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[ts-7000] Yaffs2 bug discovered.

To:
Subject: [ts-7000] Yaffs2 bug discovered.
From: "dawydiuk" <>
Date: Fri, 05 Jan 2007 17:21:33 -0000
Hello all,

We recently uncovered a bug in the Yaffs2 filesystem, we've contacted 
the Yaffs developers and have resolved the problem.

Description of bug:

If fchmod is called immediately after several writes, the data will 
not be properly written to flash. This won't become apparent until 
after the filesystem has been unmounted and remounted. 

Software affected:

We have found the original ftp server(pureftpd) we have been shipping 
would fchmod a file after it had been written. Therefore file 
corruption was occuring when a file was uploaded via ftp. We have 
since upgraded to version 1.0.21 of pureftpd(this was an unrelated 
issue), and we have found fchmod is no longer called after writing 
the file.

064ce2c449cfcd0cb1726dcb4f8c1ec6  pureftpd version 1.0.21
da8dba5c18a23e2fb03bf536222d1cc5  pureftpd corrupted data

ftp://oz.embeddedarm.com/pure-ftpd/1.0.21/ftpd

//Eddie




 
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