From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.kernel.org ([198.145.29.99]:36538 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388493AbgAPRGZ (ORCPT ); Thu, 16 Jan 2020 12:06:25 -0500 From: Sasha Levin Subject: [PATCH AUTOSEL 4.19 314/671] s390/kexec_file: Fix potential segment overlap in ELF loader Date: Thu, 16 Jan 2020 11:59:12 -0500 Message-Id: <20200116170509.12787-51-sashal@kernel.org> In-Reply-To: <20200116170509.12787-1-sashal@kernel.org> References: <20200116170509.12787-1-sashal@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-s390-owner@vger.kernel.org List-ID: To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Philipp Rudo , Martin Schwidefsky , Sasha Levin , linux-s390@vger.kernel.org From: Philipp Rudo [ Upstream commit 6339a3889ad4d0dd930ed7a1e873fb81d3e690f7 ] When loading an ELF image via kexec_file the segment alignment is ignored in the calculation for the load address of the next segment. When there are multiple segments this can lead to segment overlap and thus load failure. Signed-off-by: Philipp Rudo Fixes: 8be018827154 ("s390/kexec_file: Add ELF loader") Signed-off-by: Martin Schwidefsky Signed-off-by: Sasha Levin --- arch/s390/kernel/kexec_elf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/s390/kernel/kexec_elf.c b/arch/s390/kernel/kexec_elf.c index 602e7cc26d11..5cf340b778f1 100644 --- a/arch/s390/kernel/kexec_elf.c +++ b/arch/s390/kernel/kexec_elf.c @@ -58,7 +58,7 @@ static int kexec_file_add_elf_kernel(struct kimage *image, if (ret) return ret; - data->memsz += buf.memsz; + data->memsz = ALIGN(data->memsz, phdr->p_align) + buf.memsz; } return 0; -- 2.20.1