================================================
WARNING: lock held when returning to user space!
syzkaller #0 Not tainted
------------------------------------------------
syz.0.45/6102 is leaving the kernel with locks still held!
1 lock held by syz.0.45/6102:
 #0: ffff888079aaa420 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:509