From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 56C68C433F5 for ; Thu, 21 Oct 2021 00:21:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 421536135F for ; Thu, 21 Oct 2021 00:21:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231540AbhJUAX2 (ORCPT ); Wed, 20 Oct 2021 20:23:28 -0400 Received: from mail.kernel.org ([198.145.29.99]:42204 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231531AbhJUAXN (ORCPT ); Wed, 20 Oct 2021 20:23:13 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 2453C6128E; Thu, 21 Oct 2021 00:20:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1634775658; bh=iZsZt9Wfa6f0L6Q0b7KVcdTKMTJAy+npREB4ivJqzbU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JBQCK6gDL+skR08SwvheHnyzUKahM/d0fks38d2gcmPBgIiqzHkiiNS+yTyE7TTtW EBDxjwESUGScMlWdo7hqsCK6P9MBHv1w7lOfBSmOsEJcGWXjxrr5Oo1R/pgHDUe1ds 8Hpkbliiz9SB8vwpvGEO5v7W4C+oFiNQnojDaXy1GA5EnkMpHecsYKeOCsuvzBcfq2 1fsG7PXMJ0/7iGtPt/4hBhS/jEggYNYxE0bW4fUZyYhqkI+j40bUEZBFDckgYAXZMM KxSdcZ5L7TxRs3mkwZjgiWfk8IpPWVRQiXr1CImVPaQTMyHTaUHvTW61eFnMG/7skK p+WEKXFEQlM+A== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Michael Forney , Miroslav Benes , Josh Poimboeuf , Sasha Levin , peterz@infradead.org Subject: [PATCH AUTOSEL 5.14 08/26] objtool: Check for gelf_update_rel[a] failures Date: Wed, 20 Oct 2021 20:20:05 -0400 Message-Id: <20211021002023.1128949-8-sashal@kernel.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211021002023.1128949-1-sashal@kernel.org> References: <20211021002023.1128949-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Michael Forney [ Upstream commit b46179d6bb3182c020f2bf9bb4df6ba5463b0495 ] Otherwise, if these fail we end up with garbage data in the .rela.orc_unwind_ip section, leading to errors like ld: fs/squashfs/namei.o: bad reloc symbol index (0x7f16 >= 0x12) for offset 0x7f16d5c82cc8 in section `.orc_unwind_ip' Signed-off-by: Michael Forney Reviewed-by: Miroslav Benes Signed-off-by: Josh Poimboeuf Link: https://lore.kernel.org/r/20210509000103.11008-1-mforney@mforney.org Signed-off-by: Sasha Levin --- tools/objtool/elf.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/tools/objtool/elf.c b/tools/objtool/elf.c index 8676c7598728..6cf4c0f11906 100644 --- a/tools/objtool/elf.c +++ b/tools/objtool/elf.c @@ -1003,7 +1003,10 @@ static int elf_rebuild_rel_reloc_section(struct section *sec, int nr) list_for_each_entry(reloc, &sec->reloc_list, list) { reloc->rel.r_offset = reloc->offset; reloc->rel.r_info = GELF_R_INFO(reloc->sym->idx, reloc->type); - gelf_update_rel(sec->data, idx, &reloc->rel); + if (!gelf_update_rel(sec->data, idx, &reloc->rel)) { + WARN_ELF("gelf_update_rel"); + return -1; + } idx++; } @@ -1035,7 +1038,10 @@ static int elf_rebuild_rela_reloc_section(struct section *sec, int nr) reloc->rela.r_offset = reloc->offset; reloc->rela.r_addend = reloc->addend; reloc->rela.r_info = GELF_R_INFO(reloc->sym->idx, reloc->type); - gelf_update_rela(sec->data, idx, &reloc->rela); + if (!gelf_update_rela(sec->data, idx, &reloc->rela)) { + WARN_ELF("gelf_update_rela"); + return -1; + } idx++; } -- 2.33.0