================================================
WARNING: lock held when returning to user space!
syzkaller #0 Not tainted
------------------------------------------------
syz.1.2956/16669 is leaving the kernel with locks still held!
1 lock held by syz.1.2956/16669:
 #0: ffff888022a96420 (sb_writers#13){.+.+}-{0:0}
, at: mnt_want_write+0x41/0x90 fs/namespace.c:509