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[MTD] fix use after free in register_mtd_blktrans 

Reported-by: Dan Carpenter <error27@gmail.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Marcin Slusarz 2009-03-28 18:44:24 +01:00 committed by David Woodhouse
parent 61dd7eb876
commit 2cf3a11494
1 changed files with 2 additions and 1 deletions
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3
drivers/mtd/mtd_blkdevs.c
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@ -382,11 +382,12 @@ int register_mtd_blktrans(struct mtd_blktrans_ops *tr)
tr->blkcore_priv->thread = kthread_run(mtd_blktrans_thread, tr, tr->blkcore_priv->thread = kthread_run(mtd_blktrans_thread, tr,
"%sd", tr->name); "%sd", tr->name);
if (IS_ERR(tr->blkcore_priv->thread)) { if (IS_ERR(tr->blkcore_priv->thread)) {
int ret = PTR_ERR(tr->blkcore_priv->thread);
blk_cleanup_queue(tr->blkcore_priv->rq); blk_cleanup_queue(tr->blkcore_priv->rq);
unregister_blkdev(tr->major, tr->name); unregister_blkdev(tr->major, tr->name);
kfree(tr->blkcore_priv); kfree(tr->blkcore_priv);
mutex_unlock(&mtd_table_mutex); mutex_unlock(&mtd_table_mutex);
return PTR_ERR(tr->blkcore_priv->thread); return ret;
} }
INIT_LIST_HEAD(&tr->devs); INIT_LIST_HEAD(&tr->devs);