From patchwork Tue Dec 21 07:09:31 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jason Wang X-Patchwork-Id: 12689173 X-Patchwork-Delegate: kvalo@adurom.com Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 810FCC433EF for ; Tue, 21 Dec 2021 07:10:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234705AbhLUHKQ (ORCPT ); Tue, 21 Dec 2021 02:10:16 -0500 Received: from smtpbg126.qq.com ([106.55.201.22]:33305 "EHLO smtpbg587.qq.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S234654AbhLUHKQ (ORCPT ); Tue, 21 Dec 2021 02:10:16 -0500 X-QQ-mid: bizesmtp41t1640070578t2i5c3l1 Received: from localhost.localdomain (unknown [118.121.67.96]) by esmtp6.qq.com (ESMTP) with id ; Tue, 21 Dec 2021 15:09:36 +0800 (CST) X-QQ-SSF: 01000000002000D0K000B00A0000000 X-QQ-FEAT: d3XYZ9avhmBkxdp3cJjJUkWcvy6tvwLLFwxsRA36TCJo7BtDaJdb2vDgvmmlm F1Sa/fCRJfaPV4sA9uo+N1en9xhnntL7uMXzYyII9LmkSSqtNt6zD6XUtJ5UGteWh6DUayZ Qnp+4HpaXGq1kMcK8hEFk9y5cUNNwl+lcDurj/NOAlbwuT1AMYoIljBglk1PzEkGWOn4gvQ N/DKttYpVrdD4aXPnnobAZYOflCQ/myaDLqmvQ5/m7wYe6w3T4neelF2oYTrLnUger6MuFD BtNpgHp4qPrrdSzfmNX1lyjgMAnzQ99X7WLMQsJUy8pOcjfY/AX413zwl7tsUft/598YdXM dTZvMYCSj7Rpv27SKOxOoXJ865lFek48+4gEMqF X-QQ-GoodBg: 0 From: Jason Wang To: kuba@kernel.org Cc: davem@davemloft.net, kvalo@kernel.org, ath10k@lists.infradead.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Jason Wang Subject: [PATCH] ath10k: replace strlcpy with strscpy Date: Tue, 21 Dec 2021 15:09:31 +0800 Message-Id: <20211221070931.725720-1-wangborong@cdjrlc.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-QQ-SENDSIZE: 520 Feedback-ID: bizesmtp:cdjrlc.com:qybgspam:qybgspam2 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org The strlcpy should not be used because it doesn't limit the source length. So that it will lead some potential bugs. But the strscpy doesn't require reading memory from the src string beyond the specified "count" bytes, and since the return value is easier to error-check than strlcpy()'s. In addition, the implementation is robust to the string changing out from underneath it, unlike the current strlcpy() implementation. Thus, replace strlcpy with strscpy. Signed-off-by: Jason Wang --- drivers/net/wireless/ath/ath10k/coredump.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/net/wireless/ath/ath10k/coredump.c b/drivers/net/wireless/ath/ath10k/coredump.c index 55e7e11d06d9..fe6b6f97a916 100644 --- a/drivers/net/wireless/ath/ath10k/coredump.c +++ b/drivers/net/wireless/ath/ath10k/coredump.c @@ -1522,7 +1522,7 @@ static struct ath10k_dump_file_data *ath10k_coredump_build(struct ath10k *ar) mutex_lock(&ar->dump_mutex); dump_data = (struct ath10k_dump_file_data *)(buf); - strlcpy(dump_data->df_magic, "ATH10K-FW-DUMP", + strscpy(dump_data->df_magic, "ATH10K-FW-DUMP", sizeof(dump_data->df_magic)); dump_data->len = cpu_to_le32(len); @@ -1543,11 +1543,11 @@ static struct ath10k_dump_file_data *ath10k_coredump_build(struct ath10k *ar) dump_data->vht_cap_info = cpu_to_le32(ar->vht_cap_info); dump_data->num_rf_chains = cpu_to_le32(ar->num_rf_chains); - strlcpy(dump_data->fw_ver, ar->hw->wiphy->fw_version, + strscpy(dump_data->fw_ver, ar->hw->wiphy->fw_version, sizeof(dump_data->fw_ver)); dump_data->kernel_ver_code = 0; - strlcpy(dump_data->kernel_ver, init_utsname()->release, + strscpy(dump_data->kernel_ver, init_utsname()->release, sizeof(dump_data->kernel_ver)); dump_data->tv_sec = cpu_to_le64(crash_data->timestamp.tv_sec);