic - not syncing: Fatal exception [ 22.482944] Dumping ftrace buffer: [ 22.486451] (ftrace buffer empty) [ 22.490128] Kernel Offset: disabled [ 22.493725] Rebooting in 86400 seconds..