Date: Fri, 8 Dec 2017 17:16:35 +0000 (UTC) From: Mark Johnston <markj@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r326699 - stable/11/sys/vm Message-ID: <201712081716.vB8HGZNj026331@repo.freebsd.org>
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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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