G[ ok 8[?25h[?0c. [ 30.046186] audit: type=1800 audit(1562252624.967:34): pid=6738 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op="collect_data" cause="failed(directio)" comm="startpar" name="rmnologin" dev="sda1" ino=2456 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 32.217997] random: sshd: uninitialized urandom read (32 bytes read) [ 32.526511] audit: type=1400 audit(1562252627.477:35): avc: denied { map } for pid=6912 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 [ 32.582227] random: sshd: uninitialized urandom read (32 bytes read) [ 33.149077] random: sshd: uninitialized urandom read (32 bytes read) [ 33.333630] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.9' (ECDSA) to the list of known hosts. [ 38.890189] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 39.011253] audit: type=1400 audit(1562252633.967:36): avc: denied { map } for pid=6925 comm="syz-executor467" path="/root/syz-executor467992882" dev="sda1" ino=16483 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 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 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 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 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 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 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 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 executing program executing program executing program executing program executing program executing program executing program executing program [ 39.737615] kobject_add_internal failed for hci2 (error: -2 parent: bluetooth) [ 39.771148] Bluetooth: Can't register HCI device 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 [ 39.788010] kobject_add_internal failed for hci1 (error: -2 parent: bluetooth) [ 39.813447] Bluetooth: Can't register HCI device 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 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 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 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 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 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 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 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 executing program [ 40.449699] kobject_add_internal failed for hci2 (error: -2 parent: bluetooth) [ 40.467023] Bluetooth: Can't register HCI device 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 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 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 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 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 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 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 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 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 [ 41.078111] kobject_add_internal failed for hci1 (error: -2 parent: bluetooth) [ 41.086496] kobject_add_internal failed for hci2 (error: -2 parent: bluetooth) [ 41.103399] Bluetooth: Can't register HCI device [ 41.108980] Bluetooth: Can't register HCI device 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 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 executing program executing program executing program executing program executing program executing program executing program [ 41.274187] kobject_add_internal failed for hci2 (error: -2 parent: bluetooth) [ 41.288004] Bluetooth: Can't register HCI device executing program executing program executing program executing program executing program executing program executing program [ 41.325737] kobject_add_internal failed for hci2 (error: -2 parent: bluetooth) [ 41.342382] Bluetooth: Can't register HCI device 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 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 [ 41.546742] kobject_add_internal failed for hci2 (error: -2 parent: bluetooth) [ 41.571643] kobject_add_internal failed for hci1 (error: -2 parent: bluetooth) [ 41.583988] Bluetooth: Can't register HCI device executing program executing program executing program executing program [ 41.595605] Bluetooth: Can't register HCI device [ 41.607016] kobject_add_internal failed for hci1 (error: -2 parent: bluetooth) [ 41.617146] kobject_add_internal failed for hci6 (error: -2 parent: bluetooth) [ 41.641416] Bluetooth: Can't register HCI device executing program executing program executing program executing program executing program [ 41.647555] Bluetooth: Can't register HCI device executing program executing program executing program executing program executing program executing program executing program [ 41.706844] kobject_add_internal failed for hci3 (error: -2 parent: bluetooth) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 41.753534] kobject_add_internal failed for hci2 (error: -2 parent: bluetooth) [ 41.768274] Bluetooth: Can't register HCI device [ 41.785671] Bluetooth: Can't register HCI device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 