Xi: fix wrong extra length check in ProcXIChangeHierarchy (CVE-2017-12178)
Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Jeremy Huddleston Sequoia <jeremyhu@apple.com> Reviewed-by: Julien Cristau <jcristau@debian.org> Signed-off-by: Nathan Kidd <nkidd@opentext.com> Signed-off-by: Julien Cristau <jcristau@debian.org>
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@ -423,7 +423,7 @@ ProcXIChangeHierarchy(ClientPtr client)
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if (!stuff->num_changes)
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return rc;
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len = ((size_t)stuff->length << 2) - sizeof(xXIAnyHierarchyChangeInfo);
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len = ((size_t)stuff->length << 2) - sizeof(xXIChangeHierarchyReq);
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any = (xXIAnyHierarchyChangeInfo *) &stuff[1];
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while (stuff->num_changes--) {
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