svn commit: r353557 - stable/12/sys/vm

[Mark Johnston]

Author: markj
Date: Tue Oct 15 14:23:16 2019
New Revision: 353557
URL: https://svnweb.freebsd.org/changeset/base/353557

Log:
  MFC r353294:
  Assert that the PGA_{WRITEABLE,EXECUTABLE} flags do not leak.

Modified:
  stable/12/sys/vm/vm_page.c
Directory Properties:
  stable/12/   (props changed)

Modified: stable/12/sys/vm/vm_page.c
==============================================================================
--- stable/12/sys/vm/vm_page.c	Tue Oct 15 14:20:11 2019	(r353556)
+++ stable/12/sys/vm/vm_page.c	Tue Oct 15 14:23:16 2019	(r353557)
@@ -3401,9 +3401,12 @@ vm_page_free_prep(vm_page_t m)
 		vm_page_lock_assert(m, MA_OWNED);
 		KASSERT(!pmap_page_is_mapped(m),
 		    ("vm_page_free_prep: freeing mapped page %p", m));
-	} else
+		KASSERT((m->aflags & (PGA_EXECUTABLE | PGA_WRITEABLE)) == 0,
+		    ("vm_page_free_prep: mapping flags set in page %p", m));
+	} else {
 		KASSERT(m->queue == PQ_NONE,
 		    ("vm_page_free_prep: unmanaged page %p is queued", m));
+	}
 	VM_CNT_INC(v_tfree);
 
 	if (vm_page_sbusied(m))