Messages in this thread | | | Date | Thu, 3 Nov 2005 10:49:56 +1100 | From | Nathan Scott <> | Subject | Re: XFS information leak during crash |
| |
On Thu, Nov 03, 2005 at 12:36:29AM +0100, Jan Kasprzak wrote: > ... > Yes, of course. However, the issue is probably much worse > on XFS, because on XFS it probably affects not only the files being > created/extended, but also the files being rewritten. Most other
No, thats not correct - XFS behaves as most filesystems do and will write over the top of existing data.
> filesystems rewrite the files in-place, so when you rewrite the file, > even with data=writeback you get only the mix of the old and new > contents. Not somebody else's random data.
XFS also rewrites files in-place. You will never get someone else's current data (that would be metadata corruption...), it would only ever be uninitialised, previously-free space. But as I said, other filesystems have the same window in which this can happen (in the absence of stronger data ordering/journalling semantics, of course).
cheers.
-- Nathan - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |