ceph: fix divide-by-zero in __validate_layout()
The 'stripe_unit' field is 64 bits, casting it to 32 bits can result zero. Signed-off-by: Yan, Zheng <zyan@redhat.com>
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@ -41,7 +41,7 @@ static long __validate_layout(struct ceph_mds_client *mdsc,
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/* validate striping parameters */
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if ((l->object_size & ~PAGE_MASK) ||
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(l->stripe_unit & ~PAGE_MASK) ||
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(l->stripe_unit != 0 &&
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((unsigned)l->stripe_unit != 0 &&
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((unsigned)l->object_size % (unsigned)l->stripe_unit)))
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return -EINVAL;
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