41.829433] kobject_add_internal failed for hci1 (error: -2 parent: bluetooth) [ 41.856892] Bluetooth: Can't register HCI device 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 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 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 executing program executing program executing program executing program executing program executing program executing program [ 42.092925] kobject_add_internal failed for hci2 (error: -2 parent: bluetooth) [ 42.131866] Bluetooth: Can't register HCI device 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 executing program executing program executing program [ 42.219784] kobject_add_internal failed for hci2 (error: -2 parent: bluetooth) executing program executing program [ 42.260831] Bluetooth: Can't register HCI device 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 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 executing program executing program executing program executing program executing program executing program [ 42.446499] kobject_add_internal failed for hci4 (error: -2 parent: bluetooth) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 42.489992] Bluetooth: Can't register HCI device 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 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 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 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 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 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 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 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 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 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 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 43.314062] refcount_t: increment on 0; use-after-free. [ 43.330839] ------------[ cut here ]------------ [ 43.335830] WARNING: CPU: 1 PID: 7836 at lib/refcount.c:153 refcount_inc.cold+0x18/0x1f [ 43.343974] Kernel panic - not syncing: panic_on_warn set ... [ 43.343974] [ 43.351533] CPU: 1 PID: 7836 Comm: syz-executor467 Not tainted 4.14.132 #26 [ 43.358639] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.368338] Call Trace: [ 43.371039] dump_stack+0x138/0x19c [ 43.374675] panic+0x1f2/0x426 [ 43.380827] ? add_taint.cold+0x16/0x16 [ 43.384814] ? refcount_inc.cold+0x18/0x1f [ 43.389166] ? refcount_inc.cold+0x18/0x1f [ 43.398803] __warn.cold+0x2f/0x36 [ 43.402477] ? ist_end_non_atomic+0x10/0x10 [ 43.406808] ? refcount_inc.cold+0x18/0x1f [ 43.411592] report_bug+0x216/0x254 [ 43.415222] do_error_trap+0x1bb/0x310 [ 43.419115] ? math_error+0x360/0x360 [ 43.423012] ? vprintk_emit+0x171/0x600 [ 43.427206] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.432092] do_invalid_op+0x1b/0x20 [ 43.435812] invalid_op+0x1b/0x40 [ 43.439263] RIP: 0010:refcount_inc.cold+0x18/0x1f [ 43.444115] RSP: 0018:ffff88809737f9c0 EFLAGS: 00010286 [ 43.449878] RAX: 000000000000002b RBX: ffffffff86fa9020 RCX: 0000000000000000 [ 43.457502] RDX: 0000000000000000 RSI: ffffffff866d0d80 RDI: ffffed1012e6ff2e [ 43.464952] RBP: ffff88809737f9c8 R08: 000000000000002b R09: ffff88808d370f08 [ 43.472405] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a7ccd9b8 [ 43.479684] R13: 0000000000000000 R14: ffff8880a7ccd980 R15: ffff888092c07820 [ 43.487155] kobject_get+0x5b/0x70 [ 43.490841] kobject_add_internal.part.0+0xfc/0x340 [ 43.496128] ? kfree_const+0x40/0x50 [ 43.499854] kobject_add+0x11f/0x180 [ 43.503659] ? kset_create_and_add+0x180/0x180 [ 43.508330] ? get_device_parent.isra.0+0x34e/0x560 [ 43.513745] ? kmem_cache_alloc_trace+0x623/0x790 [ 43.518794] ? lock_downgrade+0x6e0/0x6e0 [ 43.523000] get_device_parent.isra.0+0x415/0x560 [ 43.527956] device_add+0x2d3/0x1490 [ 43.531828] ? device_initialize+0x430/0x430 [ 43.536238] ? device_private_init+0x190/0x190 [ 43.540831] hci_register_dev+0x2d9/0x810 [ 43.544961] ? hci_init_sysfs+0x7c/0xa0 [ 43.549209] __vhci_create_device+0x2a6/0x560 [ 43.553970] vhci_write+0x2a1/0x437 [ 43.557671] __vfs_write+0x4a7/0x6b0 [ 43.561568] ? kernel_read+0x120/0x120 [ 43.568317] ? rw_verify_area+0xea/0x2b0 [ 43.572422] vfs_write+0x198/0x500 [ 43.575948] SyS_write+0xfd/0x230 [ 43.579382] ? SyS_read+0x230/0x230 [ 43.582985] ? do_syscall_64+0x53/0x640 [ 43.587137] ? SyS_read+0x230/0x230 [ 43.590753] do_syscall_64+0x1e8/0x640 [ 43.594707] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.599751] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 43.604966] RIP: 0033:0x441279 [ 43.608137] RSP: 002b:00007ffda3dd1518 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 43.615830] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441279 [ 43.623179] RDX: 0000000000000002 RSI: 0000000020000000 RDI: 0000000000000003 [ 43.630856] RBP: 000000000000a907 R08: 00000000004002c8 R09: 00000000004002c8 [ 43.638295] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000401ff0 [ 43.645567] R13: 0000000000402080 R14: 0000000000000000 R15: 0000000000000000 [ 43.655099] Kernel Offset: disabled [ 43.658789] Rebooting in 86400 seconds..