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md/raid10: fix wrong setting of max_corr_read_errors

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[ Upstream commit f8b20a405428803bd9881881d8242c9d72c6b2b2 ]

There is no input check when echo md/max_read_errors and overflow might
occur. Add check of input number.

Fixes: 1e50915fe0 ("raid: improve MD/raid10 handling of correctable read errors.")
Signed-off-by: Li Nan <linan122@huawei.com>
Reviewed-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230522072535.1523740-3-linan666@huaweicloud.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Li Nan 2023-05-22 15:25:34 +08:00 • committed by Greg Kroah-Hartman
commit 31c805a44b
1 changed files with 2 additions and 0 deletions
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2
drivers/md/md.c
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@ -4441,6 +4441,8 @@ max_corrected_read_errors_store(struct mddev *mddev, const char *buf, size_t len
rv = kstrtouint(buf, 10, &n);
if (rv < 0)
return rv;
if (n > INT_MAX)
return -EINVAL;
atomic_set(&mddev->max_corr_read_errors, n);
return len;
}