grub-mkdevicemap crashed with SIGSEGV in qsort_r()

[Wael Ali Al-Akhali]

during installation

ProblemType: Crash
DistroRelease: Ubuntu 10.10
Package: grub-common 1.98+20100804-5ubuntu3
ProcVersionSignature: Ubuntu 2.6.35-22.33-generic 2.6.35.4
Uname: Linux 2.6.35-22-generic i686
Architecture: i386
Date: Mon Oct 18 02:02:52 2010
ExecutablePath: /usr/sbin/grub-mkdevicemap
LiveMediaBuild: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
ProcCmdline: grub-mkdevicemap --no-floppy -m -
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0xa594ab: cmp %cl,(%edx)
 PC (0x00a594ab) ok
 source "%cl" ok
 destination "(%edx)" (0x00000000) not located in a known VMA region (needed writable region)!
SegvReason: writing NULL VMA
Signal: 11
SourcePackage: grub2
StacktraceTop:
 ?? () from /lib/libc.so.6
 ?? ()
 ?? () from /lib/libc.so.6
 ?? () from /lib/libc.so.6
 qsort_r () from /lib/libc.so.6
Title: grub-mkdevicemap crashed with SIGSEGV in qsort_r()
UserGroups:

[Apport retracing service (apport)]

StacktraceTop:
 __strcmp_ssse3 () at ../sysdeps/i386/i686/multiarch/strcmp-ssse3.S:77
 compare_devices (a=0x82738b0, b=0x82738b8)
 msort_with_tmp (p=<value optimized out>,
 msort_with_tmp (p=<value optimized out>,
 *__GI_qsort_r (b=0x82738a0, n=5, s=<value optimized out>,

[Colin Watson (cjwatson)]

Thanks for your report. Somebody else reported this upstream and I fixed it - the fix is in 1.99~20101124-1ubuntu1, which I uploaded to Natty today:

2010-11-23 Colin Watson <email address hidden>

        * util/deviceiter.c (compare_devices): If the by-id link for a
        device couldn't be resolved, fall back to sorting by the by-id link
        rather than segfaulting.
        Reported and tested by: Daniel Mierswa.

You should be able to avoid it by fixing whatever broken symlinks you have in /dev/disk/by-id/, though.