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 87A67435EF2; Fri, 7 Aug 2026 15:46:15 +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=1786117576; cv=none; b=JrOY8LjFvAEwqMiwrrdKCqt7BXzOg7p4UZPMzWvHHfX98e7CGyDZiHY0aUnzI/swvQRjLVI1Y4YPuGGl06bzM1xFsYI8Szadx9FvJkuLSO7ZJqUSE1N3ouPU3z6FrtYeBEoivOtBifAAkMH5n638roEMKJCoiYYFl1dc/XEkggo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786117576; c=relaxed/simple; bh=7cIyf1E100I3tJ8E+i7yBeTJ8Jt4o9wIwzRRG1ZnGyE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=mizQE50XWJAI771IYJhtrObKInJVKZPvrere1/m/y9NZVozkS4lDz6ipvZr7IZq1nL+9VurrmoqeuBFpfISqZIKlzu/uUVVDaY9JUhyCALj1TeBd0nnNL+ZBtsW2WVSUP+69+dqVLP5TFTf7VrWArVp/lMZxMnw49BRdJr1GDus= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=eNZNfBKl; 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="eNZNfBKl" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DF2691F000E9; Fri, 7 Aug 2026 15:46:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1786117575; bh=E6LysXXwEQzLeXepP+WQendm7hvYrKdELxO1b/8jryg=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=eNZNfBKlvS4evdbz4i0qv+qcsYXIrOAPAH1qXSX+OtMwJ+mjU1skRCrX1ma+ybAcN mnBp6IYYD0oXDtRxaenrxMls5w5xUbUGU+1JUwXGJ0PDcEsy8fGGwmEeLuiMWKvWvO wtn6gPmk1SjVd+dJqvtdP0y4xutLBsa5u32zSS+0= 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 7.1 368/438] can: j1939: transport: j1939_session_fresh_new(): initialize receive buffer Date: Fri, 7 Aug 2026 16:39:24 +0200 Message-ID: <20260807143435.817503058@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260807143428.008222056@linuxfoundation.org> References: <20260807143428.008222056@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 7.1-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 @@ -1579,7 +1579,7 @@ 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; }