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Bug #3700

closed

Buffer overrun in util.c: ruby_hdtoa / nrv_alloc

Added by pweldon (Peter Weldon) over 14 years ago. Updated over 13 years ago.

Status:
Closed
Assignee:
-
Target version:
2.0.0
ruby -v:
ruby 1.9.3dev (2010-08-15) [i386-mswin32_100]
Backport:
[ruby-core:31725]

Description

=begin
util.c (ruby_hdtoa) causes buffer overrun in nrv_alloc when returning copies of constant strings ("0", "NaN", "Infinity"). Detected while running ruby 1.9.3dev (2010-08-15) [i386-mswin32_100], linked with debug crt libs, heap corruption is detected while running test/ruby/test_sprintf.rb.

Patch attached:

  • consistently handling of const return strings in ruby_hdtoa, ruby_dtoa, using rv_strdup
  • avoid strlen in rv_strdup
  • remove handrolled memcpy in nrv_alloc
    =end

Files

Download all files
i386-mswin32_100.txt (5.73 KB) i386-mswin32_100.txt Heap corruption call stack pweldon (Peter Weldon), 08/16/2010 01:38 PM
util.c.patch (2.16 KB) util.c.patch util.c patch pweldon (Peter Weldon), 08/16/2010 01:38 PM
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