[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.0' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 58.993536][ T6786] IPVS: ftp: loaded support on port[0] = 21 [ 59.029201][ T6786] netlink: 24 bytes leftover after parsing attributes in process `syz-executor100'. [ 59.086669][ T6786] device veth1 entered promiscuous mode [ 59.127054][ C0] ------------[ cut here ]------------ [ 59.127060][ C0] WARNING: CPU: 0 PID: 6786 at net/core/dev.c:9000 rollback_registered_many+0xbdb/0xf60 [ 59.127062][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 59.127066][ C0] CPU: 0 PID: 6786 Comm: syz-executor100 Not tainted 5.8.0-rc2-syzkaller #0 [ 59.127070][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.127071][ C0] Call Trace: [ 59.127073][ C0] dump_stack+0x18f/0x20d [ 59.127074][ C0] panic+0x2e3/0x75c [ 59.127076][ C0] ? __warn_printk+0xf3/0xf3 [ 59.127078][ C0] ? printk+0xba/0xed [ 59.127080][ C0] ? log_store.cold+0x16/0x16 [ 59.127081][ C0] ? __warn.cold+0x5/0x45 [ 59.127083][ C0] ? __warn+0xd6/0x1f2 [ 59.127085][ C0] ? rollback_registered_many+0xbdb/0xf60 [ 59.127087][ C0] __warn.cold+0x20/0x45 [ 59.127089][ C0] ? rollback_registered_many+0xbdb/0xf60 [ 59.127091][ C0] report_bug+0x1bd/0x210 [ 59.127093][ C0] exc_invalid_op+0x24d/0x400 [ 59.127095][ C0] ? exc_overflow+0x40/0x40 [ 59.127097][ C0] ? mark_lock+0xbc/0x1710 [ 59.127099][ C0] asm_exc_invalid_op+0x12/0x20 [ 59.127101][ C0] RIP: 0010:rollback_registered_many+0xbdb/0xf60 [ 59.127108][ C0] Code: 00 00 31 f6 4c 89 f7 e8 13 d9 fc ff e9 4f fe ff ff 4c 89 e7 e9 48 fd ff ff e8 01 02 3e fb 0f 0b e9 da fd ff ff e8 f5 01 3e fb <0f> 0b e9 18 fe ff ff e8 e9 01 3e fb 0f b6 2d c4 2a 74 04 31 ff 89 [ 59.127111][ C0] RSP: 0018:ffffc90001616f60 EFLAGS: 00010293 [ 59.127115][ C0] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff86354c45 [ 59.127118][ C0] RDX: ffff88809dac8580 RSI: ffffffff86354e5b RDI: 0000000000000005 [ 59.127121][ C0] RBP: ffff888096b280b8 R08: 0000000000000000 R09: ffffffff8a7b0887 [ 59.127125][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888097681c00 [ 59.127128][ C0] R13: 0000000000034960 R14: ffff888096b28000 R15: 0000000000000000 [ 59.127130][ C0] ? rollback_registered_many+0x9c5/0xf60 [ 59.127132][ C0] ? rollback_registered_many+0xbdb/0xf60 [ 59.127134][ C0] ? dev_xdp_uninstall+0x3f0/0x3f0 [ 59.127136][ C0] ? dev_set_mtu_ext+0x590/0x590 [ 59.127138][ C0] unregister_netdevice_queue+0x2dd/0x570 [ 59.127141][ C0] ? unregister_netdevice_many+0x50/0x50 [ 59.127142][ C0] ? hsr_add_port+0x4f3/0x790 [ 59.127144][ C0] hsr_dev_finalize+0x5ce/0x746 [ 59.127146][ C0] hsr_newlink+0x27c/0x520 [ 59.127148][ C0] ? hsr_dellink+0x70/0x70 [ 59.127150][ C0] ? rtnl_create_link+0x184/0xad0 [ 59.127152][ C0] ? hsr_dellink+0x70/0x70 [ 59.127154][ C0] __rtnl_newlink+0x1090/0x1730 [ 59.127156][ C0] ? rtnl_setlink+0x3c0/0x3c0 [ 59.127158][ C0] ? lock_downgrade+0x820/0x820 [ 59.127160][ C0] ? check_preemption_disabled+0x38/0x220 [ 59.127162][ C0] ? is_bpf_text_address+0xcb/0x160 [ 59.127164][ C0] ? kernel_text_address+0xbd/0xf0 [ 59.127172][ C0] ? __kernel_text_address+0x9/0x30 [ 59.127174][ C0] ? unwind_get_return_address+0x51/0x90 [ 59.127176][ C0] ? profile_setup.cold+0xc1/0xc1 [ 59.127178][ C0] ? arch_stack_walk+0x97/0xf0 [ 59.127180][ C0] ? stack_trace_save+0x8c/0xc0 [ 59.127182][ C0] ? stack_trace_consume_entry+0x160/0x160 [ 59.127184][ C0] ? mark_lock+0xbc/0x1710 [ 59.127186][ C0] ? trace_kmalloc+0xfd/0x130 [ 59.127188][ C0] ? kmem_cache_alloc_trace+0x168/0x2d0 [ 59.127190][ C0] rtnl_newlink+0x64/0xa0 [ 59.127192][ C0] ? __rtnl_newlink+0x1730/0x1730 [ 59.127194][ C0] rtnetlink_rcv_msg+0x44e/0xad0 [ 59.127196][ C0] ? rtnetlink_put_metrics+0x510/0x510 [ 59.127198][ C0] ? lock_acquire+0x1f1/0xad0 [ 59.127200][ C0] ? netlink_deliver_tap+0x146/0xb70 [ 59.127202][ C0] netlink_rcv_skb+0x15a/0x430 [ 59.127204][ C0] ? rtnetlink_put_metrics+0x510/0x510 [ 59.127206][ C0] ? netlink_ack+0xa10/0xa10 [ 59.127208][ C0] netlink_unicast+0x533/0x7d0 [ 59.127210][ C0] ? netlink_attachskb+0x810/0x810 [ 59.127212][ C0] ? _copy_from_iter_full+0x247/0x890 [ 59.127214][ C0] ? __phys_addr+0x9a/0x110 [ 59.127216][ C0] ? __phys_addr_symbol+0x2c/0x70 [ 59.127218][ C0] ? __check_object_size+0x171/0x3e4 [ 59.127220][ C0] netlink_sendmsg+0x856/0xd90 [ 59.127222][ C0] ? netlink_unicast+0x7d0/0x7d0 [ 59.127224][ C0] ? netlink_unicast+0x7d0/0x7d0 [ 59.127226][ C0] sock_sendmsg+0xcf/0x120 [ 59.127227][ C0] ____sys_sendmsg+0x6e8/0x810 [ 59.127229][ C0] ? kernel_sendmsg+0x50/0x50 [ 59.127231][ C0] ? do_recvmmsg+0x6d0/0x6d0 [ 59.127233][ C0] ? find_held_lock+0x2d/0x110 [ 59.127235][ C0] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 59.127238][ C0] ? __wake_up_common_lock+0xde/0x130 [ 59.127239][ C0] ___sys_sendmsg+0xf3/0x170 [ 59.127242][ C0] ? sendmsg_copy_msghdr+0x160/0x160 [ 59.127244][ C0] ? lock_downgrade+0x820/0x820 [ 59.127246][ C0] ? __might_fault+0x190/0x1d0 [ 59.127249][ C0] ? _copy_to_user+0x126/0x160 [ 59.127251][ C0] ? move_addr_to_user+0xb5/0x200 [ 59.127253][ C0] ? __fget_light+0x215/0x280 [ 59.127255][ C0] __sys_sendmsg+0xe5/0x1b0 [ 59.127257][ C0] ? __sys_sendmsg_sock+0xb0/0xb0 [ 59.127259][ C0] ? check_preemption_disabled+0x38/0x220 [ 59.127261][ C0] ? do_syscall_64+0x1c/0xe0 [ 59.127263][ C0] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.127265][ C0] do_syscall_64+0x60/0xe0 [ 59.127267][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 59.127269][ C0] RIP: 0033:0x440e29 [ 59.127271][ C0] Code: Bad RIP value. [ 59.127273][ C0] RSP: 002b:00007ffc118bc688 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 59.127278][ C0] RAX: ffffffffffffffda RBX: 00000000004a25f0 RCX: 0000000000440e29 [ 59.127281][ C0] RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003 [ 59.127284][ C0] RBP: 00007ffc118bc690 R08: 0000000120080522 R09: 0000000120080522 [ 59.127287][ C0] R10: 0000000120080522 R11: 0000000000000246 R12: 00000000004a25f0 [ 59.127290][ C0] R13: 00000000004023c0 R14: 0000000000000000 R15: 0000000000000000 [ 59.128499][ C0] Kernel Offset: disabled