From: Dan Carpenter <dan.carpenter@oracle.com>
To: Maxim Levitsky <maximlevitsky@gmail.com>
Cc: linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Jens Axboe <axboe@kernel.dk>
Subject: [patch 1/2] memstick: use after free in msb_disk_release()
Date: Sat, 29 Sep 2012 07:11:04 +0000 [thread overview]
Message-ID: <20120929071104.GB10993@elgon.mountain> (raw)
The original code dereferenced "msb" after freeing it.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
diff --git a/drivers/memstick/core/ms_block.c b/drivers/memstick/core/ms_block.c
index c815fe5..a8e8915 100644
--- a/drivers/memstick/core/ms_block.c
+++ b/drivers/memstick/core/ms_block.c
@@ -1983,9 +1983,9 @@ static int msb_disk_release(struct gendisk *disk)
msb->usage_count--;
if (!msb->usage_count) {
- kfree(msb);
disk->private_data = NULL;
idr_remove(&msb_disk_idr, msb->disk_id);
+ kfree(msb);
put_disk(disk);
}
}
next reply other threads:[~2012-09-29 7:11 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-29 7:11 Dan Carpenter [this message]
2012-09-29 22:09 ` [patch 1/2] memstick: use after free in msb_disk_release() Maxim Levitsky
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