[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 30.945585] random: sshd: uninitialized urandom read (32 bytes read) [ 31.282092] kauditd_printk_skb: 8 callbacks suppressed [ 31.282100] audit: type=1400 audit(1566030835.657:35): avc: denied { map } for pid=6671 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 [ 31.333678] random: sshd: uninitialized urandom read (32 bytes read) [ 31.829791] random: sshd: uninitialized urandom read (32 bytes read) [ 31.993676] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.176' (ECDSA) to the list of known hosts. [ 37.527831] 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 executing program executing program [ 37.636713] audit: type=1400 audit(1566030842.007:36): avc: denied { map } for pid=6685 comm="syz-executor891" path="/root/syz-executor891856134" dev="sda1" ino=16482 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 [ 37.794900] kobject_add_internal failed for hci2 (error: -2 parent: bluetooth) [ 37.811949] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 38.978712] 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 [ 39.021098] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 39.833629] refcount_t: increment on 0; use-after-free. [ 39.839482] ------------[ cut here ]------------ [ 39.844246] WARNING: CPU: 1 PID: 7285 at lib/refcount.c:153 refcount_inc.cold+0x18/0x1f [ 39.852369] kobject: 'hci1' (ffff88807b669b28): calling ktype release [ 39.852371] Kernel panic - not syncing: panic_on_warn set ... [ 39.852371] [ 39.852378] CPU: 1 PID: 7285 Comm: syz-executor891 Not tainted 4.14.139 #35 [ 39.858963] kobject: 'hci1': free name [ 39.866267] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.866270] Call Trace: [ 39.866281] dump_stack+0x138/0x19c [ 39.866291] panic+0x1f2/0x426 [ 39.866297] ? add_taint.cold+0x16/0x16 [ 39.866308] ? refcount_inc.cold+0x18/0x1f [ 39.866318] ? refcount_inc.cold+0x18/0x1f [ 39.866324] __warn.cold+0x2f/0x36 [ 39.866332] ? ist_end_non_atomic+0x10/0x10 [ 39.866339] ? refcount_inc.cold+0x18/0x1f [ 39.866346] report_bug+0x216/0x254 [ 39.866356] do_error_trap+0x1bb/0x310 [ 39.866364] ? math_error+0x360/0x360 [ 39.866374] ? vprintk_emit+0x171/0x600 [ 39.866386] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.866396] do_invalid_op+0x1b/0x20 [ 39.866404] invalid_op+0x1b/0x40 [ 39.948147] RIP: 0010:refcount_inc.cold+0x18/0x1f [ 39.952974] RSP: 0018:ffff88807ad7f9c0 EFLAGS: 00010286 [ 39.958455] RAX: 000000000000002b RBX: ffffffff86fac520 RCX: 0000000000000000 [ 39.965709] RDX: 0000000000000000 RSI: ffffffff869d2b40 RDI: ffffed100f5aff2e [ 39.972969] RBP: ffff88807ad7f9c8 R08: 000000000000002b R09: ffff8880915fab88 [ 39.980224] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a7c9c7b8 [ 39.987479] R13: 0000000000000000 R14: ffff8880a7c9c780 R15: ffff88808de377a0 [ 39.994756] kobject_get+0x5b/0x70 [ 39.998284] kobject_add_internal.part.0+0xfc/0x340 [ 40.003287] ? kfree_const+0x40/0x50 [ 40.006990] kobject_add+0x11f/0x180 [ 40.010691] ? kset_create_and_add+0x180/0x180 [ 40.015261] ? get_device_parent.isra.0+0x34e/0x560 [ 40.020280] ? kmem_cache_alloc_trace+0x623/0x790 [ 40.025112] ? lock_downgrade+0x6e0/0x6e0 [ 40.029253] get_device_parent.isra.0+0x415/0x560 [ 40.034088] device_add+0x2d3/0x1490 [ 40.037804] ? device_initialize+0x430/0x430 [ 40.042208] ? device_private_init+0x190/0x190 [ 40.046787] hci_register_dev+0x2d9/0x810 [ 40.050933] ? hci_init_sysfs+0x7c/0xa0 [ 40.054900] __vhci_create_device+0x2a6/0x560 [ 40.059390] vhci_write+0x2a1/0x437 [ 40.063011] __vfs_write+0x4a7/0x6b0 [ 40.066712] ? kernel_read+0x120/0x120 [ 40.070608] ? rw_verify_area+0xea/0x2b0 [ 40.074658] vfs_write+0x198/0x500 [ 40.078192] SyS_write+0xfd/0x230 [ 40.081636] ? SyS_read+0x230/0x230 [ 40.085263] ? do_syscall_64+0x53/0x640 [ 40.089224] ? SyS_read+0x230/0x230 [ 40.092840] do_syscall_64+0x1e8/0x640 [ 40.096720] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.101552] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 40.106730] RIP: 0033:0x441279 [ 40.109910] RSP: 002b:00007ffcbb3000c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 40.117608] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441279 [ 40.124866] RDX: 0000000000000002 RSI: 0000000020000380 RDI: 0000000000000003 [ 40.132123] RBP: 0000000000009b86 R08: 00000000004002c8 R09: 00000000004002c8 [ 40.139383] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000401ff0 [ 40.146644] R13: 0000000000402080 R14: 0000000000000000 R15: 0000000000000000 [ 40.155204] Kernel Offset: disabled [ 40.158881] Rebooting in 86400 seconds..