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Commit 4f7d853b authored by Zhang Shurong's avatar Zhang Shurong Committed by Greg Kroah-Hartman
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md: raid1: fix potential OOB in raid1_remove_disk()



[ Upstream commit 8b0472b5 ]

If rddev->raid_disk is greater than mddev->raid_disks, there will be
an out-of-bounds in raid1_remove_disk(). We have already found
similar reports as follows:

1) commit d17f744e ("md-raid10: fix KASAN warning")
2) commit 1ebc2cec ("dm raid: fix KASAN warning in raid5_remove_disk")

Fix this bug by checking whether the "number" variable is
valid.

Signed-off-by: default avatarZhang Shurong <zhang_shurong@foxmail.com>
Reviewed-by: default avatarYu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/tencent_0D24426FAC6A21B69AC0C03CE4143A508F09@qq.com


Signed-off-by: default avatarSong Liu <song@kernel.org>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 4e547968
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