[....] Starting enhanced syslogd: rsyslogd[ 12.263049] audit: type=1400 audit(1515558458.722:5): avc: denied { syslog } for pid=3345 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: [ 16.620756] audit: type=1400 audit(1515558463.080:6): avc: denied { map } for pid=3484 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 '10.128.15.241' (ECDSA) to the list of known hosts. executing program executing program [ 22.802048] audit: type=1400 audit(1515558469.261:7): avc: denied { map } for pid=3498 comm="syzkaller084392" path="/root/syzkaller084392732" 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 [ 22.828605] audit: type=1400 audit(1515558469.262:8): avc: denied { map } for pid=3498 comm="syzkaller084392" path="/dev/usbmon0" dev="devtmpfs" ino=8797 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 [ 22.883393] page:ffffea000705fbc0 count:0 mapcount:0 mapping: (null) index:0x0 [ 22.891664] flags: 0x2fffc0000000000() [ 22.895567] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 22.903483] raw: ffffea0007050360 ffffea0007059be0 0000000000000000 0000000000000000 [ 22.911367] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 22.918457] ------------[ cut here ]------------ [ 22.923181] kernel BUG at ./include/linux/mm.h:844! [ 22.928201] invalid opcode: 0000 [#1] SMP KASAN [ 22.932846] Dumping ftrace buffer: [ 22.936365] (ftrace buffer empty) [ 22.940041] Modules linked in: [ 22.943199] CPU: 1 PID: 3499 Comm: syzkaller084392 Not tainted 4.15.0-rc7+ #165 [ 22.950607] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 22.959949] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 22.964930] RSP: 0018:ffff8801c045f388 EFLAGS: 00010203 [ 22.970259] RAX: 0000000000000000 RBX: 1ffff1003808be73 RCX: 0000000000000000 [ 22.977499] RDX: 0000000000000000 RSI: 1ffff1003808bdbd RDI: ffffed003808be60 [ 22.984733] RBP: ffff8801c045f460 R08: 1ffff1003808bd7f R09: 0000000000000000 [ 22.991967] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff1003808be77 [ 22.999203] R13: dffffc0000000000 R14: ffff8801c045f6b8 R15: ffffea000705fbc0 [ 23.006441] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f7fc9b40 [ 23.014631] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 23.020480] CR2: 00000000208be000 CR3: 00000001c1421004 CR4: 00000000001606e0 [ 23.027717] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.034953] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.042188] Call Trace: [ 23.044746] ? mon_alloc_buff+0x1a0/0x1a0 [ 23.048859] ? find_held_lock+0x35/0x1d0 [ 23.052895] __do_fault+0xeb/0x30f [ 23.056857] ? pte_offset_kernel+0xc7/0xc7 [ 23.061067] ? rb_insert_color_cached+0x1660/0x1660 [ 23.066051] ? rcutorture_record_progress+0x10/0x10 [ 23.071035] ? check_noncircular+0x20/0x20 [ 23.075237] __handle_mm_fault+0x1d8f/0x3ce0 [ 23.079612] ? __pmd_alloc+0x4e0/0x4e0 [ 23.083465] ? __save_stack_trace+0x7e/0xd0 [ 23.087759] ? find_held_lock+0x35/0x1d0 [ 23.091787] ? handle_mm_fault+0x248/0x8d0 [ 23.095987] ? lock_downgrade+0x980/0x980 [ 23.100111] handle_mm_fault+0x334/0x8d0 [ 23.104140] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 23.108686] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.114532] ? find_vma+0x30/0x150 [ 23.118040] __get_user_pages+0x50c/0x15f0 [ 23.122249] ? follow_page_mask+0x17f0/0x17f0 [ 23.126713] ? lock_acquire+0x1d5/0x580 [ 23.130652] ? lock_acquire+0x1d5/0x580 [ 23.134590] ? __mm_populate+0x2c7/0x450 [ 23.138619] ? lock_release+0xa40/0xa40 [ 23.142559] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.148418] ? rcu_note_context_switch+0x710/0x710 [ 23.153317] populate_vma_page_range+0x20e/0x2f0 [ 23.158041] ? get_user_pages+0xc0/0xc0 [ 23.161982] ? vmacache_find+0x5f/0x280 [ 23.165919] ? vmacache_update+0xfe/0x130 [ 23.170036] ? find_vma+0x30/0x150 [ 23.173541] __mm_populate+0x23a/0x450 [ 23.177398] ? populate_vma_page_range+0x2f0/0x2f0 [ 23.182293] ? down_read_killable+0x180/0x180 [ 23.186757] ? security_mmap_file+0x143/0x180 [ 23.191223] vm_mmap_pgoff+0x241/0x280 [ 23.195079] ? vma_is_stack_for_current+0xa0/0xa0 [ 23.199886] ? putname+0xee/0x130 [ 23.203304] ? rcu_read_lock_sched_held+0x108/0x120 [ 23.208283] ? kmem_cache_free+0x267/0x2a0 [ 23.212489] SyS_mmap_pgoff+0x462/0x5f0 [ 23.216430] ? find_mergeable_anon_vma+0xd0/0xd0 [ 23.221150] ? do_fast_syscall_32+0x156/0xf9d [ 23.225614] ? find_mergeable_anon_vma+0xd0/0xd0 [ 23.230333] do_fast_syscall_32+0x3ee/0xf9d [ 23.234626] ? do_int80_syscall_32+0x9d0/0x9d0 [ 23.239178] ? syscall_return_slowpath+0x2ad/0x550 [ 23.244074] ? prepare_exit_to_usermode+0x340/0x340 [ 23.249057] ? sysret32_from_system_call+0x5/0x3b [ 23.253866] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 23.258679] entry_SYSENTER_compat+0x54/0x63 [ 23.263056] RIP: 0023:0xf7fcdc79 [ 23.266384] RSP: 002b:00000000f7fc91ec EFLAGS: 00000292 ORIG_RAX: 00000000000000c0 [ 23.274057] RAX: ffffffffffffffda RBX: 0000000020ac6000 RCX: 0000000000004000 [ 23.281293] RDX: 0000000001000004 RSI: 0000000000008011 RDI: 0000000000000009 [ 23.288528] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 23.295762] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 23.302997] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 23.310243] 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 cb 9c 94 fd 48 c7 c6 a0 b1 12 86 4c 89 ff e8 dc 89 bd fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 a7 9c 94 fd [ 23.329310] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c045f388 [ 23.335845] ---[ end trace 939780ac71bade34 ]--- [ 23.340649] Kernel panic - not syncing: Fatal exception [ 23.346441] Dumping ftrace buffer: [ 23.349947] (ftrace buffer empty) [ 23.353624] Kernel Offset: disabled [ 23.357216] Rebooting in 86400 seconds..