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Bug #12441

Segfault in mod_exp

Added by technion (Joshua Small) over 4 years ago. Updated about 4 years ago.

Status:
Closed
Priority:
Normal
Assignee:
-
Target version:
-
ruby -v:
2.3.1p112 (2016-04-26 revision 54768) [x86_64-linux]
[ruby-core:75785]

Description

I have the piece of code crashing reliably.

#!/usr/bin/env ruby

require 'openssl'

p = 65997564567567456745676645367739412743227643334286989217363396439283464537000853588029739004855929104754800897261407081024749574299035313695899693187167


def mything(h)
  b = 43554325436535756
  k = h.to_bn.mod_exp(b, p)
end



h = 3007963317613531062721539798844764834140098543127007866692410407137612395983233591022449771190189492227443776860661459473931676217894527075146085609662899

puts mything h

I have written very similar pieces of code before without an issue but this but particular one seems to have hit something. I have attached a crash report.


Files

crash.log (13.4 KB) crash.log Crash log technion (Joshua Small), 05/31/2016 09:34 AM

Updated by rhenium (Kazuki Yamaguchi) over 4 years ago

  • Status changed from Open to Closed

The minimal reproducer:

123.to_bn.mod_exp(456, nil)

This is already (unintentionally) fixed in r55047.

Updated by usa (Usaku NAKAMURA) over 4 years ago

  • Backport changed from 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN to 2.1: WONTFIX, 2.2: REQUIRED, 2.3: REQUIRED

Updated by nagachika (Tomoyuki Chikanaga) about 4 years ago

  • Backport changed from 2.1: WONTFIX, 2.2: REQUIRED, 2.3: REQUIRED to 2.1: WONTFIX, 2.2: REQUIRED, 2.3: DONE

ruby_2_3 r55906 merged revision(s) 55047.

Updated by usa (Usaku NAKAMURA) about 4 years ago

  • Backport changed from 2.1: WONTFIX, 2.2: REQUIRED, 2.3: DONE to 2.1: WONTFIX, 2.2: DONE, 2.3: DONE

ruby_2_2 r55937 merged revision(s) 55047.

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