[....] Starting enhanced syslogd: rsyslogd[ 11.304731] audit: type=1400 audit(1514704010.548:5): avc: denied { syslog } for pid=3036 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: [ 16.404419] audit: type=1400 audit(1514704015.648:6): avc: denied { map } for pid=3175 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 '10.128.15.201' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program [ 22.560399] audit: type=1400 audit(1514704021.804:7): avc: denied { map } for pid=3189 comm="syzkaller651192" path="/root/syzkaller651192375" 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 [ 22.586692] audit: type=1400 audit(1514704021.813:8): avc: denied { map } for pid=3189 comm="syzkaller651192" path="/dev/usbmon0" dev="devtmpfs" ino=8936 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 [ 22.614161] page:000000009ed316fe count:0 mapcount:0 mapping: (null) index:0x0 [ 22.622372] flags: 0x2fffc0000000000() [ 22.626274] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 22.634156] raw: ffffea00071e8360 ffffea00071fcd20 0000000000000000 0000000000000000 [ 22.642041] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 22.649138] ------------[ cut here ]------------ [ 22.653860] kernel BUG at ./include/linux/mm.h:844! [ 22.658878] invalid opcode: 0000 [#1] SMP KASAN [ 22.663521] Dumping ftrace buffer: [ 22.667024] (ftrace buffer empty) [ 22.670697] Modules linked in: [ 22.673856] CPU: 0 PID: 3190 Comm: syzkaller651192 Not tainted 4.15.0-rc5+ #153 [ 22.681264] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 22.690590] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 22.695568] RSP: 0018:ffff8801c7e27388 EFLAGS: 00010203 [ 22.700893] RAX: 0000000000000000 RBX: 1ffff10038fc4e73 RCX: 0000000000000000 [ 22.708129] RDX: 0000000000000000 RSI: 1ffff10038fc4dbd RDI: ffffed0038fc4e60 [ 22.715370] RBP: ffff8801c7e27460 R08: 1ffff10038fc4d7f R09: 0000000000000000 [ 22.722605] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10038fc4e77 [ 22.729840] R13: dffffc0000000000 R14: ffff8801c7e276b8 R15: ffffea00071fb500 [ 22.737074] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f7f75b40 [ 22.745263] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 22.751108] CR2: 0000558ef5dd60b8 CR3: 00000001cae5d002 CR4: 00000000001606f0 [ 22.758345] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.765577] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.772811] Call Trace: [ 22.775375] ? mon_alloc_buff+0x1a0/0x1a0 [ 22.779497] ? find_held_lock+0x35/0x1d0 [ 22.783531] __do_fault+0xeb/0x30f [ 22.787037] ? pte_offset_kernel+0xc7/0xc7 [ 22.791239] ? rb_insert_color_cached+0x1660/0x1660 [ 22.796222] ? rcutorture_record_progress+0x10/0x10 [ 22.801202] ? check_noncircular+0x20/0x20 [ 22.805403] __handle_mm_fault+0x1d8f/0x3ce0 [ 22.809780] ? __pmd_alloc+0x4e0/0x4e0 [ 22.813633] ? __save_stack_trace+0x7e/0xd0 [ 22.817923] ? find_held_lock+0x35/0x1d0 [ 22.821958] ? handle_mm_fault+0x248/0x8d0 [ 22.826156] ? lock_downgrade+0x980/0x980 [ 22.830280] handle_mm_fault+0x334/0x8d0 [ 22.834307] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 22.838854] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 22.844704] ? find_vma+0x30/0x150 [ 22.848213] __get_user_pages+0x50c/0x15f0 [ 22.852417] ? follow_page_mask+0x17f0/0x17f0 [ 22.856880] ? lock_acquire+0x1d5/0x580 [ 22.860820] ? lock_acquire+0x1d5/0x580 [ 22.864757] ? __mm_populate+0x2c7/0x450 [ 22.868786] ? lock_release+0xa40/0xa40 [ 22.872725] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 22.878573] ? rcu_note_context_switch+0x710/0x710 [ 22.883469] populate_vma_page_range+0x20e/0x2f0 [ 22.888193] ? get_user_pages+0xc0/0xc0 [ 22.892133] ? vmacache_find+0x5f/0x280 [ 22.896070] ? vmacache_update+0xfe/0x130 [ 22.900183] ? find_vma+0x30/0x150 [ 22.903689] __mm_populate+0x23a/0x450 [ 22.907544] ? populate_vma_page_range+0x2f0/0x2f0 [ 22.912438] ? down_read_killable+0x180/0x180 [ 22.916899] ? security_mmap_file+0x143/0x180 [ 22.921363] vm_mmap_pgoff+0x241/0x280 [ 22.925219] ? vma_is_stack_for_current+0xa0/0xa0 [ 22.930371] ? putname+0xee/0x130 [ 22.933786] ? rcu_read_lock_sched_held+0x108/0x120 [ 22.938766] ? kmem_cache_free+0x267/0x2a0 [ 22.942973] SyS_mmap_pgoff+0x462/0x5f0 [ 22.946914] ? find_mergeable_anon_vma+0xd0/0xd0 [ 22.951636] ? do_fast_syscall_32+0x156/0xf9d [ 22.956603] ? find_mergeable_anon_vma+0xd0/0xd0 [ 22.961327] do_fast_syscall_32+0x3ee/0xf9d [ 22.965616] ? do_int80_syscall_32+0x9d0/0x9d0 [ 22.970167] ? syscall_return_slowpath+0x2ad/0x550 [ 22.975062] ? prepare_exit_to_usermode+0x340/0x340 [ 22.980045] ? sysret32_from_system_call+0x5/0x3b [ 22.984852] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 22.989673] entry_SYSENTER_compat+0x54/0x63 [ 22.994044] RIP: 0023:0xf7f79c79 [ 22.997372] RSP: 002b:00000000f7f751ec EFLAGS: 00000292 ORIG_RAX: 00000000000000c0 [ 23.005042] RAX: ffffffffffffffda RBX: 0000000020ac6000 RCX: 0000000000004000 [ 23.012278] RDX: 0000000001000004 RSI: 0000000000008011 RDI: 0000000000000018 [ 23.019676] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 23.026911] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 23.034143] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 23.041501] 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 2b 6a 9e fd 48 c7 c6 40 8d d1 85 4c 89 ff e8 3c 51 c7 fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 07 6a 9e fd [ 23.060571] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c7e27388 [ 23.067095] ---[ end trace 78eb84c3edd4d653 ]--- [ 23.071997] Kernel panic - not syncing: Fatal exception [ 23.077755] Dumping ftrace buffer: [ 23.081261] (ftrace buffer empty) [ 23.084935] Kernel Offset: disabled [ 23.088524] Rebooting in 86400 seconds..