From patchwork Wed Aug 28 03:03:20 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yafang Shao X-Patchwork-Id: 13780357 Received: from mail-pj1-f49.google.com (mail-pj1-f49.google.com [209.85.216.49]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6A7B23AC2B; Wed, 28 Aug 2024 03:04:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.49 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724814274; cv=none; b=V9twv6n9sy8lRh/0988qSnCEQTuoT7SJzS04F6ibAR+0IKB202Bv95ocRvQ26nP8ybOTGIrXwMyrlKIRhPGORJrOx+iR3pQfbSU0DnuFoJIa7V096ByXYfS7aJZNvx1jEDmstiKdSiExsKz0YPrg09MEAMdOP4YB3ZsA7dloUAs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724814274; c=relaxed/simple; bh=Q/ccAtoYqO3u8X9Ue4dTvCxK0m9BnFNMdv5kHBNaFRc=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=MXckLI0Qo8PrkOulT7oju8M40JPs6X8EV0azlYeSmTVHB5KoL48Fx77ogsgirrkLUB/HTa2m9rb2TuMkzxPyhwBHVmV/EqswzTTjZriZzMMmjbhRZprto5+Mzw7D5mholegDeZoc2bQKOgptlwBjQHg6/CceCU3GiiPP2mpGHU8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=nW23865s; arc=none smtp.client-ip=209.85.216.49 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="nW23865s" Received: by mail-pj1-f49.google.com with SMTP id 98e67ed59e1d1-2d1daa2577bso4809878a91.2; Tue, 27 Aug 2024 20:04:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1724814272; x=1725419072; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=XVdwfZoyZWde9aSN6zhMbNNaJxIyi5X3Dr8kaez296Q=; b=nW23865sF0/mBeLQHD04jNVipIxIWlvO5TODsVQNNTPgUnsVDsHUZaQylUA11cUGSF LoAKb3GBjtTFzje86c1TWIqTVJBO8XOiCk0LO9GRqYGGFLret7XLss6cIgG9OTRsU1pE diMWZa8GDvQsP7kwXhO78crl9pKtR5cUsFl6N4pjbV9lghJTU+oPnshrH995Tcc4CwsK Lf/3LO+i0aSYLrZlonlnJdiQUaBK1mhbaiPjIvvDFHQgh/ONnjEzrZ6urDHu7bLrBupI LgKfAC/KwR0VKexV4E4vkwju8JMrfTWIHPepB9T1bWnn39caeSlnsRogB3pxvzmh7gc3 kweQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1724814272; x=1725419072; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=XVdwfZoyZWde9aSN6zhMbNNaJxIyi5X3Dr8kaez296Q=; b=NAXiVyeiRB5PftoduwVYDWkoEPgrUv3sayifAa8sJiC/7iQnJxnAxFxmZNi7MRm8Ho mWeZGG9sd7UEY72tUZ4wFXKImQOITQCajWWXLIU5bycYWBqrix3K8sxIPoZ9Sq/GsnRd LMj+obacFrwPcFTAjabyHE1tQzBXsYIkms8pxcSmFO1lhqrYXN3vYi1mhB/rLjELl9yr 53/3twk3BiAd5VdAkLLRWA0BjFiKS72rXbGAjyKDkZ+hwhpM9c4av2A6LjVc2pf3R1PF XPNTmSjK7+wc9cqzv/4m3NoVcjRESMsoQv6pJv2z4OWbbzLFrcs/pmXmChwLyPslL6eX w5lQ== X-Forwarded-Encrypted: i=1; AJvYcCUn8ZvsRLsYXcU7VACNNFdq1rEA5CLZRaZ2AACLkm9e0T40WnoQ8HTnzqz63J4eopMBS00g/XQMqw==@vger.kernel.org, AJvYcCV1hX5U9OK+XcxWXrSQTOWl6Lwdo+2EFn+dIY+sPvit1YZIzTbtd9mQdi9ZMoKuSo+9VQ/L3LtEkPDJ2y7kurifYNxW@vger.kernel.org, AJvYcCV972f1v5rYqE6xpwL42EXDoOmXIisEwDE1ufR1npdp8U67mvCf+j8NQHJv4FNz58Zi5YwvTbEx@vger.kernel.org, AJvYcCVa7MYA+fMEZ8A3x/RNAw0+fu2Oc1SS/cll50pMucqzOQBH2UD23DSqwoK41eVNksSOizqPLdswryZomfeyQg==@vger.kernel.org, AJvYcCXIzGD2abXQIW5PiiesqQ6u/u93npEwlgwXJc//YnQpVQ6zFJQQArWgUJUM+Jd9wHhOgYz1Vw==@vger.kernel.org, AJvYcCXboPl0wP1CxULId4IfzvLJ+OS4LFGv5yeapCzFpoJBuI8I65FdSSEcUbO7b/4hBvd2mLtD@vger.kernel.org, AJvYcCXhmJizTNzz2lsDqkBjGtf1vVZOf1tL4Zf0j+8S+B0fnbWuZP1JF1dYKYtHCzeoOAeIDzshizMHHKEjfF2G8gPB4QA9vYPl@vger.kernel.org