From nobody Fri Oct 2 03:37:47 2026 Received: from m16.mail.163.com (m16.mail.163.com [117.135.210.2]) (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 36E8B2E7380; Thu, 6 Aug 2026 01:10:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=117.135.210.2 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785978641; cv=none; b=obUr3bVhgZeii1AZFnwUTcAhXx2P4+hsMiPNp//CHCvlGs5+GP0Hh3FXOddVdJnPYD1BZ2211jolhHsAUayJNKBUAJfP78O7KIdGZ5flE+sO23OExMfQdGa4zG81uWn7dtndFWRlitiuJrmRjL3jR8dRWp4OhmgdUcaLfyo0P+M= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785978641; c=relaxed/simple; bh=iO0/RNGDsoBrusjjqMEfjS2xD1Gh/6lSjGGh2TJJlbU=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=EK9j7mVema+bCWuREUQmlrT3rZgt81bwSeVSkqerUnViWToZIox86OsvFYxOh7wLVg/femVDquA05uhGkaVdFRzpU7Hlz9k5S40bLSWCQMniGZC0HmMYLAM2GVgXeMbwqbJkXBuibfd5FoXA/uP22bhHqwT5FTSGh0WLMnWPn5s= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com; spf=pass smtp.mailfrom=163.com; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b=XScSEJ66; arc=none smtp.client-ip=117.135.210.2 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=163.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="XScSEJ66" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=G0 ow5W0uSGuZWxs9MYWa46XNBysZkCZarO77EvWlPdA=; b=XScSEJ66OtIhRnF0Xg 11SMKZthS3A1yFxeDQPtCgWAhtZ4wVkgRBuwoNMjkswQY5hDMkr8KKHozMU//QMW ozuYv1lKYhNm2hSHSlHq/LGzaSk4HkUsfc+/9D2fdS6XClvaK0IqdNFtJfF1YUL3 1lZ45cscx9sOXivqJ0G8Pgp8w= Received: from localhost.localdomain (unknown []) by gzga-smtp-mtada-g1-3 (Coremail) with SMTP id _____wAXW6va3nNqLxe2MA--.82S2; Thu, 06 Aug 2026 09:09:49 +0800 (CST) From: kensanya@163.com To: "Rafael J . Wysocki" Cc: Tony Luck , Borislav Petkov , Hanjun Guo , Mauro Carvalho Chehab , Shuai Xue , Len Brown , linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, TanZheng , stable@vger.kernel.org Subject: [PATCH v2] ACPI: APEI: GHES: fix ARM section length accounting after header Date: Thu, 6 Aug 2026 09:09:44 +0800 Message-Id: <20260806010944.32384-1-kensanya@163.com> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: _____wAXW6va3nNqLxe2MA--.82S2 X-Coremail-Antispam: 1Uf129KBjvJXoW7AF47Gr43ZF1UKr45JF1DZFb_yoW8GrWxpF Waka4jkrs8GF45Kw1xGF42va45Awn2kay2k3sIy345uF1rCF1YqFnFgr9Iga4DGFy8ua1S qa9FyryjvFWDuF7anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x07jnb18UUUUU= X-CM-SenderInfo: 5nhq2txq1dqiywtou0bp/xtbCwR1mQmpz3t0xWgAA3J Content-Type: text/plain; charset="utf-8" From: TanZheng In ghes_handle_arm_hw_error(), after skipping the cper_sec_proc_arm header with (err + 1), the remaining length was reduced by sizeof(err) (pointer size) instead of sizeof(*err) (structure size). That overestimates the bytes left for cper_arm_err_info records and can let the parser read past the CPER section when err_info_num is large enough relative to error_data_length. Use sizeof(*err) so the length accounting matches the pointer advance and the earlier sizeof(*err) size check. Fixes: 87880af2d24e ("APEI/GHES: ARM processor Error: don't go past allocat= ed memory") Cc: stable@vger.kernel.org Signed-off-by: TanZheng Reviewed-by: Shuai Xue --- v2: - add Cc: stable@vger.kernel.org drivers/acpi/apei/ghes.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c index 3236a3ce79d6..e6362da72d15 100644 --- a/drivers/acpi/apei/ghes.c +++ b/drivers/acpi/apei/ghes.c @@ -576,7 +576,7 @@ static bool ghes_handle_arm_hw_error(struct acpi_hest_g= eneric_data *gdata, return false; =20 p =3D (char *)(err + 1); - length -=3D sizeof(err); + length -=3D sizeof(*err); =20 for (i =3D 0; i < err->err_info_num; i++) { struct cper_arm_err_info *err_info; --=20 2.25.1