[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Reached target Login Prompts. [ OK ] Started OpenBSD Secure Shell server. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.205' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.327442][ T6796] IPVS: ftp: loaded support on port[0] = 21 [ 42.361448][ T6796] netlink: 24 bytes leftover after parsing attributes in process `syz-executor657'. [ 42.427141][ T6796] device veth1 entered promiscuous mode [ 42.467040][ C0] ------------[ cut here ]------------ [ 42.467044][ C0] WARNING: CPU: 0 PID: 6796 at net/core/dev.c:8992 rollback_registered_many+0x1146/0x14a0 [ 42.467046][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 42.467048][ C0] CPU: 0 PID: 6796 Comm: syz-executor657 Not tainted 5.8.0-rc2-syzkaller #0 [ 42.467050][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.467051][ C0] Call Trace: [ 42.467052][ C0] dump_stack+0x1f0/0x31e [ 42.467053][ C0] panic+0x264/0x7a0 [ 42.467055][ C0] ? __warn+0x102/0x250 [ 42.467056][ C0] ? rollback_registered_many+0x1146/0x14a0 [ 42.467057][ C0] __warn+0x227/0x250 [ 42.467059][ C0] ? rollback_registered_many+0x1146/0x14a0 [ 42.467060][ C0] report_bug+0x1b1/0x2e0 [ 42.467061][ C0] exc_invalid_op+0x1fb/0x370 [ 42.467062][ C0] asm_exc_invalid_op+0x12/0x20 [ 42.467064][ C0] RIP: 0010:rollback_registered_many+0x1146/0x14a0 [ 42.467068][ C0] Code: 4c 8d bc 24 90 00 00 00 e9 97 f6 ff ff e8 d2 b6 07 fb 0f 0b e9 e9 f6 ff ff e8 c6 b6 07 fb 0f 0b e9 1c ff ff ff e8 ba b6 07 fb <0f> 0b e9 70 ff ff ff e8 ae b6 07 fb 0f 0b e9 fc f7 ff ff e8 a2 b6 [ 42.467070][ C0] RSP: 0018:ffffc900016571d8 EFLAGS: 00010293 [ 42.467073][ C0] RAX: ffffffff866c9d46 RBX: ffff8880961460b8 RCX: ffff88809458c440 [ 42.467075][ C0] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 42.467076][ C0] RBP: ffff888096146010 R08: ffffffff866c9c6d R09: fffffbfff12b73a1 [ 42.467078][ C0] R10: fffffbfff12b73a1 R11: 0000000000000000 R12: dead000000000122 [ 42.467080][ C0] R13: dffffc0000000000 R14: ffff888096146068 R15: ffffc900016572d0 [ 42.467082][ C0] ? rollback_registered_many+0x106d/0x14a0 [ 42.467083][ C0] ? rollback_registered_many+0x1146/0x14a0 [ 42.467084][ C0] ? rollback_registered_many+0x1146/0x14a0 [ 42.467086][ C0] unregister_netdevice_queue+0x2f3/0x4b0 [ 42.467087][ C0] hsr_dev_finalize+0x4d4/0x6d0 [ 42.467088][ C0] hsr_newlink+0x410/0x4c0 [ 42.467090][ C0] rtnl_newlink+0x143e/0x1bf0 [ 42.467091][ C0] ? __lock_acquire+0x116c/0x2c30 [ 42.467092][ C0] ? __mutex_lock_common+0x582/0x2fc0 [ 42.467094][ C0] ? rtnl_setlink+0x490/0x490 [ 42.467095][ C0] rtnetlink_rcv_msg+0x889/0xd40 [ 42.467096][ C0] ? lock_acquire+0x160/0x720 [ 42.467097][ C0] ? rcu_lock_acquire+0x5/0x30 [ 42.467099][ C0] ? check_preemption_disabled+0x40/0x240 [ 42.467100][ C0] ? debug_smp_processor_id+0x5/0x20 [ 42.467101][ C0] netlink_rcv_skb+0x190/0x3a0 [ 42.467103][ C0] ? rtnetlink_bind+0x80/0x80 [ 42.467104][ C0] netlink_unicast+0x786/0x940 [ 42.467105][ C0] netlink_sendmsg+0xa57/0xd70 [ 42.467106][ C0] ? netlink_getsockopt+0x9e0/0x9e0 [ 42.467108][ C0] ____sys_sendmsg+0x519/0x800 [ 42.467109][ C0] ? import_iovec+0x12a/0x2c0 [ 42.467110][ C0] __sys_sendmsg+0x2b1/0x360 [ 42.467111][ C0] ? _copy_to_user+0x100/0x140 [ 42.467113][ C0] ? move_addr_to_user+0x17e/0x1e0 [ 42.467114][ C0] ? __sys_getsockname+0x1e2/0x220 [ 42.467115][ C0] ? check_preemption_disabled+0xb0/0x240 [ 42.467117][ C0] ? check_preemption_disabled+0x40/0x240 [ 42.467118][ C0] ? check_preemption_disabled+0x40/0x240 [ 42.467119][ C0] ? do_syscall_64+0x1d/0xe0 [ 42.467121][ C0] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 42.467122][ C0] do_syscall_64+0x73/0xe0 [ 42.467124][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 42.467125][ C0] RIP: 0033:0x440e29 [ 42.467126][ C0] Code: Bad RIP value. [ 42.467127][ C0] RSP: 002b:00007ffeaa1c6518 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 42.467130][ C0] RAX: ffffffffffffffda RBX: 00000000004a25f0 RCX: 0000000000440e29 [ 42.467132][ C0] RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003 [ 42.467134][ C0] RBP: 00007ffeaa1c6520 R08: 0000000120080522 R09: 0000000120080522 [ 42.467136][ C0] R10: 0000000120080522 R11: 0000000000000246 R12: 00000000004a25f0 [ 42.467138][ C0] R13: 00000000004023c0 R14: 0000000000000000 R15: 0000000000000000 [ 42.468624][ C0] Kernel Offset: disabled