Dear Song, Zhang and Christoph,
Am 29.07.23 um 12:46 schrieb Song Liu:
On Sat, Jul 15, 2023 at 5:45 PM Zhang Shurong wrote:
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?
Yes, please write a patch to delete the multipath code.
How would fixing this bug work with the stable series? Probably a
removal patch wouldn’t be picked, right? Shouldn’t the fix be accepted
in master, and then the code be removed?
Kind regards,
Paul
