Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.30' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 56.675799][ T6803] IPVS: ftp: loaded support on port[0] = 21 [ 56.713659][ T6803] netlink: 24 bytes leftover after parsing attributes in process `syz-executor986'. [ 56.781635][ T6803] device veth1 entered promiscuous mode [ 56.821468][ T6803] ------------[ cut here ]------------ [ 56.827107][ T6803] WARNING: CPU: 0 PID: 6803 at net/core/dev.c:8992 rollback_registered_many+0xbdb/0xf60 [ 56.837751][ T6803] Kernel panic - not syncing: panic_on_warn set ... [ 56.844368][ T6803] CPU: 0 PID: 6803 Comm: syz-executor986 Not tainted 5.8.0-rc3-syzkaller #0 [ 56.853096][ T6803] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 56.864057][ T6803] Call Trace: [ 56.867407][ T6803] dump_stack+0x18f/0x20d [ 56.871730][ T6803] panic+0x2e3/0x75c [ 56.875729][ T6803] ? __warn_printk+0xf3/0xf3 [ 56.880305][ T6803] ? printk+0xba/0xed [ 56.884277][ T6803] ? log_store.cold+0x16/0x16 [ 56.888943][ T6803] ? do_syscall_64+0x60/0xe0 [ 56.893612][ T6803] ? __warn.cold+0x5/0x45 [ 56.897916][ T6803] ? __warn+0xd6/0x1f2 [ 56.901966][ T6803] ? rollback_registered_many+0xbdb/0xf60 [ 56.907659][ T6803] __warn.cold+0x20/0x45 [ 56.911986][ T6803] ? rollback_registered_many+0xbdb/0xf60 [ 56.917680][ T6803] report_bug+0x1bd/0x210 [ 56.921990][ T6803] handle_bug+0x38/0x90 [ 56.926121][ T6803] exc_invalid_op+0x13/0x40 [ 56.930601][ T6803] asm_exc_invalid_op+0x12/0x20 [ 56.935429][ T6803] RIP: 0010:rollback_registered_many+0xbdb/0xf60 [ 56.941917][ T6803] Code: 00 00 31 f6 4c 89 f7 e8 f3 d9 fc ff e9 4f fe ff ff 4c 89 e7 e9 48 fd ff ff e8 51 5d 3e fb 0f 0b e9 da fd ff ff e8 45 5d 3e fb <0f> 0b e9 18 fe ff ff e8 39 5d 3e fb 0f b6 2d 2e 24 74 04 31 ff 89 [ 56.961764][ T6803] RSP: 0018:ffffc90001ae6f60 EFLAGS: 00010293 [ 56.967811][ T6803] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff863557c5 [ 56.975765][ T6803] RDX: ffff8880a76780c0 RSI: ffffffff863559db RDI: 0000000000000005 [ 56.983715][ T6803] RBP: ffff888096abe0b8 R08: 0000000000000000 R09: ffffffff8a7b2fc7 [ 56.991662][ T6803] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809e3e8b00 [ 56.999733][ T6803] R13: 0000000000034960 R14: ffff888096abe000 R15: 0000000000000000 [ 57.007797][ T6803] ? rollback_registered_many+0x9c5/0xf60 [ 57.013499][ T6803] ? rollback_registered_many+0xbdb/0xf60 [ 57.019233][ T6803] ? dev_xdp_uninstall+0x3f0/0x3f0 [ 57.024331][ T6803] ? dev_set_mtu_ext+0x590/0x590 [ 57.029346][ T6803] unregister_netdevice_queue+0x2dd/0x570 [ 57.035856][ T6803] ? unregister_netdevice_many+0x50/0x50 [ 57.041497][ T6803] ? hsr_add_port+0x4f3/0x790 [ 57.046173][ T6803] hsr_dev_finalize+0x5ce/0x746 [ 57.051092][ T6803] hsr_newlink+0x27c/0x520 [ 57.055751][ T6803] ? hsr_dellink+0x70/0x70 [ 57.060219][ T6803] ? rtnl_create_link+0x184/0xad0 [ 57.065238][ T6803] ? hsr_dellink+0x70/0x70 [ 57.069641][ T6803] __rtnl_newlink+0x1090/0x1730 [ 57.074475][ T6803] ? rtnl_setlink+0x3c0/0x3c0 [ 57.079127][ T6803] ? lock_downgrade+0x820/0x820 [ 57.083971][ T6803] ? is_bpf_text_address+0xcb/0x160 [ 57.089171][ T6803] ? kernel_text_address+0xbd/0xf0 [ 57.094256][ T6803] ? __kernel_text_address+0x9/0x30 [ 57.099445][ T6803] ? unwind_get_return_address+0x51/0x90 [ 57.105054][ T6803] ? profile_setup.cold+0xc1/0xc1 [ 57.110099][ T6803] ? arch_stack_walk+0x97/0xf0 [ 57.114842][ T6803] ? stack_trace_save+0x8c/0xc0 [ 57.119666][ T6803] ? stack_trace_consume_entry+0x160/0x160 [ 57.125465][ T6803] ? mark_lock+0xbc/0x1710 [ 57.129877][ T6803] ? lock_is_held_type+0xb0/0xe0 [ 57.134791][ T6803] ? trace_kmalloc+0xfd/0x130 [ 57.139449][ T6803] ? kmem_cache_alloc_trace+0x168/0x2d0 [ 57.145927][ T6803] rtnl_newlink+0x64/0xa0 [ 57.150246][ T6803] ? __rtnl_newlink+0x1730/0x1730 [ 57.155259][ T6803] rtnetlink_rcv_msg+0x44e/0xad0 [ 57.160264][ T6803] ? rtnetlink_put_metrics+0x510/0x510 [ 57.165700][ T6803] ? lock_acquire+0x1f1/0xad0 [ 57.170355][ T6803] ? netlink_deliver_tap+0x146/0xb70 [ 57.175629][ T6803] netlink_rcv_skb+0x15a/0x430 [ 57.180386][ T6803] ? rtnetlink_put_metrics+0x510/0x510 [ 57.185992][ T6803] ? netlink_ack+0xa10/0xa10 [ 57.190579][ T6803] netlink_unicast+0x533/0x7d0 [ 57.195320][ T6803] ? netlink_attachskb+0x810/0x810 [ 57.200411][ T6803] ? _copy_from_iter_full+0x247/0x890 [ 57.205845][ T6803] ? __phys_addr+0x9a/0x110 [ 57.210584][ T6803] ? __phys_addr_symbol+0x2c/0x70 [ 57.215584][ T6803] ? __check_object_size+0x171/0x3e4 [ 57.220857][ T6803] netlink_sendmsg+0x856/0xd90 [ 57.225691][ T6803] ? netlink_unicast+0x7d0/0x7d0 [ 57.230619][ T6803] ? netlink_unicast+0x7d0/0x7d0 [ 57.235534][ T6803] sock_sendmsg+0xcf/0x120 [ 57.239928][ T6803] ____sys_sendmsg+0x6e8/0x810 [ 57.244673][ T6803] ? kernel_sendmsg+0x50/0x50 [ 57.249323][ T6803] ? do_recvmmsg+0x6d0/0x6d0 [ 57.253914][ T6803] ? __wake_up_common_lock+0xb4/0x130 [ 57.259259][ T6803] ? find_held_lock+0x2d/0x110 [ 57.264086][ T6803] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 57.270068][ T6803] ? __wake_up_common_lock+0xde/0x130 [ 57.275567][ T6803] ___sys_sendmsg+0xf3/0x170 [ 57.280160][ T6803] ? sendmsg_copy_msghdr+0x160/0x160 [ 57.285432][ T6803] ? lock_downgrade+0x820/0x820 [ 57.290265][ T6803] ? lock_downgrade+0x820/0x820 [ 57.295117][ T6803] ? __might_fault+0x190/0x1d0 [ 57.299883][ T6803] ? _copy_to_user+0x126/0x160 [ 57.304632][ T6803] ? move_addr_to_user+0xb5/0x200 [ 57.309637][ T6803] ? __fget_light+0x215/0x280 [ 57.316352][ T6803] __sys_sendmsg+0xe5/0x1b0 [ 57.321485][ T6803] ? __sys_sendmsg_sock+0xb0/0xb0 [ 57.326503][ T6803] ? do_syscall_64+0x1c/0xe0 [ 57.331076][ T6803] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 57.337034][ T6803] do_syscall_64+0x60/0xe0 [ 57.341970][ T6803] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 57.348312][ T6803] RIP: 0033:0x440e29 [ 57.353936][ T6803] Code: Bad RIP value. [ 57.358176][ T6803] RSP: 002b:00007ffd82615568 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 57.366579][ T6803] RAX: ffffffffffffffda RBX: 00000000004a25f0 RCX: 0000000000440e29 [ 57.374529][ T6803] RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003 [ 57.382478][ T6803] RBP: 00007ffd82615570 R08: 0000000120080522 R09: 0000000120080522 [ 57.390615][ T6803] R10: 0000000120080522 R11: 0000000000000246 R12: 00000000004a25f0 [ 57.398580][ T6803] R13: 00000000004023c0 R14: 0000000000000000 R15: 0000000000000000 [ 57.407987][ T6803] Kernel Offset: disabled [ 57.412373][ T6803] Rebooting in 86400 seconds..