================================================
WARNING: lock held when returning to user space!
6.11.0-rc5-next-20240827-syzkaller #0 Not tainted
------------------------------------------------
syz.2.76/5548 is leaving the kernel with locks still held!
1 lock held by syz.2.76/5548:
 #0: ffffffff8fcc6f88 (rtnl_mutex){+.+.}-{3:3}, at: ethnl_act_cable_test+0x187/0x3f0 net/ethtool/cabletest.c:74