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WARNING: lock held when returning to user space!
6.10.0-rc1-syzkaller #0 Not tainted
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syz.0.15/2801 is leaving the kernel with locks still held!
1 lock held by syz.0.15/2801:
 #0: ffffffff82775290 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
 #0: ffffffff82775290 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
 #0: ffffffff82775290 (rcu_read_lock){....}-{1:2}, at: ns_ioctl+0x77/0x3b0 fs/nsfs.c:163