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staging: wfx: Use flex_array_size() helper in memcpy()

Make use of the flex_array_size() helper to calculate the size of a
flexible array member within an enclosing structure.

This helper offers defense-in-depth against potential integer
overflows, while at the same time makes it explicitly clear that
we are dealing with a flexible array member.

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20200729233557.GA17693@embeddedor
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gustavo A. R. Silva 2020-07-29 18:35:57 -05:00 committed by Greg Kroah-Hartman
parent 051d2d09de
commit 3e1f8882a9

View File

@ -113,7 +113,7 @@ int hif_set_beacon_filter_table(struct wfx_vif *wvif, int tbl_len,
if (!val)
return -ENOMEM;
val->num_of_info_elmts = cpu_to_le32(tbl_len);
memcpy(val->ie_table, tbl, tbl_len * sizeof(*tbl));
memcpy(val->ie_table, tbl, flex_array_size(val, ie_table, tbl_len));
ret = hif_write_mib(wvif->wdev, wvif->id,
HIF_MIB_ID_BEACON_FILTER_TABLE, val, buf_len);
kfree(val);