[....] Starting enhanced syslogd: rsyslogd[ 12.806228] audit: type=1400 audit(1515351374.125:5): avc: denied { syslog } for pid=3338 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: [ 18.204199] audit: type=1400 audit(1515351379.524:6): avc: denied { map } for pid=3478 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 '10.128.15.243' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program [ 40.468485] audit: type=1400 audit(1515351401.788:7): avc: denied { map } for pid=3495 comm="syzkaller420164" path="/root/syzkaller420164793" 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 [ 40.494688] audit: type=1400 audit(1515351401.795:8): avc: denied { map } for pid=3495 comm="syzkaller420164" path="/dev/usbmon0" dev="devtmpfs" ino=7919 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 [ 40.531463] page:ffffea000701da40 count:0 mapcount:0 mapping: (null) index:0x0 [ 40.539697] flags: 0x2fffc0000000000() [ 40.543703] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 40.551620] raw: ffffea0007019460 ffffea000701de20 0000000000000000 0000000000000000 [ 40.559937] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 40.567054] ------------[ cut here ]------------ [ 40.571789] kernel BUG at ./include/linux/mm.h:844! [ 40.576827] invalid opcode: 0000 [#1] SMP KASAN [ 40.581466] Dumping ftrace buffer: [ 40.584975] (ftrace buffer empty) [ 40.588657] Modules linked in: [ 40.591818] CPU: 0 PID: 3496 Comm: syzkaller420164 Not tainted 4.15.0-rc6+ #250 [ 40.599227] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.608568] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 40.613563] RSP: 0018:ffff8801c070f510 EFLAGS: 00010203 [ 40.618898] RAX: 0000000000000000 RBX: 1ffff100380e1ea4 RCX: 0000000000000000 [ 40.626136] RDX: 0000000000000000 RSI: 1ffff100380e1dee RDI: ffffed00380e1e90 [ 40.633373] RBP: ffff8801c070f5e8 R08: 1ffff100380e1db0 R09: 0000000000000000 [ 40.640608] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff100380e1ea8 [ 40.647844] R13: dffffc0000000000 R14: ffff8801c070f840 R15: ffffea000701da40 [ 40.655166] FS: 00007f558aeb8700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 40.663359] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.669215] CR2: 00000000208be000 CR3: 00000001c0799005 CR4: 00000000001606f0 [ 40.676465] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 40.683706] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 40.690947] Call Trace: [ 40.693507] ? mon_alloc_buff+0x1a0/0x1a0 [ 40.697629] ? find_held_lock+0x35/0x1d0 [ 40.701666] __do_fault+0xeb/0x30f [ 40.705175] ? vma_gap_callbacks_rotate+0x62/0x80 [ 40.709985] ? pte_offset_kernel+0xc7/0xc7 [ 40.714185] ? print_irqtrace_events+0x270/0x270 [ 40.718915] ? rb_insert_color_cached+0x1660/0x1660 [ 40.723897] ? vma_compute_subtree_gap+0x200/0x200 [ 40.728800] ? check_noncircular+0x20/0x20 [ 40.733001] __handle_mm_fault+0x1d8f/0x3ce0 [ 40.737377] ? __pmd_alloc+0x4e0/0x4e0 [ 40.741235] ? __save_stack_trace+0x7e/0xd0 [ 40.745524] ? find_held_lock+0x35/0x1d0 [ 40.749555] ? handle_mm_fault+0x248/0x8d0 [ 40.753756] ? lock_downgrade+0x980/0x980 [ 40.757889] handle_mm_fault+0x334/0x8d0 [ 40.761916] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 40.766464] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 40.772315] ? find_vma+0x30/0x150 [ 40.775826] __get_user_pages+0x50c/0x15f0 [ 40.780032] ? follow_page_mask+0x17f0/0x17f0 [ 40.784499] ? lock_acquire+0x1d5/0x580 [ 40.788439] ? lock_acquire+0x1d5/0x580 [ 40.792378] ? __mm_populate+0x2c7/0x450 [ 40.796415] ? lock_release+0xa40/0xa40 [ 40.800363] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 40.806225] ? rcu_note_context_switch+0x710/0x710 [ 40.811126] populate_vma_page_range+0x20e/0x2f0 [ 40.815850] ? get_user_pages+0xc0/0xc0 [ 40.819792] ? vmacache_find+0x5f/0x280 [ 40.823731] ? vmacache_update+0xfe/0x130 [ 40.827844] ? find_vma+0x30/0x150 [ 40.831350] __mm_populate+0x23a/0x450 [ 40.835206] ? populate_vma_page_range+0x2f0/0x2f0 [ 40.840101] ? down_read_killable+0x180/0x180 [ 40.844564] ? security_mmap_file+0x143/0x180 [ 40.849030] vm_mmap_pgoff+0x241/0x280 [ 40.852888] ? vma_is_stack_for_current+0xa0/0xa0 [ 40.857699] ? putname+0xee/0x130 [ 40.861119] ? rcu_read_lock_sched_held+0x108/0x120 [ 40.866102] ? kmem_cache_free+0x267/0x2a0 [ 40.870310] SyS_mmap_pgoff+0x462/0x5f0 [ 40.874254] ? find_mergeable_anon_vma+0xd0/0xd0 [ 40.878974] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 40.883959] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 40.888689] SyS_mmap+0x16/0x20 [ 40.891940] entry_SYSCALL_64_fastpath+0x23/0x9a [ 40.896659] RIP: 0033:0x449229 [ 40.899814] RSP: 002b:00007f558aeb7d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 40.907489] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449229 [ 40.914725] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 40.921963] RBP: 0000000000000000 R08: 000000000000000c R09: 0000000000000000 [ 40.929203] R10: 0000000000008011 R11: 0000000000000212 R12: 00000000006dac20 [ 40.936439] R13: 6273752f7665642f R14: 00007f558aeb89c0 R15: 0000000000000005 [ 40.943684] 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 fb a3 94 fd 48 c7 c6 a0 b1 12 86 4c 89 ff e8 8c 8c bd fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 d7 a3 94 fd [ 40.962755] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c070f510 [ 40.970215] ---[ end trace f11e4be3fc952507 ]--- [ 40.975084] Kernel panic - not syncing: Fatal exception [ 40.980483] Dumping ftrace buffer: [ 40.983993] (ftrace buffer empty) [ 40.987674] Kernel Offset: disabled [ 40.991270] Rebooting in 86400 seconds..