Warning: Permanently added '10.128.1.16' (ECDSA) to the list of known hosts. syzkaller login: [ 65.170041][ T6854] IPVS: ftp: loaded support on port[0] = 21 [ 65.183834][ T6858] IPVS: ftp: loaded support on port[0] = 21 [ 65.184960][ T6856] IPVS: ftp: loaded support on port[0] = 21 [ 65.199762][ T6857] IPVS: ftp: loaded support on port[0] = 21 [ 65.212515][ T6855] IPVS: ftp: loaded support on port[0] = 21 [ 65.219443][ T6850] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 68.553805][ T2932] Bluetooth: hci4: command 0x0409 tx timeout [ 68.553812][ T3908] Bluetooth: hci0: command 0x0409 tx timeout [ 68.554175][ T2932] Bluetooth: hci1: command 0x0409 tx timeout [ 68.559954][ T3908] Bluetooth: hci3: command 0x0409 tx timeout [ 68.566738][ T2932] Bluetooth: hci2: command 0x0409 tx timeout [ 68.633109][ T3908] Bluetooth: hci5: command 0x0409 tx timeout [ 70.632700][ T2932] Bluetooth: hci1: command 0x041b tx timeout [ 70.638845][ T2932] Bluetooth: hci0: command 0x041b tx timeout [ 70.642635][ T3908] Bluetooth: hci2: command 0x041b tx timeout [ 70.646394][ T2932] Bluetooth: hci4: command 0x041b tx timeout [ 70.651158][ T3908] Bluetooth: hci3: command 0x041b tx timeout [ 70.722590][ T3908] Bluetooth: hci5: command 0x041b tx timeout [ 71.490351][ T7006] ================================================================== [ 71.498758][ T7006] BUG: KASAN: use-after-free in sco_chan_del+0xe6/0x430 [ 71.505700][ T7006] Write of size 4 at addr ffff88808d8d0010 by task syz-executor958/7006 [ 71.514015][ T7006] [ 71.516477][ T7006] CPU: 1 PID: 7006 Comm: syz-executor958 Not tainted 5.8.0-rc7-next-20200731-syzkaller #0 [ 71.526357][ T7006] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 71.536423][ T7006] Call Trace: executing program executing program executing program executing program executing program executing program executing program [ 71.539734][ T7006] dump_stack+0x18f/0x20d [ 71.544084][ T7006] ? sco_chan_del+0xe6/0x430 [ 71.548707][ T7006] ? sco_chan_del+0xe6/0x430 [ 71.553712][ T7006] print_address_description.constprop.0.cold+0xae/0x497 [ 71.560880][ T7006] ? sco_chan_del+0xab/0x430 [ 71.565498][ T7006] ? lockdep_hardirqs_off+0x7e/0xb0 [ 71.570732][ T7006] ? vprintk_func+0x97/0x1a6 [ 71.575507][ T7006] ? sco_chan_del+0xe6/0x430 [ 71.580132][ T7006] ? sco_chan_del+0xe6/0x430 [ 71.584755][ T7006] kasan_report.cold+0x1f/0x37 executing program executing program executing program executing program executing program executing program [ 71.589550][ T7006] ? sco_chan_del+0xe6/0x430 [ 71.594168][ T7006] check_memory_region+0x13d/0x180 [ 71.599426][ T7006] sco_chan_del+0xe6/0x430 [ 71.603879][ T7006] __sco_sock_close+0x16e/0x5b0 [ 71.608750][ T7006] sco_sock_release+0x69/0x290 [ 71.613532][ T7006] __sock_release+0xcd/0x280 [ 71.618147][ T7006] sock_close+0x18/0x20 [ 71.622320][ T7006] __fput+0x285/0x920 [ 71.626335][ T7006] ? __sock_release+0x280/0x280 [ 71.631218][ T7006] task_work_run+0xdd/0x190 [ 71.635758][ T7006] do_exit+0xb7d/0x29f0 executing program executing program executing program executing program executing program executing program executing program executing program [ 71.639957][ T7006] ? lock_acquire+0x1f1/0xad0 [ 71.644656][ T7006] ? find_held_lock+0x2d/0x110 [ 71.649453][ T7006] ? mm_update_next_owner+0x7a0/0x7a0 [ 71.654848][ T7006] ? get_signal+0x332/0x1ee0 [ 71.659460][ T7006] ? lock_downgrade+0x830/0x830 [ 71.664348][ T7006] ? lock_is_held_type+0xbb/0xf0 [ 71.669316][ T7006] do_group_exit+0x125/0x310 [ 71.673938][ T7006] get_signal+0x40b/0x1ee0 [ 71.678389][ T7006] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 71.684517][ T7006] ? sco_sock_connect+0x4e4/0x980 executing program executing program executing program executing program executing program executing program executing program executing program [ 71.689584][ T7006] ? lockdep_hardirqs_on+0x76/0xf0 [ 71.694725][ T7006] ? sco_sock_connect+0x4e4/0x980 [ 71.699776][ T7006] arch_do_signal+0x82/0x2520 [ 71.704484][ T7006] ? sco_sock_release+0x290/0x290 [ 71.709532][ T7006] ? __sys_connect_file+0x4e/0x1a0 [ 71.714679][ T7006] ? copy_siginfo_to_user32+0xa0/0xa0 [ 71.720071][ T7006] ? __sys_connect+0x109/0x190 [ 71.724862][ T7006] ? __sys_connect_file+0x1a0/0x1a0 [ 71.730095][ T7006] ? exit_to_user_mode_prepare+0xb9/0x1c0 [ 71.735844][ T7006] ? lockdep_hardirqs_on_prepare+0x354/0x530 executing program executing program executing program executing program executing program executing program executing program executing program [ 71.741860][ T7006] exit_to_user_mode_prepare+0x15d/0x1c0 [ 71.747530][ T7006] syscall_exit_to_user_mode+0x59/0x2b0 [ 71.753109][ T7006] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 71.759025][ T7006] RIP: 0033:0x446eb9 [ 71.762928][ T7006] Code: Bad RIP value. [ 71.767007][ T7006] RSP: 002b:00007ffc15d2b4f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 71.775527][ T7006] RAX: fffffffffffffffc RBX: 0000000000000000 RCX: 0000000000446eb9 [ 71.783520][ T7006] RDX: 0000000000000008 RSI: 0000000020000000 RDI: 0000000000000004 executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 71.791509][ T7006] RBP: 0000000000000004 R08: 0000000000000002 R09: 00000000000000ff [ 71.799504][ T7006] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000000 [ 71.807508][ T7006] R13: 0000000000407b10 R14: 0000000000000000 R15: 0000000000000000 [ 71.815516][ T7006] [ 71.817866][ T7006] Allocated by task 7006: [ 71.822230][ T7006] kasan_save_stack+0x1b/0x40 [ 71.826929][ T7006] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 71.832587][ T7006] kmem_cache_alloc_trace+0x16e/0x2c0 [ 71.837986][ T7006] hci_conn_add+0x53/0x1330 executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 71.842523][ T7006] hci_connect_sco+0x356/0x860 [ 71.847305][ T7006] sco_sock_connect+0x308/0x980 [ 71.852175][ T7006] __sys_connect_file+0x155/0x1a0 [ 71.857229][ T7006] __sys_connect+0x160/0x190 [ 71.861850][ T7006] __x64_sys_connect+0x6f/0xb0 [ 71.866644][ T7006] do_syscall_64+0x2d/0x70 [ 71.871084][ T7006] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 71.876986][ T7006] [ 71.879330][ T7006] Freed by task 7016: [ 71.883329][ T7006] kasan_save_stack+0x1b/0x40 [ 71.888023][ T7006] kasan_set_track+0x1c/0x30 executing program executing program executing program executing program executing program executing program executing program [ 71.892636][ T7006] kasan_set_free_info+0x1b/0x30 [ 71.897599][ T7006] __kasan_slab_free+0xd8/0x120 [ 71.902473][ T7006] kfree+0x103/0x2c0 [ 71.906389][ T7006] device_release+0x71/0x200 [ 71.911009][ T7006] kobject_put+0x171/0x270 [ 71.915446][ T7006] put_device+0x1b/0x30 [ 71.919618][ T7006] hci_conn_del+0x27e/0x6a0 [ 71.924143][ T7006] hci_phy_link_complete_evt.isra.0+0x508/0x790 [ 71.930407][ T7006] hci_event_packet+0x4696/0x87a8 [ 71.935587][ T7006] hci_rx_work+0x22e/0xb50 executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 71.940036][ T7006] process_one_work+0x94c/0x1670 [ 71.945000][ T7006] worker_thread+0x64c/0x1120 [ 71.949698][ T7006] kthread+0x3b5/0x4a0 [ 71.953794][ T7006] ret_from_fork+0x1f/0x30 [ 71.958218][ T7006] [ 71.960566][ T7006] The buggy address belongs to the object at ffff88808d8d0000 [ 71.960566][ T7006] which belongs to the cache kmalloc-4k of size 4096 [ 71.974655][ T7006] The buggy address is located 16 bytes inside of [ 71.974655][ T7006] 4096-byte region [ffff88808d8d0000, ffff88808d8d1000) executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 71.988030][ T7006] The buggy address belongs to the page: [ 71.993699][ T7006] page:00000000b5fc17c1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8d8d0 [ 72.003866][ T7006] head:00000000b5fc17c1 order:1 compound_mapcount:0 [ 72.010476][ T7006] flags: 0xfffe0000010200(slab|head) [ 72.015786][ T7006] raw: 00fffe0000010200 ffffea00024e7b08 ffffea00025c5208 ffff8880aa000900 [ 72.024398][ T7006] raw: 0000000000000000 ffff88808d8d0000 0000000100000001 0000000000000000 [ 72.032996][ T7006] page dumped because: kasan: bad access detected [ 72.039417][ T7006] executing program executing program executing program executing program executing program executing