From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-yx1-f50.google.com (mail-yx1-f50.google.com [74.125.224.50]) (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 6AC3D2C3255 for ; Fri, 28 Aug 2026 13:02:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.224.50 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787922136; cv=none; b=KGIG8o3K4rnpr5mT8s83pHL3JuWkm/VgfHWfOH3xFtlqAEnYXasHjXHyFepaDy1UyyG+eE5mJ2aXs4Wdr7vsoBjTyWOPcbOh2Wr8JsKRvG2mR5q4Bj5dmN/aPEkHKg+e9RDC9U4PVBz3OgNl/kjMspVCAkGyx+/4AQMJw8qaD/Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787922136; c=relaxed/simple; bh=QqzBBu7p8nODo/RmFJm1kAQ41J+L+8YvaBuNF7HBWYk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Z0CEHacp5ZOLiw0Dq37ccDMSnmY17383OAh5Kn6hUgi2xmyMWCwd9yAvuofqLhG1ML1pzZxdJJvbON+szgJG2R3qjt3EEPgf0bRYrsuZ6osyM/NnoMxPrTGA/RrC1cWtP3js2kzhdJWHx23P1/qbffYEkHDHeWPj2IzfO2At2ds= 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=MKsP1TlU; arc=none smtp.client-ip=74.125.224.50 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="MKsP1TlU" Received: by mail-yx1-f50.google.com with SMTP id 956f58d0204a3-66d2b3092c1so1605582d50.3 for ; Fri, 28 Aug 2026 06:02:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1787922134; x=1788526934; 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:content-type; bh=QqzBBu7p8nODo/RmFJm1kAQ41J+L+8YvaBuNF7HBWYk=; b=MKsP1TlUYUeUNOdu8V1C9pJvBi81lkXLkE4S1OivElINshuP9DPCx7gJEDVul60aHQ O6B8RkCPTl/CJXugP8mwR1OJ1p9m7ehYskD57AhN2ZDz4e3nRDERritZPgjVEu15LVRy nBSSaGRzdLC6jxTKqV4u0vJrtDSn3xph1F3hUgPdoFYxF7vkLRnykoDYMNBik2gI0Hdo lf2KGngS4ZsxTN9ChjAxBffVjb+DNyb+QTNJN9V28T1YjgIyqb3CULf4ziTeNelTNhBK xFeJxN+/grPnN1+fjaQDj8OD7TNyOnM0mfJ4naf1cgSoxicUCvnF8EEiZIsnEijpR/0v RPfw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1787922134; x=1788526934; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to:content-type; bh=QqzBBu7p8nODo/RmFJm1kAQ41J+L+8YvaBuNF7HBWYk=; b=IJX1b8GFBm7emlhJ70FWE/Q7o0VM9rg1rK9LoUc5FsBPtMwNIg/oYypPEw1NNA+Ub+ FtAiGIPQaW7i1CekKYtpwzp6Z0M66ehybpmJKbEhZ7/FNmqPY2PxcY8WLkifuWDJz75C tbwqGXliAXnU3E6kH3Sdjdn2/FjmDTpXP6KdBekoahOyLUoo6KdjAWl1jTOdnp4NZAnv H0PTd7XLdpt9FsiI2/8WCaCtKqocvrdliICSVjbnCywRwvtrrjFgjq+tTIh7dg0Ed3DK N2/Yh6dLsSWoWRptDNWcCeasohHBjqF8Mo/19lfyQsj7dAj0+zr6kQJD5HXUop3CfMlR RNmQ== X-Forwarded-Encrypted: i=1; AKwUvBxchRCUhLzrA8C/onEEyXRrPjMwyqFdjIqueqjSTkMreTZvqCrdtJegPENPrzkow+ZmIcQ8dNc=@vger.kernel.org X-Gm-Message-State: AFuF++mbsFmUiaGVfto92R0SHacpNOU6Hk8zXpp+BSJS3OX5tHp9NqGY jolJapMILlPed5x/TF45kwfcWlRkc8zXZXrKQu2cMMayxFNFVcLbHquF X-Gm-Gg: AYBFou26mACsO/WKXuEPosOIb/1kX+zoNRdPAPFCsdZAdkqwe3OZ3iYhWw9jImiAcqo oxGTdnHBvAGvVRV7YOgjmU2MtA60IaU4igNJ6qdvu/dNE2JigQzRuJSIKCpiSvDWyv8NGGBEkP3 iYfaNfy5w/pjuLM7RKMY/gzjOBx5EUUAfQJc0N+uwnH7S33tabMuJI3UBoMPBPOBjduMi7k7Q+E Vr3QNZvpYttHGL0T5GCIxNsHtIEhszP9DX30UgJbBN4+6wVBElvAP6AZof2DcMCxyc0nz8Wi1fy dm4JDDF87qyy7Yi97mlvtI5k99avXuuSFBY2IS3ryOD5Q2dYQ1D8Vyn2LbxZR0+xRUcqDtMcyX7 9jMRS/yNpzQoYFP/BlSjyPhDNntgcIB8bsEnvsRlMYbRBNSupGVx2ql4ulcGmwM/RQhj9u9K5uq Cp1KNA80GaH4lFY9xSA1m7MZysZVgT0wHV5nFApBFwuUfQnzj04QQuoKVh0D0PvfeWhpQM8pkOh loMfA== X-Received: by 2002:a53:c550:0:b0:66d:264e:88f2 with SMTP id 956f58d0204a3-66e4c6eb8f4mr1512029d50.16.1787922134170; Fri, 28 Aug 2026 06:02:14 -0700 (PDT) Received: from mac.lan ([136.55.173.105]) by smtp.gmail.com with ESMTPSA id 956f58d0204a3-66e4ed39d4csm770568d50.21.2026.08.28.06.02.13 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Fri, 28 Aug 2026 06:02:13 -0700 (PDT) From: "Cen Zhang (Microsoft)" To: leitao@debian.org Cc: AutonomousCodeSecurity@microsoft.com, andriin@fb.com, ast@kernel.org, blbllhy@gmail.com, bpf@vger.kernel.org, davem@davemloft.net, edumazet@google.com, geliang@kernel.org, horms@kernel.org, kafai@fb.com, kuba@kernel.org, kuniyu@google.com, kys@microsoft.com, linux-kernel@vger.kernel.org, martineau@kernel.org, matttbe@kernel.org, mptcp@lists.linux.dev, ncardwell@google.com, netdev@vger.kernel.org, pabeni@redhat.com, stable@vger.kernel.org, tgopinath@linux.microsoft.com, xmei5@asu.edu, yhs@fb.com Subject: Re: [PATCH net v3 1/2] tcp: fix use-after-free in do_tcp_getsockopt(TCP_CONGESTION) Date: Fri, 28 Aug 2026 09:02:12 -0400 Message-ID: <20260828130212.32968-1-blbllhy@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit > nit: Do you need to zero this string? It will be safely overwritten > below, no? Thanks for catching this. That initialization is unnecessary. Would you prefer a new version for this, or are you okay with keeping it as-is? I may need a few days before I can send a new version due to an ongoing email account approval process. Cen