[....] Starting enhanced syslogd: rsyslogd[ 12.848560] audit: type=1400 audit(1515698980.719:5): avc: denied { syslog } for pid=3343 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: [ 18.689632] audit: type=1400 audit(1515698986.560:6): avc: denied { map } for pid=3483 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 '10.128.0.61' (ECDSA) to the list of known hosts. executing program executing program executing program executing program [ 29.452803] audit: type=1400 audit(1515698997.323:7): avc: denied { map } for pid=3498 comm="syzkaller374696" path="/root/syzkaller374696032" 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 [ 29.478782] audit: type=1400 audit(1515698997.323:8): avc: denied { map } for pid=3498 comm="syzkaller374696" path="/dev/usbmon0" dev="devtmpfs" ino=106 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 [ 29.508200] page:ffffea0006ff4840 count:0 mapcount:0 mapping: (null) index:0x0 [ 29.516493] flags: 0x2fffc0000000000() [ 29.520432] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 29.528334] raw: ffffea0006ff6e20 ffffea0006ff4820 0000000000000000 0000000000000000 [ 29.536263] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 29.543408] ------------[ cut here ]------------ [ 29.548140] kernel BUG at ./include/linux/mm.h:844! [ 29.553329] invalid opcode: 0000 [#1] SMP KASAN [ 29.557984] Dumping ftrace buffer: [ 29.561486] (ftrace buffer empty) [ 29.565169] Modules linked in: [ 29.568341] CPU: 0 PID: 3499 Comm: syzkaller374696 Not tainted 4.15.0-rc7+ #167 [ 29.575761] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.585107] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 29.590087] RSP: 0018:ffff8801bfed7388 EFLAGS: 00010203 [ 29.595416] RAX: 0000000000000000 RBX: 1ffff10037fdae73 RCX: 0000000000000000 [ 29.602661] RDX: 0000000000000000 RSI: 1ffff10037fdadbd RDI: ffffed0037fdae60 [ 29.609903] RBP: ffff8801bfed7460 R08: 1ffff10037fdad7f R09: 0000000000000000 [ 29.617143] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10037fdae77 [ 29.624385] R13: dffffc0000000000 R14: ffff8801bfed76b8 R15: ffffea0006ff4840 [ 29.631625] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f7f01b40 [ 29.639814] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 29.645660] CR2: 000055b88d0b50b8 CR3: 00000001bfcfa004 CR4: 00000000001606f0 [ 29.652899] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.660135] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.667377] Call Trace: [ 29.669943] ? mon_alloc_buff+0x1a0/0x1a0 [ 29.674059] ? find_held_lock+0x35/0x1d0 [ 29.678095] __do_fault+0xeb/0x30f [ 29.681615] ? pte_offset_kernel+0xc7/0xc7 [ 29.685818] ? rb_insert_color_cached+0x1660/0x1660 [ 29.690810] ? rcutorture_record_progress+0x10/0x10 [ 29.695790] ? check_noncircular+0x20/0x20 [ 29.699995] __handle_mm_fault+0x1d8f/0x3ce0 [ 29.704370] ? __pmd_alloc+0x4e0/0x4e0 [ 29.708227] ? __save_stack_trace+0x7e/0xd0 [ 29.712528] ? find_held_lock+0x35/0x1d0 [ 29.716559] ? handle_mm_fault+0x248/0x8d0 [ 29.720760] ? lock_downgrade+0x980/0x980 [ 29.724884] handle_mm_fault+0x334/0x8d0 [ 29.728913] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 29.733461] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 29.739313] ? find_vma+0x30/0x150 [ 29.742837] __get_user_pages+0x50c/0x15f0 [ 29.747068] ? follow_page_mask+0x17f0/0x17f0 [ 29.751546] ? lock_acquire+0x1d5/0x580 [ 29.755490] ? lock_acquire+0x1d5/0x580 [ 29.759429] ? __mm_populate+0x2c7/0x450 [ 29.763458] ? lock_release+0xa40/0xa40 [ 29.767396] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 29.773261] ? rcu_note_context_switch+0x710/0x710 [ 29.778160] populate_vma_page_range+0x20e/0x2f0 [ 29.782883] ? get_user_pages+0xc0/0xc0 [ 29.786821] ? vmacache_find+0x5f/0x280 [ 29.790761] ? vmacache_update+0xfe/0x130 [ 29.794876] ? find_vma+0x30/0x150 [ 29.798413] __mm_populate+0x23a/0x450 [ 29.802267] ? populate_vma_page_range+0x2f0/0x2f0 [ 29.807162] ? down_read_killable+0x180/0x180 [ 29.811625] ? security_mmap_file+0x143/0x180 [ 29.816089] vm_mmap_pgoff+0x241/0x280 [ 29.819946] ? vma_is_stack_for_current+0xa0/0xa0 [ 29.824765] SyS_mmap_pgoff+0x462/0x5f0 [ 29.828708] ? find_mergeable_anon_vma+0xd0/0xd0 [ 29.833454] ? do_fast_syscall_32+0x156/0xf9d [ 29.837935] ? find_mergeable_anon_vma+0xd0/0xd0 [ 29.842667] do_fast_syscall_32+0x3ee/0xf9d [ 29.846963] ? do_int80_syscall_32+0x9d0/0x9d0 [ 29.851514] ? syscall_return_slowpath+0x2ad/0x550 [ 29.856408] ? prepare_exit_to_usermode+0x340/0x340 [ 29.861391] ? sysret32_from_system_call+0x5/0x3b [ 29.866200] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.871008] entry_SYSENTER_compat+0x54/0x63 [ 29.875381] RIP: 0023:0xf7f05c79 [ 29.878711] RSP: 002b:00000000f7f011ec EFLAGS: 00000292 ORIG_RAX: 00000000000000c0 [ 29.886381] RAX: ffffffffffffffda RBX: 0000000020ac6000 RCX: 0000000000004000 [ 29.893618] RDX: 0000000001000004 RSI: 0000000000008011 RDI: 000000000000001b [ 29.900860] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 29.908094] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 29.915332] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 29.922574] 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 [ 29.941647] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801bfed7388 [ 29.948189] ---[ end trace 6bedd5664dca9e97 ]--- [ 29.952931] Kernel panic - not syncing: Fatal exception [ 29.958296] Dumping ftrace buffer: [ 29.961810] (ftrace buffer empty) [ 29.965499] Kernel Offset: disabled [ 29.969091] Rebooting in 86400 seconds..