From patchwork Sun Aug 4 07:56:18 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yafang Shao X-Patchwork-Id: 13752521 Received: from mail-oi1-f171.google.com (mail-oi1-f171.google.com [209.85.167.171]) (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 6AD471BC39; Sun, 4 Aug 2024 07:58:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.171 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722758334; cv=none; b=e4rMTxYfG6AWJOFQiUGL6rbBfSnHZfh4WhqXaIVeUTN4Rx1QOaob6dWcRlKV4oIvuv/r0syn6OS1noqQNAxKKfvlEit4VBmP40gnkEh+PsYSRfQBXBcqXKnnNpkZg2BdF1faKQKmQzMuL76O2yWk5fuWkNy3vI8Uq9KTw+SuFTU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722758334; c=relaxed/simple; bh=36noEVLUmWO8B4cta+fdWNDgAFM5Qm1APLVzyVo0yvw=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=P9tBYPGe3x+lDhuOvMd70dn4ZLN+W6NufBswBJ+muULrLlenLKfhOs6ElC3v0ijFG9HOWBQLLrW8TbwS9aapHFpoqqhQVYoCPyphq13w9mwS8Jfv2z8Ewqp6AFaYH+GfWd7WJ10TCyGi32adqtFUXzXsU/Jo7coVUDmook6ddyE= 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=iI26+rA0; arc=none smtp.client-ip=209.85.167.171 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="iI26+rA0" Received: by mail-oi1-f171.google.com with SMTP id 5614622812f47-3db16a98d16so6095967b6e.0; Sun, 04 Aug 2024 00:58:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1722758332; x=1723363132; 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=Iy8s8HUuCpYYzqYVYDLibKnXKIG+UtFNyRBbbBdMpkI=; b=iI26+rA0qydphvU0P9ejVFsR5kMhFcI3uOZOZvkFR4q+JJ4sPswTpclVcozMUyjX/i uD86nydoKaHZ7QR8mMlG+avhItXhV4Wg4Kqo0I3KVXU7uTCaPj9Tndj6l7SCBHoPBHe0 pU3pYO/Qmp3nV150sdQxZDLQJ5rhTCFoz5jMGy8LTM0w2wIKxjFkhZupGOj7QH03hurd h0Hp6+tMPciIGT6OtvstcVebooKkKqgCwePS1P7B0WxwwT6hGDQapKqld8bENuMzZApk HJH4e5lyLvys9E2DC/N7ufGT53MDu4ryQNHQ/0/cMQtXcNOm21nMY/qFsm0kFxX2Lk/u kIzQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1722758332; x=1723363132; 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=Iy8s8HUuCpYYzqYVYDLibKnXKIG+UtFNyRBbbBdMpkI=; b=UHwsmZLiOmXdVgx0+K8m8PFfrdfQ9Hb8I4NHMi/MzDaKuJisO2w+z79CoWdtEamZl8 NNpQg4o7z9f1d5lZOZn6Gio9BlWKgcXNhX0ubdty/HvGJ4GMjRzfSFG9IKYwlWQrAqv8 az+BEA+1UHANYbVny6Rk/f4hSVl8cgguNmZ0jl+VFnWbLWKuH4gjp9Wieem958UZl2wI IB0Qo0HRkSIlr6Mn/LJz+GlBHmFo6WnmldZVsOkp6GxF5b6VTwp5c9X1ltnwJkL8AdJQ DeYGh/1jCvoA6BXmxXF+9U1BHyebPhbNgyLQ5X4llDLHOe1AVYYGyUbOseevFqz8yQFc oEJg== X-Forwarded-Encrypted: i=1; AJvYcCXi5idbceo2lWj/Q64keBSV8nqsY7y/HFmpkY5Wie1suXqSSUpITjfFn5xN4NRwK/3OiMvkBJ78EDdMZTYGdtJHL2Gnz/C4oCI3ECNM7ehii9/RzZMGnofxjvygERFWFZGachu2RtFIFPKTF1zz3D4EHTLzTb83CsdZoDgEWQ7IoJM8+r96WEIv2O5FcOeTTl0RVJFpRG48rsS50kDJeRn7m4fzQW9LsQp1XrHntRcnbaSgz0ZlcRqxF9fDwcQtEX2p8g8gqVT8dtYcqaIvBLgPE5/QCjcNtdTHVGSYB32ANP0PehQouDBgxBVi/7dy1YRT9MUvSA== X-Gm-Message-State: AOJu0YwHxWbxQKdFpQY8hxFZkwDQ5uTUzsGsBV6nHZ17rZRqmgysEskg aVwYjzEEf5wuT/NNmECN7MLn+Ms7yTdtX5JFLPKYXl5U+V5OYTaP X-Google-Smtp-Source: AGHT+IEAdxuBVNyLOuAyS4g3ON7ORD29wxk4r6CpWYYml3q2XeTU12w4OJdy/NnFgIlYXJGGtsOOlw== X-Received: by 2002:a05:6808:1984:b0:3d9:9e78:420c with SMTP id 5614622812f47-3db5583270amr9335216b6e.38.1722758332352; Sun, 04 Aug 2024 00:58:52 -0700 (PDT) Received: from localhost.localdomain ([39.144.105.172]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-1ff59178248sm46387605ad.202.2024.08.04.00.58.37 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Sun, 04 Aug 2024 00:58:51 -0700 (PDT) From: Yafang Shao To: akpm@linux-foundation.org Cc: torvalds@linux-foundation.org, 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 v5 8/9] net: Replace strcpy() with __get_task_comm() Date: Sun, 4 Aug 2024 15:56:18 +0800 Message-Id: <20240804075619.20804-9-laoar.shao@gmail.com> X-Mailer: git-send-email 2.30.1 (Apple Git-130) In-Reply-To: <20240804075619.20804-1-laoar.shao@gmail.com> References: <20240804075619.20804-1-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 __get_task_comm() 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 --- 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 70a0b2ad6bd7..fa3a91e36ba0 100644 --- a/net/ipv6/ndisc.c +++ b/net/ipv6/ndisc.c @@ -1942,7 +1942,7 @@ 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); + __get_task_comm(warncomm, TASK_COMM_LEN, current); 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,