Ubuntu
task package

task crashed with SIGSEGV in fseek()

Bug #733942 reported by Ron Lusk on 2011-03-12

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	task (Ubuntu)	Fix Released	High	Bryce Harrington
	Natty	Invalid	High	Bryce Harrington	Ubuntu natty-updates

Bug Description

[Impact]
Crash that occurs when using task to track completed tasks associated with a project. Since that is a normal activity for users, this issue is important.

[Development Branch]
This crash was found and fixed in task 1.9.4 (see upstream bug #555). We are going to be shipping this version in oneiric. I've confirmed this bug does not reproduce on oneiric.

[Stable Branch]
Patch cherrypicked and added to task, uploaded to natty-proposed as 1.9.3-1ubuntu1.

[Test Case]
$ task log pro:india-dinner Prepare Indian food

Output should be as follows:

Logged task.
The project 'india-dinner' has changed. Project 'india-dinner' is 0% complete (0 of 0 tasks remaining).

Bugged version segfaults

[Regression Potential]
None really. The patch simply delays when the task database is unlocked for a couple statements, which is a very modest change. The patch has been included in 1.9.4 for some time without further issue (reviewed the 1.9.4 changelog for other project-related bugs and there have been no other fixes related to this).

[Original Report]

Running task as "task shell". Entered command
log +india +test project:india-dinner due:today Prepare Indian food
and it SEGV'd

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: task 1.9.3-1
ProcVersionSignature: Ubuntu 2.6.38-6.34-generic 2.6.38-rc7
Uname: Linux 2.6.38-6-generic i686
Architecture: i386
Date: Sat Mar 12 13:03:53 2011
ExecutablePath: /usr/bin/task
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110302)
ProcCmdline: task shell
ProcEnviron:
SHELL=/bin/bash
LANG=en_US.UTF-8
LANGUAGE=en_US:en
SegvAnalysis:
Segfault happened at: 0x21e8bd <fseek+29>: mov (%esi),%eax
PC (0x0021e8bd) ok
source "(%esi)" (0x00000000) not located in a known VMA region (needed readable region)!
destination "%eax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: task
StacktraceTop:
fseek () from /lib/libc.so.6
?? ()
?? ()
?? ()
?? ()
Title: task crashed with SIGSEGV in fseek()
UpgradeStatus: Upgraded to natty on 2011-03-10 (1 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

See original description

Tags:

Related branches

lp://staging/ubuntu/natty-proposed/task

Revision history for this message

Ron Lusk (luskwater) wrote on 2011-03-12:

Dependencies.txt Edit (565 bytes, text/plain; charset="utf-8")
Disassembly.txt Edit (736 bytes, text/plain; charset="utf-8")
ProcMaps.txt Edit (3.3 KiB, text/plain; charset="utf-8")
ProcStatus.txt Edit (772 bytes, text/plain; charset="utf-8")
Registers.txt Edit (448 bytes, text/plain; charset="utf-8")
Stacktrace.txt Edit (785 bytes, text/plain; charset="utf-8")
ThreadStacktrace.txt Edit (811 bytes, text/plain; charset="utf-8")

Revision history for this message

Apport retracing service (apport) wrote on 2011-03-12:

StacktraceTop:
fseek () from /lib/libc.so.6
TDB::loadCompleted (this=0x816f968, tasks=..., filter=...) at TDB.cpp:394
TDB::load (this=0x816f968, tasks=..., filter=...) at TDB.cpp:271
onProjectChange (task=..., scope=true) at report.cpp:2884
handleLog (outs=...) at command.cpp:203

Revision history for this message

Apport retracing service (apport) wrote on 2011-03-12: Stacktrace.txt

Stacktrace.txt Edit (5.9 KiB, text/plain)

Revision history for this message

Apport retracing service (apport) wrote on 2011-03-12: ThreadStacktrace.txt

ThreadStacktrace.txt Edit (5.9 KiB, text/plain)

Changed in task (Ubuntu):
importance:	Undecided → Medium
tags:	removed: need-i386-retrace

Revision history for this message

Bryce Harrington (bryce) wrote on 2011-07-22:

Hmm, worked for me (with 1.9.4):

humber:~/src/Files/Admin$ task shell
task 1.9.4 shell

Enter any task command (such as 'list'), or hit 'Enter'.
There is no need to include the 'task' command itself.
Enter 'quit' (or 'bye', 'exit') to end the session.

task> log +india +test project:india-dinner due:today Prepare Indian food
Logged task.
The project 'india-dinner' has changed. Project 'india-dinner' is 0% complete (0 of 0 tasks remaining).

task>

visibility:

private → public

Revision history for this message

Bryce Harrington (bryce) wrote on 2011-07-22:

Reproduced on 1.9.3 (near-stock ubuntu 11.04):

lynmouth:~$ task shell
A configuration file could not be found in /home/bryce

Would you like a sample /home/bryce/.taskrc created, so taskwarrior can proceed? (y/n) y
task 1.9.3 shell

Enter any task command (such as 'list'), or hit 'Enter'.
There is no need to include the 'task' command itself.
Enter 'quit' to end the session.

task> log +india +test project:india-dinner due:today Prepare Indian food
Segmentation fault

Revision history for this message

Bryce Harrington (bryce) wrote on 2011-07-22:

This is sufficient to crash it:

task> log project:india-dinner Prepare Indian food
Segmentation fault

Revision history for this message

Bryce Harrington (bryce) wrote on 2011-07-22:

This is bug http://taskwarrior.org/issues/555

[Tried linking it in launchpad but launchpad doesn't seem to recognize the Redmine bug tracker (LP: #324387)

Bryce Harrington (bryce) on 2011-07-22

Changed in task (Ubuntu):
assignee:	nobody → Bryce Harrington (bryce)
status:	New → In Progress

Revision history for this message

Bryce Harrington (bryce) wrote on 2011-07-22:

After applying upstream patch to our packaging, issue does not reproduce:

lynmouth:~$ task shell
task 1.9.3 shell

Enter any task command (such as 'list'), or hit 'Enter'.
There is no need to include the 'task' command itself.
Enter 'quit' to end the session.

task> log +india +test project:india-dinner due:today Prepare Indian food
Logged task.
The project 'india-dinner' has changed. Project 'india-dinner' is 0% complete (0 of 0 tasks remaining).

task>

Changed in task (Ubuntu):
importance:	Medium → High
description:	updated

Revision history for this message

Bryce Harrington (bryce) wrote on 2011-07-22:

#10

Patch cherrypicked and uploaded to natty-proposed.

Changed in task (Ubuntu Natty):
assignee:	nobody → Bryce Harrington (bryce)
importance:	Undecided → High
milestone:	none → natty-updates
status:	New → Fix Committed

Bryce Harrington (bryce) on 2011-07-22

description:

updated

Bryce Harrington (bryce) on 2011-07-23

description:

updated

Revision history for this message

Chris Halse Rogers (raof) wrote on 2011-07-25: Please test proposed package

#11

Hello Ron, or anyone else affected,

Accepted task into natty-proposed, the package will build now and be available in a few hours. Please test and give feedback here. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you in advance!

Changed in task (Ubuntu):
status:	In Progress → Fix Released
tags:	added: verification-needed

Revision history for this message

dino99 (9d9) wrote on 2013-05-10:

#12

eol reached https://wiki.ubuntu.com/Releases

Changed in task (Ubuntu Natty):
status:	Fix Committed → Invalid

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Ubuntutask package

task crashed with SIGSEGV in fseek()

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