Bug #3700

Buffer overrun in util.c: ruby_hdtoa / nrv_alloc

Added by Peter Weldon over 5 years ago. Updated over 4 years ago.

ruby -v:ruby 1.9.3dev (2010-08-15) [i386-mswin32_100] Backport:


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

i386-mswin32_100.txt Magnifier - Heap corruption call stack (5.73 KB) Peter Weldon, 08/16/2010 01:38 PM

util.c.patch Magnifier - util.c patch (2.16 KB) Peter Weldon, 08/16/2010 01:38 PM


#1 Updated by Nobuyoshi Nakada over 5 years ago

  • Status changed from Open to Closed
  • % Done changed from 0 to 100

This issue was solved with changeset r29010.
Peter, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.


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