panic: lock (smbsm) lockmgr does not match earlier (sleep mutex) lock

Hi,

I receive the following panic "lock (smbsm) lockmgr does not match earlier (sleep mutex) lock" when loading the smbfs module on a recent current.

Kernel dumps weren't configured on the particular machine. Here's the abbreviated relevant portions of the stack:
...
nsmb_dev_load
smb_sm_init
smb_co_init
...
enroll
panic

In smb_co_init(), the same description/name is used to initialize both cp->co_interlock and cp->co_lock.