[....] Starting enhanced syslogd: rsyslogd[ 11.460848] audit: type=1400 audit(1514857134.493:5): 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 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: [ 18.497605] audit: type=1400 audit(1514857141.530:6): 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 '10.128.0.58' (ECDSA) to the list of known hosts. executing program executing program executing program executing program [ 41.590396] audit: type=1400 audit(1514857164.623:7): avc: denied { map } for pid=3501 comm="syzkaller034982" path="/root/syzkaller034982168" 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 executing program [ 41.616571] audit: type=1400 audit(1514857164.623:8): avc: denied { map } for pid=3501 comm="syzkaller034982" path="/dev/usbmon0" dev="devtmpfs" ino=8952 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 [ 41.658736] page:000000000887e5b8 count:0 mapcount:0 mapping: (null) index:0x0 [ 41.667052] flags: 0x2fffc0000000000() [ 41.670993] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 41.678890] raw: ffff8801db22ff60 ffffea0006ff4a60 0000000000000000 0000000000000000 [ 41.686790] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 41.693893] ------------[ cut here ]------------ [ 41.698621] kernel BUG at ./include/linux/mm.h:844! [ 41.703666] invalid opcode: 0000 [#1] SMP KASAN [ 41.708305] Dumping ftrace buffer: [ 41.711822] (ftrace buffer empty) [ 41.715500] Modules linked in: [ 41.718672] CPU: 1 PID: 3502 Comm: syzkaller034982 Not tainted 4.15.0-rc6+ #245 [ 41.726086] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.735423] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 41.740405] RSP: 0018:ffff8801bfca7510 EFLAGS: 00010203 [ 41.745744] RAX: 0000000000000000 RBX: 1ffff10037f94ea4 RCX: 0000000000000000 [ 41.752984] RDX: 0000000000000000 RSI: 1ffff10037f94dee RDI: ffffed0037f94e90 [ 41.760222] RBP: ffff8801bfca75e8 R08: 1ffff10037f94db0 R09: 0000000000000000 [ 41.767459] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10037f94ea8 [ 41.774706] R13: dffffc0000000000 R14: ffff8801bfca7840 R15: ffffea000700d1c0 [ 41.781947] FS: 00007f329ba48700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 41.790145] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.796008] CR2: 00000000208be000 CR3: 00000001bfd19001 CR4: 00000000001606e0 [ 41.803271] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 41.810518] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.817757] Call Trace: [ 41.820315] ? mon_alloc_buff+0x1a0/0x1a0 [ 41.824430] ? find_held_lock+0x35/0x1d0 [ 41.828467] __do_fault+0xeb/0x30f [ 41.831973] ? vma_gap_callbacks_rotate+0x62/0x80 [ 41.836783] ? pte_offset_kernel+0xc7/0xc7 [ 41.840982] ? print_irqtrace_events+0x270/0x270 [ 41.845707] ? rb_insert_color_cached+0x1660/0x1660 [ 41.850700] ? vma_compute_subtree_gap+0x200/0x200 [ 41.855596] ? check_noncircular+0x20/0x20 [ 41.859805] __handle_mm_fault+0x1d8f/0x3ce0 [ 41.864184] ? __pmd_alloc+0x4e0/0x4e0 [ 41.868038] ? __save_stack_trace+0x7e/0xd0 [ 41.872329] ? find_held_lock+0x35/0x1d0 [ 41.876360] ? handle_mm_fault+0x248/0x8d0 [ 41.880560] ? lock_downgrade+0x980/0x980 [ 41.884695] handle_mm_fault+0x334/0x8d0 [ 41.888726] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 41.893273] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 41.899121] ? find_vma+0x30/0x150 [ 41.902630] __get_user_pages+0x50c/0x15f0 [ 41.906846] ? follow_page_mask+0x17f0/0x17f0 [ 41.911320] ? lock_acquire+0x1d5/0x580 [ 41.915268] ? lock_acquire+0x1d5/0x580 [ 41.919207] ? __mm_populate+0x2c7/0x450 [ 41.923243] ? lock_release+0xa40/0xa40 [ 41.927181] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 41.933034] ? rcu_note_context_switch+0x710/0x710 [ 41.937941] populate_vma_page_range+0x20e/0x2f0 [ 41.942662] ? get_user_pages+0xc0/0xc0 [ 41.946602] ? vmacache_find+0x5f/0x280 [ 41.950541] ? vmacache_update+0xfe/0x130 [ 41.954656] ? find_vma+0x30/0x150 [ 41.958162] __mm_populate+0x23a/0x450 [ 41.962017] ? populate_vma_page_range+0x2f0/0x2f0 [ 41.966920] ? down_read_killable+0x180/0x180 [ 41.971392] ? security_mmap_file+0x143/0x180 [ 41.975864] vm_mmap_pgoff+0x241/0x280 [ 41.979721] ? vma_is_stack_for_current+0xa0/0xa0 [ 41.984530] ? putname+0xee/0x130 [ 41.987958] ? rcu_read_lock_sched_held+0x108/0x120 [ 41.992940] ? kmem_cache_free+0x267/0x2a0 [ 41.997146] SyS_mmap_pgoff+0x462/0x5f0 [ 42.001096] ? find_mergeable_anon_vma+0xd0/0xd0 [ 42.005818] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 42.010811] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 42.015546] SyS_mmap+0x16/0x20 [ 42.018793] entry_SYSCALL_64_fastpath+0x23/0x9a [ 42.023516] RIP: 0033:0x449229 [ 42.026672] RSP: 002b:00007f329ba47d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 42.034352] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449229 [ 42.041588] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 42.048838] RBP: 0000000000000000 R08: 000000000000000c R09: 0000000000000000 [ 42.056074] R10: 0000000000008011 R11: 0000000000000212 R12: 00000000006dac20 [ 42.063311] R13: 6273752f7665642f R14: 00007f329ba489c0 R15: 0000000000000005 [ 42.070554] 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 2b b0 94 fd 48 c7 c6 20 b1 12 86 4c 89 ff e8 bc 98 bd fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 07 b0 94 fd [ 42.089634] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801bfca7510 [ 42.096163] ---[ end trace ca0e08beddb4240b ]--- [ 42.101066] Kernel panic - not syncing: Fatal exception [ 42.106795] Dumping ftrace buffer: [ 42.110307] (ftrace buffer empty) [ 42.113994] Kernel Offset: disabled [ 42.117598] Rebooting in 86400 seconds..