From patchwork Fri Jan 21 12:58:52 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Biener X-Patchwork-Id: 50306 Return-Path: X-Original-To: patchwork@sourceware.org Delivered-To: patchwork@sourceware.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id EEF58385843E for ; Fri, 21 Jan 2022 12:59:21 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org EEF58385843E DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1642769962; bh=/PHg+0DGunzMD9Q8O9nQUZ6Xvd1+x9Mdyg8eoqDDCaE=; h=Date:To:Subject:List-Id:List-Unsubscribe:List-Archive:List-Post: List-Help:List-Subscribe:From:Reply-To:From; b=ImRgnbtKi3tJiTRfg4fPIEV3RZkuhrmjJySyInP4rPCLf5Z3TiEVFzwRr/Gfbg1lp B2mWDsJOem9FEFnu6YGs52mwn0+Su8V41RPLHPaRXKc3TlzqApciszImSCdEljducn aD1M9ioVp7QjRESPFw2U59PAieV0GiP09BvOq2rs= X-Original-To: gcc-patches@gcc.gnu.org Delivered-To: gcc-patches@gcc.gnu.org Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.220.29]) by sourceware.org (Postfix) with ESMTPS id B8BC63858403 for ; Fri, 21 Jan 2022 12:58:53 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org B8BC63858403 Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id 95CAA1F898 for ; Fri, 21 Jan 2022 12:58:52 +0000 (UTC) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 7F3FE13AF2 for ; Fri, 21 Jan 2022 12:58:52 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id KfSDHQyu6mGQOwAAMHmgww (envelope-from ) for ; Fri, 21 Jan 2022 12:58:52 +0000 Date: Fri, 21 Jan 2022 13:58:52 +0100 (CET) To: gcc-patches@gcc.gnu.org Subject: [PATCH] sanitizer/99673 - bad -Wstringop-overread diagnostic with asan MIME-Version: 1.0 Message-Id: <20220121125852.7F3FE13AF2@imap2.suse-dmz.suse.de> X-Spam-Status: No, score=-11.8 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Richard Biener via Gcc-patches From: Richard Biener Reply-To: Richard Biener Errors-To: gcc-patches-bounces+patchwork=sourceware.org@gcc.gnu.org Sender: "Gcc-patches" The testcase got fixed by lowering of &MEM[ptr + CST] to ptr + CST. Pushed. 2022-01-21 Richard Biener PR sanitizer/99673 * gcc.dg/asan/pr99673.c: New testcase. --- gcc/testsuite/gcc.dg/asan/pr99673.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 gcc/testsuite/gcc.dg/asan/pr99673.c diff --git a/gcc/testsuite/gcc.dg/asan/pr99673.c b/gcc/testsuite/gcc.dg/asan/pr99673.c new file mode 100644 index 00000000000..05857fd46c7 --- /dev/null +++ b/gcc/testsuite/gcc.dg/asan/pr99673.c @@ -0,0 +1,27 @@ +/* { dg-do compile } */ +/* { dg-additional-options "-Wstringop-overread" } */ + +struct B { + int i; + struct A { + short sa[8]; + } a[2]; +}; + +struct C { + char n, ax[]; +}; + +struct D { int i, j, k; }; + +int f (const short[8]); + +void g (struct C *pc, struct D *pd, int i) +{ + struct B *pb = (void *)pc->ax; + pd->i = pb->i; + + const short *psa = pb->a[i].sa; + if (f (psa)) + return; +}