Re: kern/59955: kernel diagnostic assertion "rw_lock_held(&map->lock)" failed: file "/home/riastradh/netbsd/11/src/sys/uvm/uvm_map.c", line 1704

[Chuck Silvers <chuq%chuq.com@localhost>]

On Sun, Feb 01, 2026 at 08:37:45PM +0000, Taylor R Campbell wrote:
> Actually, just taking the read lock in mm_md_kernacc probably isn't
> enough, because we really need the access to _remain_ allowed while we
> do the uiomove in dev/mm.c.  Can we hold the map lock across uiomove?
> Sounds unlikely.  Can we wire the pages with uvm_vslock or something
> across the uvm_map_checkprot and uiomove?

there is no need to call uvm_map_checkprot() here.  if uiomove() faults
while trying to access an unmapped address within module_map, it will just
fail with an error, which is what you'd want anyway.

-Chuck