Re: [PATCH] md: fix potential OOB in multipath_remove_disk()
From: Christoph Hellwig <hch@infradead.org>
Date: 2023-07-12 16:50:30
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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..