------------[ cut here ]------------ WARNING: CPU: 1 PID: 9520 at net/core/dev.c:8992 rollback_registered_many+0xbdb/0xf60 net/core/dev.c:8992 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 9520 Comm: syz-executor.2 Not tainted 5.8.0-rc1-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:8992 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 11 95 3e fb 0f 0b e9 da fd ff ff e8 05 95 3e fb <0f> 0b e9 18 fe ff ff e8 f9 94 3e fb 0f b6 2d 96 8e 74 04 31 ff 89 RSP: 0018:ffffc90016f2ef60 EFLAGS: 00010212 RAX: 000000000002922d RBX: dffffc0000000000 RCX: ffffc9000dbd3000 RDX: 0000000000040000 RSI: ffffffff8634bb6b RDI: 0000000000000005 RBP: ffff8880a2b4a0b8 R08: 0000000000000000 R09: ffffffff8a7afd47 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809d819680 R13: 0000000000034960 R14: ffff8880a2b4a000 R15: 0000000000000000 rollback_registered net/core/dev.c:9013 [inline] unregister_netdevice_queue+0x2dd/0x570 net/core/dev.c:10094 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:2352 ___sys_sendmsg+0xf3/0x170 net/socket.c:2406 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2439 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45ca59 Code: Bad RIP value. RSP: 002b:00007f03f6764c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000502000 RCX: 000000000045ca59 RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000005 RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000a32 R14: 00000000004cd164 R15: 00007f03f67656d4 Kernel Offset: disabled