Warning: Permanently added '10.128.0.219' (ECDSA) to the list of known hosts. syzkaller login: [ 44.617466][ T6829] IPVS: ftp: loaded support on port[0] = 21 [ 44.618144][ T6833] IPVS: ftp: loaded support on port[0] = 21 [ 44.637983][ T6835] IPVS: ftp: loaded support on port[0] = 21 [ 44.646813][ T6834] IPVS: ftp: loaded support on port[0] = 21 [ 44.647535][ T6837] IPVS: ftp: loaded support on port[0] = 21 [ 44.668014][ T6836] 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 [ 47.888491][ T5] Bluetooth: hci0: command 0x0409 tx timeout [ 47.977989][ T3611] Bluetooth: hci1: command 0x0409 tx timeout [ 47.984228][ T3611] Bluetooth: hci4: command 0x0409 tx timeout [ 47.991205][ T3611] Bluetooth: hci3: command 0x0409 tx timeout [ 47.997253][ T3611] Bluetooth: hci2: command 0x0409 tx timeout [ 48.004142][ T3611] Bluetooth: hci5: command 0x0409 tx timeout [ 49.977378][ T3611] Bluetooth: hci0: command 0x041b tx timeout [ 50.058831][ T3611] Bluetooth: hci5: command 0x041b tx timeout [ 50.064896][ T3611] Bluetooth: hci2: command 0x041b tx timeout [ 50.072078][ T3611] Bluetooth: hci3: command 0x041b tx timeout [ 50.079007][ T3611] Bluetooth: hci4: command 0x041b tx timeout [ 50.085451][ T3611] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 50.938081][ T6993] ================================================================== [ 50.946263][ T6993] BUG: KASAN: use-after-free in __sco_sock_close+0x47c/0xed0 [ 50.953638][ T6993] Write of size 4 at addr ffff8880a833e010 by task syz-executor389/6993 [ 50.961951][ T6993] [ 50.964286][ T6993] CPU: 1 PID: 6993 Comm: syz-executor389 Not tainted 5.8.0-syzkaller #0 [ 50.972600][ T6993] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.982759][ T6993] Call Trace: executing program executing program executing program executing program executing program executing program executing program executing program [ 50.986054][ T6993] dump_stack+0x1f0/0x31e [ 50.990394][ T6993] print_address_description+0x66/0x5a0 [ 50.995952][ T6993] ? printk+0x62/0x83 [ 50.999938][ T6993] ? vprintk_emit+0x339/0x3c0 [ 51.004621][ T6993] kasan_report+0x132/0x1d0 [ 51.009249][ T6993] ? __sco_sock_close+0x47c/0xed0 [ 51.014286][ T6993] check_memory_region+0x2b5/0x2f0 [ 51.019440][ T6993] __sco_sock_close+0x47c/0xed0 [ 51.024295][ T6993] ? lockdep_hardirqs_on+0x49/0xf0 [ 51.029410][ T6993] sco_sock_release+0x63/0x4f0 [ 51.034177][ T6993] ? down_write+0xcd/0x130 executing program executing program executing program executing program executing program executing program executing program executing program [ 51.038605][ T6993] sock_close+0xd8/0x260 [ 51.042848][ T6993] ? sock_mmap+0x90/0x90 [ 51.047090][ T6993] __fput+0x2f0/0x750 [ 51.051079][ T6993] task_work_run+0x137/0x1c0 [ 51.055674][ T6993] do_exit+0x5f3/0x1f20 [ 51.059841][ T6993] ? trace_lock_release+0x137/0x1a0 [ 51.065055][ T6993] do_group_exit+0x161/0x2d0 [ 51.069647][ T6993] get_signal+0x139b/0x1d30 [ 51.074180][ T6993] do_signal+0x33/0x610 [ 51.078346][ T6993] ? __prepare_exit_to_usermode+0x6d/0x1b0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 51.084194][ T6993] __prepare_exit_to_usermode+0xc3/0x1b0 [ 51.089826][ T6993] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 51.095892][ T6993] do_syscall_64+0x7f/0xe0 [ 51.100312][ T6993] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 51.106204][ T6993] RIP: 0033:0x446eb9 [ 51.110089][ T6993] Code: Bad RIP value. [ 51.114150][ T6993] RSP: 002b:00007fff22783008 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 51.122555][ T6993] RAX: fffffffffffffffc RBX: 0000000000000000 RCX: 0000000000446eb9 [ 51.130522][ T6993] RDX: 0000000000000008 RSI: 0000000020000540 RDI: 0000000000000004 executing program executing program executing program executing program executing program executing program [ 51.138489][ T6993] RBP: 0000000000000004 R08: 0000000000000002 R09: 00000000000500ff [ 51.146459][ T6993] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000000 [ 51.154429][ T6993] R13: 0000000000407b10 R14: 0000000000000000 R15: 0000000000000000 [ 51.163452][ T6993] [ 51.165772][ T6993] Allocated by task 6993: [ 51.170108][ T6993] __kasan_kmalloc+0x103/0x140 [ 51.174867][ T6993] kmem_cache_alloc_trace+0x234/0x300 [ 51.180234][ T6993] hci_conn_add+0x5d/0x1040 [ 51.184750][ T6993] hci_connect_sco+0x29a/0xa10 [ 51.189506][ T6993] sco_sock_connect+0x2de/0xaa0 [ 51.194355][ T6993] __sys_connect+0x2da/0x360 [ 51.198941][ T6993] __x64_sys_connect+0x76/0x80 [ 51.203698][ T6993] do_syscall_64+0x73/0xe0 [ 51.208109][ T6993] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 51.214013][ T6993] [ 51.217275][ T6993] Freed by task 6975: [ 51.221235][ T6993] __kasan_slab_free+0x114/0x170 [ 51.226151][ T6993] kfree+0x10a/0x220 [ 51.230030][ T6993] device_release+0x70/0x1a0 [ 51.234612][ T6993] kobject_put+0x15b/0x220 [ 51.239050][ T6993] hci_conn_del+0x2c2/0x550 [ 51.243551][ T6993] hci_event_packet+0x8335/0x18260 [ 51.248659][ T6993] hci_rx_work+0x236/0x9c0 [ 51.253103][ T6993] process_one_work+0x789/0xfc0 [ 51.257951][ T6993] worker_thread+0xaa4/0x1460 [ 51.262616][ T6993] kthread+0x37e/0x3a0 [ 51.266661][ T6993] ret_from_fork+0x1f/0x30 [ 51.271051][ T6993] [ 51.273357][ T6993] The buggy address belongs to the object at ffff8880a833e000 [ 51.273357][ T6993] which belongs to the cache kmalloc-4k of size 4096 [ 51.287408][ T6993] The buggy address is located 16 bytes inside of [ 51.287408][ T6993] 4096-byte region [ffff8880a833e000, ffff8880a833f000) [ 51.300672][ T6993] The buggy address belongs to the page: [ 51.306305][ T6993] page:ffffea0002a0cf80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 head:ffffea0002a0cf80 order:1 compound_mapcount:0 [ 51.319727][ T6993] flags: 0xfffe0000010200(slab|head) [ 51.325018][ T6993] raw: 00fffe0000010200 ffffea00029f1308 ffffea0002454e88 ffff8880aa402000 [ 51.333596][ T6993] raw: 0000000000000000 ffff8880a833e000 0000000100000001 0000000000000000 [ 51.342164][ T6993] page dumped because: kasan: bad access detected [ 51.348560][ T6993] [ 51.350883][ T6993] Memory state around the buggy address: [ 51.356511][ T6993] ffff8880a833df00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 51.364600][ T6993] ffff8880a833df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 51.372636][ T6993] >ffff8880a833e000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.380669][ T6993] ^ [ 51.385231][ T6993] ffff8880a833e080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.393273][ T6993] ffff8880a833e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.401322][ T6993] ================================================================== [ 51.409385][ T6993] Disabling lock debugging due to kernel taint [ 51.416350][ T6993] Kernel panic - not syncing: panic_on_warn set ... [ 51.422941][ T6993] CPU: 1 PID: 6993 Comm: syz-executor389 Tainted: G B 5.8.0-syzkaller #0 [ 51.432684][ T6993] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.442730][ T6993] Call Trace: [ 51.446016][ T6993] dump_stack+0x1f0/0x31e [ 51.450343][ T6993] panic+0x264/0x7a0 [ 51.454235][ T6993] ? trace_hardirqs_on+0x30/0x80 [ 51.459159][ T6993] kasan_report+0x1c9/0x1d0 [ 51.463635][ T6993] ? __sco_sock_close+0x47c/0xed0 [ 51.468652][ T6993] check_memory_region+0x2b5/0x2f0 [ 51.473750][ T6993] __sco_sock_close+0x47c/0xed0 [ 51.478592][ T6993] ? lockdep_hardirqs_on+0x49/0xf0 [ 51.483699][ T6993] sco_sock_release+0x63/0x4f0 [ 51.488437][ T6993] ? down_write+0xcd/0x130 [ 51.492825][ T6993] sock_close+0xd8/0x260 [ 51.497060][ T6993] ? sock_mmap+0x90/0x90 [ 51.501293][ T6993] __fput+0x2f0/0x750 [ 51.505268][ T6993] task_work_run+0x137/0x1c0 [ 51.509833][ T6993] do_exit+0x5f3/0x1f20 [ 51.513964][ T6993] ? trace_lock_release+0x137/0x1a0 [ 51.519138][ T6993] do_group_exit+0x161/0x2d0 [ 51.523702][ T6993] get_signal+0x139b/0x1d30 [ 51.528185][ T6993] do_signal+0x33/0x610 [ 51.532328][ T6993] ? __prepare_exit_to_usermode+0x6d/0x1b0 [ 51.538118][ T6993] __prepare_exit_to_usermode+0xc3/0x1b0 [ 51.544693][ T6993] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 51.550814][ T6993] do_syscall_64+0x7f/0xe0 [ 51.555213][ T6993] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 51.561114][ T6993] RIP: 0033:0x446eb9 [ 51.564997][ T6993] Code: Bad RIP value. [ 51.569059][ T6993] RSP: 002b:00007fff22783008 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 51.577469][ T6993] RAX: fffffffffffffffc RBX: 0000000000000000 RCX: 0000000000446eb9 [ 51.585453][ T6993] RDX: 0000000000000008 RSI: 0000000020000540 RDI: 0000000000000004 [ 51.593416][ T6993] RBP: 0000000000000004 R08: 0000000000000002 R09: 00000000000500ff [ 51.601362][ T6993] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000000 [ 51.609323][ T6993] R13: 0000000000407b10 R14: 0000000000000000 R15: 0000000000000000 [ 51.618407][ T6993] Kernel Offset: disabled [ 51.622767][ T6993] Rebooting in 86400 seconds..