Author: markj
Date: Fri Dec 8 17:16:35 2017
New Revision: 326699
URL: https://svnweb.freebsd.org/changeset/base/326699
Log:
MFC r326371:
Verify the object/vnode association after vget() in vm_pageout_clean().
Modified:
stable/11/sys/vm/vm_pageout.c
Directory Properties:
stable/11/ (props changed)
Modified: stable/11/sys/vm/vm_pageout.c
==============================================================================
--- stable/11/sys/vm/vm_pageout.c Fri Dec 8 17:15:20 2017
(r326698)
+++ stable/11/sys/vm/vm_pageout.c Fri Dec 8 17:16:35 2017
(r326699)
@@ -617,7 +617,17 @@ vm_pageout_clean(vm_page_t m, int *numpagedout)
goto unlock_mp;
}
VM_OBJECT_WLOCK(object);
+
+ /*
+ * Ensure that the object and vnode were not disassociated
+ * while locks were dropped.
+ */
+ if (vp->v_object != object) {
+ error = ENOENT;
+ goto unlock_all;
+ }
vm_page_lock(m);
+
/*
* While the object and page were unlocked, the page
* may have been:
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