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 B6D2518EB7; Fri, 5 Jan 2024 14:43:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="r7phsm4i" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3BEB3C433C7; Fri, 5 Jan 2024 14:43:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1704465831; bh=/PYoXlV3AGwHYpbw7aM3SSRhbm8GUtZZ23gKYP0AH+c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=r7phsm4i6dY7q0qHKMyBJUtAFXA5wAdkjjpBEKKevATjVXiZniTHl4kBcwWESIy16 Hsl156szk+HshrvRbcWs59I1IlwGC2i2FmQb4bVB8oqJJ8lfaplxmvHOUuEjWla5rH rnxj0rQMTMCtFQ8Pc6AgAbgAwBTNHQKirbVahSm8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Kunwu Chan , Tony Lindgren , Sasha Levin Subject: [PATCH 5.4 03/47] ARM: OMAP2+: Fix null pointer dereference and memory leak in omap_soc_device_init Date: Fri, 5 Jan 2024 15:38:50 +0100 Message-ID: <20240105143815.665190329@linuxfoundation.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240105143815.541462991@linuxfoundation.org> References: <20240105143815.541462991@linuxfoundation.org> User-Agent: quilt/0.67 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 5.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Kunwu Chan [ Upstream commit c72b9c33ef9695ad7ce7a6eb39a9df8a01b70796 ] kasprintf() returns a pointer to dynamically allocated memory which can be NULL upon failure. When 'soc_dev_attr->family' is NULL,it'll trigger the null pointer dereference issue, such as in 'soc_info_show'. And when 'soc_device_register' fails, it's necessary to release 'soc_dev_attr->family' to avoid memory leaks. Fixes: 6770b2114325 ("ARM: OMAP2+: Export SoC information to userspace") Signed-off-by: Kunwu Chan Message-ID: <20231123145237.609442-1-chentao@kylinos.cn> Signed-off-by: Tony Lindgren Signed-off-by: Sasha Levin --- arch/arm/mach-omap2/id.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/arm/mach-omap2/id.c b/arch/arm/mach-omap2/id.c index 188ea5258c999..8c9160779689d 100644 --- a/arch/arm/mach-omap2/id.c +++ b/arch/arm/mach-omap2/id.c @@ -797,10 +797,15 @@ void __init omap_soc_device_init(void) soc_dev_attr->machine = soc_name; soc_dev_attr->family = omap_get_family(); + if (!soc_dev_attr->family) { + kfree(soc_dev_attr); + return; + } soc_dev_attr->revision = soc_rev; soc_dev = soc_device_register(soc_dev_attr); if (IS_ERR(soc_dev)) { + kfree(soc_dev_attr->family); kfree(soc_dev_attr); return; } -- 2.43.0