grub-mount crashed with SIGSEGV in malloc()

[michiel]

Binary package hint: grub2

The start-up manager was used to adjust grub settings (resolution) after that I get this error a few minuets after login.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: grub-common 1.99~rc1-12ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
Architecture: amd64
CrashCounter: 1
Date: Tue Apr 12 14:52:40 2011
ExecutablePath: /usr/bin/grub-mount
ProcCmdline: grub-mount /dev/sda1 /var/lib/os-prober/mount
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7fdfab80b502: mov %r13,0x10(%rbx)
 PC (0x7fdfab80b502) ok
 source "%r13" ok
 destination "0x10(%rbx)" (0x00000010) not located in a known VMA region (needed writable region)!
 Stack memory exhausted (SP below stack segment)
SegvReason: writing NULL VMA
Signal: 11
SourcePackage: grub2
StacktraceTop:
 ?? () from /lib/x86_64-linux-gnu/libc.so.6
 malloc () from /lib/x86_64-linux-gnu/libc.so.6
 ?? ()
 ?? ()
 ?? ()
Title: grub-mount crashed with SIGSEGV in malloc()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

[Apport retracing service (apport)]

StacktraceTop:
 _int_malloc (av=0x7fdfabb211c0, bytes=<value optimized out>) at malloc.c:4439
 __libc_malloc (bytes=4096) at malloc.c:3660
 ?? ()
 ?? ()
 ?? ()

[Colin Watson (cjwatson)]

How big is the filesystem on /dev/sda1, and does it contain any sensitive data? If it's not too big (no more than one or two GB at the outside) and if there's nothing private on it, then it would be great if I could have a copy so that I can debug this.

[michiel (michiel-klaproos)]

/dev/sda1 is 23GB, its a 'hidden' recovery partition which I can share. The zipped image is 18G, I could also give you the first x bytes?

/dev/sda1 1 2805 22531131 1c Hidden W95 FAT32 (LBA)

[Colin Watson (cjwatson)]

That would still have been too big, but never mind - I figured out the cause and fixed this as bug 756297.