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WARNING: lock held when returning to user space!
6.11.0-rc4-syzkaller-00565-gf9db28bb09f4 #0 Not tainted
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syz.1.2357/10523 is leaving the kernel with locks still held!
1 lock held by syz.1.2357/10523:
 #0: ffffffff8fc84b88 (rtnl_mutex){+.+.}-{3:3}, at: ethnl_act_cable_test+0x187/0x3f0 net/ethtool/cabletest.c:74