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[PATCH] dm crypt: Fix data corruption with dm-crypt over RAID5

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Fix corruption issue with dm-crypt on top of software raid5. Cancelled
readahead bio's that report no error, just have BIO_UPTODATE cleared
were reported as successful reads to the higher layers (and leaving
random content in the buffer cache). Already fixed in 2.6.19.

Signed-off-by: Christophe Saout <christophe@saout.de>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
This commit is contained in:
Christophe Saout
2006-12-02 03:27:56 +01:00
committed by Chris Wright
parent 8a4ab56748
commit 43e5eb5c8c
1 changed files with 4 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/md/dm-crypt.c
+4 -2
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@@ -717,13 +717,15 @@ static int crypt_endio(struct bio *bio, unsigned int done, int error)
if (bio->bi_size)
return 1;
if (!bio_flagged(bio, BIO_UPTODATE) && !error)
error = -EIO;
bio_put(bio);
/*
* successful reads are decrypted by the worker thread
*/
if ((bio_data_dir(bio) == READ)
&& bio_flagged(bio, BIO_UPTODATE)) {
if (bio_data_dir(io->bio) == READ && !error) {
kcryptd_queue_io(io);
return 0;
}