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path: root/drivers/infiniband/core/user_mad.c
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Diffstat (limited to 'drivers/infiniband/core/user_mad.c')
-rw-r--r--drivers/infiniband/core/user_mad.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/infiniband/core/user_mad.c b/drivers/infiniband/core/user_mad.c
index 7c2f03057dd..a64d6b4dcc1 100644
--- a/drivers/infiniband/core/user_mad.c
+++ b/drivers/infiniband/core/user_mad.c
@@ -334,10 +334,11 @@ static ssize_t ib_umad_write(struct file *filp, const char __user *buf,
ret = -EINVAL;
goto err_ah;
}
- /* Validate that management class can support RMPP */
+
+ /* Validate that the management class can support RMPP */
if (rmpp_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_ADM) {
hdr_len = offsetof(struct ib_sa_mad, data);
- data_len = length;
+ data_len = length - hdr_len;
} else if ((rmpp_mad->mad_hdr.mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) &&
(rmpp_mad->mad_hdr.mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END)) {
hdr_len = offsetof(struct ib_vendor_mad, data);