[tor-bugs] #18090 [Tor Browser]: Torcrazybutton eats all memory and crashes Tor Browser (was: Tor Browser eats all memory and crashes when playing video (probably, NoScript))

[Tor Bug Tracker & Wiki]

#18090: Torcrazybutton eats all memory and crashes Tor Browser
-------------------------------------------------+-------------------------
 Reporter:  bugzilla                             |          Owner:  tbb-
     Type:  defect                               |  team
 Priority:  Medium                               |         Status:  new
Component:  Tor Browser                          |      Milestone:
 Severity:  Major                                |        Version:
 Keywords:  tbb-crash, tbb-performance-leaking,  |     Resolution:
  tbb-oom, tbb-torbutton                         |  Actual Points:
Parent ID:  #18047                               |         Points:
 Reviewer:                                       |        Sponsor:
-------------------------------------------------+-------------------------
Changes (by bugzilla):

 * keywords:  tbb-crash, tbb-performance-leaking, tbb-oom => tbb-crash, tbb-
     performance-leaking, tbb-oom, tbb-torbutton


Comment:

 The reason is:
 Torbutton goes crazy and starts an endless loop of growing (more) and
 shrinking (less) by populating strings, thus creeping to OOM.
 Incompatibility with site scripts?
 {{{
 742.03 MB (100.0%) -- explicit
 ├──618.03 MB (83.29%) -- window-objects
 │  ├──546.97 MB (73.71%) -- top(chrome://browser/content/browser.xul,
 id=86)
 │  │  ├──544.10 MB (73.33%) -- js-zone(0x14d2cba0)
 │  │  │  ├──543.59 MB (73.26%) -- strings
 │  │  │  │  ├──540.04 MB (72.78%) -- string(length=1048628, copies=540,
 "WCF_reportPageError at chrome://torbutton/content/torbutton.js:3066:13/nWCF_reportPageError at chrome://torbutton/content/torbutton.js:3066:20/nWCF_reportPageError at chrome://torbutton/content/torbutton.js:3066:20/nWCF_reportPageError at chrome://torbutton/content/torbutton.js:3066:20/nWCF_reportPageError at chrome://torbutton/content/torbutton.js:3066:20/nWCF_reportPageError at chrome://torbutton/content/torbutton.js:3066:20/nWCF_reportPageError at chrome://torbutton/content/torbutton.js:3066:20/nWCF_reportPageError at chrome://torbutton/content/torbutton.js:3066:20/nWCF_reportPageError at chrome://torbutton/content/torbutton.js:3066:20/nWCF_reportPageError at chrome://torbutton/content/torbutton.js:3066:20/nWCF_reportPageError at chrome://torbutton/content/torbutton.js:3066:20/nWCF_reportPageError at chrome://torbutton/content/torbutton.js:3066:20/nWCF_reportPageError at chrome://torbutton/content/torbutton.js:3066:20/nWCF_reportPageError at chrome://torbutton/content/torbutton.js:3066:20/nWCF_reportPageError at chrome://t
 orbutton/content/torbutton."
 (truncated))
 │  │  │  │  │  ├──540.03 MB (72.78%) ── malloc-heap/latin1
 }}}

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18090#comment:11>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online