From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 F091C1F1538; Tue, 26 Aug 2025 12:55:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756212954; cv=none; b=JV72frEmEUFMjZRQX3fpyCetp1tKPyong9Bn0Xe8Nrgq7mWKYjQ2qtBDTsKRERXG8MH2k9jJlyM/rsfdCbWmlDQPPXHMnqD5YDMp4lHwTzOi2aTXpFnBCUKJenSRGBKBUolqEBaNBGGPE3i5or5Z8x7QFwofd9OUhgekNaBoZAo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756212954; c=relaxed/simple; bh=XVh05h5ECCrzW8YhMPt9MRY/GCynD+MEtckNA4DDCoI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Tz0mqWYHNTZvf0QmtGsfV5n8tbF0W3OAshWQTiYC5bnOahqqF8zo9qf0CNF2wU6Tyl0k/vege3jwz4OkYtYwN/32XImf8XFK0pfLSsW/IRC9cOJuqxDdAxyDz71Vo6pkax6Ap8tmDhQnQLoSsfmJ/jAg9An2S3e+fEwOCnTokQs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=seid9e9a; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="seid9e9a" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7DAB8C4CEF1; Tue, 26 Aug 2025 12:55:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1756212953; bh=XVh05h5ECCrzW8YhMPt9MRY/GCynD+MEtckNA4DDCoI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=seid9e9aAnUfTB4BJHQIry+dExNRxTdUP7QCxrx7DWDJxVas3thJk07u0Bj1HyCz7 kbd4aFlqmb7+jtnkECvjwIEn7O8RMcO+b6eWFmyokknqOlt44byH46NfDosKmAkDUV RKmvKt4+r4wNUUF6qj7yxYxu/EmkxzWVNTxNDrEs= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Thomas Fourier , Christophe Leroy , Madhavan Srinivasan , Sasha Levin Subject: [PATCH 6.6 166/587] (powerpc/512) Fix possible `dma_unmap_single()` on uninitialized pointer Date: Tue, 26 Aug 2025 13:05:15 +0200 Message-ID: <20250826110957.168319013@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250826110952.942403671@linuxfoundation.org> References: <20250826110952.942403671@linuxfoundation.org> User-Agent: quilt/0.68 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 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Thomas Fourier [ Upstream commit 760b9b4f6de9a33ca56a05f950cabe82138d25bd ] If the device configuration fails (if `dma_dev->device_config()`), `sg_dma_address(&sg)` is not initialized and the jump to `err_dma_prep` leads to calling `dma_unmap_single()` on `sg_dma_address(&sg)`. Signed-off-by: Thomas Fourier Reviewed-by: Christophe Leroy Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/20250610142918.169540-2-fourier.thomas@gmail.com Signed-off-by: Sasha Levin --- arch/powerpc/platforms/512x/mpc512x_lpbfifo.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/arch/powerpc/platforms/512x/mpc512x_lpbfifo.c b/arch/powerpc/platforms/512x/mpc512x_lpbfifo.c index 4a25b6b48615..f1e353fc6594 100644 --- a/arch/powerpc/platforms/512x/mpc512x_lpbfifo.c +++ b/arch/powerpc/platforms/512x/mpc512x_lpbfifo.c @@ -240,10 +240,8 @@ static int mpc512x_lpbfifo_kick(void) dma_conf.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; /* Make DMA channel work with LPB FIFO data register */ - if (dma_dev->device_config(lpbfifo.chan, &dma_conf)) { - ret = -EINVAL; - goto err_dma_prep; - } + if (dma_dev->device_config(lpbfifo.chan, &dma_conf)) + return -EINVAL; sg_init_table(&sg, 1); -- 2.39.5