[....] Starting enhanced syslogd: rsyslogd[ 10.957480] audit: type=1400 audit(1514064521.831:5): avc: denied { syslog } for pid=2997 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: [ 15.940059] audit: type=1400 audit(1514064526.813:6): 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-mmots-kasan-gce-3,10.128.15.228' (ECDSA) to the list of known hosts. executing program executing program executing program executing program [ 22.106622] audit: type=1400 audit(1514064532.980:7): avc: denied { map } for pid=3151 comm="syzkaller582021" path="/root/syzkaller582021474" 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 [ 22.132568] audit: type=1400 audit(1514064532.989:8): avc: denied { map } for pid=3151 comm="syzkaller582021" path="/dev/usbmon0" dev="devtmpfs" ino=1071 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 [ 22.194668] page:ffffea00072d6940 count:0 mapcount:0 mapping: (null) index:0x0 [ 22.202938] flags: 0x2fffc0000000000() [ 22.206859] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 22.214750] raw: ffffea00072d7460 ffffea00072725e0 0000000000000000 0000000000000000 [ 22.222632] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 22.229737] ------------[ cut here ]------------ [ 22.234463] kernel BUG at ./include/linux/mm.h:844! [ 22.239487] invalid opcode: 0000 [#1] SMP KASAN [ 22.244134] Dumping ftrace buffer: [ 22.247644] (ftrace buffer empty) [ 22.251322] Modules linked in: [ 22.254488] CPU: 0 PID: 3152 Comm: syzkaller582021 Not tainted 4.15.0-rc4-mm1+ #49 [ 22.262170] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 22.271498] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 22.276478] RSP: 0018:ffff8801c8917510 EFLAGS: 00010203 [ 22.281806] RAX: 0000000000000000 RBX: 1ffff10039122ea4 RCX: 0000000000000000 [ 22.289051] RDX: 0000000000000000 RSI: 1ffff10039122dee RDI: ffffed0039122e90 [ 22.296286] RBP: ffff8801c89175e8 R08: 1ffff10039122db0 R09: 0000000000000000 [ 22.303522] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10039122ea8 [ 22.310758] R13: dffffc0000000000 R14: ffff8801c8917840 R15: ffffea00072d6940 [ 22.318004] FS: 00007f6ebdfc9700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 22.326202] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.332050] CR2: 00000000208be000 CR3: 00000001c9cb6002 CR4: 00000000001606f0 [ 22.339287] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.346522] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.353756] Call Trace: [ 22.356313] ? mon_alloc_buff+0x1a0/0x1a0 [ 22.360432] ? find_held_lock+0x35/0x1d0 [ 22.364469] __do_fault+0xeb/0x30f [ 22.367975] ? vma_gap_callbacks_rotate+0x62/0x80 [ 22.372793] ? pte_offset_kernel+0xc7/0xc7 [ 22.376992] ? print_irqtrace_events+0x270/0x270 [ 22.381718] ? rb_insert_color_cached+0x1660/0x1660 [ 22.386702] ? vma_compute_subtree_gap+0x200/0x200 [ 22.391599] ? rb_insert_color_cached+0x1660/0x1660 [ 22.396584] ? check_noncircular+0x20/0x20 [ 22.400788] __handle_mm_fault+0x1d8f/0x3ce0 [ 22.405165] ? __pmd_alloc+0x4e0/0x4e0 [ 22.409025] ? find_held_lock+0x35/0x1d0 [ 22.413056] ? handle_mm_fault+0x2a0/0x930 [ 22.417261] ? lock_downgrade+0x980/0x980 [ 22.421386] handle_mm_fault+0x38f/0x930 [ 22.425414] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 22.429964] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 22.435815] ? find_vma+0x30/0x150 [ 22.439329] __get_user_pages+0x50c/0x15f0 [ 22.443534] ? follow_page_mask+0x17f0/0x17f0 [ 22.448002] ? vma_link+0xe9/0x170 [ 22.451516] ? lock_acquire+0x1d5/0x580 [ 22.455454] ? lock_acquire+0x1d5/0x580 [ 22.459394] ? __mm_populate+0x2c7/0x450 [ 22.463424] ? lock_release+0xa40/0xa40 [ 22.467371] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 22.473232] ? rcu_note_context_switch+0x710/0x710 [ 22.478133] populate_vma_page_range+0x20e/0x2f0 [ 22.482856] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 22.487751] ? vmacache_find+0x5f/0x280 [ 22.491689] ? vmacache_update+0xfe/0x130 [ 22.495805] ? find_vma+0x30/0x150 [ 22.499315] __mm_populate+0x23a/0x450 [ 22.503175] ? populate_vma_page_range+0x2f0/0x2f0 [ 22.508068] ? down_read_killable+0x180/0x180 [ 22.512531] ? security_mmap_file+0x143/0x180 [ 22.517006] vm_mmap_pgoff+0x241/0x280 [ 22.520868] ? vma_is_stack_for_current+0xa0/0xa0 [ 22.525685] ? putname+0xee/0x130 [ 22.529104] ? rcu_read_lock_sched_held+0x108/0x120 [ 22.534088] ? kmem_cache_free+0x267/0x2a0 [ 22.538293] SyS_mmap_pgoff+0x462/0x5f0 [ 22.542235] ? find_mergeable_anon_vma+0xd0/0xd0 [ 22.546958] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 22.551940] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 22.556666] SyS_mmap+0x16/0x20 [ 22.559912] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 22.564630] RIP: 0033:0x4492a9 [ 22.567797] RSP: 002b:00007f6ebdfc8d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 22.575478] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 00000000004492a9 [ 22.582714] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 22.589948] RBP: 0000000000000000 R08: 000000000000000d R09: 0000000000000000 [ 22.597185] R10: 0000000000008011 R11: 0000000000000212 R12: 00000000006dac20 [ 22.604420] R13: 6273752f7665642f R14: 00007f6ebdfc99c0 R15: 0000000000000007 [ 22.611661] 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 [ 22.630723] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c8917510 [ 22.637262] ---[ end trace b1c60ec429be9afb ]--- [ 22.642068] Kernel panic - not syncing: Fatal exception [ 22.647865] Dumping ftrace buffer: [ 22.651371] (ftrace buffer empty) [ 22.655046] Kernel Offset: disabled [ 22.658637] Rebooting in 86400 seconds..