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Tasklist

FS#29762 - Random Checksum Results 3.3+

Attached to Project: Arch Linux
Opened by Vasthu (vasthu) - Saturday, 05 May 2012, 11:59 GMT
Last edited by Gaetan Bisson (vesath) - Saturday, 05 May 2012, 13:51 GMT
Task Type Bug Report
Category Packages: Core
Status Closed
Assigned To No-one
Architecture x86_64
Severity Critical
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 0
Private No

Details

Description:
Running the file hash programs (md5sum, sha1sum, sha256sum, sha512sum) may return random result for some files?

I believe this is critical since pacman (and a lot of other things) uses the hash functions to check for file integrity.

Additional info:
* linux 3.3.4-2
* linux 3.3.1-1 (not as bad as 3.3.4, but still occurs)
* coreutils 8.16-2

Hardware-related:
* AMD Athlon II X2 250 Processor
* amd-ucode 2012.01.17-2

Steps to reproduce:
Hard to reproduce... Testing on various large files 40MB+ reveals the problem more often than smaller files.
Can't guarantee anything, but you can use my 'sumtest.sh' pass it a file path.
It does a hash once, then loop 30 times checking the results of subsequent hashes.
This task depends upon

Closed by  Gaetan Bisson (vesath)
Saturday, 05 May 2012, 13:51 GMT
Reason for closing:  Works for me
Comment by Pierre Schmitz (Pierre) - Saturday, 05 May 2012, 12:14 GMT
Did you test this on other computers as well? Usually such problems are a symptom of a broken cpu or ram.
Comment by Vasthu (vasthu) - Saturday, 05 May 2012, 12:36 GMT
I suppose, have to wait until Monday at work. Or I can try booting up a live linux.

EDIT:
Well I didn't actually think of any hardware problems until the end of the day. So yea.. bad RAM after spending the whole day on this issue.

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