address@hidden: Bug#136501: Parted segfaults on startup with Minix-created partition table]

[Timshel Knoll]

Hrm - this looks more like a kernel-mode segfault than anything else
I've seen - I've forwarded it to the parted mailing list for comments.
invalid operand would suggest that there's an illegal instruction - this
should not happen!
Comments/ideas?

----- Forwarded message from Jaakko Kangasharju <address@hidden> -----

Subject: Bug#136501: Parted segfaults on startup with Minix-created partition 
table
From: Jaakko Kangasharju <address@hidden>
To: Debian Bug Tracking System <address@hidden>
X-Mailer: reportbug 1.44
Date: Sat, 02 Mar 2002 23:26:31 +0200

Package: parted
Version: 1.4.24-1
Severity: normal

Hello,

I recently installed Andrew Tanenbaum's Minix operating system on my
secondary disk, /dev/hdb.  Minix has its own disk partitioning program
used on install, which I used to create a Minix partition.  Now when I
try to run parted on /dev/hdb it segfaults immediately after being
started with the following output:
---
invalid operand: 0000
CPU:    0
EIP:    0010:[<c012e5fa>]
EFLAGS: 00010246
eax: c18270c0   ebx: 00000dd1   ecx: c18270c0   edx: 00000000
esi: c1827480   edi: 00000000   ebp: 00000000   esp: daa8fe9c
ds: 0018   es: 0018   ss: 0018
Process parted (pid: 917, stackpage=daa8f000)
Stack: 00000342 00000000 00000342 daa8ff84 00000000 03420342 c18270c0 c0172698
       00000342 00000000 00000000 00000342 daa8ff2c 00001261 dbd18840 c017d6e1
       00000342 00001261 00000000 db1f6de0 00000000 00001261 00000004 c0136d84
Call Trace: [<c0172698>] [<c017d6e1>] [<c0136d84>] [<c017bb1c>] [<c0134374>]
   [<c013a527>] [<c0106b0b>]

Code: 0f 0b 8b 41 10 85 c0 75 3d 83 7c 24 24 00 75 09 f6 c2 02 0f
 Segmentation fault
---

The fdisk program can still read the partition table, and output of
'fdisk -l /dev/hdb' is as follows:
---
Disk /dev/hdb: 255 heads, 63 sectors, 1869 cylinders
Units = cylinders of 16065 * 512 bytes

   Device Boot    Start       End    Blocks   Id  System
/dev/hdb1   *        34       639   4867695    c  Win95 FAT32 (LBA)
/dev/hdb2             1        33    265041   81  Minix / old Linux
/dev/hdb3           640      1147   4080510    5  Extended
/dev/hdb5           640      1147   4080478+   c  Win95 FAT32 (LBA)

Partition table entries are not in disk order
---

The full story of this experience is somewhat longer.  I started out
with /dev/hdb1 being at the start of /dev/hdb and there being 256MB of
empty space between that and the extended partition.  I first tried to
install Minix in that empty space, but while the partitioning program
created a partition there, Minix cannot be installed beyond the first
4GB on a disk.

At this point, I tried to use parted to move /dev/hdb1 (via the
extended partition) so that the empty space would be at the start of
/dev/hdb.  With this I got the segfault as reported above.  But I
could use cfdisk, with which I wrote the partition table, and then
parted did not segfault and I could move /dev/hdb1 to its current
position.

After this, I created the current /dev/hdb2 with the Minix partition
program and installed Minix there.  And now the trick of using cfdisk
(or fdisk) to write the partition table no longer works; I cannot get
parted to stop segfaulting.

This segfaulting does not happen with my primary drive, so I suspect
the Minix partitioning program is at fault, but parted should not
segfault even so.

-- System Information
Debian Release: unstable
Architecture: i386
Kernel: Linux bridget 2.4.10 #1 su helmi? 24 21:58:26 EET 2002 i686
Locale: address@hidden, address@hidden

Versions of packages parted depends on:
ii  e2fsprogs [libuuid1]     1.26-3          The EXT2 file system utilities and
ii  libc6                    2.2.5-3         GNU C Library: Shared libraries an
ii  libncurses5              5.2.20020112a-5 Shared libraries for terminal hand
ii  libparted1.4             1.4.24-1        The GNU Parted disk partitioning l
ii  libreadline4             4.2a-5          GNU readline and history libraries




----- End forwarded message -----

-- 
   Timshel Knoll <address@hidden>  for Debian email: <address@hidden>
      Debian GNU/Linux developer, see http://people.debian.org/~timshel/
                For GnuPG public key: finger address@hidden

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