Messages in this thread | | | Date | Sat, 3 Feb 2007 17:49:47 +0000 | From | Jörn Engel <> | Subject | Re: [patch 1/9] fs: libfs buffered write leak fix |
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On Sat, 3 February 2007 02:33:16 +0100, Nick Piggin wrote: > > If doing a partial-write, simply clear the whole page and set it uptodate > (don't need to get too tricky).
That sounds just like a bug I recently fixed in logfs. prepare_write() would clear the page, commit_write() would write the whole page. Bug can be reproduced with a simple testcate:
echo -n foo > foo echo -n bar >> foo cat foo
With the bug, the second write will replace "foo" with "\0\0\0" and cat will return "bar". Doing a read instead of clearing the page will return "foobar", as would be expected.
Can you hit the same bug with your patch or did I miss something?
Jörn
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