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| author | Zhang Shurong <zhang_shurong@foxmail.com> | 2023-07-22 15:53:53 +0800 |
|---|---|---|
| committer | Song Liu <song@kernel.org> | 2023-08-15 09:37:27 -0700 |
| commit | 8b0472b50bcf0f19a5119b00a53b63579c8e1e4d (patch) | |
| tree | 4e4aadbf69506e0616d32601bd97e3ce572c74f7 /drivers/md | |
| parent | a705b11b358dee677aad80630e7608b2d5f56691 (diff) | |
| download | linux-8b0472b50bcf0f19a5119b00a53b63579c8e1e4d.tar.gz linux-8b0472b50bcf0f19a5119b00a53b63579c8e1e4d.tar.bz2 linux-8b0472b50bcf0f19a5119b00a53b63579c8e1e4d.zip | |
md: raid1: fix potential OOB in raid1_remove_disk()
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 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.
Signed-off-by: Zhang Shurong <zhang_shurong@foxmail.com>
Reviewed-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/tencent_0D24426FAC6A21B69AC0C03CE4143A508F09@qq.com
Signed-off-by: Song Liu <song@kernel.org>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/raid1.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index 23d211969565..b920f9278013 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -1837,6 +1837,10 @@ static int raid1_remove_disk(struct mddev *mddev, struct md_rdev *rdev) struct r1conf *conf = mddev->private; int err = 0; int number = rdev->raid_disk; + + if (unlikely(number >= conf->raid_disks)) + goto abort; + struct raid1_info *p = conf->mirrors + number; if (rdev != p->rdev) |