[....] Starting enhanced syslogd: rsyslogd[ 11.998531] audit: type=1400 audit(1515546166.184:5): 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 OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 16.370317] audit: type=1400 audit(1515546170.556:6): 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 '10.128.0.34' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program [ 39.557298] audit: type=1400 audit(1515546193.743:7): avc: denied { map } for pid=3503 comm="syzkaller848956" path="/root/syzkaller848956092" 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 [ 39.583361] audit: type=1400 audit(1515546193.743:8): avc: denied { map } for pid=3503 comm="syzkaller848956" path="/dev/usbmon0" dev="devtmpfs" ino=8954 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 [ 39.620443] page:ffffea0006ff0e00 count:0 mapcount:0 mapping: (null) index:0x0 [ 39.628680] flags: 0x2fffc0000000000() [ 39.632589] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 39.640472] raw: ffffea0006ff3c20 ffffea000700ba60 0000000000000000 0000000000000000 [ 39.648396] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 39.655516] ------------[ cut here ]------------ [ 39.660241] kernel BUG at ./include/linux/mm.h:844! [ 39.665287] invalid opcode: 0000 [#1] SMP KASAN [ 39.669925] Dumping ftrace buffer: [ 39.673432] (ftrace buffer empty) [ 39.677110] Modules linked in: [ 39.680273] CPU: 0 PID: 3504 Comm: syzkaller848956 Not tainted 4.15.0-rc7-next-20180109+ #92 [ 39.688812] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.698146] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 39.703126] RSP: 0018:ffff8801bfcff510 EFLAGS: 00010203 [ 39.708454] RAX: 0000000000000000 RBX: 1ffff10037f9fea4 RCX: 0000000000000000 [ 39.715690] RDX: 0000000000000000 RSI: 1ffff10037f9fdb8 RDI: ffffed0037f9fe90 [ 39.722928] RBP: ffff8801bfcff5e8 R08: 1ffff10037f9fdb0 R09: 0000000000000000 [ 39.730165] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10037f9fea8 [ 39.737412] R13: dffffc0000000000 R14: ffff8801bfcff840 R15: ffffea0006ff0e00 [ 39.744652] FS: 00007fb2b297c700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 39.752855] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.758701] CR2: 0000555a7f341238 CR3: 00000001c0400005 CR4: 00000000001606f0 [ 39.765940] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 39.773177] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 39.780420] Call Trace: [ 39.782984] ? mon_alloc_buff+0x1a0/0x1a0 [ 39.787103] ? finish_fault+0x1b4/0x2a0 [ 39.791047] ? lock_downgrade+0x980/0x980 [ 39.795161] ? do_swap_page+0x2ce0/0x2ce0 [ 39.799277] __do_fault+0xeb/0x315 [ 39.802786] ? pte_offset_kernel+0xc7/0xc7 [ 39.807000] ? vma_compute_subtree_gap+0x200/0x200 [ 39.811898] ? check_noncircular+0x20/0x20 [ 39.816099] ? _raw_spin_unlock+0x22/0x30 [ 39.820224] __handle_mm_fault+0x1d8f/0x3ce0 [ 39.824601] ? __pmd_alloc+0x4e0/0x4e0 [ 39.828458] ? find_held_lock+0x35/0x1d0 [ 39.832491] ? handle_mm_fault+0x2a0/0x930 [ 39.836694] ? lock_downgrade+0x980/0x980 [ 39.840821] handle_mm_fault+0x38f/0x930 [ 39.844851] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 39.849406] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 39.855255] ? find_vma+0x30/0x150 [ 39.858770] __get_user_pages+0x50c/0x15f0 [ 39.862976] ? follow_page_mask+0x17f0/0x17f0 [ 39.867462] ? vma_link+0xe9/0x170 [ 39.871000] ? lock_acquire+0x1d5/0x580 [ 39.874943] ? lock_acquire+0x1d5/0x580 [ 39.878883] ? __mm_populate+0x2c7/0x450 [ 39.882921] ? lock_release+0xa40/0xa40 [ 39.886864] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 39.892719] ? rcu_note_context_switch+0x710/0x710 [ 39.897618] populate_vma_page_range+0x20e/0x2f0 [ 39.902341] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 39.907232] ? vmacache_find+0x5f/0x280 [ 39.911171] ? vmacache_update+0xfe/0x130 [ 39.915287] ? find_vma+0x30/0x150 [ 39.918795] __mm_populate+0x23a/0x450 [ 39.922649] ? populate_vma_page_range+0x2f0/0x2f0 [ 39.927547] ? down_read_killable+0x180/0x180 [ 39.932012] ? security_mmap_file+0x143/0x180 [ 39.936479] vm_mmap_pgoff+0x241/0x280 [ 39.940337] ? vma_is_stack_for_current+0xa0/0xa0 [ 39.945153] SyS_mmap_pgoff+0x462/0x5f0 [ 39.949095] ? find_mergeable_anon_vma+0xd0/0xd0 [ 39.953820] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 39.958804] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 39.963529] SyS_mmap+0x16/0x20 [ 39.966777] entry_SYSCALL_64_fastpath+0x23/0x9a [ 39.971497] RIP: 0033:0x449799 [ 39.974654] RSP: 002b:00007fb2b297bcd8 EFLAGS: 00000216 ORIG_RAX: 0000000000000009 [ 39.982338] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449799 [ 39.989574] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 39.996809] RBP: 00000000006dac20 R08: 0000000000000011 R09: 0000000000000000 [ 40.004044] R10: 0000000000008011 R11: 0000000000000216 R12: 0000000000000000 [ 40.011280] R13: 00007fffd7cac1df R14: 00007fb2b297c9c0 R15: 0000000000000007 [ 40.018523] 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 6b 18 90 fd 48 c7 c6 a0 15 13 86 4c 89 ff e8 2c 04 ba fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 47 18 90 fd [ 40.037595] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801bfcff510 [ 40.044283] ---[ end trace b1f57126e5d9d804 ]--- [ 40.049117] Kernel panic - not syncing: Fatal exception [ 40.054787] Dumping ftrace buffer: [ 40.058300] (ftrace buffer empty) [ 40.061979] Kernel Offset: disabled [ 40.065576] Rebooting in 86400 seconds..