[....] Starting enhanced syslogd: rsyslogd[ 10.833498] audit: type=1400 audit(1514847692.707:5): avc: denied { syslog } for pid=2995 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: [ 16.259250] audit: type=1400 audit(1514847698.132:6): avc: denied { map } for pid=3134 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 '10.128.0.44' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program [ 22.486708] audit: type=1400 audit(1514847704.360:7): avc: denied { map } for pid=3148 comm="syzkaller872458" path="/root/syzkaller872458206" 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 [ 22.513282] audit: type=1400 audit(1514847704.360:8): avc: denied { map } for pid=3148 comm="syzkaller872458" path="/dev/usbmon0" dev="devtmpfs" ino=1068 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 executing program [ 22.560769] page:ffffea000723ae00 count:0 mapcount:0 mapping: (null) index:0x0 [ 22.569032] flags: 0x2fffc0000000000() [ 22.572930] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 22.580846] raw: ffffea00072bab20 ffffea000723ae60 0000000000000000 0000000000000000 [ 22.588749] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 22.595875] ------------[ cut here ]------------ [ 22.600597] kernel BUG at ./include/linux/mm.h:844! [ 22.605619] invalid opcode: 0000 [#1] SMP KASAN [ 22.610261] Dumping ftrace buffer: [ 22.613766] (ftrace buffer empty) [ 22.617443] Modules linked in: [ 22.620602] CPU: 0 PID: 3149 Comm: syzkaller872458 Not tainted 4.15.0-rc4-mm1+ #49 [ 22.628273] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 22.637600] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 22.642578] RSP: 0018:ffff8801c94bf510 EFLAGS: 00010203 [ 22.647906] RAX: 0000000000000000 RBX: 1ffff10039297ea4 RCX: 0000000000000000 [ 22.655140] RDX: 0000000000000000 RSI: 1ffff10039297dee RDI: ffffed0039297e90 [ 22.662373] RBP: ffff8801c94bf5e8 R08: 1ffff10039297db0 R09: 0000000000000000 [ 22.669611] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10039297ea8 [ 22.676875] R13: dffffc0000000000 R14: ffff8801c94bf840 R15: ffffea000723ae00 [ 22.684113] FS: 00007feb2c285700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 22.692306] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.698154] CR2: 00000000208be000 CR3: 00000001c89d8003 CR4: 00000000001606f0 [ 22.705402] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.712639] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.719880] Call Trace: [ 22.722440] ? mon_alloc_buff+0x1a0/0x1a0 [ 22.726553] ? find_held_lock+0x35/0x1d0 [ 22.730589] __do_fault+0xeb/0x30f [ 22.735144] ? vma_gap_callbacks_rotate+0x62/0x80 [ 22.739953] ? pte_offset_kernel+0xc7/0xc7 [ 22.744151] ? print_irqtrace_events+0x270/0x270 [ 22.748876] ? rb_insert_color_cached+0x1660/0x1660 [ 22.753860] ? vma_compute_subtree_gap+0x200/0x200 [ 22.758754] ? rb_insert_color_cached+0x1660/0x1660 [ 22.763734] ? check_noncircular+0x20/0x20 [ 22.767937] __handle_mm_fault+0x1d8f/0x3ce0 [ 22.772312] ? __pmd_alloc+0x4e0/0x4e0 [ 22.776167] ? find_held_lock+0x35/0x1d0 [ 22.780196] ? handle_mm_fault+0x2a0/0x930 [ 22.784401] ? lock_downgrade+0x980/0x980 [ 22.788525] handle_mm_fault+0x38f/0x930 [ 22.792555] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 22.797107] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 22.802958] ? find_vma+0x30/0x150 [ 22.806466] __get_user_pages+0x50c/0x15f0 [ 22.810672] ? follow_page_mask+0x17f0/0x17f0 [ 22.815132] ? vma_link+0xe9/0x170 [ 22.818639] ? lock_acquire+0x1d5/0x580 [ 22.822576] ? lock_acquire+0x1d5/0x580 [ 22.826949] ? __mm_populate+0x2c7/0x450 [ 22.830982] ? lock_release+0xa40/0xa40 [ 22.834919] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 22.840769] ? rcu_note_context_switch+0x710/0x710 [ 22.845669] populate_vma_page_range+0x20e/0x2f0 [ 22.850396] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 22.855288] ? vmacache_find+0x5f/0x280 [ 22.859227] ? vmacache_update+0xfe/0x130 [ 22.863340] ? find_vma+0x30/0x150 [ 22.866845] __mm_populate+0x23a/0x450 [ 22.870700] ? populate_vma_page_range+0x2f0/0x2f0 [ 22.875592] ? down_read_killable+0x180/0x180 [ 22.880053] ? security_mmap_file+0x143/0x180 [ 22.884516] vm_mmap_pgoff+0x241/0x280 [ 22.888371] ? vma_is_stack_for_current+0xa0/0xa0 [ 22.893180] ? putname+0xee/0x130 [ 22.896596] ? rcu_read_lock_sched_held+0x108/0x120 [ 22.901578] ? kmem_cache_free+0x267/0x2a0 [ 22.905782] SyS_mmap_pgoff+0x462/0x5f0 [ 22.909725] ? find_mergeable_anon_vma+0xd0/0xd0 [ 22.914444] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 22.919428] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 22.924153] SyS_mmap+0x16/0x20 [ 22.927401] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 22.932122] RIP: 0033:0x449229 [ 22.935284] RSP: 002b:00007feb2c284d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 22.942956] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449229 [ 22.950201] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 22.957436] RBP: 0000000000000000 R08: 000000000000000e R09: 0000000000000000 [ 22.964673] R10: 0000000000008011 R11: 0000000000000212 R12: 00000000006dac20 [ 22.971908] R13: 6273752f7665642f R14: 00007feb2c2859c0 R15: 0000000000000005 [ 22.979152] 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 [ 22.998216] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c94bf510 [ 23.004728] ---[ end trace e6a7d37fc69845b6 ]--- [ 23.009478] Kernel panic - not syncing: Fatal exception [ 23.015245] Dumping ftrace buffer: [ 23.018758] (ftrace buffer empty) [ 23.022432] Kernel Offset: disabled [ 23.026024] Rebooting in 86400 seconds..