------------[ cut here ]------------
WARNING: CPU: 1 PID: 11629 at net/core/dev.c:9000 rollback_registered_many+0xbdb/0xf60 net/core/dev.c:9000
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 11629 Comm: syz-executor.2 Not tainted 5.8.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:231
 __warn.cold+0x20/0x45 kernel/panic.c:600
 report_bug+0x1bd/0x210 lib/bug.c:198
 exc_invalid_op+0x24d/0x400 arch/x86/kernel/traps.c:235
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:563
RIP: 0010:rollback_registered_many+0xbdb/0xf60 net/core/dev.c:9000
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 c1 f0 3d fb 0f 0b e9 da fd ff ff e8 b5 f0 3d fb <0f> 0b e9 18 fe ff ff e8 a9 f0 3d fb 0f b6 2d c6 32 74 04 31 ff 89
RSP: 0018:ffffc90001c16f60 EFLAGS: 00010212
RAX: 0000000000036052 RBX: dffffc0000000000 RCX: ffffc9000d873000
RDX: 0000000000040000 RSI: ffffffff86355f9b RDI: 0000000000000005
RBP: ffff88804687c0b8 R08: 0000000000000000 R09: ffffffff8a7b16c7
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888094c36880
R13: 0000000000034960 R14: ffff88804687c000 R15: 0000000000000000
 rollback_registered net/core/dev.c:9021 [inline]
 unregister_netdevice_queue+0x2dd/0x570 net/core/dev.c:10102
 unregister_netdevice include/linux/netdevice.h:2754 [inline]
 hsr_dev_finalize+0x5ce/0x746 net/hsr/hsr_device.c:483
 hsr_newlink+0x27c/0x520 net/hsr/hsr_netlink.c:83
 __rtnl_newlink+0x1090/0x1730 net/core/rtnetlink.c:3339
 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3397
 rtnetlink_rcv_msg+0x44e/0xad0 net/core/rtnetlink.c:5460
 netlink_rcv_skb+0x15a/0x430 net/netlink/af_netlink.c:2469
 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline]
 netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1329
 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1918
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:672
 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2363
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2417
 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2450
 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45cba9
Code: Bad RIP value.
RSP: 002b:00007f71e0ed5c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000503120 RCX: 000000000045cba9
RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000a5b R14: 00000000004cd48b R15: 00007f71e0ed66d4
Kernel Offset: disabled