Warning: Permanently added '10.128.0.83' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 39.171938] netlink: 'syz-executor996': attribute type 3 has an invalid length. [ 39.179542] netlink: 'syz-executor996': attribute type 2 has an invalid length. [ 39.187475] WARNING: CPU: 1 PID: 6003 at net/netfilter/nfnetlink_cttimeout.c:478 cttimeout_default_get+0x1df/0xb30 [ 39.198020] Kernel panic - not syncing: panic_on_warn set ... [ 39.203894] CPU: 1 PID: 6003 Comm: syz-executor996 Not tainted 4.20.0-rc2+ #238 [ 39.211425] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.220764] Call Trace: [ 39.223342] dump_stack+0x244/0x39d [ 39.226967] ? dump_stack_print_info.cold.1+0x20/0x20 [ 39.232152] panic+0x2ad/0x55c [ 39.235332] ? add_taint.cold.5+0x16/0x16 [ 39.239465] ? __warn.cold.8+0x5/0x45 [ 39.243247] ? __warn+0xe8/0x1d0 [ 39.246622] ? cttimeout_default_get+0x1df/0xb30 [ 39.251363] __warn.cold.8+0x20/0x45 [ 39.255061] ? rcu_softirq_qs+0x20/0x20 [ 39.259017] ? cttimeout_default_get+0x1df/0xb30 [ 39.263757] report_bug+0x254/0x2d0 [ 39.267369] do_error_trap+0x11b/0x200 [ 39.271268] do_invalid_op+0x36/0x40 [ 39.274995] ? cttimeout_default_get+0x1df/0xb30 [ 39.279738] invalid_op+0x14/0x20 [ 39.283185] RIP: 0010:cttimeout_default_get+0x1df/0xb30 [ 39.288531] Code: 00 0f 87 8d 00 00 00 41 80 ff 06 0f 84 94 07 00 00 41 80 ff 11 0f 84 6c 07 00 00 41 80 ff 01 0f 84 44 07 00 00 e8 91 f1 20 fb <0f> 0b 41 bd a1 ff ff ff eb 06 41 bd a1 ff ff ff e8 7c f1 20 fb 48 [ 39.307412] RSP: 0018:ffff8881b611f260 EFLAGS: 00010293 [ 39.312763] RAX: ffff8881c2238080 RBX: ffffffff88bf58e0 RCX: ffffffff865e961c [ 39.320011] RDX: 0000000000000000 RSI: ffffffff865e964f RDI: 0000000000000001 [ 39.327261] RBP: ffff8881b611f370 R08: ffff8881c2238080 R09: ffffed103b5e5b67 [ 39.334527] R10: 0000000000000002 R11: ffff8881daf2db3b R12: 0000000000000088 [ 39.341791] R13: ffff8881cc63c080 R14: 0000000000000000 R15: 0000000000000088 [ 39.349052] ? cttimeout_default_get+0x1ac/0xb30 [ 39.353791] ? cttimeout_default_get+0x1df/0xb30 [ 39.358534] ? lock_downgrade+0x900/0x900 [ 39.362665] ? check_preemption_disabled+0x48/0x280 [ 39.367664] ? cttimeout_new_timeout+0x8c0/0x8c0 [ 39.372413] ? __lock_is_held+0xb5/0x140 [ 39.376459] ? cttimeout_new_timeout+0x8c0/0x8c0 [ 39.381198] nfnetlink_rcv_msg+0xdd3/0x10c0 [ 39.385512] ? nfnetlink_bind+0x3b0/0x3b0 [ 39.389646] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.395164] ? refcount_sub_and_test_checked+0x203/0x310 [ 39.400596] ? refcount_inc_not_zero_checked+0x2f0/0x2f0 [ 39.406032] ? netlink_deliver_tap+0x32e/0xf80 [ 39.410596] ? lock_downgrade+0x900/0x900 [ 39.414734] ? check_preemption_disabled+0x48/0x280 [ 39.419740] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 39.425268] ? apparmor_capable+0x355/0x6c0 [ 39.429600] ? rcu_softirq_qs+0x20/0x20 [ 39.433560] ? apparmor_cred_transfer+0x590/0x590 [ 39.438386] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.443920] netlink_rcv_skb+0x172/0x440 [ 39.447965] ? nfnetlink_bind+0x3b0/0x3b0 [ 39.452111] ? netlink_ack+0xb80/0xb80 [ 39.456034] ? __netlink_ns_capable+0x100/0x130 [ 