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md: raid0: fix error return from create_stripe_zones.

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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.

Cc: stable@vger.kernel.org
Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
NeilBrown 2013-02-21 15:36:38 +11:00
parent a646853991
commit 58ebb34c49
1 changed files with 1 additions and 1 deletions
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2
drivers/md/raid0.c
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@ -289,7 +289,7 @@ static int create_strip_zones(struct mddev *mddev, struct r0conf **private_conf)
kfree(conf->strip_zone);
kfree(conf->devlist);
kfree(conf);
*private_conf = NULL;
*private_conf = ERR_PTR(err);
return err;
}