program executing program executing program [ 72.041760][ T7006] Memory state around the buggy address: [ 72.047404][ T7006] ffff88808d8cff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 72.055492][ T7006] ffff88808d8cff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 72.063581][ T7006] >ffff88808d8d0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 72.071654][ T7006] ^ [ 72.076261][ T7006] ffff88808d8d0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 72.084354][ T7006] ffff88808d8d0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 72.092549][ T7006] ================================================================== [ 72.100623][ T7006] Disabling lock debugging due to kernel taint [ 72.151887][ T7006] Kernel panic - not syncing: panic_on_warn set ... [ 72.158518][ T7006] CPU: 0 PID: 7006 Comm: syz-executor958 Tainted: G B 5.8.0-rc7-next-20200731-syzkaller #0 [ 72.169804][ T7006] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 72.179865][ T7006] Call Trace: [ 72.183168][ T7006] dump_stack+0x18f/0x20d [ 72.187512][ T7006] ? sco_chan_del+0x20/0x430 [ 72.192119][ T7006] panic+0x2e3/0x75c [ 72.196026][ T7006] ? __warn_printk+0xf3/0xf3 [ 72.200616][ T7006] ? preempt_schedule_common+0x59/0xc0 [ 72.206059][ T7006] ? sco_chan_del+0xe6/0x430 [ 72.210635][ T7006] ? preempt_schedule_thunk+0x16/0x18 [ 72.215986][ T7006] ? trace_hardirqs_on+0x55/0x220 [ 72.220991][ T7006] ? sco_chan_del+0xe6/0x430 [ 72.225565][ T7006] ? sco_chan_del+0xe6/0x430 [ 72.230140][ T7006] end_report+0x4d/0x53 [ 72.234290][ T7006] kasan_report.cold+0xd/0x37 [ 72.238948][ T7006] ? sco_chan_del+0xe6/0x430 [ 72.243584][ T7006] check_memory_region+0x13d/0x180 [ 72.248676][ T7006] sco_chan_del+0xe6/0x430 [ 72.253075][ T7006] __sco_sock_close+0x16e/0x5b0 [ 72.257907][ T7006] sco_sock_release+0x69/0x290 [ 72.262652][ T7006] __sock_release+0xcd/0x280 [ 72.267220][ T7006] sock_close+0x18/0x20 [ 72.271407][ T7006] __fput+0x285/0x920 [ 72.275372][ T7006] ? __sock_release+0x280/0x280 [ 72.280201][ T7006] task_work_run+0xdd/0x190 [ 72.284689][ T7006] do_exit+0xb7d/0x29f0 [ 72.288833][ T7006] ? lock_acquire+0x1f1/0xad0 [ 72.293495][ T7006] ? find_held_lock+0x2d/0x110 [ 72.298244][ T7006] ? mm_update_next_owner+0x7a0/0x7a0 [ 72.303595][ T7006] ? get_signal+0x332/0x1ee0 [ 72.308167][ T7006] ? lock_downgrade+0x830/0x830 [ 72.312999][ T7006] ? lock_is_held_type+0xbb/0xf0 [ 72.317923][ T7006] do_group_exit+0x125/0x310 [ 72.322494][ T7006] get_signal+0x40b/0x1ee0 [ 72.326895][ T7006] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 72.332856][ T7006] ? sco_sock_connect+0x4e4/0x980 [ 72.337863][ T7006] ? lockdep_hardirqs_on+0x76/0xf0 [ 72.342956][ T7006] ? sco_sock_connect+0x4e4/0x980 [ 72.347964][ T7006] arch_do_signal+0x82/0x2520 [ 72.352720][ T7006] ? sco_sock_release+0x290/0x290 [ 72.357724][ T7006] ? __sys_connect_file+0x4e/0x1a0 [ 72.362813][ T7006] ? copy_siginfo_to_user32+0xa0/0xa0 [ 72.368166][ T7006] ? __sys_connect+0x109/0x190 [ 72.372908][ T7006] ? __sys_connect_file+0x1a0/0x1a0 [ 72.378091][ T7006] ? exit_to_user_mode_prepare+0xb9/0x1c0 [ 72.383792][ T7006] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 72.389753][ T7006] exit_to_user_mode_prepare+0x15d/0x1c0 [ 72.395365][ T7006] syscall_exit_to_user_mode+0x59/0x2b0 [ 72.400890][ T7006] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 72.406760][ T7006] RIP: 0033:0x446eb9 [ 72.410630][ T7006] Code: Bad RIP value. [ 72.414673][ T7006] RSP: 002b:00007ffc15d2b4f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 72.423062][ T7006] RAX: fffffffffffffffc RBX: 0000000000000000 RCX: 0000000000446eb9 [ 72.431013][ T7006] RDX: 0000000000000008 RSI: 0000000020000000 RDI: 0000000000000004 [ 72.438963][ T7006] RBP: 0000000000000004 R08: 0000000000000002 R09: 00000000000000ff [ 72.446915][ T7006] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000000 [ 72.454871][ T7006] R13: 0000000000407b10 R14: 0000000000000000 R15: 0000000000000000 [ 72.463943][ T7006] Kernel Offset: disabled [ 72.468263][ T7006] Rebooting in 86400 seconds..