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net/ncsi: Silence runtime memcpy() false positive warning
The memcpy() in ncsi_cmd_handler_oem deserializes nca->data into a flexible array structure that overlapping with non-flex-array members (mfr_id) intentionally. Since the mem_to_flex() API is not finished, temporarily silence this warning, since it is a false positive, using unsafe_memcpy(). Reported-by: Joel Stanley <joel@jms.id.au> Link: https://lore.kernel.org/netdev/CACPK8Xdfi=OJKP0x0D1w87fQeFZ4A2DP2qzGCRcuVbpU-9=4sQ@mail.gmail.com/ Cc: Samuel Mendoza-Jonas <sam@mendozajonas.com> Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20221202212418.never.837-kees@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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@ -228,7 +228,8 @@ static int ncsi_cmd_handler_oem(struct sk_buff *skb,
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len += max(payload, padding_bytes);
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cmd = skb_put_zero(skb, len);
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memcpy(&cmd->mfr_id, nca->data, nca->payload);
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unsafe_memcpy(&cmd->mfr_id, nca->data, nca->payload,
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/* skb allocated with enough to load the payload */);
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ncsi_cmd_build_header(&cmd->cmd.common, nca);
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return 0;
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