[ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ 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 '10.128.1.62' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 54.945622][ T6819] IPVS: ftp: loaded support on port[0] = 21 [ 54.979085][ T6819] netlink: 24 bytes leftover after parsing attributes in process `syz-executor944'. [ 55.033972][ T6819] device veth1 entered promiscuous mode [ 55.073414][ T6819] ------------[ cut here ]------------ [ 55.078922][ T6819] WARNING: CPU: 1 PID: 6819 at net/core/dev.c:9001 rollback_registered_many+0xbdb/0xf60 [ 55.089535][ T6819] Kernel panic - not syncing: panic_on_warn set ... [ 55.096150][ T6819] CPU: 1 PID: 6819 Comm: syz-executor944 Not tainted 5.8.0-rc3-next-20200703-syzkaller #0 [ 55.106032][ T6819] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.116064][ T6819] Call Trace: [ 55.119348][ T6819] dump_stack+0x18f/0x20d [ 55.123660][ T6819] panic+0x2e3/0x75c [ 55.127635][ T6819] ? __warn_printk+0xf3/0xf3 [ 55.132211][ T6819] ? printk+0xba/0xed [ 55.136182][ T6819] ? log_store.cold+0x16/0x16 [ 55.140852][ T6819] ? do_syscall_64+0x60/0xe0 [ 55.145430][ T6819] ? __warn.cold+0x5/0x45 [ 55.149732][ T6819] ? __warn+0xd6/0x1f2 [ 55.153780][ T6819] ? rollback_registered_many+0xbdb/0xf60 [ 55.159498][ T6819] __warn.cold+0x20/0x45 [ 55.163732][ T6819] ? rollback_registered_many+0xbdb/0xf60 [ 55.169442][ T6819] report_bug+0x1bd/0x210 [ 55.173764][ T6819] handle_bug+0x38/0x90 [ 55.177907][ T6819] exc_invalid_op+0x13/0x40 [ 55.182407][ T6819] asm_exc_invalid_op+0x12/0x20 [ 55.187245][ T6819] RIP: 0010:rollback_registered_many+0xbdb/0xf60 [ 55.193546][ T6819] 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 d1 ff 3a fb 0f 0b e9 da fd ff ff e8 c5 ff 3a fb <0f> 0b e9 18 fe ff ff e8 b9 ff 3a fb 0f b6 2d 13 1e 71 04 31 ff 89 [ 55.213124][ T6819] RSP: 0018:ffffc90001856f60 EFLAGS: 00010293 [ 55.219170][ T6819] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff86390525 [ 55.227153][ T6819] RDX: ffff8880a7b98080 RSI: ffffffff8639073b RDI: 0000000000000005 [ 55.235103][ T6819] RBP: ffff88808ef0c0b8 R08: 0000000000000000 R09: ffffffff8a7ba387 [ 55.243064][ T6819] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a8d99080 [ 55.251027][ T6819] R13: 0000000000034960 R14: ffff88808ef0c000 R15: 0000000000000000 [ 55.258990][ T6819] ? rollback_registered_many+0x9c5/0xf60 [ 55.264687][ T6819] ? rollback_registered_many+0xbdb/0xf60 [ 55.270393][ T6819] ? dev_xdp_uninstall+0x3f0/0x3f0 [ 55.275487][ T6819] ? dev_set_mtu_ext+0x590/0x590 [ 55.280414][ T6819] unregister_netdevice_queue+0x2dd/0x570 [ 55.286117][ T6819] ? unregister_netdevice_many+0x50/0x50 [ 55.291747][ T6819] ? hsr_add_port+0x4f3/0x790 [ 55.296413][ T6819] hsr_dev_finalize+0x5ce/0x746 [ 55.301280][ T6819] hsr_newlink+0x27c/0x520 [ 55.305707][ T6819] ? hsr_dellink+0x70/0x70 [ 55.310104][ T6819] ? rtnl_create_link+0x184/0xad0 [ 55.315105][ T6819] ? hsr_dellink+0x70/0x70 [ 55.319498][ T6819] __rtnl_newlink+0x1090/0x1730 [ 55.324345][ T6819] ? rtnl_setlink+0x3c0/0x3c0 [ 55.329000][ T6819] ? unwind_next_frame+0xe3b/0x1f90 [ 55.334231][ T6819] ? is_bpf_text_address+0xcb/0x160 [ 55.339410][ T6819] ? kernel_text_address+0xbd/0xf0 [ 55.344503][ T6819] ? __kernel_text_address+0x9/0x30 [ 55.349695][ T6819] ? unwind_get_return_address+0x51/0x90 [ 55.355317][ T6819] ? profile_setup.cold+0xc1/0xc1 [ 55.360324][ T6819] ? arch_stack_walk+0x97/0xf0 [ 55.365071][ T6819] ? stack_trace_save+0x8c/0xc0 [ 55.369897][ T6819] ? stack_trace_consume_entry+0x160/0x160 [ 55.375691][ T6819] ? mark_lock+0xbc/0x1710 [ 55.380125][ T6819] ? lock_is_held_type+0xb0/0xe0 [ 55.385048][ T6819] ? kmem_cache_alloc_trace+0x181/0x480 [ 55.390585][ T6819] rtnl_newlink+0x64/0xa0 [ 55.394890][ T6819] ? __rtnl_newlink+0x1730/0x1730 [ 55.399904][ T6819] rtnetlink_rcv_msg+0x44e/0xad0 [ 55.404827][ T6819] ? rtnetlink_put_metrics+0x510/0x510 [ 55.410308][ T6819] ? lock_acquire+0x1f1/0xad0 [ 55.414990][ T6819] ? netlink_deliver_tap+0x146/0xb70 [ 55.420258][ T6819] netlink_rcv_skb+0x15a/0x430 [ 55.425027][ T6819] ? rtnetlink_put_metrics+0x510/0x510 [ 55.430480][ T6819] ? netlink_ack+0xa10/0xa10 [ 55.435050][ T6819] ? lock_is_held_type+0xb0/0xe0 [ 55.439965][ T6819] netlink_unicast+0x533/0x7d0 [ 55.444729][ T6819] ? netlink_attachskb+0x810/0x810 [ 55.449856][ T6819] ? _copy_from_iter_full+0x247/0x890 [ 55.455232][ T6819] ? __phys_addr+0x9a/0x110 [ 55.459753][ T6819] ? __phys_addr_symbol+0x2c/0x70 [ 55.464755][ T6819] ? __check_object_size+0x171/0x3e4 [ 55.470030][ T6819] netlink_sendmsg+0x856/0xd90 [ 55.474793][ T6819] ? netlink_unicast+0x7d0/0x7d0 [ 55.479725][ T6819] ? netlink_unicast+0x7d0/0x7d0 [ 55.484654][ T6819] sock_sendmsg+0xcf/0x120 [ 55.489057][ T6819] ____sys_sendmsg+0x6e8/0x810 [ 55.493807][ T6819] ? kernel_sendmsg+0x50/0x50 [ 55.498457][ T6819] ? do_recvmmsg+0x6d0/0x6d0 [ 55.503025][ T6819] ? __wake_up_common_lock+0xb4/0x130 [ 55.508386][ T6819] ? find_held_lock+0x2d/0x110 [ 55.513145][ T6819] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 55.519138][ T6819] ? __wake_up_common_lock+0xde/0x130 [ 55.524502][ T6819] ___sys_sendmsg+0xf3/0x170 [ 55.529082][ T6819] ? sendmsg_copy_msghdr+0x160/0x160 [ 55.534346][ T6819] ? lock_downgrade+0x820/0x820 [ 55.539178][ T6819] ? lock_downgrade+0x820/0x820 [ 55.544021][ T6819] ? __might_fault+0x190/0x1d0 [ 55.548774][ T6819] ? _copy_to_user+0x126/0x160 [ 55.553516][ T6819] ? move_addr_to_user+0xb5/0x200 [ 55.558535][ T6819] ? __fget_light+0x215/0x280 [ 55.563206][ T6819] __sys_sendmsg+0xe5/0x1b0 [ 55.567699][ T6819] ? __sys_sendmsg_sock+0xb0/0xb0 [ 55.572703][ T6819] ? do_syscall_64+0x1c/0xe0 [ 55.577268][ T6819] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 55.583242][ T6819] do_syscall_64+0x60/0xe0 [ 55.588604][ T6819] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 55.594470][ T6819] RIP: 0033:0x440e29 [ 55.598337][ T6819] Code: Bad RIP value. [ 55.602392][ T6819] RSP: 002b:00007ffd95375f08 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 55.610787][ T6819] RAX: ffffffffffffffda RBX: 00000000004a25f0 RCX: 0000000000440e29 [ 55.618750][ T6819] RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003 [ 55.626778][ T6819] RBP: 00007ffd95375f10 R08: 0000000120080522 R09: 0000000120080522 [ 55.634732][ T6819] R10: 0000000120080522 R11: 0000000000000246 R12: 00000000004a25f0 [ 55.642690][ T6819] R13: 00000000004023c0 R14: 0000000000000000 R15: 0000000000000000 [ 55.651900][ T6819] Kernel Offset: disabled [ 55.656263][ T6819] Rebooting in 86400 seconds..