[Bug 2061954] Re: filezilla crashed with SIGABRT in start_thread()

[Phil Wyett]

[ Impact ]

File reading is not correctly performed and leaves the dependent package
filezilla in a state where uplaoding of files causes error and crashes the
application.

[ Test Plan ]

* Create vanilla[1] Virtual Machines (VMs) - Ubuntu 24.04.

* Test the bug exists in the VMs.
  - Setup connections to my kathenas server.
  - Uplod and dowload a variety of file types.
    # *.txt
    # *.mp4
    # *.mp3
    # *.ogg
    and others.

  * Create vanilla[1] Virtual Machines (VMs) - Ubuntu 24.04.

  * Test the bug is fixed with submitted patch built into package and installed
    in the VMs.
  - Setup connections to my kathenas server.
  - Uplod and dowload a variety of file types.
    # *.txt
    # *.mp4
    # *.mp3
    # *.ogg
    and others.

  * Tests performed over days and conencting randomly to perform upload and
    download tests.

  * Check for bug feedback when built and enters proposed updates
repository.

[ Where problems could occur ]

The patch allows for correct operation by changing the IO behaviour and alters
no other operation of the application. The patch has negligible risk for the users
of this library and the dependent package filezilla.

Only filezilla consumes this library and there is no risk to any other
library/application.

[ Other Info ]

None.

[1] These are installations that have only Ubuntu repositories and no
applications installed other than the default install ones and the
package being test.

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https://bugs.launchpad.net/bugs/2061954

Title:
  filezilla crashed with SIGABRT in start_thread()

Status in libfilezilla package in Ubuntu:
  In Progress

Bug description:
  filezilla crashes (core dump) while transferring file(s) when
  connected via SFTP.

  ProblemType: Crash
  DistroRelease: Ubuntu 24.04
  Package: filezilla 3.66.5-2build2
  ProcVersionSignature: Ubuntu 6.8.0-22.22-generic 6.8.1
  Uname: Linux 6.8.0-22-generic x86_64
  ApportVersion: 2.28.0-0ubuntu1
  Architecture: amd64
  CasperMD5CheckResult: pass
  CrashCounter: 1
  CurrentDesktop: XFCE
  Date: Wed Apr 17 07:32:30 2024
  ExecutablePath: /usr/bin/filezilla
  InstallationDate: Installed on 2024-04-17 (0 days ago)
  InstallationMedia: Xubuntu 24.04 LTS "Noble Numbat" - Beta amd64 (20240417)
  JournalErrors: -- No entries --
  ProcCmdline: filezilla
  Signal: 6
  SignalName: SIGABRT
  SourcePackage: filezilla
  StacktraceTop:
   ?? () from /lib/x86_64-linux-gnu/libfilezilla.so.42
   ?? () from /lib/x86_64-linux-gnu/libfilezilla.so.42
   ?? () from /lib/x86_64-linux-gnu/libfilezilla.so.42
   ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
   start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:447
  Title: filezilla crashed with SIGABRT in start_thread()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sudo users
  separator:

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