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 D596D23A9BE; Mon, 23 Jun 2025 13:22:37 +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=1750684957; cv=none; b=VQzNY6To8+wCij6ZhZxQ5xO0N+E9KGQPQ6D57+AGmNNJYx+QK6u8rcM9KFJdf+tvZIiaMhG/LwzjOZUrz9XFGk7+s5j0M8mHOiI8Fl72KflI/Ep+WJBBfXkzN6FHpxhDGRnKGwP5lhfCSALGvwoYc6TGRXZ3J8oYSD0mOmxmGmE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750684957; c=relaxed/simple; bh=arV5++ewlBMfbhOGToIvyeyx/QMojJD0/4+XAghDIq0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=UxxJ0/WmZgWcqpZXmfp/1flXPLw+lC48nuPtewk+3uZbIOxjWM/G5i3j2eu2yehdL5vXJc0sUCH/YkOyOYJBZzthWbbRuMSkpS93Vmpm9ydI1lnCl0rhmZMyFfMhyrs2GVGf3aANRr2Q7UutXlhpq6etdxWGqzs+7gxRONcpWBY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=hELL3Lcf; 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="hELL3Lcf" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6AD56C4CEEA; Mon, 23 Jun 2025 13:22:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1750684957; bh=arV5++ewlBMfbhOGToIvyeyx/QMojJD0/4+XAghDIq0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hELL3LcfOBIT+ax74PRS/beDAObYJAsGaDJvdGvY/HFE9/s9oYXyBvWpQJZsXPdyJ pMIcT3bxoWkT87ugTCcy2GzTP7Be+rVDi7EmaJ1xm7gSA4+1VMxQrkkPI+E7XoLOQT lH1KBQoNYGH0T/1/4bg2+XTABpzP5lOw9+zT0Fss= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Henry Martin , Andrew Jeffery , Arnd Bergmann , Sasha Levin Subject: [PATCH 5.4 051/222] soc: aspeed: Add NULL check in aspeed_lpc_enable_snoop() Date: Mon, 23 Jun 2025 15:06:26 +0200 Message-ID: <20250623130613.626717085@linuxfoundation.org> X-Mailer: git-send-email 2.50.0 In-Reply-To: <20250623130611.896514667@linuxfoundation.org> References: <20250623130611.896514667@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Henry Martin [ Upstream commit f1706e0e1a74b095cbc60375b9b1e6205f5f4c98 ] devm_kasprintf() returns NULL when memory allocation fails. Currently, aspeed_lpc_enable_snoop() does not check for this case, which results in a NULL pointer dereference. Add NULL check after devm_kasprintf() to prevent this issue. Fixes: 3772e5da4454 ("drivers/misc: Aspeed LPC snoop output using misc chardev") Signed-off-by: Henry Martin Link: https://patch.msgid.link/20250401074647.21300-1-bsdhenrymartin@gmail.com [arj: Fix Fixes: tag to use subject from 3772e5da4454] Signed-off-by: Andrew Jeffery Signed-off-by: Arnd Bergmann Signed-off-by: Sasha Levin --- drivers/soc/aspeed/aspeed-lpc-snoop.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) diff --git a/drivers/soc/aspeed/aspeed-lpc-snoop.c b/drivers/soc/aspeed/aspeed-lpc-snoop.c index 8a2a22c40ef53..43e30937fc9da 100644 --- a/drivers/soc/aspeed/aspeed-lpc-snoop.c +++ b/drivers/soc/aspeed/aspeed-lpc-snoop.c @@ -202,11 +202,15 @@ static int aspeed_lpc_enable_snoop(struct aspeed_lpc_snoop *lpc_snoop, lpc_snoop->chan[channel].miscdev.minor = MISC_DYNAMIC_MINOR; lpc_snoop->chan[channel].miscdev.name = devm_kasprintf(dev, GFP_KERNEL, "%s%d", DEVICE_NAME, channel); + if (!lpc_snoop->chan[channel].miscdev.name) { + rc = -ENOMEM; + goto err_free_fifo; + } lpc_snoop->chan[channel].miscdev.fops = &snoop_fops; lpc_snoop->chan[channel].miscdev.parent = dev; rc = misc_register(&lpc_snoop->chan[channel].miscdev); if (rc) - return rc; + goto err_free_fifo; /* Enable LPC snoop channel at requested port */ switch (channel) { @@ -223,7 +227,8 @@ static int aspeed_lpc_enable_snoop(struct aspeed_lpc_snoop *lpc_snoop, hicrb_en = HICRB_ENSNP1D; break; default: - return -EINVAL; + rc = -EINVAL; + goto err_misc_deregister; } regmap_update_bits(lpc_snoop->regmap, HICR5, hicr5_en, hicr5_en); @@ -233,6 +238,12 @@ static int aspeed_lpc_enable_snoop(struct aspeed_lpc_snoop *lpc_snoop, regmap_update_bits(lpc_snoop->regmap, HICRB, hicrb_en, hicrb_en); + return 0; + +err_misc_deregister: + misc_deregister(&lpc_snoop->chan[channel].miscdev); +err_free_fifo: + kfifo_free(&lpc_snoop->chan[channel].fifo); return rc; } -- 2.39.5