[....] Starting enhanced syslogd: rsyslogd[ 9.980083] audit: type=1400 audit(1514377477.808:5): avc: denied { syslog } for pid=2988 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: [ 12.740533] audit: type=1400 audit(1514377480.569:6): avc: denied { map } for pid=3124 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 '10.128.15.202' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program [ 27.867384] audit: type=1400 audit(1514377495.696:7): avc: denied { map } for pid=3141 comm="syzkaller057844" path="/root/syzkaller057844635" 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 [ 27.893382] audit: type=1400 audit(1514377495.696:8): avc: denied { map } for pid=3141 comm="syzkaller057844" path="/dev/usbmon0" dev="devtmpfs" ino=8929 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 [ 27.929816] page:000000003bc9d3cb count:0 mapcount:0 mapping: (null) index:0x0 [ 27.938055] flags: 0x2fffc0000000000() [ 27.941960] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 27.949834] raw: ffffea000731e560 ffffea0007386360 0000000000000000 0000000000000000 [ 27.957714] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 27.964803] ------------[ cut here ]------------ [ 27.969531] kernel BUG at ./include/linux/mm.h:844! [ 27.974563] invalid opcode: 0000 [#1] SMP KASAN [ 27.979200] Dumping ftrace buffer: [ 27.982704] (ftrace buffer empty) [ 27.986382] Modules linked in: [ 27.989542] CPU: 1 PID: 3142 Comm: syzkaller057844 Not tainted 4.15.0-rc5+ #148 [ 27.996955] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.006279] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 28.011262] RSP: 0018:ffff8801c8447388 EFLAGS: 00010203 [ 28.016589] RAX: 0000000000000000 RBX: 1ffff10039088e73 RCX: 0000000000000000 [ 28.023824] RDX: 0000000000000000 RSI: 1ffff10039088dbd RDI: ffffed0039088e60 [ 28.031059] RBP: ffff8801c8447460 R08: 1ffff10039088d7f R09: 0000000000000000 [ 28.038299] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10039088e77 [ 28.045536] R13: dffffc0000000000 R14: ffff8801c84476b8 R15: ffffea000732f840 [ 28.052777] FS: 0000000000000000(0000) GS:ffff8801db500000(0063) knlGS:00000000f7f3ab40 [ 28.060966] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 28.066813] CR2: 000055e818e10088 CR3: 00000001ce355006 CR4: 00000000001606e0 [ 28.074049] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.081286] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.088524] Call Trace: [ 28.091082] ? mon_alloc_buff+0x1a0/0x1a0 [ 28.095196] ? find_held_lock+0x35/0x1d0 [ 28.099230] __do_fault+0xeb/0x30f [ 28.102737] ? pte_offset_kernel+0xc7/0xc7 [ 28.106939] ? rb_insert_color_cached+0x1660/0x1660 [ 28.111922] ? rcutorture_record_progress+0x10/0x10 [ 28.116902] ? check_noncircular+0x20/0x20 [ 28.121102] __handle_mm_fault+0x1d8f/0x3ce0 [ 28.125478] ? __pmd_alloc+0x4e0/0x4e0 [ 28.129338] ? __save_stack_trace+0x7e/0xd0 [ 28.133628] ? find_held_lock+0x35/0x1d0 [ 28.137657] ? handle_mm_fault+0x248/0x8d0 [ 28.141856] ? lock_downgrade+0x980/0x980 [ 28.145978] handle_mm_fault+0x334/0x8d0 [ 28.150005] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 28.154569] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 28.160418] ? find_vma+0x30/0x150 [ 28.163926] __get_user_pages+0x50c/0x15f0 [ 28.168136] ? follow_page_mask+0x17f0/0x17f0 [ 28.172614] ? lock_acquire+0x1d5/0x580 [ 28.176556] ? lock_acquire+0x1d5/0x580 [ 28.180494] ? __mm_populate+0x2c7/0x450 [ 28.184523] ? lock_release+0xa40/0xa40 [ 28.188460] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 28.194312] ? rcu_note_context_switch+0x710/0x710 [ 28.199211] populate_vma_page_range+0x20e/0x2f0 [ 28.203933] ? get_user_pages+0xc0/0xc0 [ 28.207872] ? vmacache_find+0x5f/0x280 [ 28.211817] ? vmacache_update+0xfe/0x130 [ 28.215947] ? find_vma+0x30/0x150 [ 28.219452] __mm_populate+0x23a/0x450 [ 28.223309] ? populate_vma_page_range+0x2f0/0x2f0 [ 28.228202] ? down_read_killable+0x180/0x180 [ 28.232675] ? security_mmap_file+0x143/0x180 [ 28.237138] vm_mmap_pgoff+0x241/0x280 [ 28.240992] ? vma_is_stack_for_current+0xa0/0xa0 [ 28.245806] ? putname+0xee/0x130 [ 28.249225] ? rcu_read_lock_sched_held+0x108/0x120 [ 28.254208] ? kmem_cache_free+0x267/0x2a0 [ 28.258415] SyS_mmap_pgoff+0x462/0x5f0 [ 28.262357] ? find_mergeable_anon_vma+0xd0/0xd0 [ 28.267078] ? do_fast_syscall_32+0x156/0xf9d [ 28.271538] ? find_mergeable_anon_vma+0xd0/0xd0 [ 28.276257] do_fast_syscall_32+0x3ee/0xf9d [ 28.280547] ? do_int80_syscall_32+0x9d0/0x9d0 [ 28.285093] ? _raw_spin_unlock_irq+0x56/0x70 [ 28.289557] ? syscall_return_slowpath+0x2ad/0x550 [ 28.294450] ? prepare_exit_to_usermode+0x340/0x340 [ 28.299433] ? sysret32_from_system_call+0x5/0x3b [ 28.304241] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.309050] entry_SYSENTER_compat+0x54/0x63 [ 28.313422] RIP: 0023:0xf7f3ec79 [ 28.316749] RSP: 002b:00000000f7f3a1ec EFLAGS: 00000292 ORIG_RAX: 00000000000000c0 [ 28.324423] RAX: ffffffffffffffda RBX: 0000000020ac6000 RCX: 0000000000004000 [ 28.331659] RDX: 0000000001000004 RSI: 0000000000008011 RDI: 000000000000000d [ 28.338893] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 28.346129] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 28.353366] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 28.360609] 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 [ 28.379676] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c8447388 [ 28.386198] ---[ end trace e60e18c6daa67ae8 ]--- [ 28.391067] Kernel panic - not syncing: Fatal exception [ 28.396810] Dumping ftrace buffer: [ 28.400321] (ftrace buffer empty) [ 28.404000] Kernel Offset: disabled [ 28.407595] Rebooting in 86400 seconds..