w.procps crashed with SIGSEGV in _IO_vfscanf_internal()

[Adam Koczur]

Binary package hint: procps

The same problem with uptime and ps:

adam@nostromo:~$ uptime
Segmentation fault (core dumped)

adam@nostromo:~$ ps

Signal 11 (SEGV) caught by ps (procps version 3.2.8).
Please send bug reports to <email address hidden> or <email address hidden>

ProblemType: Crash
DistroRelease: Ubuntu 10.10
Package: procps 1:3.2.8-9ubuntu3
ProcVersionSignature: Ubuntu 2.6.35-21.31-generic 2.6.35.4
Uname: Linux 2.6.35-21-generic i686
Architecture: i386
Date: Wed Sep 15 18:49:35 2010
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/w.procps
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
ProcCmdline: w
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, user)
 LANG=en_US.utf8
SegvAnalysis:
 Segfault happened at: 0x159007 <_IO_vfscanf_internal+5159>: add %al,(%eax)
 PC (0x00159007) ok
 source "%al" ok
 destination "(%eax)" (0x00000034) not located in a known VMA region (needed writable region)!
SegvReason: writing NULL VMA
Signal: 11
SourcePackage: procps
StacktraceTop:
 _IO_vfscanf_internal (s=0x9166070, format=0x2691e0 "\342r$", argptr=0x9166240 "\b`\026\t@\320t\267\226\t", errp=0x9166428) at vfscanf.c:1926
 _IO_vsscanf (string=0x87ec60 "44134.74 11414.90\n", format=0x87b515 "%lf %lf", args=0xbf841128 "P\021\204\277H\021\204\277\001") at iovsscanf.c:45
 __sscanf (s=0x87ec60 "44134.74 11414.90\n", format=0x87b515 "%lf %lf") at sscanf.c:34
 uptime () from /lib/libproc-3.2.8.so
 sprint_uptime () from /lib/libproc-3.2.8.so
Title: w.procps crashed with SIGSEGV in _IO_vfscanf_internal()
UserGroups: adm admin cdrom dialout dip lpadmin plugdev sambashare src vboxusers

[Apport retracing service (apport)]

StacktraceTop:
 _IO_vfscanf_internal (s=0x9166070, format=0x2691e0 "�r$",
 _IO_vsscanf (string=0x87ec60 "44134.74 11414.90\n",
 __sscanf (s=0x87ec60 "44134.74 11414.90\n",
 uptime (uptime_secs=0xbf8411a8, idle_secs=0xbf8411a0)
 sprint_uptime () at proc/whattime.c:48

[Adam Koczur (sbv)]

The problem has now gone. I didn't touch my computer for a couple of days and after I booted it again, procps is all right, not segfaulting any more.