diff options
| author | NeilBrown <neilb@suse.de> | 2015-05-08 18:19:34 +1000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-06-06 08:21:06 -0700 |
| commit | 37528b574e9f849ba5fc4c1dc38037691094a6be (patch) | |
| tree | 58d31aa9f466f681b6feb38de2022153d9c6d0cf | |
| parent | a80e880dc4cb44350bfdd27d5dc3b4bce9d8e784 (diff) | |
| download | lwn-37528b574e9f849ba5fc4c1dc38037691094a6be.tar.gz lwn-37528b574e9f849ba5fc4c1dc38037691094a6be.zip | |
md/raid5: don't record new size if resize_stripes fails.
commit 6e9eac2dcee5e19f125967dd2be3e36558c42fff upstream.
If any memory allocation in resize_stripes fails we will return
-ENOMEM, but in some cases we update conf->pool_size anyway.
This means that if we try again, the allocations will be assumed
to be larger than they are, and badness results.
So only update pool_size if there is no error.
This bug was introduced in 2.6.17 and the patch is suitable for
-stable.
Fixes: ad01c9e3752f ("[PATCH] md: Allow stripes to be expanded in preparation for expanding an array")
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/md/raid5.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index cd2f96b2c572..007ab861eca0 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -1933,7 +1933,8 @@ static int resize_stripes(struct r5conf *conf, int newsize) conf->slab_cache = sc; conf->active_name = 1-conf->active_name; - conf->pool_size = newsize; + if (!err) + conf->pool_size = newsize; return err; } |