Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.81' (ECDSA) to the list of known hosts. syzkaller login: [ 44.355405][ T6836] IPVS: ftp: loaded support on port[0] = 21 [ 44.369092][ T6832] IPVS: ftp: loaded support on port[0] = 21 [ 44.371205][ T6838] IPVS: ftp: loaded support on port[0] = 21 [ 44.386058][ T6840] IPVS: ftp: loaded support on port[0] = 21 [ 44.395492][ T6837] IPVS: ftp: loaded support on port[0] = 21 [ 44.403301][ T6839] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 47.650150][ T2511] Bluetooth: hci1: command 0x0409 tx timeout [ 47.650156][ T3821] Bluetooth: hci2: command 0x0409 tx timeout [ 47.670709][ T3821] Bluetooth: hci0: command 0x0409 tx timeout executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 47.729324][ T2511] Bluetooth: hci4: command 0x0409 tx timeout [ 47.735838][ T2511] Bluetooth: hci5: command 0x0405 tx timeout [ 47.747225][ T2511] Bluetooth: hci3: command 0x0409 tx timeout executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 49.728427][ T2511] Bluetooth: hci0: command 0x041b tx timeout [ 49.734475][ T2511] Bluetooth: hci2: command 0x041b tx timeout [ 49.751013][ T2511] Bluetooth: hci1: command 0x041b tx timeout executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 49.808351][ T2511] Bluetooth: hci4: command 0x041b tx timeout [ 49.808868][ T3821] Bluetooth: hci3: command 0x041b tx timeout [ 49.822956][ T3821] Bluetooth: hci5: command 0x0409 tx timeout executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 50.630292][ T6982] ================================================================== [ 50.638539][ T6982] BUG: KASAN: use-after-free in __sco_sock_close+0x47c/0xed0 [ 50.645942][ T6982] Write of size 4 at addr ffff88809172e010 by task syz-executor843/6982 [ 50.654265][ T6982] [ 50.656583][ T6982] CPU: 0 PID: 6982 Comm: syz-executor843 Not tainted 5.8.0-syzkaller #0 [ 50.664882][ T6982] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.674931][ T6982] Call Trace: executing program executing program executing program executing program executing program executing program [ 50.678233][ T6982] dump_stack+0x1f0/0x31e [ 50.682584][ T6982] print_address_description+0x66/0x5a0 [ 50.688139][ T6982] ? vprintk_emit+0x342/0x3c0 [ 50.692820][ T6982] ? printk+0x62/0x83 [ 50.696800][ T6982] ? vprintk_emit+0x339/0x3c0 [ 50.701480][ T6982] kasan_report+0x132/0x1d0 [ 50.705973][ T6982] ? __sco_sock_close+0x47c/0xed0 [ 50.710976][ T6982] check_memory_region+0x2b5/0x2f0 [ 50.716086][ T6982] __sco_sock_close+0x47c/0xed0 [ 50.720939][ T6982] ? local_bh_enable+0x5/0x20 [ 50.725622][ T6982] sco_sock_release+0x63/0x4f0 executing program [ 50.730364][ T6982] ? down_write+0xcd/0x130 [ 50.734760][ T6982] sock_close+0xd8/0x260 [ 50.738980][ T6982] ? sock_mmap+0x90/0x90 [ 50.743297][ T6982] __fput+0x2f0/0x750 [ 50.747270][ T6982] task_work_run+0x137/0x1c0 [ 50.751877][ T6982] do_exit+0x601/0x1f80 [ 50.756031][ T6982] do_group_exit+0x161/0x2d0 [ 50.760618][ T6982] get_signal+0x139b/0x1d30 [ 50.765115][ T6982] do_signal+0x33/0x610 [ 50.769301][ T6982] ? __prepare_exit_to_usermode+0x81/0x1e0 [ 50.775095][ T6982] __prepare_exit_to_usermode+0xd7/0x1e0 [ 50.780796][ T6982] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 50.786878][ T6982] do_syscall_64+0x7f/0xe0 [ 50.791304][ T6982] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 50.797186][ T6982] RIP: 0033:0x446eb9 [ 50.801066][ T6982] Code: Bad RIP value. [ 50.805120][ T6982] RSP: 002b:00007ffdbc2798f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 50.813500][ T6982] RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 0000000000446eb9 [ 50.821457][ T6982] RDX: 0000000000000008 RSI: 0000000020000080 RDI: 0000000000000004 [ 50.829416][ T6982] RBP: 0000000000000004 R08: 0000000000000002 R09: 00000000000000ff [ 50.837366][ T6982] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000000 [ 50.845323][ T6982] R13: 0000000000407b10 R14: 0000000000000000 R15: 0000000000000000 [ 50.853300][ T6982] [ 50.855612][ T6982] Allocated by task 6982: [ 50.859952][ T6982] __kasan_kmalloc+0x103/0x140 [ 50.864712][ T6982] kmem_cache_alloc_trace+0x234/0x300 [ 50.870078][ T6982] hci_conn_add+0x5d/0x1040 [ 50.874570][ T6982] hci_connect_sco+0x29a/0xa10 [ 50.879307][ T6982] sco_sock_connect+0x2de/0xaa0 [ 50.884135][ T6982] __sys_connect+0x2da/0x360 [ 50.888732][ T6982] __x64_sys_connect+0x76/0x80 [ 50.893497][ T6982] do_syscall_64+0x73/0xe0 [ 50.897894][ T6982] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 50.903798][ T6982] [ 50.906141][ T6982] Freed by task 6977: [ 50.910092][ T6982] __kasan_slab_free+0x114/0x170 [ 50.915129][ T6982] kfree+0x10a/0x220 [ 50.919006][ T6982] device_release+0x70/0x1a0 [ 50.923572][ T6982] kobject_put+0x15b/0x220 [ 50.927985][ T6982] hci_conn_del+0x2c2/0x550 [ 50.932470][ T6982] hci_event_packet+0x8335/0x18260 [ 50.937556][ T6982] hci_rx_work+0x236/0x9c0 [ 50.941949][ T6982] process_one_work+0x789/0xfc0 [ 50.946840][ T6982] worker_thread+0xaa4/0x1460 [ 50.951496][ T6982] kthread+0x37e/0x3a0 [ 50.955606][ T6982] ret_from_fork+0x1f/0x30 [ 50.960028][ T6982] [ 50.962352][ T6982] The buggy address belongs to the object at ffff88809172e000 [ 50.962352][ T6982] which belongs to the cache kmalloc-4k of size 4096 [ 50.976387][ T6982] The buggy address is located 16 bytes inside of [ 50.976387][ T6982] 4096-byte region [ffff88809172e000, ffff88809172f000) [ 50.989627][ T6982] The buggy address belongs to the page: [ 50.995236][ T6982] page:ffffea000245cb80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 head:ffffea000245cb80 order:1 compound_mapcount:0 [ 51.008664][ T6982] flags: 0xfffe0000010200(slab|head) [ 51.013921][ T6982] raw: 00fffe0000010200 ffffea00029ac188 ffffea00029bc908 ffff8880aa402000 [ 51.022499][ T6982] raw: 0000000000000000 ffff88809172e000 0000000100000001 0000000000000000 [ 51.031065][ T6982] page dumped because: kasan: bad access detected [ 51.037458][ T6982] [ 51.039764][ T6982] Memory state around the buggy address: [ 51.045386][ T6982] ffff88809172df00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 51.053442][ T6982] ffff88809172df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 51.061488][ T6982] >ffff88809172e000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.069517][ T6982] ^ [ 51.074096][ T6982] ffff88809172e080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.082161][ T6982] ffff88809172e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.090202][ T6982] ================================================================== [ 51.098251][ T6982] Disabling lock debugging due to kernel taint [ 51.117682][ T6982] Kernel panic - not syncing: panic_on_warn set ... [ 51.124282][ T6982] CPU: 0 PID: 6982 Comm: syz-executor843 Tainted: G B 5.8.0-syzkaller #0 [ 51.133990][ T6982] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.144031][ T6982] Call Trace: [ 51.147310][ T6982] dump_stack+0x1f0/0x31e [ 51.151636][ T6982] panic+0x264/0x7a0 [ 51.155522][ T6982] ? trace_hardirqs_on+0x30/0x80 [ 51.160472][ T6982] kasan_report+0x1c9/0x1d0 [ 51.164987][ T6982] ? __sco_sock_close+0x47c/0xed0 [ 51.170035][ T6982] check_memory_region+0x2b5/0x2f0 [ 51.175153][ T6982] __sco_sock_close+0x47c/0xed0 [ 51.179999][ T6982] ? local_bh_enable+0x5/0x20 [ 51.184666][ T6982] sco_sock_release+0x63/0x4f0 [ 51.189422][ T6982] ? down_write+0xcd/0x130 [ 51.193817][ T6982] sock_close+0xd8/0x260 [ 51.198041][ T6982] ? sock_mmap+0x90/0x90 [ 51.202288][ T6982] __fput+0x2f0/0x750 [ 51.206281][ T6982] task_work_run+0x137/0x1c0 [ 51.210853][ T6982] do_exit+0x601/0x1f80 [ 51.214982][ T6982] do_group_exit+0x161/0x2d0 [ 51.219545][ T6982] get_signal+0x139b/0x1d30 [ 51.224030][ T6982] do_signal+0x33/0x610 [ 51.228181][ T6982] ? __prepare_exit_to_usermode+0x81/0x1e0 [ 51.233957][ T6982] __prepare_exit_to_usermode+0xd7/0x1e0 [ 51.239565][ T6982] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 51.245616][ T6982] do_syscall_64+0x7f/0xe0 [ 51.250006][ T6982] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 51.255869][ T6982] RIP: 0033:0x446eb9 [ 51.259731][ T6982] Code: Bad RIP value. [ 51.263766][ T6982] RSP: 002b:00007ffdbc2798f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 51.272143][ T6982] RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 0000000000446eb9 [ 51.280090][ T6982] RDX: 0000000000000008 RSI: 0000000020000080 RDI: 0000000000000004 [ 51.288051][ T6982] RBP: 0000000000000004 R08: 0000000000000002 R09: 00000000000000ff [ 51.296014][ T6982] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000000 [ 51.303972][ T6982] R13: 0000000000407b10 R14: 0000000000000000 R15: 0000000000000000 [ 51.313038][ T6982] Kernel Offset: disabled [ 51.317349][ T6982] Rebooting in 86400 seconds..