From: Dan Carpenter <error27@gmail.com>
To: Alexander Viro <viro@zeniv.linux.org.uk>, tj@kernel.org
Cc: linux-fsdevel@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [patch] block: NULL dereference on error path in __blkdev_get()
Date: Sun, 13 Mar 2011 23:59:37 +0300 [thread overview]
Message-ID: <20110313205937.GI2008@bicker> (raw)
"disk" is always NULL when we goto out. There was a check for this
before, but it was removed in 69e02c59a7d9 "block: Don't check events
while open is in progress".
Signed-off-by: Dan Carpenter <error27@gmail.com>
diff --git a/fs/block_dev.c b/fs/block_dev.c
index fbe05cb..7d02afb 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1181,9 +1181,9 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part)
out_unlock_bdev:
mutex_unlock(&bdev->bd_mutex);
disk_unblock_events(disk);
- out:
module_put(disk->fops->owner);
put_disk(disk);
+ out:
bdput(bdev);
return ret;
next reply other threads:[~2011-03-13 20:59 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-13 20:59 Dan Carpenter [this message]
2011-03-14 8:58 ` [patch] block: NULL dereference on error path in __blkdev_get() Tejun Heo
2011-03-18 8:32 ` Tejun Heo
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