Re: [PATCH] md: fix potential OOB in multipath_remove_disk()

[Zhang Shurong]

在 2023年7月13日星期四 CST 上午12:50:19，Christoph Hellwig 写道：
> On Thu, Jul 13, 2023 at 12:46:05AM +0800, Zhang Shurong wrote:
> > If rddev->raid_disk is greater than mddev->raid_disks, there will be
> > an out-of-bounds in multipath_remove_disk. We have already found
> > similar reports as follows:
> > 
> > 1) commit d17f744e883b ("md-raid10: fix KASAN warning")
> > 2) commit 1ebc2cec0b7d ("dm raid: fix KASAN warning in raid5_remove_disk")
> > 
> > Fix this bug by checking whether the "number" variable is
> > valid.
> 
> I think it might just be time to finally dropped the deprecated md
> multipath code instead..
Should I write another patch to delete them?