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WARNING: lock held when returning to user space!
6.11.0-rc4-syzkaller-00681-ge5899b60f52a-dirty #0 Not tainted
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syz.0.15/6086 is leaving the kernel with locks still held!
1 lock held by syz.0.15/6086:
 #0: ffffffff8fc84c08 (rtnl_mutex){+.+.}-{3:3}, at: ethnl_act_cable_test_tdr+0x3d2/0x10c0 net/ethtool/cabletest.c:341