bugWeeChat - Bugs: bug #40628, Disable guile custom gmp custom...


bug #40628: Disable guile custom gmp custom allocator

Submitted by:  Pierre Carru <pierrecarru>
Submitted on:  Mon 18 Nov 2013 11:39:37 PM UTC  
Category: script API pluginsSeverity: 3 - Normal
Item Group: crashStatus: Fixed
Privacy: PublicAssigned to: Sebastien Helleu <flashcode>
Originator Name: Open/Closed: Closed
Release: 0.4.2IRC nick: 

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Mon 18 Nov 2013 11:39:37 PM UTC, original submission:


Guile musn't install its gmp custom allocator because it interfers with gnutls' use of gmp.
( see http://git.savannah.gnu.org/cgit/guile.git/commit/?id=b57bf2724a254cf73e255b3d2bca0a7dcad6674a )

Crashes can happen when freeing memory with an incorrect free memory function. Example:
1- relay plugin is loaded
2- ssl relay is created, gnutls allocates memory with its default allocator (malloc/free)
3- guile plugin is loaded, guile register its custom gmp allocators (custom_gmp_malloc/custom_gmp_free)
4- "/quit"
5- relay plugin deinits gnutls -> gnutls deinits gmp -> gmp tries frees memory. Some memory allocated with malloc is passed to custom_gmp_free which is not correct => possible segfault

I've attached a simple patch to prevent guile from registering its gmp allocators.

Pierre Carru

Pierre Carru <pierrecarru>


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Carbon-Copy List
  • -unavailable- added by flashcode (Updated the item)
  • -unavailable- added by pierrecarru (Submitted the item)

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    Follow 6 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Sun 09 Feb 2014 09:41:09 AM UTCflashcodeOpen/ClosedOpen=>Closed
    Wed 20 Nov 2013 07:45:15 AM UTCflashcodeCategoryother plugins=>script API plugins
      Assigned toNone=>flashcode
    Mon 18 Nov 2013 11:39:37 PM UTCpierrecarruAttached File-=>Added 0001-Prevent-guile-from-registering-its-gmp-custom-memory.patch, #29654

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