39.460699] nfnetlink_rcv+0x1c0/0x4d0 [ 39.464572] ? nfnetlink_rcv_batch+0x19b0/0x19b0 [ 39.469315] ? kasan_check_write+0x14/0x20 [ 39.473551] netlink_unicast+0x5a5/0x760 [ 39.477614] ? netlink_attachskb+0x9a0/0x9a0 [ 39.482035] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.487558] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 39.492561] netlink_sendmsg+0xa18/0xfc0 [ 39.496647] ? move_addr_to_kernel.part.18+0xc6/0x100 [ 39.501820] ? netlink_unicast+0x760/0x760 [ 39.506039] ? aa_sock_msg_perm.isra.14+0xba/0x160 [ 39.510966] ? apparmor_socket_sendmsg+0x29/0x30 [ 39.515707] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.521231] ? security_socket_sendmsg+0x94/0xc0 [ 39.525968] ? netlink_unicast+0x760/0x760 [ 39.530183] sock_sendmsg+0xd5/0x120 [ 39.533884] ___sys_sendmsg+0x7fd/0x930 [ 39.537880] ? vmf_insert_mixed_mkwrite+0x40/0x40 [ 39.542704] ? copy_msghdr_from_user+0x580/0x580 [ 39.547444] ? __fd_install+0x2b5/0x8f0 [ 39.551398] ? lock_downgrade+0x900/0x900 [ 39.555529] ? zap_class+0x640/0x640 [ 39.559247] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.564764] ? __fget_light+0x2e9/0x430 [ 39.568736] ? fget_raw+0x20/0x20 [ 39.572178] ? __do_page_fault+0x620/0xe60 [ 39.576401] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 39.581924] ? sockfd_lookup_light+0xc5/0x160 [ 39.586406] __sys_sendmsg+0x11d/0x280 [ 39.590278] ? __ia32_sys_shutdown+0x80/0x80 [ 39.594670] ? up_read+0x225/0x2c0 [ 39.598195] ? do_fast_syscall_32+0x150/0xfb2 [ 39.602676] ? do_fast_syscall_32+0x150/0xfb2 [ 39.607159] ? trace_hardirqs_off_caller+0x310/0x310 [ 39.612242] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.617761] ? __do_page_fault+0x491/0xe60 [ 39.621978] __ia32_compat_sys_sendmsg+0x7a/0xb0 [ 39.626720] do_fast_syscall_32+0x34d/0xfb2 [ 39.631029] ? do_int80_syscall_32+0x890/0x890 [ 39.635596] ? entry_SYSENTER_compat+0x68/0x7f [ 39.640160] ? trace_hardirqs_off_caller+0xbb/0x310 [ 39.645160] ? syscall_return_slowpath+0x5e0/0x5e0 [ 39.650068] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.654935] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.659769] ? trace_hardirqs_on_caller+0x310/0x310 [ 39.664771] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 39.669768] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.675291] ? prepare_exit_to_usermode+0x291/0x3b0 [ 39.680291] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.685122] entry_SYSENTER_compat+0x70/0x7f [ 39.689510] RIP: 0023:0xf7f01a29 [ 39.692863] Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 14 24 c3 8b 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 39.711747] RSP: 002b:00000000ff94defc EFLAGS: 00000213 ORIG_RAX: 0000000000000172 [ 39.719435] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020dddfc8 [ 39.726684] RDX: 0000000000000000 RSI: 00000000080ea078 RDI: 00000000ff94df50 [ 39.733939] RBP: 0000000000001000 R08: 0000000000000000 R09: 0000000000000000 [ 39.741189] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 39.748442] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 39.756706] Kernel Offset: disabled [ 39.760372] Rebooting in 86400 seconds..