[....] Starting enhanced syslogd: rsyslogd[ 10.546363] audit: type=1400 audit(1514499587.320:5): avc: denied { syslog } for pid=2989 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: [ 13.076408] audit: type=1400 audit(1514499589.850:6): avc: denied { map } for pid=3129 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 '10.128.15.207' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program [ 19.252172] audit: type=1400 audit(1514499596.025:7): avc: denied { map } for pid=3143 comm="syzkaller180484" path="/root/syzkaller180484318" 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 [ 19.278250] audit: type=1400 audit(1514499596.035:8): avc: denied { map } for pid=3143 comm="syzkaller180484" path="/dev/usbmon0" dev="devtmpfs" ino=1135 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 [ 19.316190] page:00000000cdafadc3 count:0 mapcount:0 mapping: (null) index:0x0 [ 19.324402] flags: 0x2fffc0000000000() [ 19.328318] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 19.336234] raw: ffffea00073b53e0 ffffea000724ae20 0000000000000000 0000000000000000 [ 19.344134] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 19.351239] ------------[ cut here ]------------ [ 19.355962] kernel BUG at ./include/linux/mm.h:844! [ 19.360985] invalid opcode: 0000 [#1] SMP KASAN [ 19.365631] Dumping ftrace buffer: [ 19.369149] (ftrace buffer empty) [ 19.372824] Modules linked in: [ 19.375988] CPU: 1 PID: 3144 Comm: syzkaller180484 Not tainted 4.15.0-rc5+ #149 [ 19.383402] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 19.392731] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 19.397708] RSP: 0018:ffff8801c97cf388 EFLAGS: 00010203 [ 19.403034] RAX: 0000000000000000 RBX: 1ffff100392f9e73 RCX: 0000000000000000 [ 19.410271] RDX: 0000000000000000 RSI: 1ffff100392f9dbd RDI: ffffed00392f9e60 [ 19.417506] RBP: ffff8801c97cf460 R08: 1ffff100392f9d7f R09: 0000000000000000 [ 19.424740] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff100392f9e77 [ 19.431975] R13: dffffc0000000000 R14: ffff8801c97cf6b8 R15: ffffea0007247b40 [ 19.439219] FS: 0000000000000000(0000) GS:ffff8801db500000(0063) knlGS:00000000f7f24b40 [ 19.447410] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 19.453257] CR2: 0000000020000000 CR3: 00000001cf082001 CR4: 00000000001606e0 [ 19.460496] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 19.467731] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 19.474966] Call Trace: [ 19.477525] ? mon_alloc_buff+0x1a0/0x1a0 [ 19.481646] ? finish_fault+0x1b4/0x2a0 [ 19.485594] ? lock_downgrade+0x980/0x980 [ 19.489711] ? do_swap_page+0x2c50/0x2c50 [ 19.493829] __do_fault+0xeb/0x30f [ 19.497337] ? pte_offset_kernel+0xc7/0xc7 [ 19.501543] ? check_noncircular+0x20/0x20 [ 19.505742] ? _raw_spin_unlock+0x22/0x30 [ 19.509855] __handle_mm_fault+0x1d8f/0x3ce0 [ 19.514233] ? __pmd_alloc+0x4e0/0x4e0 [ 19.518087] ? __save_stack_trace+0x7e/0xd0 [ 19.522388] ? find_held_lock+0x35/0x1d0 [ 19.526417] ? handle_mm_fault+0x248/0x8d0 [ 19.530616] ? lock_downgrade+0x980/0x980 [ 19.534740] handle_mm_fault+0x334/0x8d0 [ 19.538768] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 19.543317] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 19.549168] ? find_vma+0x30/0x150 [ 19.552678] __get_user_pages+0x50c/0x15f0 [ 19.556894] ? follow_page_mask+0x17f0/0x17f0 [ 19.561362] ? lock_acquire+0x1d5/0x580 [ 19.565306] ? lock_acquire+0x1d5/0x580 [ 19.569245] ? __mm_populate+0x2c7/0x450 [ 19.573274] ? lock_release+0xa40/0xa40 [ 19.577214] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 19.583070] ? rcu_note_context_switch+0x710/0x710 [ 19.587968] populate_vma_page_range+0x20e/0x2f0 [ 19.592689] ? get_user_pages+0xc0/0xc0 [ 19.596629] ? vmacache_find+0x5f/0x280 [ 19.600567] ? vmacache_update+0xfe/0x130 [ 19.604682] ? find_vma+0x30/0x150 [ 19.608186] __mm_populate+0x23a/0x450 [ 19.612041] ? populate_vma_page_range+0x2f0/0x2f0 [ 19.616937] ? down_read_killable+0x180/0x180 [ 19.621399] ? security_mmap_file+0x143/0x180 [ 19.625862] vm_mmap_pgoff+0x241/0x280 [ 19.629721] ? vma_is_stack_for_current+0xa0/0xa0 [ 19.634533] ? kmem_cache_free+0x267/0x2a0 [ 19.638742] SyS_mmap_pgoff+0x462/0x5f0 [ 19.642684] ? find_mergeable_anon_vma+0xd0/0xd0 [ 19.647408] ? do_fast_syscall_32+0x156/0xf9d [ 19.651873] ? find_mergeable_anon_vma+0xd0/0xd0 [ 19.656594] do_fast_syscall_32+0x3ee/0xf9d [ 19.660884] ? do_int80_syscall_32+0x9d0/0x9d0 [ 19.665437] ? syscall_return_slowpath+0x2ad/0x550 [ 19.670332] ? prepare_exit_to_usermode+0x340/0x340 [ 19.675316] ? sysret32_from_system_call+0x5/0x3b [ 19.680126] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 19.684937] entry_SYSENTER_compat+0x54/0x63 [ 19.689312] RIP: 0023:0xf7f28c79 [ 19.692642] RSP: 002b:00000000f7f241ec EFLAGS: 00000292 ORIG_RAX: 00000000000000c0 [ 19.700317] RAX: ffffffffffffffda RBX: 0000000020ac6000 RCX: 0000000000004000 [ 19.707554] RDX: 0000000001000004 RSI: 0000000000008011 RDI: 0000000000000016 [ 19.714790] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 19.722034] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 19.729271] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 19.736523] 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 bd a4 fd 48 c7 c6 c0 c0 70 85 4c 89 ff e8 2c a3 cd fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 c7 bd a4 fd [ 19.755595] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c97cf388 [ 19.762148] ---[ end trace 8865e82d8e507571 ]--- [ 19.767077] Kernel panic - not syncing: Fatal exception [ 19.772941] Dumping ftrace buffer: [ 19.776451] (ftrace buffer empty) [ 19.780127] Kernel Offset: disabled [ 19.783744] Rebooting in 86400 seconds..