[PATCH 53/88] md: raid0: fix error return from create_stripe_zones.

From: Luis Henriques
Date: Thu Mar 14 2013 - 06:49:44 EST


3.5.7.8 -stable review patch. If anyone has any objections, please let me know.

------------------

From: NeilBrown <neilb@xxxxxxx>

commit 58ebb34c49fcfcaa029e4b1c1453d92583900f9a upstream.

Create_stripe_zones returns an error slightly differently to
raid0_run and to raid0_takeover_*.

The error returned used by the second was wrong and an error would
result in mddev->private being set to NULL and sooner or later a
crash.

So never return NULL, return ERR_PTR(err), not NULL from
create_stripe_zones.

This bug has been present since 2.6.35 so the fix is suitable
for any kernel since then.

Signed-off-by: NeilBrown <neilb@xxxxxxx>
Signed-off-by: Luis Henriques <luis.henriques@xxxxxxxxxxxxx>
---
drivers/md/raid0.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index 08e1734..06a0257 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -280,7 +280,7 @@ abort:
kfree(conf->strip_zone);
kfree(conf->devlist);
kfree(conf);
- *private_conf = NULL;
+ *private_conf = ERR_PTR(err);
return err;
}

--
1.8.1.2

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