[Bug 1324564] Re: transmission-gtk crashed with SIGSEGV in gnutls_x509_crt_import()

[Paul Gauret]

*** This bug is a duplicate of bug 1304004 ***
    https://bugs.launchpad.net/bugs/1304004

I guess #1304004 is marked private as it relates to a security package.

Good news is that I found a workaround by downgrading to libcurl3-gnutls_7.35.0-1ubuntu1. So far Transmission is stable with it even under high load.
Bad news is that this particular version has a couple of nasty security bugs and that you have to be extremely careful if downgrading, as this library is shared with many other applications and that you may be exposed.

I will mark this bug as affecting libcurl3-gnutls and see what its
maintainer thinks. My guess is that the security fixes recently applied
somehow break Transmission.


** Also affects: curl (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1324564

Title:
  transmission-gtk crashed with SIGSEGV in gnutls_x509_crt_import()

Status in “curl” package in Ubuntu:
  New
Status in “transmission” package in Ubuntu:
  Confirmed

Bug description:
  I just made a download of this torrent:
  http://www.stresslinux.org/sl/downloads/52.torrent
  Then double click on the download-file "stresslinux_32bit_11.4.i686-0.7.106.iso.bz2.torrent" => transmission started (shortly) and crashed.

  ProblemType: Crash
  DistroRelease: Ubuntu 14.04
  Package: transmission-gtk 2.82-1.1ubuntu3
  ProcVersionSignature: Ubuntu 3.13.0-27.50-generic 3.13.11
  Uname: Linux 3.13.0-27-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  CrashCounter: 1
  CurrentDesktop: Unity
  Date: Thu May 29 16:22:51 2014
  ExecutablePath: /usr/bin/transmission-gtk
  InstallationDate: Installed on 2013-12-29 (150 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  ProcCmdline: transmission-gtk /home/username/Downloads/stresslinux/stresslinux_32bit_11.4.i686-0.7.106.iso.bz2.torrent
  SegvAnalysis:
   Segfault happened at: 0x7fadad070b19 <gnutls_x509_crt_import+25>:	mov    (%rsi),%rsi
   PC (0x7fadad070b19) ok
   source "(%rsi)" (0x00000000) not located in a known VMA region (needed readable region)!
   destination "%rsi" ok
   Stack memory exhausted (SP below stack segment)
  SegvReason: reading NULL VMA
  Signal: 11
  SourcePackage: transmission
  StacktraceTop:
   gnutls_x509_crt_import () from /usr/lib/x86_64-linux-gnu/libgnutls.so.26
   ?? () from /usr/lib/x86_64-linux-gnu/libcurl-gnutls.so.4
   ?? () from /usr/lib/x86_64-linux-gnu/libcurl-gnutls.so.4
   ?? () from /usr/lib/x86_64-linux-gnu/libcurl-gnutls.so.4
   ?? () from /usr/lib/x86_64-linux-gnu/libcurl-gnutls.so.4
  Title: transmission-gtk crashed with SIGSEGV in gnutls_x509_crt_import()
  UpgradeStatus: Upgraded to trusty on 2014-03-30 (59 days ago)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

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