[Linux-kernel-mentees] [PATCH] block: Fix use-after-free in bdev_del_partition()

Christoph Hellwig hch at lst.de
Thu Sep 3 06:59:50 UTC 2020


On Thu, Sep 03, 2020 at 02:55:34AM -0400, Peilin Ye wrote:
> In bdev_del_partition(), `part` is being looked up outside the critical
> section. This is causing bdev_del_partition() to delete the same partition
> more than once. Fix it by reverting commit cddae808aeb7.

We've already fix the problem properly:

https://git.kernel.dk/cgit/linux-block/commit/?h=block-5.9&id=08fc1ab6d748ab1a690fd483f41e2938984ce353


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