[....] Starting enhanced syslogd: rsyslogd[ 10.606058] audit: type=1400 audit(1514251441.618:5): avc: denied { syslog } for pid=2996 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] 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: [ 16.455048] audit: type=1400 audit(1514251447.467:6): 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 'ci-upstream-kasan-gce-3,10.128.0.56' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program [ 33.041423] audit: type=1400 audit(1514251464.054:7): avc: denied { map } for pid=3154 comm="syzkaller228490" path="/root/syzkaller228490183" 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 executing program executing program executing program executing program executing program executing program executing program [ 33.067921] audit: type=1400 audit(1514251464.054:8): avc: denied { map } for pid=3154 comm="syzkaller228490" path="/dev/usbmon0" dev="devtmpfs" ino=8888 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 33.205990] page:0000000075387aae count:0 mapcount:0 mapping: (null) index:0x0 [ 33.214441] flags: 0x2fffc0000000000() [ 33.218367] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 33.226268] raw: ffffea0007220f60 ffffea00072408a0 0000000000000000 0000000000000000 [ 33.234202] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 33.241298] ------------[ cut here ]------------ [ 33.246022] kernel BUG at ./include/linux/mm.h:844! [ 33.251049] invalid opcode: 0000 [#1] SMP KASAN [ 33.255686] Dumping ftrace buffer: [ 33.259191] (ftrace buffer empty) [ 33.262879] Modules linked in: [ 33.266040] CPU: 1 PID: 3155 Comm: syzkaller228490 Not tainted 4.15.0-rc5+ #237 [ 33.273450] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.282778] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 33.287757] RSP: 0018:ffff8801c8be7510 EFLAGS: 00010203 [ 33.293086] RAX: 0000000000000000 RBX: 1ffff1003917cea4 RCX: 0000000000000000 [ 33.300327] RDX: 0000000000000000 RSI: 1ffff1003917cdee RDI: ffffed003917ce90 [ 33.307562] RBP: ffff8801c8be75e8 R08: 1ffff1003917cdb0 R09: 0000000000000000 [ 33.314807] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff1003917cea8 [ 33.322053] R13: dffffc0000000000 R14: ffff8801c8be7840 R15: ffffea000725b7c0 [ 33.329296] FS: 00007f73445bd700(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 [ 33.337496] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.343343] CR2: 00000000208be000 CR3: 00000001ca302004 CR4: 00000000001606e0 [ 33.350581] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.357819] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.365055] Call Trace: [ 33.367621] ? mon_alloc_buff+0x1a0/0x1a0 [ 33.371738] ? finish_fault+0x1b4/0x2a0 [ 33.375688] ? lock_downgrade+0x980/0x980 [ 33.379802] ? do_swap_page+0x2c50/0x2c50 [ 33.383952] __do_fault+0xeb/0x30f [ 33.387462] ? pte_offset_kernel+0xc7/0xc7 [ 33.391667] ? check_noncircular+0x20/0x20 [ 33.395867] ? _raw_spin_unlock+0x22/0x30 [ 33.399994] __handle_mm_fault+0x1d8f/0x3ce0 [ 33.404372] ? __pmd_alloc+0x4e0/0x4e0 [ 33.408226] ? __save_stack_trace+0x7e/0xd0 [ 33.412517] ? find_held_lock+0x35/0x1d0 [ 33.416554] ? handle_mm_fault+0x248/0x8d0 [ 33.420754] ? lock_downgrade+0x980/0x980 [ 33.424888] handle_mm_fault+0x334/0x8d0 [ 33.428915] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 33.433473] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 33.439322] ? find_vma+0x30/0x150 [ 33.442830] __get_user_pages+0x50c/0x15f0 [ 33.447035] ? follow_page_mask+0x17f0/0x17f0 [ 33.451500] ? lock_acquire+0x1d5/0x580 [ 33.455446] ? lock_acquire+0x1d5/0x580 [ 33.459383] ? __mm_populate+0x2c7/0x450 [ 33.463411] ? lock_release+0xa40/0xa40 [ 33.467350] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 33.473211] ? rcu_note_context_switch+0x710/0x710 [ 33.478108] populate_vma_page_range+0x20e/0x2f0 [ 33.482830] ? get_user_pages+0xc0/0xc0 [ 33.486770] ? vmacache_find+0x5f/0x280 [ 33.490708] ? vmacache_update+0xfe/0x130 [ 33.494822] ? find_vma+0x30/0x150 [ 33.498330] __mm_populate+0x23a/0x450 [ 33.502186] ? populate_vma_page_range+0x2f0/0x2f0 [ 33.507094] ? down_read_killable+0x180/0x180 [ 33.511557] ? security_mmap_file+0x143/0x180 [ 33.516022] vm_mmap_pgoff+0x241/0x280 [ 33.519877] ? vma_is_stack_for_current+0xa0/0xa0 [ 33.524684] ? get_unused_fd_flags+0x121/0x190 [ 33.529234] ? retint_kernel+0x10/0x10 [ 33.533091] SyS_mmap_pgoff+0x462/0x5f0 [ 33.537044] ? find_mergeable_anon_vma+0xd0/0xd0 [ 33.541776] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 33.546772] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 33.551499] SyS_mmap+0x16/0x20 [ 33.554745] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 33.559466] RIP: 0033:0x4496e9 [ 33.562630] RSP: 002b:00007f73445bccd8 EFLAGS: 00000216 ORIG_RAX: 0000000000000009 [ 33.570304] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 00000000004496e9 [ 33.577549] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 33.584787] RBP: 00000000006dac20 R08: 0000000000000082 R09: 0000000000000000 [ 33.592022] R10: 0000000000008011 R11: 0000000000000216 R12: 0000000000000000 [ 33.599262] R13: 00007ffec91881bf R14: 00007f73445bd9c0 R15: 0000000000000009 [ 33.606505] 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 3b bf 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 17 bf a4 fd [ 33.625574] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c8be7510 [ 33.632097] ---[ end trace 7d88e4c8b3ac24d4 ]--- [ 33.636963] Kernel panic - not syncing: Fatal exception [ 33.642617] Dumping ftrace buffer: [ 33.646122] (ftrace buffer empty) [ 33.649802] Kernel Offset: disabled [ 33.653396] Rebooting in 86400 seconds..