[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 31.627142] random: sshd: uninitialized urandom read (32 bytes read) [ 32.005485] kauditd_printk_skb: 9 callbacks suppressed [ 32.005493] audit: type=1400 audit(1564702695.426:35): avc: denied { map } for pid=6847 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 [ 32.060999] random: sshd: uninitialized urandom read (32 bytes read) [ 32.607811] random: sshd: uninitialized urandom read (32 bytes read) [ 53.151840] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.58' (ECDSA) to the list of known hosts. [ 58.702792] 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 [ 58.821451] audit: type=1400 audit(1564702722.246:36): avc: denied { map } for pid=6860 comm="syz-executor143" path="/root/syz-executor143938177" dev="sda1" ino=1426 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 60.052904] kobject_add_internal failed for hci1 (error: -2 parent: bluetooth) [ 60.052934] kobject_add_internal failed for hci4 (error: -2 parent: bluetooth) [ 60.067222] Bluetooth: Can't register HCI device [ 60.088752] 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 [ 61.256953] kasan: CONFIG_KASAN_INLINE enabled [ 61.275988] kasan: GPF could be caused by NULL-ptr deref or user memory access executing program [ 61.303755] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 61.304394] kobject: 'hci4' (ffff888094b76668): kobject_uevent_env [ 61.310031] Modules linked in: [ 61.310043] CPU: 1 PID: 7372 Comm: syz-executor143 Not tainted 4.14.135 #31 [ 61.310046] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.310050] task: ffff888096c5a440 task.stack: ffff8880a58d8000 [ 61.310063] RIP: 0010:kernfs_add_one+0x2cb/0x3a0 [ 61.310066] RSP: 0018:ffff8880a58df980 EFLAGS: 00010202 [ 61.310071] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000003 [ 61.310074] RDX: 0000000000000001 RSI: 0000000000000002 RDI: 0000000000000008 [ 61.310078] RBP: ffff8880a58df9b8 R08: fffffbfff12354d8 R09: ffff888096c5a440 [ 61.310082] R10: dffffc0000000000 R11: ffff888096c5a440 R12: ffff88809e96a9a0 [ 61.310086] R13: ffff88809e96a9a0 R14: 0000000000000000 R15: ffff88809e96a9c8 [ 61.310092] FS: 0000000000f75880(0000) GS:ffff8880aef00000(0000) knlGS:0000000000000000 [ 61.310095] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 executing program executing program [ 61.310099] CR2: 000000000043fc4a CR3: 0000000096d23000 CR4: 00000000001406e0 [ 61.310106] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 61.310110] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 61.310112] Call Trace: [ 61.310122] kernfs_create_dir_ns+0xea/0x140 [ 61.310129] sysfs_create_dir_ns+0xbe/0x1d0 [ 61.310139] kobject_add_internal.part.0.cold+0x114/0x5ae [ 61.310147] kobject_add+0x11f/0x180 [ 61.310153] ? kset_create_and_add+0x180/0x180 [ 61.310165] ? mutex_unlock+0xd/0x10 executing program [ 61.317357] kobject: 'hci1' (ffff888080326728): kobject_add_internal: parent: 'bluetooth', set: 'devices' [ 61.319688] device_add+0x383/0x1490 [ 61.319697] ? device_initialize+0x430/0x430 [ 61.319706] ? device_private_init+0x190/0x190 [ 61.328591] kobject: 'hci3' (ffff88807d4ea768): kobject_add_internal: parent: 'bluetooth', set: 'devices' [ 61.336149] ? up_write+0x1a/0x60 [ 61.336160] hci_register_dev+0x2d9/0x810 [ 61.336165] ? hci_init_sysfs+0x7c/0xa0 [ 61.336175] __vhci_create_device+0x2a6/0x560 [ 61.336181] vhci_write+0x2a1/0x437 [ 61.336190] __vfs_write+0x4a7/0x6b0 [ 61.336198] ? kernel_read+0x120/0x120 [ 61.342677] kobject: 'hci4' (ffff888094b76668): fill_kobj_path: path = '/devices/virtual/bluetooth/hci4' [ 61.347015] ? rw_verify_area+0xea/0x2b0 [ 61.347024] vfs_write+0x198/0x500 [ 61.347031] SyS_write+0xfd/0x230 [ 61.347038] ? SyS_read+0x230/0x230 [ 61.352603] kobject: 'hci1' (ffff888080326728): kobject_uevent_env [ 61.359640] ? do_syscall_64+0x53/0x640 [ 61.359648] ? SyS_read+0x230/0x230 [ 61.359655] do_syscall_64+0x1e8/0x640 [ 61.359661] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 61.359672] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 61.367372] kobject: 'hci4' (ffff888094b76668): kobject_cleanup, parent (null) [ 61.374183] RIP: 0033:0x441289 [ 61.374187] RSP: 002b:00007ffc9895ea08 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 61.374195] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441289 [ 61.374198] RDX: 0000000000000002 RSI: 0000000020000000 RDI: 0000000000000003 [ 61.374202] RBP: 000000000000ef25 R08: 00000000004002c8 R09: 00000000004002c8 [ 61.374205] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402000 [ 61.374208] R13: 0000000000402090 R14: 0000000000000000 R15: 0000000000000000 [ 61.374218] Code: [ 61.381688] kobject: 'hci3' (ffff88807d4ea768): kobject_uevent_env [ 61.388837] 70 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 9a 00 [ 61.397533] kobject: 'hci1' (ffff888080326728): fill_kobj_path: path = '/devices/virtual/bluetooth/hci1' [ 61.402944] 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 5b 70 48 8d 7b 08 48 89 fa 48 [ 61.410374] kobject: 'hci4' (ffff888094b76668): calling ktype release [ 61.417525] c1 ea 03 <0f> b6 04 02 84 c0 74 04 3c 03 7e 6e [ 61.425227] kobject: 'hci3' (ffff88807d4ea768): fill_kobj_path: path = '/devices/virtual/bluetooth/hci3' [ 61.427572] f6 43 08 01 0f 85 09 fe ff [ 61.427600] RIP: kernfs_add_one+0x2cb/0x3a0 RSP: ffff8880a58df980 [ 61.430814] kobject: 'hci4' (ffff88807d4367a8): kobject_add_internal: parent: 'bluetooth', set: 'devices' [ 61.433265] kobject: 'rfkill504' (ffff888095d42ee8): kobject_add_internal: parent: 'hci1', set: 'devices' [ 61.436948] kobject: 'hci5' (ffff8880952827e8): kobject_add_internal: parent: 'bluetooth', set: 'devices' [ 61.442908] kobject: 'hci4': free name [ 61.446335] kobject: 'hci4' (ffff88807d4367a8): kobject_uevent_env [ 61.452210] kobject: 'rfkill504' (ffff888095d42ee8): kobject_uevent_env [ 61.454683] kobject: 'hci5' (ffff8880952827e8): kobject_uevent_env [ 61.463996] kobject: 'rfkill504' (ffff888095d42ee8): fill_kobj_path: path = '/devices/virtual/bluetooth/hci1/rfkill504' [ 61.469597] kobject: 'hci4' (ffff88807d4367a8): fill_kobj_path: path = '/devices/virtual/bluetooth/hci4' [ 61.473858] kobject: 'hci6' (ffff888093d76828): kobject_add_internal: parent: 'bluetooth', set: 'devices' [ 61.477020] kobject: 'hci5' (ffff8880952827e8): fill_kobj_path: path = '/devices/virtual/bluetooth/hci5' [ 61.487596] kobject: 'rfkill505' (ffff888095d42668): kobject_add_internal: parent: 'hci3', set: 'devices' [ 61.492203] ---[ end trace b43566f41a9fd557 ]--- [ 61.496821] kobject: 'rfkill505' (ffff888095d42668): kobject_uevent_env [ 61.498740] Kernel panic - not syncing: Fatal exception [ 61.503670] kobject: 'rfkill504' (ffff888095d42ee8): kobject_uevent_env [ 61.507634] Kernel Offset: disabled [ 61.830938] Rebooting in 86400 seconds..