From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 81D5F174F0 for ; Wed, 9 Aug 2023 11:12:46 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 044A2C433C8; Wed, 9 Aug 2023 11:12:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1691579566; bh=OuBl6LeN4vGS+UWo9BMSriApSn3gH5ngsNYxMOTIVzQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=vLBFmPSOMk2V/prsqiUPJGkv9T+3tuILkhezzfPvFY8bh/fG04NfOWSATpwFQpTb9 BIbyYoOwgzF6r5TI8iUQG14daskW4jEpydI4BH1P40snJFgr9vwzKyz42PXxw4o3U/ BZOsuCP4ZqwbsuV7mWw6BKOTd9czW2lOn0Z9DaRw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Andy Shevchenko , Kalle Valo , Sasha Levin Subject: [PATCH 4.19 036/323] wifi: ray_cs: Utilize strnlen() in parse_addr() Date: Wed, 9 Aug 2023 12:37:54 +0200 Message-ID: <20230809103659.773315333@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230809103658.104386911@linuxfoundation.org> References: <20230809103658.104386911@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Andy Shevchenko [ Upstream commit 9e8e9187673cb24324f9165dd47b2b28f60b0b10 ] Instead of doing simple operations and using an additional variable on stack, utilize strnlen() and reuse len variable. Signed-off-by: Andy Shevchenko Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20220603164414.48436-1-andriy.shevchenko@linux.intel.com Stable-dep-of: 4f8d66a9fb2e ("wifi: ray_cs: Fix an error handling path in ray_probe()") Signed-off-by: Sasha Levin --- drivers/net/wireless/ray_cs.c | 16 +++++++--------- 1 file changed, 7 insertions(+), 9 deletions(-) diff --git a/drivers/net/wireless/ray_cs.c b/drivers/net/wireless/ray_cs.c index 8704bae39e1bf..f15714f19d0ff 100644 --- a/drivers/net/wireless/ray_cs.c +++ b/drivers/net/wireless/ray_cs.c @@ -1651,31 +1651,29 @@ static void authenticate_timeout(struct timer_list *t) /*===========================================================================*/ static int parse_addr(char *in_str, UCHAR *out) { + int i, k; int len; - int i, j, k; int status; if (in_str == NULL) return 0; - if ((len = strlen(in_str)) < 2) + len = strnlen(in_str, ADDRLEN * 2 + 1) - 1; + if (len < 1) return 0; memset(out, 0, ADDRLEN); status = 1; - j = len - 1; - if (j > 12) - j = 12; i = 5; - while (j > 0) { - if ((k = hex_to_bin(in_str[j--])) != -1) + while (len > 0) { + if ((k = hex_to_bin(in_str[len--])) != -1) out[i] = k; else return 0; - if (j == 0) + if (len == 0) break; - if ((k = hex_to_bin(in_str[j--])) != -1) + if ((k = hex_to_bin(in_str[len--])) != -1) out[i] += k << 4; else return 0; -- 2.39.2