less crashed with SIGSEGV

[Till Ulen]

Binary package hint: less

How to reproduce:

1. Open a GNOME Terminal
2. Create a test file by running the command
   echo foobar > foofile
3. Run the command
   less foofile -S
4. Press :
5. Press n

This results in a segmentation fault. An error message should be shown instead.

I'm using Ubuntu 7.10 with latest security and recommended updates. Package less is version 406-0.

ProblemType: Crash
Architecture: i386
Date: Mon Mar 3 04:40:33 2008
Dependencies:
 libgcc1 1:4.2.1-5ubuntu4
 gcc-4.2-base 4.2.1-5ubuntu4
 debianutils 2.22.1
 libncurses5 5.6+20070716-1ubuntu3
 libc6 2.6.1-1ubuntu10
DistroRelease: Ubuntu 7.10
ExecutablePath: /usr/bin/less
NonfreeKernelModules: cdrom
Package: less 406-0
PackageArchitecture: i386
ProcCmdline: less foofile -S
ProcCwd: /home/users/alexkon
ProcEnviron:
 SHELL=/bin/bash
 PATH=/home/users/alexkon/bin:/home/users/alexkon/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=en_US.UTF-8
 LANGUAGE=en_US:en
Signal: 11
SourcePackage: less
StacktraceTop:
 ?? ()
 ?? ()
 ?? ()
 ?? ()
 ?? () from /lib/tls/i686/cmov/libc.so.6
Title: less crashed with SIGSEGV
Uname: Linux chronos 2.6.22-14-generic #1 SMP Tue Feb 12 07:42:25 UTC 2008 i686 GNU/Linux
UserGroups: audio cdrom floppy fuse plugdev scanner tape
SegvAnalysis:
 Segfault happened at: 0x804b30c: testb $0x8,0x40c(%eax)
 PC (0x0804b30c) ok
 source "$0x8" ok
 destination "0x40c(%eax)" (0x0000040c) not located in a known VMA region (needed writable region)!
SegvReason: writing NULL VMA

[Apport retracing service (apport)]

StacktraceTop:ch_length () at ch.c:508
ch_seek (pos=0) at ch.c:419
jump_loc (pos=0, sline=0) at jump.c:199
repaint () at jump.c:98
error (fmt=0x805db24 "%s", parg=0xbf976f7c) at output.c:529

[Till Ulen (tillulen)]

This bug no longer occurs with less version 418-1 from Ubuntu 8.04 Hardy.