Your message dated Mon, 18 Oct 2010 00:14:00 +0200
with message-id <[email protected]>
and subject line Re: grub-probe: hangs when reading a corrupt partition table
has caused the Debian Bug report #519223,
regarding grub-probe: hangs when reading a corrupt partition table
to be marked as done.
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--
519223: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=519223
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: grub-common
Version: 1.96+20080724-16
Severity: normal
Hello,
If one of the disks in /boot/grub/device.map has the attached partition
table, grub-probe will get stuck in an infinite loop in the
pc_partition_map_iterate() function (in partmap/pc.c). I discovered
this while installing to a system with several external SAS disks -- if
I disconnected the SAS enclosure, the install worked; otherwise it would
hang at the grub-install stage. Several of my disks had the same
corrupt table, but I'm not really sure where it came from. In any case,
grub-probe should just give up on the corrupt partition table, rather
than getting into an infinite loop.
Steps to reproduce:
1. Copy the partition table to a scratch disk:
# dd if=corrupt-table.dat of=/dev/sdb
2. Make sure the scratch disk is in /boot/grub/device.map (or create
one to use in the next step).
3. Run grub-probe:
# grub-probe --device-map=/boot/grub/device.map -t device / -v -v
Expected results:
It quickly finishes, spitting out the device that root is on.
Actual results:
It gets stuck doing the same thing over and over, something like
/tmp/grub/grub2-1.96+20080724/kern/disk.c:368: Reading `hd2'...
/tmp/grub/grub2-1.96+20080724/partmap/pc.c:143: partition 0: flag 0x0, type
0x5, start 0x0, len 0x11177330
/tmp/grub/grub2-1.96+20080724/partmap/pc.c:143: partition 1: flag 0x0, type
0x0, start 0x0, len 0x0
/tmp/grub/grub2-1.96+20080724/partmap/pc.c:143: partition 2: flag 0x0, type
0x0, start 0x0, len 0x0
/tmp/grub/grub2-1.96+20080724/partmap/pc.c:143: partition 3: flag 0x0, type
0x0, start 0x0, len 0x0
/tmp/grub/grub2-1.96+20080724/kern/disk.c:368: Reading `hd2'...
/tmp/grub/grub2-1.96+20080724/partmap/pc.c:143: partition 0: flag 0x0, type
0x5, start 0x0, len 0x11177330
/tmp/grub/grub2-1.96+20080724/partmap/pc.c:143: partition 1: flag 0x0, type
0x0, start 0x0, len 0x0
/tmp/grub/grub2-1.96+20080724/partmap/pc.c:143: partition 2: flag 0x0, type
0x0, start 0x0, len 0x0
/tmp/grub/grub2-1.96+20080724/partmap/pc.c:143: partition 3: flag 0x0, type
0x0, start 0x0, len 0x0
[ ... ]
--
John Wright <[email protected]>
corrupt-table.dat
Description: Binary data
--- End Message ---
--- Begin Message ---
This bug was fixed upstream and fixed version uploaded
--
Regards
Vladimir 'φ-coder/phcoder' Serbinenko
signature.asc
Description: OpenPGP digital signature
--- End Message ---
