RESOLVED FIXED 39360
JSObjectSetPrototype doesn't check for cycle in prototype chain. 
https://bugs.webkit.org/show_bug.cgi?id=39360
Summary JSObjectSetPrototype doesn't check for cycle in prototype chain.
Jędrzej Nowacki
Reported 2010-05-19 07:53:33 PDT
JSObjectSetPrototype permits to set any object as prototype of any object. Lack of check if an object being added to a property chain is actually in it, could produce crashes and hangs. A small snippet: JSObjectRef object = JSObjectMake(context, /* jsClass */ 0, /* data */ 0); JSObjectSetPrototype(context, object, object); JSObjectGetProperty(context, object, invalid_property_name, /* exception*/ 0); The code should hang. I suppose to see same behavior: > a = new Object [object Object] > a.__proto__=a Exception: Error: cyclic __proto__ value > The patch is on the way...
Attachments
Fix v1 (7.02 KB, patch)
2010-05-28 07:29 PDT, Jędrzej Nowacki 		no flags
DetailsFormatted DiffDiff
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Jędrzej Nowacki
Comment 1 2010-05-28 07:29:00 PDT
Created attachment 57329 [details] Fix v1
Geoffrey Garen
Comment 2 2010-05-28 10:06:02 PDT
Comment on attachment 57329 [details] Fix v1 r=me Nice.
WebKit Commit Bot
Comment 3 2010-05-28 23:16:35 PDT
Comment on attachment 57329 [details] Fix v1 Clearing flags on attachment: 57329 Committed r60390: <http://trac.webkit.org/changeset/60390>
WebKit Commit Bot
Comment 4 2010-05-28 23:16:41 PDT
All reviewed patches have been landed. Closing bug.
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