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 155D7443A8E; Tue, 21 Jul 2026 22:24:00 +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=1784672641; cv=none; b=Rfu6wneUYHg4/kK49tBrsBgR+Zfu7EdsQ5Da70V41CtAlbBetNH8TqhuEoi/T3HI0P7jFqR8/233w6MUT+2c3yIPQL4wQjlSqH5Iapa40sdKfMWm/8G8xQ0gCS3/HnPjsnYaOAXyxBdzEQaCiJGhiWyof9M6ySmXUxK0/nyRQlc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784672641; c=relaxed/simple; bh=TFtmXJ+HsyI6JIonV/wAk5ltZnHhU8xa2ZA7fKZaaKk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=D+BOhyIQ4JZzX7O2YSqYKeMvI7A+IbacSzGjpFPZqX+4pZtDRF8TG2YWokG5XmpDWH6nic6+KQpRFrIZ+d3Xp5J3xZJ3VRn8pLnAa24XiBK0SH2I81U1tJjrRDkRLQ0jo3M+vW13bEV4F+5jrlf416KGoKABzPYdMQ4Ag6BBPkA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=sTFwf+TF; 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="sTFwf+TF" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 753E61F000E9; Tue, 21 Jul 2026 22:23:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784672640; bh=ogtj0Oq+3M1PZZntr2IiIhQzrRe5AKMMBDBk5HcmS1o=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=sTFwf+TFJ1MwiHMOIj5tRXihzzcldaZ2hkRl2uFS87h2GBOMeTxZfrvyGyohcFFZc O0bibKx/yOP7Pzv8awY6RgdCBQZ7qHPx0BWXOhPB0GYDf31ItPK7HQO61/daELPJWn h0C0zqJdIhNH7e05vcnLX6TXTzNCczdD+rqpxg64= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, HyeongJun An , Guenter Roeck Subject: [PATCH 5.15 701/843] hwmon: (asus_atk0110) Check package count before accessing element Date: Tue, 21 Jul 2026 17:25:36 +0200 Message-ID: <20260721152421.818775647@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260721152405.946368001@linuxfoundation.org> References: <20260721152405.946368001@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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: HyeongJun An commit e2735b39f044bad7bf2017aef248935525bc0b97 upstream. atk_ec_present() walks the management group package returned by the GGRP ACPI method and, for each sub-package, reads its first element: id = &obj->package.elements[0]; if (id->type != ACPI_TYPE_INTEGER) without checking that the sub-package is non-empty. ACPICA allocates the element array with exactly package.count entries, so for a sub-package with a zero count this reads past the allocation. The sibling function atk_debugfs_ggrp_open() performs the same access but skips empty packages with a package.count check first. Add the same check to atk_ec_present() so a malformed firmware package cannot trigger an out-of-bounds read. Fixes: 9e6eba610c2e ("hwmon: (asus_atk0110) Enable the EC") Cc: stable@vger.kernel.org Assisted-by: Claude:claude-opus-4-8 Signed-off-by: HyeongJun An Link: https://lore.kernel.org/r/20260619122746.721981-1-sammiee5311@gmail.com Signed-off-by: Guenter Roeck Signed-off-by: Greg Kroah-Hartman --- drivers/hwmon/asus_atk0110.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/hwmon/asus_atk0110.c +++ b/drivers/hwmon/asus_atk0110.c @@ -1037,6 +1037,9 @@ static int atk_ec_present(struct atk_dat if (obj->type != ACPI_TYPE_PACKAGE) continue; + if (!obj->package.count) + continue; + id = &obj->package.elements[0]; if (id->type != ACPI_TYPE_INTEGER) continue;