[ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. Starting Load/Save RF Kill Switch Status... [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.18' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 62.077969][ T6813] IPVS: ftp: loaded support on port[0] = 21 [ 62.113844][ T6813] netlink: 24 bytes leftover after parsing attributes in process `syz-executor251'. [ 62.198509][ T6813] device veth1 entered promiscuous mode [ 62.239410][ C1] ------------[ cut here ]------------ [ 62.239415][ C1] WARNING: CPU: 1 PID: 6813 at net/core/dev.c:8992 rollback_registered_many+0xbdb/0xf60 [ 62.239418][ C1] Kernel panic - not syncing: panic_on_warn set ... [ 62.239422][ C1] CPU: 1 PID: 6813 Comm: syz-executor251 Not tainted 5.8.0-rc2-syzkaller #0 [ 62.239426][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.239427][ C1] Call Trace: [ 62.239429][ C1] dump_stack+0x18f/0x20d [ 62.239430][ C1] panic+0x2e3/0x75c [ 62.239432][ C1] ? __warn_printk+0xf3/0xf3 [ 62.239434][ C1] ? printk+0xba/0xed [ 62.239436][ C1] ? log_store.cold+0x16/0x16 [ 62.239438][ C1] ? __warn.cold+0x5/0x45 [ 62.239440][ C1] ? __warn+0xd6/0x1f2 [ 62.239442][ C1] ? rollback_registered_many+0xbdb/0xf60 [ 62.239444][ C1] __warn.cold+0x20/0x45 [ 62.239446][ C1] ? rollback_registered_many+0xbdb/0xf60 [ 62.239448][ C1] report_bug+0x1bd/0x210 [ 62.239450][ C1] exc_invalid_op+0x24d/0x400 [ 62.239452][ C1] ? exc_overflow+0x40/0x40 [ 62.239454][ C1] ? mark_lock+0xbc/0x1710 [ 62.239456][ C1] asm_exc_invalid_op+0x12/0x20 [ 62.239458][ C1] RIP: 0010:rollback_registered_many+0xbdb/0xf60 [ 62.239466][ C1] 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 e1 56 3e fb 0f 0b e9 da fd ff ff e8 d5 56 3e fb <0f> 0b e9 18 fe ff ff e8 c9 56 3e fb 0f b6 2d 2e 58 74 04 31 ff 89 [ 62.239469][ C1] RSP: 0018:ffffc90001856f60 EFLAGS: 00010293 [ 62.239473][ C1] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff8634f805 [ 62.239476][ C1] RDX: ffff8880a762e340 RSI: ffffffff8634fa1b RDI: 0000000000000005 [ 62.239480][ C1] RBP: ffff8880967840b8 R08: 0000000000000000 R09: ffffffff8a7b0407 [ 62.239483][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888095dbd800 [ 62.239486][ C1] R13: 0000000000034960 R14: ffff888096784000 R15: 0000000000000000 [ 62.239489][ C1] ? rollback_registered_many+0x9c5/0xf60 [ 62.239491][ C1] ? rollback_registered_many+0xbdb/0xf60 [ 62.239493][ C1] ? dev_xdp_uninstall+0x3f0/0x3f0 [ 62.239495][ C1] ? dev_set_mtu_ext+0x590/0x590 [ 62.239498][ C1] unregister_netdevice_queue+0x2dd/0x570 [ 62.239500][ C1] ? unregister_netdevice_many+0x50/0x50 [ 62.239502][ C1] ? hsr_add_port+0x4f3/0x790 [ 62.239504][ C1] hsr_dev_finalize+0x5ce/0x746 [ 62.239506][ C1] hsr_newlink+0x27c/0x520 [ 62.239508][ C1] ? hsr_dellink+0x70/0x70 [ 62.239510][ C1] ? rtnl_create_link+0x184/0xad0 [ 62.239512][ C1] ? hsr_dellink+0x70/0x70 [ 62.239514][ C1] __rtnl_newlink+0x1090/0x1730 [ 62.239516][ C1] ? rtnl_setlink+0x3c0/0x3c0 [ 62.239518][ C1] ? lock_downgrade+0x820/0x820 [ 62.239520][ C1] ? check_preemption_disabled+0x38/0x220 [ 62.239522][ C1] ? is_bpf_text_address+0xcb/0x160 [ 62.239524][ C1] ? kernel_text_address+0xbd/0xf0 [ 62.239526][ C1] ? __kernel_text_address+0x9/0x30 [ 62.239529][ C1] ? unwind_get_return_address+0x51/0x90 [ 62.239531][ C1] ? profile_setup.cold+0xc1/0xc1 [ 62.239533][ C1] ? arch_stack_walk+0x97/0xf0 [ 62.239535][ C1] ? stack_trace_save+0x8c/0xc0 [ 62.239537][ C1] ? stack_trace_consume_entry+0x160/0x160 [ 62.239539][ C1] ? mark_lock+0xbc/0x1710 [ 62.239541][ C1] ? trace_kmalloc+0xfd/0x130 [ 62.239543][ C1] ? kmem_cache_alloc_trace+0x168/0x2d0 [ 62.239545][ C1] rtnl_newlink+0x64/0xa0 [ 62.239547][ C1] ? __rtnl_newlink+0x1730/0x1730 [ 62.239549][ C1] rtnetlink_rcv_msg+0x44e/0xad0 [ 62.239551][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 62.239553][ C1] ? lock_acquire+0x1f1/0xad0 [ 62.239556][ C1] ? netlink_deliver_tap+0x146/0xb70 [ 62.239558][ C1] netlink_rcv_skb+0x15a/0x430 [ 62.239560][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 62.239562][ C1] ? netlink_ack+0xa10/0xa10 [ 62.239564][ C1] netlink_unicast+0x533/0x7d0 [ 62.239566][ C1] ? netlink_attachskb+0x810/0x810 [ 62.239568][ C1] ? _copy_from_iter_full+0x247/0x890 [ 62.239570][ C1] ? __phys_addr+0x9a/0x110 [ 62.239572][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 62.239574][ C1] ? __check_object_size+0x171/0x3e4 [ 62.239576][ C1] netlink_sendmsg+0x856/0xd90 [ 62.239578][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 62.239580][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 62.239582][ C1] sock_sendmsg+0xcf/0x120 [ 62.239584][ C1] ____sys_sendmsg+0x6e8/0x810 [ 62.239586][ C1] ? kernel_sendmsg+0x50/0x50 [ 62.239588][ C1] ? do_recvmmsg+0x6d0/0x6d0 [ 62.239590][ C1] ? find_held_lock+0x2d/0x110 [ 62.239592][ C1] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 62.239595][ C1] ? __wake_up_common_lock+0xde/0x130 [ 62.239597][ C1] ___sys_sendmsg+0xf3/0x170 [ 62.239599][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 62.239601][ C1] ? lock_downgrade+0x820/0x820 [ 62.239603][ C1] ? __might_fault+0x190/0x1d0 [ 62.239605][ C1] ? _copy_to_user+0x126/0x160 [ 62.239607][ C1] ? move_addr_to_user+0xb5/0x200 [ 62.239609][ C1] ? __fget_light+0x215/0x280 [ 62.239611][ C1] __sys_sendmsg+0xe5/0x1b0 [ 62.239613][ C1] ? __sys_sendmsg_sock+0xb0/0xb0 [ 62.239615][ C1] ? do_syscall_64+0x1c/0xe0 [ 62.239617][ C1] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 62.239619][ C1] do_syscall_64+0x60/0xe0 [ 62.239621][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 62.239623][ C1] RIP: 0033:0x440e29 [ 62.239625][ C1] Code: Bad RIP value. [ 62.239627][ C1] RSP: 002b:00007fffb0002678 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 62.239632][ C1] RAX: ffffffffffffffda RBX: 00000000004a25f0 RCX: 0000000000440e29 [ 62.239636][ C1] RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003 [ 62.239639][ C1] RBP: 00007fffb0002680 R08: 0000000120080522 R09: 0000000120080522 [ 62.239642][ C1] R10: 0000000120080522 R11: 0000000000000246 R12: 00000000004a25f0 [ 62.239645][ C1] R13: 00000000004023c0 R14: 0000000000000000 R15: 0000000000000000 [ 62.241282][ C1] Kernel Offset: disabled