[....] Starting enhanced syslogd: rsyslogd[ 10.101457] audit: type=1400 audit(1514498706.563:5): avc: denied { syslog } for pid=2997 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: [ 12.950157] audit: type=1400 audit(1514498709.411:6): avc: denied { map } for pid=3135 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 '10.128.0.25' (ECDSA) to the list of known hosts. executing program executing program executing program executing program [ 19.144270] audit: type=1400 audit(1514498715.605:7): avc: denied { map } for pid=3149 comm="syzkaller800530" path="/root/syzkaller800530995" 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 [ 19.170315] audit: type=1400 audit(1514498715.615:8): avc: denied { map } for pid=3149 comm="syzkaller800530" path="/dev/usbmon0" dev="devtmpfs" ino=1089 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 [ 19.205393] page:00000000a6c2724b count:0 mapcount:0 mapping: (null) index:0x0 [ 19.213680] flags: 0x2fffc0000000000() [ 19.217715] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 19.225634] raw: ffffea000724f660 ffffea000724dda0 0000000000000000 0000000000000000 [ 19.233516] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 19.240644] ------------[ cut here ]------------ [ 19.245383] kernel BUG at ./include/linux/mm.h:844! [ 19.250415] invalid opcode: 0000 [#1] SMP KASAN [ 19.255061] Dumping ftrace buffer: [ 19.258566] (ftrace buffer empty) [ 19.262244] Modules linked in: [ 19.265404] CPU: 1 PID: 3150 Comm: syzkaller800530 Not tainted 4.15.0-rc4-next-20171221+ #78 [ 19.273942] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 19.283271] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 19.288250] RSP: 0018:ffff8801c8a47510 EFLAGS: 00010203 [ 19.293582] RAX: 0000000000000000 RBX: 1ffff10039148ea4 RCX: 0000000000000000 [ 19.300818] RDX: 0000000000000000 RSI: 1ffff10039148dee RDI: ffffed0039148e90 [ 19.308058] RBP: ffff8801c8a475e8 R08: 1ffff10039148db0 R09: 0000000000000000 [ 19.315294] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10039148ea8 [ 19.322531] R13: dffffc0000000000 R14: ffff8801c8a47840 R15: ffffea0007222600 [ 19.329768] FS: 00007fab2b772700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 19.337967] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 19.343814] CR2: 0000000020000000 CR3: 00000001c9efe003 CR4: 00000000001606e0 [ 19.351052] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 19.358290] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 19.365527] Call Trace: [ 19.368085] ? mon_alloc_buff+0x1a0/0x1a0 [ 19.372204] ? finish_fault+0x1b4/0x2a0 [ 19.376146] ? lock_downgrade+0x980/0x980 [ 19.380263] ? do_swap_page+0x2a10/0x2a10 [ 19.384377] __do_fault+0xeb/0x30f [ 19.387889] ? pte_offset_kernel+0xc7/0xc7 [ 19.392090] ? vma_compute_subtree_gap+0x200/0x200 [ 19.396986] ? check_noncircular+0x20/0x20 [ 19.401186] ? _raw_spin_unlock+0x22/0x30 [ 19.405302] __handle_mm_fault+0x1d8f/0x3ce0 [ 19.409680] ? __pmd_alloc+0x4e0/0x4e0 [ 19.413535] ? find_held_lock+0x35/0x1d0 [ 19.417563] ? handle_mm_fault+0x2a0/0x930 [ 19.421766] ? lock_downgrade+0x980/0x980 [ 19.425890] handle_mm_fault+0x38f/0x930 [ 19.429919] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 19.434469] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 19.440318] ? find_vma+0x30/0x150 [ 19.443826] __get_user_pages+0x50c/0x15f0 [ 19.448036] ? follow_page_mask+0x17f0/0x17f0 [ 19.452497] ? vma_link+0xe9/0x170 [ 19.456006] ? lock_acquire+0x1d5/0x580 [ 19.459949] ? lock_acquire+0x1d5/0x580 [ 19.463894] ? __mm_populate+0x2c7/0x450 [ 19.467923] ? lock_release+0xa40/0xa40 [ 19.471863] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 19.477716] ? rcu_note_context_switch+0x710/0x710 [ 19.482614] populate_vma_page_range+0x20e/0x2f0 [ 19.487337] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 19.492236] ? vmacache_find+0x5f/0x280 [ 19.496174] ? vmacache_update+0xfe/0x130 [ 19.500288] ? find_vma+0x30/0x150 [ 19.503793] __mm_populate+0x23a/0x450 [ 19.507660] ? populate_vma_page_range+0x2f0/0x2f0 [ 19.512555] ? down_read_killable+0x180/0x180 [ 19.517022] ? security_mmap_file+0x143/0x180 [ 19.521488] vm_mmap_pgoff+0x241/0x280 [ 19.525351] ? vma_is_stack_for_current+0xa0/0xa0 [ 19.530245] ? rcu_read_lock_sched_held+0x108/0x120 [ 19.535233] SyS_mmap_pgoff+0x462/0x5f0 [ 19.539180] ? find_mergeable_anon_vma+0xd0/0xd0 [ 19.543901] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 19.548884] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 19.553615] SyS_mmap+0x16/0x20 [ 19.556861] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 19.561596] RIP: 0033:0x449359 [ 19.564751] RSP: 002b:00007fab2b771d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 19.572422] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449359 [ 19.579658] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 19.586893] RBP: 00000000006dac20 R08: 0000000000000012 R09: 0000000000000000 [ 19.594129] R10: 0000000000008011 R11: 0000000000000212 R12: 6c74635f6664615f [ 19.601365] R13: 7461712f7665642f R14: 6273752f7665642f R15: 0000000000000009 [ 19.608616] 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 eb f2 96 fd 48 c7 c6 20 1f d1 85 4c 89 ff e8 8c b4 c0 fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 c7 f2 96 fd [ 19.627699] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c8a47510 [ 19.634216] ---[ end trace 813c53cc41b17e8b ]--- [ 19.638965] Kernel panic - not syncing: Fatal exception [ 19.644709] Dumping ftrace buffer: [ 19.648220] (ftrace buffer empty) [ 19.651897] Kernel Offset: disabled [ 19.655490] Rebooting in 86400 seconds..