Warning: Permanently added '10.128.1.15' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 29.780770] ================================================================== [ 29.788212] BUG: KASAN: use-after-free in pppol2tp_session_init+0x4b4/0x4d0 [ 29.795288] Read of size 8 at addr ffff888093557a28 by task syz-executor191/9100 [ 29.802791] [ 29.804396] CPU: 1 PID: 9100 Comm: syz-executor191 Not tainted 4.14.299-syzkaller #0 [ 29.812246] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 29.821571] Call Trace: [ 29.824137] dump_stack+0x1b2/0x281 [ 29.827738] print_address_description.cold+0x54/0x1d3 [ 29.832989] kasan_report_error.cold+0x8a/0x191 [ 29.837629] ? pppol2tp_session_init+0x4b4/0x4d0 [ 29.842358] __asan_report_load8_noabort+0x68/0x70 [ 29.847258] ? pppol2tp_session_init+0x4b4/0x4d0 [ 29.851992] pppol2tp_session_init+0x4b4/0x4d0 [ 29.856550] pppol2tp_connect+0xd5c/0x13d0 [ 29.860757] ? pppol2tp_recv_payload_hook+0x1a0/0x1a0 [ 29.865921] ? lock_acquire+0x170/0x3f0 [ 29.869866] ? lock_downgrade+0x740/0x740 [ 29.873989] ? security_socket_connect+0x83/0xb0 [ 29.878717] ? pppol2tp_recv_payload_hook+0x1a0/0x1a0 [ 29.883879] SyS_connect+0x1f4/0x240 [ 29.887563] ? SyS_accept+0x30/0x30 [ 29.891176] ? up_read+0x17/0x30 [ 29.894516] ? __do_page_fault+0x159/0xad0 [ 29.898721] ? do_syscall_64+0x4c/0x640 [ 29.902666] ? SyS_accept+0x30/0x30 [ 29.906267] do_syscall_64+0x1d5/0x640 [ 29.910128] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 29.915291] [ 29.916890] Allocated by task 9074: [ 29.920492] kasan_kmalloc+0xeb/0x160 [ 29.924271] kmem_cache_alloc+0x124/0x3c0 [ 29.928392] sk_prot_alloc+0x5f/0x290 [ 29.932163] sk_alloc+0x36/0xcd0 [ 29.935502] inet6_create+0x2df/0xe20 [ 29.939272] __sock_create+0x303/0x620 [ 29.943130] SyS_socket+0xd1/0x1b0 [ 29.946648] do_syscall_64+0x1d5/0x640 [ 29.950515] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 29.955672] [ 29.957269] Freed by task 9100: [ 29.960518] kasan_slab_free+0xc3/0x1a0 [ 29.964462] kmem_cache_free+0x7c/0x2b0 [ 29.968412] __sk_destruct+0x442/0x760 [ 29.972275] __sk_free+0xd9/0x2d0 [ 29.975700] sk_free+0x2b/0x40 [ 29.978863] l2tp_session_free+0x1a0/0x200 [ 29.983069] pppol2tp_session_destruct+0xcd/0x110 [ 29.987880] __sk_destruct+0x49/0x760 [ 29.991652] __sk_free+0xd9/0x2d0 [ 29.995081] sk_free+0x2b/0x40 [ 29.998249] pppol2tp_put_sk+0x4c/0x60 [ 30.002115] rcu_process_callbacks+0x780/0x1180 [ 30.006753] __do_softirq+0x24d/0x9ff [ 30.010520] [ 30.012119] The buggy address belongs to the object at ffff888093557800 [ 30.012119] which belongs to the cache UDPv6 of size 1728 [ 30.024312] The buggy address is located 552 bytes inside of [ 30.024312] 1728-byte region [ffff888093557800, ffff888093557ec0) [ 30.036242] The buggy address belongs to the page: [ 30.041144] page:ffffea00024d55c0 count:1 mapcount:0 mapping:ffff8880935570c0 index:0x0 [ 30.049258] flags: 0xfff00000000100(slab) [ 30.053379] raw: 00fff00000000100 ffff8880935570c0 0000000000000000 0000000100000002 [ 30.061230] raw: ffffea00024d5360 ffffea000253fca0 ffff888235412a80 0000000000000000 [ 30.069080] page dumped because: kasan: bad access detected [ 30.074758] [ 30.076356] Memory state around the buggy address: [ 30.081253] ffff888093557900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.088583] ffff888093557980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.095913] >ffff888093557a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.103242] ^ [ 30.107882] ffff888093557a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.115216] ffff888093557b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.122545] ================================================================== [ 30.129968] Disabling lock debugging due to kernel taint [ 30.139883] Kernel panic - not syncing: panic_on_warn set ... [ 30.139883] [ 30.139892] CPU: 0 PID: 9100 Comm: syz-executor191 Tainted: G B 4.14.299-syzkaller #0 [ 30.139900] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 30.165643] Call Trace: [ 30.168203] dump_stack+0x1b2/0x281 [ 30.171802] panic+0x1f9/0x42d [ 30.174963] ? add_taint.cold+0x16/0x16 [ 30.178911] ? ___preempt_schedule+0x16/0x18 [ 30.183290] kasan_end_report+0x43/0x49 [ 30.187233] kasan_report_error.cold+0xa7/0x191 [ 30.191878] ? pppol2tp_session_init+0x4b4/0x4d0 [ 30.196607] __asan_report_load8_noabort+0x68/0x70 [ 30.201505] ? pppol2tp_session_init+0x4b4/0x4d0 [ 30.206230] pppol2tp_session_init+0x4b4/0x4d0 [ 30.210780] pppol2tp_connect+0xd5c/0x13d0 [ 30.214989] ? pppol2tp_recv_payload_hook+0x1a0/0x1a0 [ 30.220152] ? lock_acquire+0x170/0x3f0 [ 30.224099] ? lock_downgrade+0x740/0x740 [ 30.228219] ? security_socket_connect+0x83/0xb0 [ 30.232942] ? pppol2tp_recv_payload_hook+0x1a0/0x1a0 [ 30.238101] SyS_connect+0x1f4/0x240 [ 30.241872] ? SyS_accept+0x30/0x30 [ 30.245469] ? up_read+0x17/0x30 [ 30.248807] ? __do_page_fault+0x159/0xad0 [ 30.253013] ? do_syscall_64+0x4c/0x640 [ 30.256957] ? SyS_accept+0x30/0x30 [ 30.260553] do_syscall_64+0x1d5/0x640 [ 30.264413] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 30.269642] Kernel Offset: disabled [ 30.273245] Rebooting in 86400 seconds..