From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 DDB353382C5; Fri, 7 Aug 2026 14:52:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786114344; cv=none; b=dtq2YICW02IPSVUWhGIi+WNVj08Jh2mElE15Xs3NpuH45TYJiL8nGUJdQMuNRAWUeU2c4O7eu49Q7unfwmN7+mMFYxZdCWV+MQuHAd0q/7JcV0Hgg7VZgdBTZxBDeB0nsw016pgWQR12tVyAZF79DshAegqev+HMeSTVrinIbCI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786114344; c=relaxed/simple; bh=n9RKF9LO/OFHjb+f3Gj3wnD+8zxqTC/rlpZhikQ9PBo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=pDqtTyaJRh9O3tVyDBiCKruoh9LPMAtVbbVvTI2lQJGTF8NadxDx1jNDwKrMYFovy766fjMHJGh7oGXKYSd4Nb0/wArM8BSlzAQtlN3vMRTR42T7bi+CgerTuCG9as81+DVV5s5YQstO7eknuaFJjvczcmO48CCbvxEYElwUvAI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=o/rn3ePY; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="o/rn3ePY" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 36B901F000E9; Fri, 7 Aug 2026 14:52:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1786114342; bh=tSjfR1015LWPRlZ8OYmLySdh/pQvL2HrPBB2Sw6owv8=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=o/rn3ePYsEVza0x1533/8jDLsl5AXgYAE7myhSmTWQwAeHCu6YxxKFWe9a7p8kPNP Ro3iWds2IyYDGsqfhL/NhBMGGKzfgUHh/saqia9IQqdo5DgsGLa2aDCgjB4fZE3Yfn 4o/yh+kmNlI5uKVwoRYQFzfYaAc1USevcDhfA82c= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jian Zhou , Oleksij Rempel , stable@kernel.org, Marc Kleine-Budde Subject: [PATCH 6.12 231/337] can: j1939: transport: j1939_session_fresh_new(): initialize receive buffer Date: Fri, 7 Aug 2026 16:37:14 +0200 Message-ID: <20260807143423.560743932@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260807143418.516897842@linuxfoundation.org> References: <20260807143418.516897842@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Oleksij Rempel commit eb96c58907922546e415e545fe9a14ea63b02719 upstream. Zero the allocated buffer in j1939_session_fresh_new() to ensure it contains no residual data. While there is a potential performance impact if users allocate maximum sized ETP buffers, most real-world use cases are not noticeably affected since the maximum known buffer size is typically around 65K. Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol") Reported-by: Ji'an Zhou Message-ID: Signed-off-by: Oleksij Rempel Link: https://patch.msgid.link/20260728055835.1151785-3-o.rempel@pengutronix.de Cc: stable@kernel.org [mkl: add Message-ID] Signed-off-by: Marc Kleine-Budde Signed-off-by: Greg Kroah-Hartman --- net/can/j1939/transport.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/net/can/j1939/transport.c +++ b/net/can/j1939/transport.c @@ -1562,7 +1562,7 @@ j1939_session *j1939_session_fresh_new(s } /* alloc data area */ - skb_put(skb, size); + skb_put_zero(skb, size); /* skb is recounted in j1939_session_new() */ return session; }