================================================
WARNING: lock held when returning to user space!
syzkaller #0 Not tainted
------------------------------------------------
syz.6.5571/22698 is leaving the kernel with locks still held!
1 lock held by syz.6.5571/22698:
 #0: ffff88807b1b0420 (sb_writers#15){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:509
pimreg: entered allmulticast mode