Re: kern/60522: evbppc/RB800 hits MI pmap KASSERT failure

[Rin Okuyama <rokuyama.rk%gmail.com@localhost>]

Hi,

On 2026/08/01 21:42, Nick Hudson wrote:
> Is this a regression? If so can you bisect please

Sure. The first bad commit was:

https://github.com/NetBSD/src/commit/6162b83d2b80429d87007f1f1c451e538e577581

KASSERT failure disappears if part of this commit is reverted:

```
diff --git a/sys/uvm/pmap/pmap.c b/sys/uvm/pmap/pmap.c
index cb0f6b3b065..eba0cbba4c7 100644
--- a/sys/uvm/pmap/pmap.c
+++ b/sys/uvm/pmap/pmap.c
@@ -1326,7 +1326,7 @@ pmap_pte_protect(pmap_t pmap, vaddr_t sva, vaddr_t 
eva, pt_entry_t *ptep,
 			struct vm_page_md * const mdpg = VM_PAGE_TO_MD(pg);

 			pmap_page_set_attributes(mdpg, VM_PAGEMD_MODIFIED);
-			if (VM_PAGEMD_EXECPAGE_P(mdpg) || (prot & VM_PROT_EXECUTE)) {
+			if (VM_PAGEMD_EXECPAGE_P(mdpg)) {
 				KASSERT(!VM_PAGEMD_PVLIST_EMPTY_P(mdpg));
 #ifdef PMAP_VIRTUAL_CACHE_ALIASES
 				if (VM_PAGEMD_CACHED_P(mdpg)) {
```

Thanks,
rin

> Otherwise, please enable UVMHIST and dump pmaphist and pmapexechist after the panic.