X-Gm-Message-State: AOJu0Yw3Zwfm2tMdcwzWtt8UaVNB+Mc6n0M+Uvkw3nBm1IAePSLl2T6r eP405Haqb/Uje8tZRa3KzJJWZE5BfFNxxoC6QzpYfXnAuzXMLwiZ X-Google-Smtp-Source: AGHT+IFb9q9yq9VVSwLC6AkI1/p1bhkyyRxy6O/7jYlaHznbpdfEJAgSG3Tzmhmlf5xXUEBbcGAPmA== X-Received: by 2002:a17:90b:356:b0:2c9:61f9:a141 with SMTP id 98e67ed59e1d1-2d646bf605amr17374556a91.16.1724814272564; Tue, 27 Aug 2024 20:04:32 -0700 (PDT) Received: from localhost.localdomain ([39.144.104.43]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2d8445db8f6sm317977a91.1.2024.08.27.20.04.23 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 27 Aug 2024 20:04:32 -0700 (PDT) From: Yafang Shao To: akpm@linux-foundation.org Cc: torvalds@linux-foundation.org, alx@kernel.org, justinstitt@google.com, ebiederm@xmission.com, alexei.starovoitov@gmail.com, rostedt@goodmis.org, catalin.marinas@arm.com, penguin-kernel@i-love.sakura.ne.jp, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, audit@vger.kernel.org, linux-security-module@vger.kernel.org, selinux@vger.kernel.org, bpf@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, Yafang Shao , "David S. Miller" , David Ahern , Eric Dumazet , Jakub Kicinski , Paolo Abeni Subject: [PATCH v8 7/8] net: Replace strcpy() with strscpy() Date: Wed, 28 Aug 2024 11:03:20 +0800 Message-Id: <20240828030321.20688-8-laoar.shao@gmail.com> X-Mailer: git-send-email 2.30.1 (Apple Git-130) In-Reply-To: <20240828030321.20688-1-laoar.shao@gmail.com> References: <20240828030321.20688-1-laoar.shao@gmail.com> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 To prevent errors from occurring when the src string is longer than the dst string in strcpy(), we should use strscpy() instead. This approach also facilitates future extensions to the task comm. Signed-off-by: Yafang Shao Cc: "David S. Miller" Cc: David Ahern Cc: Eric Dumazet Cc: Jakub Kicinski Cc: Paolo Abeni Reviewed-by: Justin Stitt --- net/ipv6/ndisc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c index b8eec1b6cc2c..cf7c36463b33 100644 --- a/net/ipv6/ndisc.c +++ b/net/ipv6/ndisc.c @@ -1944,7 +1944,7 @@ static void ndisc_warn_deprecated_sysctl(const struct ctl_table *ctl, static char warncomm[TASK_COMM_LEN]; static int warned; if (strcmp(warncomm, current->comm) && warned < 5) { - strcpy(warncomm, current->comm); + strscpy(warncomm, current->comm); pr_warn("process `%s' is using deprecated sysctl (%s) net.ipv6.neigh.%s.%s - use net.ipv6.neigh.%s.%s_ms instead\n", warncomm, func, dev_name, ctl->procname,