[....] Starting enhanced syslogd: rsyslogd[ 12.179403] audit: type=1400 audit(1514499553.546:5): 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: [ 16.370178] audit: type=1400 audit(1514499557.736:6): avc: denied { map } for pid=3137 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 '10.128.0.55' (ECDSA) to the list of known hosts. executing program executing program executing program executing program [ 22.676615] audit: type=1400 audit(1514499564.043:7): avc: denied { map } for pid=3151 comm="syzkaller898185" path="/root/syzkaller898185288" 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 [ 22.702752] audit: type=1400 audit(1514499564.043:8): avc: denied { map } for pid=3151 comm="syzkaller898185" path="/dev/usbmon0" dev="devtmpfs" ino=97 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 [ 22.736829] page:ffffea000726e040 count:0 mapcount:0 mapping: (null) index:0x0 [ 22.745122] flags: 0x2fffc0000000000() [ 22.749196] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 22.757137] raw: ffffea000726eb60 ffffea00072351a0 0000000000000000 0000000000000000 [ 22.765052] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 22.772202] ------------[ cut here ]------------ [ 22.776938] kernel BUG at ./include/linux/mm.h:844! [ 22.781984] invalid opcode: 0000 [#1] SMP KASAN [ 22.786637] Dumping ftrace buffer: [ 22.790144] (ftrace buffer empty) [ 22.793820] Modules linked in: [ 22.796984] CPU: 0 PID: 3152 Comm: syzkaller898185 Not tainted 4.15.0-rc4-mm1+ #49 [ 22.804657] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 22.813992] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 22.818973] RSP: 0018:ffff8801c866f510 EFLAGS: 00010203 [ 22.824301] RAX: 0000000000000000 RBX: 1ffff100390cdea4 RCX: 0000000000000000 [ 22.831547] RDX: 0000000000000000 RSI: 1ffff100390cddee RDI: ffffed00390cde90 [ 22.838783] RBP: ffff8801c866f5e8 R08: 1ffff100390cddb0 R09: 0000000000000000 [ 22.846022] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff100390cdea8 [ 22.853262] R13: dffffc0000000000 R14: ffff8801c866f840 R15: ffffea000726e040 [ 22.860503] FS: 00007fc695ae3700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 22.868701] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.874551] CR2: 0000000020000000 CR3: 00000001c8782005 CR4: 00000000001606f0 [ 22.881791] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.889031] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.896284] Call Trace: [ 22.898848] ? mon_alloc_buff+0x1a0/0x1a0 [ 22.902967] ? finish_fault+0x1b4/0x2a0 [ 22.906909] ? lock_downgrade+0x980/0x980 [ 22.911026] ? do_swap_page+0x2a10/0x2a10 [ 22.915143] __do_fault+0xeb/0x30f [ 22.918668] ? pte_offset_kernel+0xc7/0xc7 [ 22.922870] ? vma_compute_subtree_gap+0x200/0x200 [ 22.927766] ? check_noncircular+0x20/0x20 [ 22.931968] ? _raw_spin_unlock+0x22/0x30 [ 22.936084] __handle_mm_fault+0x1d8f/0x3ce0 [ 22.940470] ? __pmd_alloc+0x4e0/0x4e0 [ 22.944357] ? find_held_lock+0x35/0x1d0 [ 22.948390] ? handle_mm_fault+0x2a0/0x930 [ 22.952592] ? lock_downgrade+0x980/0x980 [ 22.956717] handle_mm_fault+0x38f/0x930 [ 22.960746] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 22.965294] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 22.971148] ? find_vma+0x30/0x150 [ 22.974659] __get_user_pages+0x50c/0x15f0 [ 22.978867] ? follow_page_mask+0x17f0/0x17f0 [ 22.983328] ? vma_link+0xe9/0x170 [ 22.986852] ? lock_acquire+0x1d5/0x580 [ 22.990790] ? lock_acquire+0x1d5/0x580 [ 22.994732] ? __mm_populate+0x2c7/0x450 [ 22.998762] ? lock_release+0xa40/0xa40 [ 23.002703] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.008562] ? rcu_note_context_switch+0x710/0x710 [ 23.013472] populate_vma_page_range+0x20e/0x2f0 [ 23.018199] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 23.023094] ? vmacache_find+0x5f/0x280 [ 23.027036] ? vmacache_update+0xfe/0x130 [ 23.031153] ? find_vma+0x30/0x150 [ 23.034660] __mm_populate+0x23a/0x450 [ 23.038521] ? populate_vma_page_range+0x2f0/0x2f0 [ 23.043417] ? down_read_killable+0x180/0x180 [ 23.047881] ? security_mmap_file+0x143/0x180 [ 23.052353] vm_mmap_pgoff+0x241/0x280 [ 23.056211] ? vma_is_stack_for_current+0xa0/0xa0 [ 23.061030] ? rcu_read_lock_sched_held+0x108/0x120 [ 23.066026] SyS_mmap_pgoff+0x462/0x5f0 [ 23.069979] ? find_mergeable_anon_vma+0xd0/0xd0 [ 23.074703] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.079690] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 23.084418] SyS_mmap+0x16/0x20 [ 23.087669] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 23.092391] RIP: 0033:0x449359 [ 23.095549] RSP: 002b:00007fc695ae2d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 23.103221] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449359 [ 23.110467] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 23.117714] RBP: 00000000006dac20 R08: 0000000000000012 R09: 0000000000000000 [ 23.124951] R10: 0000000000008011 R11: 0000000000000212 R12: 6c74635f6664615f [ 23.132187] R13: 7461712f7665642f R14: 6273752f7665642f R15: 0000000000000009 [ 23.139431] 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 db e1 96 fd 48 c7 c6 80 1f d1 85 4c 89 ff e8 6c a3 c0 fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 b7 e1 96 fd [ 23.158501] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c866f510 [ 23.165052] ---[ end trace 8f77d93d51867aa1 ]--- [ 23.169968] Kernel panic - not syncing: Fatal exception [ 23.175917] Dumping ftrace buffer: [ 23.179438] (ftrace buffer empty) [ 23.183116] Kernel Offset: disabled [ 23.186710] Rebooting in 86400 seconds..